JP3413088B2 - Dehydration combined 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 combined washing machine for dehydration, in which the rotation speed of a motor for rotating a dehydration tank is increased stepwise for dehydration.

[0002]

Conventionally, a washing machine for combined use of dehydration is provided with a rotating tub which also serves as a dehydrating tub and a washing tub, and a motor for rotating the rotating tub,
In some cases, during the dehydration operation, the rotation speed of the motor is controlled to be increased stepwise, so that the occurrence of vibration is prevented and the dehydration rotation is smoothly started up (foaming).

That is, if the rotation speed of the motor, that is, the rotation speed of the rotary tub is immediately increased to the final maximum rotation speed, a large vibration is generated, and especially in the first dehydration process after washing, dehydration is performed. Due to the relationship between the amount of water discharged from the laundry and the amount of water discharged, water tends to accumulate between the rotary tub and the water receiving tub outside the rotary tub. Bubbles are generated between the tank and the water receiving tank, which causes rotation resistance of the rotating tank, which may prevent the rotation from rising properly. In consideration of this, the rotation speed of the motor is increased stepwise as described above.

Conventionally, there are the following two methods for increasing the rotation speed of the motor in this way. One method is to control the motor on / off depending on time. That is, the motor is turned on for a predetermined time to increase the rotation speed of the motor, then the motor is turned off for a predetermined time to decrease the rotation speed of the motor, and the motor is turned on again for the predetermined time to increase the rotation speed of the motor. This is a method that is repeated.

The other method is to detect the rotation speed of the motor and control the motor so that the detected rotation speed reaches a preset target rotation speed. That is,
First, the rotation speed of the motor is increased until the rotation speed detected by the rotation speed detection means reaches a preset target upper limit rotation speed, and thereafter, the rotation of the motor is rotated until the detected rotation speed reaches a preset target lower limit rotation speed. This is a method in which the speed is decreased and the rotation speed of the motor is increased again until the next target upper limit rotation speed is reached.

However, in the former method (method of controlling ON / OFF depending on time), since the rotation speed varies depending on the load and the state at the time of dehydration, there is a problem that the dehydration rate and drainage efficiency easily vary.

On the other hand, the latter method (rotational speed control method)
Then, as shown in FIG. 18, since the motor is raised to the target upper limit rotation speed Na, the dehydration rate becomes stable. However, the target upper limit rotation speed N may still depend on the load and the condition.
Fall times ta, tb from a to the target lower limit rotation speed Nb
Variations easily occur. For this reason, the time required for drainage may not be secured or may become longer than necessary, and there is a problem that the drainage efficiency is not stable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a combined washing and dehydrating machine capable of stabilizing both the dehydration rate and the drainage efficiency as much as possible.

[0009]

In order to achieve the above object, in the washing machine for combined use of dehydration of the present invention, the rotation speed of the motor for rotating the dehydration tank is increased stepwise to perform dehydration.
In the above, a rotation speed detecting means for detecting the rotation speed of the motor, a control means for switching and controlling the electric power supplied to the motor between a case where the rotation speed of the motor is increased and a case where the rotation speed is decreased, And a descending time detecting means for detecting a descending time when the rotating speed is once increased and then decreased, wherein the control means, when increasing the rotating speed of the motor, the rotating speed detecting means. When the motor is controlled by the electric power supplied when the rotation speed is increased so that the rotation speed detected by the motor becomes the preset target rotation speed, and the rotation speed of the motor is decreased, the detection time by the descending time detecting means is It is characterized in that the motor is controlled by the electric power supplied when the rotation speed is lowered until a preset set fall time is reached.

In the above means, when the rotation speed of the motor is increased, the rotation speed of the motor is increased until it reaches the preset target rotation speed. However, the dehydration rate can be stabilized as much as possible. Further, when lowering the rotation speed of the motor, the rotation speed of the motor is lowered until the preset set fall time is reached, so that the time required for draining can be secured, and variations in load and state will occur. Even if there is, the drainage efficiency can be stabilized as much as possible.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. First, in FIG. 2 showing a schematic overall configuration of a fully automatic type washing machine with dehydration,
An outer tub 2 is swingably disposed in the outer box 1 via an elastic suspension mechanism 3. In the outer tub 2, a rotary tub 4 that doubles as a dehydrating tub and a washing tub is rotatably arranged.
An agitator 5 for washing is rotatably provided on the inner bottom of the rotary tub 4. In the rotary tank 4, the dehydration hole 4a is formed only in the upper part of the peripheral wall portion, and the dehydration hole is not formed in the other peripheral wall portions.

A drainage passage 6 is provided at the inner bottom portion of the outer tub 2 so as to extend from the central portion toward the rear side. An end portion of the drainage passage 6 serves as a drainage port 7, and the drainage port 7 is provided with an air trap 8 for water level detection.
The drainage port 7 is configured to be opened and closed by, for example, a motor type drainage valve 9. A drain hose 10 is connected to the lower portion of the drain valve 9. In addition, in the stirring body 5,
Many water passage holes are formed.

In this structure, when the drain valve 9 is opened, the water in the rotary tank 4 is discharged to the outside through the drain passage 6 and the drain hose 10. Also,
An auxiliary drainage port 11 for discharging the water overflowing from the rotary tank 4 is formed in the front part of the bottom of the outer tank 2. The auxiliary drainage port 11 communicates with the drainage hose 10 via a hose (not shown). In the case of this configuration, when the water in the rotary tub 4 is discharged into the outer tub 2 through the dehydration hole 4a during the dehydration operation, this drainage passes through the auxiliary drainage port 11 and the drainage hose 10 to the outside. It is configured to be discharged. A water level sensor (not shown) including a pressure sensor is connected to the air trap 8 via an air pipe 12, and the water level sensor is configured to detect the water level in the rotary tank 4.

A balance ring 13 is provided above the rotary tank 4, and an inner basket 14 made of a stainless steel plate and having a substantially drum shape is provided on the inner peripheral portion of the rotary tank 4. A large number of water passage holes are formed in the peripheral wall portion of the inner basket 14. In the lower part of the inner circumference of the rotary tank 4,
A bottom cover 15 is provided. Inner basket 14
A predetermined gap for water passage is provided between the rotary tank 4 and the rotary tank 4, and between the bottom cover 15 and the rotary tank 4. In the case of this configuration, during drainage or dehydration operation, the water in the rotary tank 4 flows downward or upward through the predetermined gap for water passage.

On the other hand, on the outer bottom portion of the outer tub 2, a motor 16 and a drive mechanism portion 17 for washing and dehydrating operations are arranged. The motor 16 is an induction motor, and the motor 1
The rotational force of 6 is transmitted to the drive mechanism section 17 via the belt transmission mechanism 18. Belt transmission mechanism 1
A belt 8c is stretched between a drive pulley 18a provided on the motor 16 side and a driven pulley 18b provided on the drive mechanism 17 side.

The drive mechanism section 17 has a well-known structure, and includes a clutch mechanism, a speed reducer, a brake device, and the like. The brake device of the drive mechanism unit 17 is a band brake device having a function of braking and stopping the rotary tub 4, and includes a brake drum provided on the tub shaft of the rotary tub 4 so as to rotate integrally therewith, The brake band is provided outside the brake drum. Further, the clutch mechanism of the drive mechanism unit 17 has a function of switching between a state in which the rotational force of the motor 16 is transmitted to only the stirring body 5 by decelerating it via the reduction gear and a state in which it is transmitted to the rotary tank 4 and the stirring body 5. is doing. The brake device and the clutch mechanism are configured to be driven by the drive source of the drain valve 9 (which is composed of a motor, a return spring, etc.) in conjunction with the opening / closing operation of the drain valve 9.

Specifically, during washing with the drain valve 9 closed, the drive mechanism unit 17 uses a brake device to rotate the rotary tub 4.
In the state in which is stopped by braking, the rotational force of the motor 16 is decelerated and transmitted only to the stirring body 5 to rotate the stirring body 5. Then, at the time of drainage and dehydration in which the drain valve 9 is opened, the drive mechanism unit 17 applies the rotational force of the motor 16 to the rotary tank 4 while the braking of the rotary tank 4 by the brake device is released.
Also, it is configured so that both of them are transmitted to the stirring body 5 and rotated at high speed.

A top cover 19 is provided on the upper part of the outer box 1.
Is attached, and on the back side of the rear plate 19a in the top cover 19, an electromagnetic water supply valve 20 is arranged, and a water injector 21 equipped with a detergent dispenser is arranged. The water injector 21 is configured such that the detergent is stored in the detergent dispenser in advance so that when the water is supplied by the water supply valve 20, the water is transferred into the tank.

The top cover 19 is provided with, for example, a two-fold type lid 22 that can be opened and closed so as to open and close the entrance of the laundry. A tank cover 23 is provided on the outer tank 2.
Is attached, and an inner lid 24 is provided on the tank cover 23 so as to be openable and closable. The inner lid 24 is provided with a water receiving portion 25 that receives water flowing out from the water injector 21. Although not shown, a small hole is formed in the water receiving portion 25, and water is supplied into the rotary tank 4 through the small hole.

FIG. 3 shows a circuit configuration for driving and controlling the motor 16. In this FIG.
Between one power supply line 26a of the AC power supply 26 and the other power supply line 26b, a zero-cross of the power supply voltage of the AC power supply 26 and the AC voltage waveform, and a voltage / waveform detection circuit 27 for detecting the power supply frequency are connected. ing. The forward rotation terminal 16a and the reverse rotation terminal 16b of the motor 16 are connected to one power supply line 26a via triacs 28 and 29, respectively, and the common terminal 16c of the motor 16 is connected to the other power supply line 26b.

The triacs 28 and 29 are turned on / off by transistors 30 and 31 which are switching elements.
The transistors 30 and 31 are controlled to be turned off (off is a natural extinction), and the transistors 30 and 31 are controlled to be turned on / off by a control circuit 32 including a microcomputer. The control circuit 32 controls loads other than the motor 16 (such as the water supply valve 20 and the drain valve 9) in accordance with the program for the washing operation, and also controls the motor 16 based on the pulse given from the Hall element 33 described below. It functions as a rotation speed detecting means for detecting the rotation speed, and also as a phase control means and a fall time detecting means.

Although not shown, a permanent magnet (not shown) for speed detection is provided on the rotating shaft of the motor 16, and a hall element 33 for detecting this magnetic pole is provided at a stationary portion corresponding to this permanent magnet. ing.

Now, when the fully automatic course is selected and a start command is given by the operation of various switches (not shown), the control circuit 32 executes various controls and processes in the following order, roughly speaking. .

1: Detecting the amount of laundry ... While the laundry is stored in the rotary tub 4 in advance, a constant electric power is intermittently supplied to the motor 16 by, for example, phase control so that the stirring body 5 is intermittently supplied. Drive to rotate. Then, at this time, the degree of change in the rotation speed is detected based on the pulse signal given from the hall element 33, and the laundry amount is determined to be “large”, “medium” or “small” based on the degree of change. It is supposed to do.

2: Washing stroke control ... This executes water supply control, agitation control, and drainage control. The water supply control is performed by opening the water supply valve 20 with the drain valve 9 closed and supplying the set amount of water to the rotary tank 4 based on the detection signal from the water level sensor. When water is detected, the water supply valve 20 is controlled to be closed. In the stirring control, the AC power supply 26 is fully energized to the motor 16 for a predetermined time to rotate the motor 16 forward and backward.
For drainage control, the drainage valve 9 is opened.

3: First dehydration process control: The rotary tank 4 is rotated by the motor 16 with the drain valve 9 opened. In this case, the rotation speed of the motor 16 is increased stepwise as shown in FIG. This dehydration process control will be described later in detail.

4: Rinse stroke control for the first time ... Similar to the case of the washing stroke control, the water supply control, the stirring control, and the drainage control are executed. 5: Second dehydration process control ... The same control as the first dehydration process control is executed. 6: Second rinse process control ... The same control as the first rinse process control is executed. 7: Final dehydration process control: This also performs the same control as the first dehydration process control.

In this case, as described above, the first dehydration process control, the second dehydration process control, and the final dehydration process control are basically the same controls, so the first dehydration process control is performed. Will be described in detail mainly with reference to FIGS. 1 and 5.

When the dehydration process is started, first, step A
In 1, the timer 1 is started and the timer 2 and the counter are cleared. The timer 2 is a subtraction timer. Then, in step A2, the motor 1
6, the AC power supply 26 is fully energized (see FIG. 4A), and the output of the motor 16 is set to 100%. This full energization is performed as follows.

That is, the control circuit 32 detects the zero cross of the AC power supply 26 based on the signal from the voltage / waveform detection circuit 27, and sequentially turns on the triac 28 at the substantially zero cross point (in this case, the triac 29 is Leave off). As a result, the motor 16 is fully energized to rotate the rotary tank 4 in one direction, and the rotation speed of the motor 16 and thus the rotary tank 4 increases. At this time, when a large amount of water in the rotary tub 4 is discharged into the outer tub 2 at a time, the water tends to accumulate between the rotary tub 4 and the outer tub 2, but is sequentially discharged.

Next, in step A3, the timer 1
Is a preset initial dehydration time T1 (for example, 30 seconds)
When it is determined that it has not elapsed, it is determined whether the output of the motor 16 is 100% in step A4. When it is determined that the output of the motor 16 is 100%, the rotation speed of the motor 16 is detected based on the pulse given from the Hall element 33 in step A5, and the detected rotation speed N is detected.
(What is actually detected is the rotation speed of the motor 16,
For the sake of explanation, it is determined whether or not the rotation speed of the rotary tank 4 is equal to or higher than a preset first target rotation speed N1 (for example, 180 rpm).

The detected rotation speed N is the first target rotation speed N1.
If it is determined that the time has not reached, the process returns to step A3 in accordance with "NO". When the detected rotation speed N reaches the first target rotation speed N1, “YE
According to "S", the process proceeds to step A6, and the timer 2 is set to a preset first set fall time t1 (for example, 8 seconds). Next, in step A7, the output of the motor 16 is controlled to 20% by controlling the electric power supplied to the motor 16 by phase control. As shown in FIG. 4 (b), this phase control is performed with a duty ratio (energization angle) α
Is controlled to be 20% of the case of full energization (100%). 20% output of motor 16
The motor 16 and, consequently, the rotation speed of the rotary tank 4 are reduced by controlling the above.

When the output of the motor 16 is set to 20% in this way, the process returns to step A3. And step A4
In the case, when it is determined that the output of the motor 16 is not 100%, the process proceeds to step A8 according to "NO", and it is determined here whether the timer 2 has become "0". When the timer 2 is not "0" (when the first set fall time t1 has not elapsed), step A
3, the rotation speed of the motor 16 and thus the rotation tank 4 is decreased until the timer 2 becomes "0".

At step A8, the timer 2 is set to "0".
When it is determined that (the first set fall time t1 has elapsed), the process proceeds to step A9 according to "YES", the output of the motor 16 is set to 100% again, and then the process returns to step A3. 100% output of the motor 16
By setting to 1, the rotation speed of the motor 16 and thus the rotation tank 4 increases again.

The control is performed during steps A3 to A9 until the initial dehydration time T1 elapses. When the initial dehydration time T1 has elapsed from the start of dehydration, it is determined in step A3 that the initial dehydration time T1 has elapsed, and the process proceeds to step A10 according to "YES".

At step A10, it is judged whether the dehydration is completed (it is judged whether the elapsed time of the timer 1 from the start of the dehydration reaches a preset dehydration time), and it is judged that the dehydration is not completed. If so, the process proceeds to step A11 in accordance with "NO", and it is determined whether the output of the motor 16 is 100%. When it is determined that the output of the motor 16 is 100%, it is determined that the rotation speed of the motor 16 is increasing, and the process proceeds to step A12 according to "YES".
It is determined whether the counter is "0". in this case,
Since the counter is “0”, the process proceeds to step A13 in accordance with “YES”, and it is determined whether the detected rotation speed N is equal to or higher than the preset second target rotation speed N2 (for example, 260 rpm).

The detected rotation speed N is the second target rotation speed N2.
If it is determined that the time has not reached, the process returns to step A3 in accordance with "NO". When the detected rotation speed N reaches the second target rotation speed N2, “YE
S ”, the process proceeds to step A14, 1 is added to the counter, and then, in step A15, the second set fall time t2 preset in the timer 2 (for example, 10 seconds).
Set. Next, in step A16, the output power of the motor 16 is controlled to be 20% by controlling the electric power supplied to the motor 16 by phase control, and the process returns to step A3. By controlling the output of the motor 16 to 20%, the rotation speed of the motor 16 and thus of the rotary tank 4 decreases.

Then, in step A11, it is determined that the output of the motor 16 is not 100%, the process proceeds to step A17 in accordance with "NO", where the timer 2 is "0".
Or not (whether or not the second set fall time t2 has elapsed). When the second set fall time t2 has elapsed and the timer 2 is determined to be "0", the output of the motor 16 is set to 100% again (step A
18) Then, the process returns to step A3.

Since the counter is "1" in step A14, it is determined that the counter is not "0" in step A12, and the process proceeds to step A19 according to "NO". Here, it is determined whether or not the counter is "1", and when it is determined that the counter is "1", the process proceeds to step A20, and the detected rotation speed N is the preset third value. It is determined whether or not the target rotation speed N3 (for example, 340 rpm) or more.

The detected rotation speed N is the third target rotation speed N3.
If it is determined that the time has not reached, the process returns to step A3 in accordance with "NO". When the detected rotation speed N reaches the third target rotation speed N3, the process proceeds to step A14 and 1 is added to the counter. As a result, the counter becomes "2". Then, in step A15, the timer 2
The second set fall time t2 is set again, and step A1
6, the output of the motor 16 is set to 20%, and the process returns to step A3.

Then, when the second set fall time t2 has passed and it is determined in step A17 that the timer 2 is "0", the output of the motor 16 is set to 100 again.
% (Step A18), after which the process returns to step A3.

Since the counter is "2" in step A14, it is determined that the counter is not "0" in step A12, and step A1
In 9, it is determined that the counter is not “1” and “N
According to "O", the process proceeds to step A21. If it is determined that the counter is “2”, step A
22, the detected rotation speed N is set to the preset fourth
It is determined whether or not the target rotation speed N4 (for example, 420 rpm) or more.

The detected rotation speed N is the fourth target rotation speed N4.
If it is determined that the time has not reached, the process returns to step A3 in accordance with "NO". When the detected rotation speed N reaches the fourth target rotation speed N4, the process proceeds to step A14 and 1 is added to the counter. As a result, the counter becomes "3". Then, in step A15, the timer 2
The second set fall time t2 is set again, and step A1
6, the output of the motor 16 is set to 20%, and the process returns to step A3.

When the second set fall time t2 has passed and it is determined in step A17 that the timer 2 is "0", the output of the motor 16 is set to 100 again.
% (Step A18), after which the process returns to step A3.

Since the counter is "3" in step A14, it is determined in step A12 that the counter is not "0", and step A1
In 9, it is determined that the counter is not "1", and further, in step A21, it is determined that the counter is not "2", and according to "NO", the process proceeds to step A23. In this step A23, the detected rotation speed N is
A preset final target rotation speed N5 (for example, 900r
pm) or above.

When it is determined that the detected rotation speed N has not reached the final target rotation speed N5, the process returns to step A3 in accordance with "NO". When the detected rotation speed N reaches the final target rotation speed N5, in step A24, the timer 2
Is set to a third set fall time t3 (for example, 5 seconds), the process proceeds to step A16, and the output of the motor 16 is set to 2
The value is set to 0%, and the process returns to step A3.

Then, when the third set falling time t3 has elapsed and it is determined in step A17 that the timer 2 is "0", the output of the motor 16 is set to 100 again.
% (Step A18), after which the process returns to step A3.

After that, the final target rotation speed N5 is increased,
The descending is repeated until the third set descending time t3 elapses, and when the elapsed time by the timer 1 reaches the dehydration time, it is determined in step A10 that the dehydration is completed, and according to "YES", the process proceeds to step A25. Then, the motor 16 is turned off and the first dehydration process control is completed.

The second dehydration process control and the final dehydration process control are also controlled in the same manner as the first dehydration process control described above.

According to the above-mentioned embodiment, the following effects can be obtained. Rotational speed of the motor 16 (rotary tank 4
Rotation speed of the motor 16), the rotation speed of the motor 16 is set to a preset target rotation speed N1, N2, N3.
Since I am trying to raise it until it becomes N4, N5,
It is possible to stabilize the dehydration rate as much as possible even if there are variations in the load and the state. Further, when the rotation speed of the motor 16 is decreased, the preset falling times t1 and t
Since the rotation speed of the motor 16 is decreased until the time becomes 2, t3, it is possible to secure the time required for drainage in each case without excess or deficiency, and to stabilize the drainage efficiency as much as possible even if there are variations in load or state. Will be able to.

When the rotation speed of the motor 16 is increased, the AC power supply 26 is fully energized, and when the rotation speed of the motor 16 is decreased, the energization rate is reduced by phase control so that the motor 16 is supplied. Since the power supply is reduced, there is an advantage that the control circuit configuration is simple and the control is accurate, compared with the case where the main coil and the auxiliary coil are switched and controlled.

Further, when the rotation speed of the motor 16 is decreased, the rotation speed level, in this case, the level of the first target rotation speed N1 and the second to fourth target rotation speeds N2 to N2.
By changing the set descent times t1, t2, t3 according to the level of N4 and the level of the final target rotation speed N5, it is possible to secure the required drainage time according to each state, and to control more efficiently. There is.

FIG. 6 shows a second embodiment of the present invention. This second embodiment differs from the above-mentioned first embodiment in the following points. In the above-described first embodiment, when the rotation speed of the motor 16 is decreased, the power supplied to the motor 16 (the motor 1
However, in the second embodiment, the electric power supplied to the motor 16 (the output of the motor 16) is changed according to the rotational speed of the motor 16 (the rotational speed of the rotary tank 4). I am trying to change.

That is, when the rotation speed is in the range of 0 to 200 rpm, the output of the motor 16 is 20% and the rotation speed is 20%.
The output of the motor 16 is 25 in the range of 0 to 600 rpm.
%, The output of the motor 16 is 29% when the rotation speed exceeds 600 rpm.

As described above, when the rotation speed of the motor 16 is lowered, the motor 1 is rotated according to the rotation speed of the motor 16.
By changing the electric power supplied to 6, it is possible to reduce uncomfortable feeling due to the electromagnetic noise that accompanies the phase control as much as possible, and it is possible to realize dehydration control with an appropriate output.

Next, a third embodiment of the present invention will be described with reference to FIGS. 2 and 7-10. In the third embodiment, the rotary bath 4 is provided with a finisher charging device 35 having a well-known structure in the upper part thereof.

The finishing agent feeder 35 is shown in FIGS.
As shown in (a), it has a plurality of chambers, in this case three chambers, and specifically, the first chamber 36 and the second chamber provided in the upper rear part of the first chamber 36. 37 and this second
And a third chamber 38 provided on the right side of the first chamber 36 in front of the chamber 37, and a lid 39 is detachably attached to the upper portion. The lid 39 has a first
A finishing agent inlet 40 is formed at a position facing the chamber 36.

From the first chamber 36 to the second chamber 37, the first
Of the second chamber 37 from the second chamber 37 to the third chamber 38.
7 communicates with the communication passage 42 formed from the bottom surface to the inside of the third chamber 38. Further, from the third chamber 38 to the outside of the finisher charging device 35 (inside the rotary tank 4), the third chamber 38
Is communicated with the discharge port 43 formed in the upper part of the back wall of the.

In the case of using the finishing agent charging device 35, a viscous liquid finishing agent 44 such as a softening finishing agent is introduced from the finishing agent charging port 40 into the first chamber 36 before the washing operation is started. Put in (finishing agent 4 in FIG. 8)
4 is indicated by hatching for convenience). Its finishing agent 4
No. 4 remains in the first chamber 36 until the washing process is completed.

While the first dehydration process is started and the detected rotation speed N is controlled to be equal to or lower than the first target rotation speed N1 (steps A1 to FIG. 10 and FIG. 5).
(See A9), the rotation speed of the rotary tank 4 is low, and the centrifugal force applied to the finishing agent 44 is low, so the finishing agent 44 is pressed against the back wall of the first chamber 36.
It remains in the first chamber 36.

Then, when the rotation speed of the rotation tank 4 is increased to the second target rotation speed N2 (in this case, for example, 340 rpm), the actual rotation speed of the rotation tank 4 is the minimum finishing agent transfer rotation speed N7. At (for example, 300 rpm) or more, the finishing agent 44 moves up the back wall of the first chamber 36 due to the centrifugal force generated by the rotation of the rotary tank 4, and as shown in FIG. Is transferred to the second chamber 37 through the communication port 41.

Therefore, in the present embodiment, the control circuit 3
2 performs control as shown in FIG. In addition, this FIG.
5, the same parts as those in FIG. 5 of the first embodiment are designated by the same step numbers.

Now, step B1 after step A10
In, it is detected whether or not the detected rotation speed N has become equal to or higher than the above-mentioned finishing agent transfer minimum rotation speed N7, and when it is determined that the finishing agent transfer minimum rotation speed N7 has not been reached, the step is followed by "NO". When it is determined that the rotation speed of the finishing agent transfer is the minimum rotation speed N7 or more, the process proceeds to step B2 in accordance with "YES", where 1 is added to the finishing agent F (flag), and then step A11.
Move to. In this case, the finishing agent 44 remains in the second chamber 37 until the rotation speed of the rotary tank 4 reaches the second target rotation speed N2.

After the detected rotation speed N reaches the second target rotation speed N2 (step A13), the timer 2 is set to the second set fall time t2 (step A1).
5) As the output of the motor 16 is set to 20% (step A16), the rotation speed of the rotary tank 4 decreases.

Whether or not the second set fall time t2 set in the timer 2 has elapsed (step A17),
And the detected rotation speed N is the lower limit rotation speed N6 (for example, 200
rpm) or less (step B)
3). If the detected rotation speed N reaches the lower limit rotation speed N6 or less before the second set fall time t2 elapses, the step A1 is performed without waiting for the second set fall time t2 to elapse.
8 and set the output of the motor 16 to 100%,
The rotation speed of the rotary tank 4 is increased again. If the second set fall time t2 elapses before the detected rotation speed N becomes equal to or lower than the lower limit rotation speed N6, the first
Similar to the embodiment, the output of the motor 16 is set to 100%, and the process returns to step A3. The control thereafter is the same as in the first embodiment.

Therefore, in this case, once the rotation speed of the rotary tank 4 has risen to the finishing agent transfer minimum rotation speed N7 or more, the rotation speed of the rotary tank 4 is lower than the lower limit rotation speed N6 until the dehydration is completed. Since it does not descend downward, it can be prevented from being transferred from the second chamber 37 to the third chamber 38 on the way.

When the first dehydration process is completed (when the rotation of the rotary tank 4 is stopped), the finishing agent 44 is
As shown in FIG. 8 (c), the second chamber 3
7 is transferred to the third chamber 38 through the communication passage 42 and stays there. The finishing agent 44 remains in the third chamber 38 during the first rinsing stroke after the first dehydrating stroke.

After that, when the second dehydration process is started and the rotation speed of the rotary tank 4 becomes equal to or higher than a predetermined rotation speed, the third
8D, the finishing agent 44 remaining in the chamber 38 passes through the discharge opening 43 from the third chamber 38 to the outside of the finishing agent feeder 35 (inner peripheral portion of the rotary tank 4). Is discharged to. When the second dehydration process is completed, the finishing agent 44 remaining on the inner peripheral portion of the rotary tank 4 flows to the lower portion inside the rotary tank 4 by natural flow. After that, in the second rinsing process, the finishing agent 44 is added to the rotary tank 4
It comes to be mixed with the water supplied inside.

In the third embodiment as described above, in the one provided with the finisher charging device 35, the rotation speed of the rotary tank 4 is once set to the finisher transfer minimum rotation speed N7 or more in the first dehydration process. After the rise, the rotation speed of the rotary tank 4 does not fall below the lower limit rotation speed N6 until the dehydration is completed, so that the finishing agent 44 is in the middle of the second chamber 3
It is possible to prevent the transfer from 7 to the third chamber 38.

Incidentally, during the first dehydration process, the second
When it is transferred from the chamber 37 to the third chamber 38, the finishing agent 44 is removed by the centrifugal force caused by the subsequent rotation of the rotary tank 4.
It will be discharged through the discharge port 43 to the outside of the finisher charging device 35 (inner peripheral portion of the rotary tank 4). In this way, in the first rinsing stroke, the finisher 44
However, it will be mixed with the supplied water. In the present embodiment, this can be reliably prevented.

FIG. 11 shows a fourth embodiment of the present invention. This fourth embodiment differs from the first embodiment in the following points. That is, the rotation speed of the motor 16 (rotary tank 4) is set to the second, third, and fourth target rotation speeds N2, N3.
When the speed is increased to N4, the speed is changed according to the rotation speed decreased in the previous decrease time. Specifically, the second, third and fourth target rotational speeds N2, N3, N
The rotation speed decreased before increasing to 4 is 0 to -50r.
In the case of pm range, target rotation speeds N2, N3, N4
Is set to a value obtained by adding 50 rpm to the detected rotation speed Nx after the descent, and in the range of -50 to -100 rpm, the target rotation speeds N2, N3, N4 are set to 75 rpm to the detected rotation speed Nx after the descent. Set to the value with
When it is decreasing by -100 rpm or more, the target rotation speeds N2, N3, N4 are set to 1 after the lowering detected rotation speed Nx.
Set it to a value with 00 rpm added.

In this case, the fact that the amount of the lowered rotation speed is small can be regarded as the case where the water content is large. In such a case, the target rotation speed should not be increased greatly, and conversely. , The large amount of the lowered rotation speed can be considered to be the case where the water content is small,
In such a case, the target rotation speed can be raised faster. By performing such control, dehydration control according to the state can be further performed.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. 12 and 13. The fifth embodiment is particularly adapted to cope with belt slippage of the belt transmission mechanism 18 for transmitting the rotational force of the motor 16 to the rotary tank 4 side during dehydration.

When the output of the motor 16 is set to 100% and the rotation speed of the motor 16 is increased with the start of the dehydration process, belt slippage occurs between the drive pulley 18a and the belt 18c of the belt transmission mechanism 18. In this case, since the load on the motor 16 becomes smaller than usual, the rotation speed of the motor 16 (detected rotation speed N) rises faster than usual as shown in FIG. Will not rise soon.

In order to deal with such a situation, in the present embodiment, the control circuit 32 performs the control shown in FIG. In FIG. 12, the same parts as those in FIG. 5 of the first embodiment are designated by the same step numbers. In this case, the control circuit 32 has a function of arrival time detecting means as described later.

After setting the output of the motor 16 to 100% in step A2, the timer 3 is started in step C1. Then, in step A5, it is determined whether or not the detected rotation speed N is equal to or higher than the first target rotation speed N1, and when it is determined that the detected rotation speed N is equal to or higher than the first target rotation speed N1, the step is followed by “YES”. Move to C2. Here, it is determined whether or not the elapsed time of the timer 3 is equal to or longer than a preset lower limit arrival time t4 (for example, 0.8 seconds), and when it is faster than t4 (when the rotation speed of the motor is faster than normal). In accordance with "NO", the process proceeds to step C3, where the timer 3 is once cleared and restarted.

Then, in step C4, the timer 3
Of the preset waiting time t5 (for example, 2
(Second), and the motor 16 is continuously operated with the output of the motor 16 kept at 100%. At this time, even if belt slippage occurs in the belt transmission mechanism 18, the motor 16
By continuously operating with the output of 100% for a predetermined time, the belt slip is eventually resolved, and the rotation speed of the rotary tub 4 rises to near the target rotation speed as much as possible.

When the elapsed time of the timer 3 reaches the waiting time t5 in step C4, the first set fall time t1 is set in the timer 2 (step A6) and the output of the motor 16 is set to 20% (step A6). A7), and thereafter, the process returns to step C1. In step C2, when the elapsed time of the timer 3 is equal to or longer than the arrival lower limit time t4, the process proceeds to step A7 without waiting for the waiting time.

According to such an embodiment, when the belt slippage occurs and the increase time of the rotation speed of the motor 16 is abnormally short, the output of the motor 16 is continuously operated at 100% for a predetermined time. The rotation tank 4 can be raised to the target rotation speed as much as possible, and the dehydration rate can be stabilized as much as possible.

In the above-described embodiment, the belt slippage is dealt with when the output of the motor 16 is set to 100% at the initial stage of dehydration.
It is also possible to perform the control as described above every time the percentage is set.

Next, the sixth embodiment of the present invention will be described with reference to FIG.
It will be described with reference to FIGS. This sixth embodiment is
The control when the motor 16 is controlled at the final target rotation speed is different from that of the first embodiment. 12, which shows the control contents of the control circuit 32, the same parts as those in FIG. 5 of the first embodiment are designated by the same step numbers. In the first embodiment, when the motor 16 is controlled at the final target rotation speed N5, when the rotation speed of the motor 16 is decreased,
The control is performed only by the third set descent time t3. On the other hand, in the sixth embodiment, when lowering the rotation speed of the motor 16, control is performed by observing the third set fall time t3 and the detected rotation speed of the motor 16.

Specifically, the detected rotation speed N of the motor 16
Exceeds the final target rotation speed N5 (step A2
3) Then, the third set fall time t3 is set in the timer 2 (step A24), and the output of the motor 16 is set to 20%. In this state, the output of the motor 16 is continuously operated at 20% until the third set fall time t3 elapses (until the timer 2 becomes "0" in step A17).
Along with this, the rotation speed of the motor 16 (rotary tank 4) decreases.

When the third set fall time t3 has elapsed and it is determined in step A17 that the timer 2 is "0", the flow shifts to step D1 according to "YES", where the detected rotation speed is detected. It is determined whether N is equal to or lower than a preset lower limit rotation speed N8 (for example, 850 rpm). When the detected rotation speed N is equal to or lower than the lower limit rotation speed N8, the process proceeds to step A18 in accordance with "YES", the output of the motor 16 is set to 100%, and the rotation speed is increased again (see FIG. 15). .

If it is determined in step D1 that the detected rotation speed N is not lower than the lower limit rotation speed N8, the output of the motor 16 is reduced by 20% until the detected rotation speed N becomes lower than the lower limit rotation speed N8. When the detected rotation speed N becomes less than or equal to the lower limit rotation speed N8, "YE
According to "S", the process proceeds to step A18, the output of the motor 16 is set to 100%, and the rotation speed is increased again (see FIG. 16).

According to such an embodiment, in the final target rotation speed control, the motor 16 is driven to the target maximum rotation speed N5.
When the rotation speed of the motor 16 is decreased after the temperature is increased to 1, the decrease is performed until the two conditions, that is, the elapse of the third set descent time t3 and the lower limit rotation speed N8 or less, are satisfied. Since the rotation speed of the motor 16 is increased again, it is possible to prevent the number of times the rotation speed of the motor 16 is increased and decreased from being unnecessarily increased, and it is possible to prevent the noise caused by the electromagnetic noise generated by the switching. Pleasure can be reduced as much as possible.

FIG. 17 shows a seventh embodiment of the present invention. This seventh embodiment differs from the first embodiment in the following points. That is, in the seventh embodiment, the first, second and third motors are used when the rotation speed of the motor 16 is decreased.
Each of the set descent times t1, t2, t3 is partially changed in the first dehydration step (dehydration 1), the second dehydration step (dehydration 2), and the final dehydration step. In particular,
In the first dehydration process, each set descent time t1, t2, t
3 is 8 seconds, 10 seconds and 5 seconds, respectively, and in the second dehydration process, the set descent times t1, t2 and t3 are 6 respectively.
Second, 8 seconds, 5 seconds, and in the final dehydration process, the set descent times t1, t2, t3 are 5 seconds, 6 seconds, 5 seconds, respectively.

In such an embodiment, dehydration can be performed more efficiently according to each dehydration process.

[0088]

As described above, according to the present invention,
The following effects can be obtained. According to the dehydrating and washing machine of claim 1, in which the rotation speed of the motor for rotating the dehydrating tub is increased stepwise for dehydration,
When increasing the rotation speed of the motor, the rotation speed of the motor is increased until it reaches a preset target rotation speed, so that the dehydration rate is stabilized as much as possible even if there are variations in load or state. be able to. Further, when lowering the rotation speed of the motor, the rotation speed of the motor is lowered until the preset set fall time is reached, so that the time required for draining can be secured, and variations in load and state will occur. Even if there is, the drainage efficiency can be stabilized as much as possible.

According to the dehydrating and washing machine of the second aspect, when the rotation speed of the motor is increased, the AC power source is fully energized, and when the rotation speed of the motor is decreased, phase control is applied to the motor. Since the supply power is reduced, there is an advantage that the control circuit configuration is simpler and the control can be performed more accurately than in the case of controlling by switching between the main coil and the auxiliary coil, for example. Further, when the rotation speed of the motor is decreased, by changing the electric power supplied to the motor according to the rotation speed of the motor, it is possible to reduce the discomfort caused by the electromagnetic sound generated by the phase control as much as possible. Dehydration control with various outputs can be realized.

According to the dehydrating and washing machine of the third aspect of the present invention, the dehydrating tub is provided with the finishing agent throwing device, and after the rotation speed of the motor once rises to the finishing agent transfer minimum rotation speed or more, Since the rotation speed of does not drop below the lower limit rotation speed until the dehydration is completed, it is possible to prevent the finish agent from being erroneously transferred.

According to the washing machine for combined dehydration of claim 4, by changing the set descent time according to the rotation speed level,
You can secure the required drainage time according to each condition,
There is an advantage that it can be controlled more efficiently.

According to the washing and washing machine of the fifth aspect, the target rotation speed of the motor to be raised is changed according to the rotation speed of the motor lowered during the set descent time, whereby the state is further improved. Dehydration control can be performed accordingly.

According to the sixth aspect of the washing machine for combined use of dehydration, when belt slippage occurs and the rising time of the motor rotation speed is abnormally short, the washing machine is continuously operated for a predetermined time with the power supplied when the motor rotation speed increases. As a result, the dehydration tank can be raised to the target rotation speed as much as possible, and the dehydration rate can be stabilized as much as possible.

According to the washing machine for combined dehydration of claim 7, in the case of controlling by the final target rotation speed control, when the motor rotation speed is lowered after the motor is raised to the target maximum rotation speed, the set descent time is set. And the detected rotation speed falls below the lower limit rotation speed until both conditions are satisfied, and then the motor rotation speed is increased again. Therefore, the rotation speed of the motor is increased. It is possible to prevent an unnecessary increase in the number of times of switching between and the lowering, and it is possible to reduce uncomfortable feeling due to an electromagnetic sound generated due to the switching.

According to the washing machine with combined dehydration of claim 8, dehydration is performed.
When the process is performed a plurality of times , by changing the set descent time for each dehydration process, it becomes possible to perform the dehydration more efficiently according to each dehydration process.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention and showing a change in rotation speed.

FIG. 2 is a vertical sectional side view of a washing machine for combined use of dehydration.

FIG. 3 is a diagram showing an electrical configuration of a main part.

FIG. 4 is a diagram showing a mode of energizing the motor, where (a) is a diagram showing a case of full energization, and (b) is a diagram showing a case of phase control.

FIG. 5 is a flowchart showing the control contents during dehydration.

FIG. 6 is a diagram showing a second embodiment of the present invention, showing a relationship between a detected rotation speed and a duty ratio by phase control.

FIG. 7 shows a third embodiment of the present invention, and is a perspective view of a finisher charging device.

FIG. 8 is a cross-sectional view showing the order of transferring the finishing agent in the finishing agent feeder.

FIG. 9 is a flowchart showing control contents.

FIG. 10 is a view equivalent to FIG.

FIG. 11 shows a fourth embodiment of the present invention and is a diagram showing a relationship between a descending rotation speed and a target rotation speed.

FIG. 12 is a flowchart showing a fifth embodiment of the present invention.

FIG. 13 is a view equivalent to FIG.

FIG. 14 is a flowchart showing a sixth embodiment of the present invention.

FIG. 15 is a diagram showing a change in rotation speed in final target rotation speed control.

16 is a view equivalent to FIG.

FIG. 17 is a diagram showing a seventh embodiment of the present invention, showing the relationship between the dehydration process and the set descent time.

FIG. 18 is a diagram showing a conventional example, showing a change in rotation speed.

[Explanation of symbols]

4 is a rotary tank (dehydration tank), 16 is a motor, 18 is a belt transmission mechanism, 18c is a belt, 26 is an AC power supply, 28, 29
Is a triac, 32 is a control circuit (control means, rotation speed detection means, descent time detection means, arrival time detection means), 3
5 is a finishing agent feeder, 36, 37 and 38 are first, second and
The third chamber, 44, shows the finish.

Claims (8)

(57) [Claims] 1. The rotation speed of a motor for rotating a dehydration tank
Switching in those to be dehydrated stepwise raised at a rotation speed detecting means for detecting a rotational speed of the motor, the electric power supplied to the motor, and if the lowering in the case of increasing the rotational speed of the motor And a descent time detection unit that detects a descent time when the rotational speed of the motor is once increased and then decreased, and the control unit increases the rotational speed of the motor. In this case, the motor is controlled by the electric power supplied when the rotational speed is increased so that the rotational speed detected by the rotational speed detection means becomes a preset target rotational speed, and when the rotational speed of the motor is decreased, The motor is controlled by the electric power supplied when the rotation speed is lowered until the detection time by the fall time detecting means reaches a preset set fall time. The washing machine. 2. A phase control means for controlling the phase of the AC voltage of the AC power supply, wherein the control means, when increasing the rotation speed of the motor, fully energizes the AC power supply to the motor to control the rotation speed of the motor. In the case of lowering, the motor is controlled so that the AC power is phase-controlled by the phase control means, and the phase control is performed by changing the energization rate according to the rotation speed detected by the rotation speed detection means. The washing machine for combined use of dehydration according to claim 1, wherein 3. The dewatering tank is provided with a finishing agent feeder for sequentially transferring the finishing agent as the stroke progresses and finally injecting the finishing agent into the dewatering tank, and the control means once controls the rotation speed of the motor. When the finishing agent transfer minimum rotation speed is increased by more than the preset lower limit rotation speed, even if the detection time by the fall time detecting means is less than the set fall time, the lowering speed is not lowered. The washing machine for combined use of dehydration according to 1 or 2. 4. The washing machine for combined use of dehydration according to claim 1, wherein the control means changes the set descent time according to the rotation speed level. 5. The washing machine for combined use of dehydration according to claim 1, wherein the control means changes the next target rotation speed according to the rotation speed of the motor lowered during the set fall time. 6. A belt transmission mechanism is provided in the rotation transmission path from the motor to the dehydration tank, and the control means, when increasing the rotation speed of the motor, until the rotation speed detected by the rotation speed detection means reaches the target rotation speed. When the arrival time is detected by the arrival time detection means less than a preset arrival lower limit time, the motor is continuously operated for a predetermined time with the power supplied when the rotation speed increases. The combined washing machine for dehydration according to claim 1. 7. The control means, when controlling the motor by the final target rotation speed control, raises the motor to the target maximum rotation speed, and then detects the detection time by the fall time detection means for a set fall time or more. The rotation speed of the motor is decreased until the rotation speed detected by the rotation speed detecting means is equal to or lower than a preset lower limit rotation speed, and then the motor is again increased to the target maximum rotation speed. The washing machine for combined use of dehydration according to 1. 8. The control means controls when the dehydration process is performed a plurality of times.
In this case, the combined washing and dehydration machine according to claim 1 , wherein the set descent time is changed for each dehydration process .