JPH08238393A - Washing machine - Google Patents

Abstract

PURPOSE: To reduce vibrations and noises by eliminating the eccentricity of laundry inside a dehydrating vessel by providing a washing machine with a TRIAC control means for controlling a TRIAC so as to linearly rise it until the number of rotations at the dehydrating vessel in the case of starting dehydration reaches the number of rotations of high-speed dehydration. CONSTITUTION: The rotating speed of a dehydrating vessel 8 is linearly accelerated by controlling the speed of a motor with phase control. In this case, however, the acceleration is performed so as to speedily pass the number of rotations corresponding to a resonance frequency provided for the washing machine. The inclination in this acceleration of rotating speed is set while considering the quantity of water to be drained at the time of dehydrating the maximum quantity of laundry or the acceleration not to generate any foam. Concerning this phase control, a zero cross detection circuit 14 detects a zero cross point for the voltage waveform of a commercial power source 1, a TRIAC control circuit 11 outputs a gate control signal 12 to a TRIAC 2 for forward rotation having phase delay from its detection signal 15 and turns on the TRIAC 2 for forward rotation and the commercial power source 1 is impressed to a motor 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine for performing a washing operation and a dewatering operation in the same tub, and more particularly to controlling the rotation of the dewatering tub during the dewatering operation.

[0002]

2. Description of the Related Art As is well known, the dehydration operation in a washing machine is performed by rotating a dehydration tub at a high speed and removing the water contained in the laundry by utilizing the centrifugal force associated with the rotation. If the laundry is biased in the dehydration tank, the rotation of the dehydration tank becomes eccentric and irregular, and vibration and noise increase.

Therefore, a balancer is provided at the upper opening edge of the dehydration tank so that the dehydration tank can rotate regularly, or deviation of the laundry in the dehydration tank can be suppressed as much as possible. ， At the start of dehydration operation,
First, the dehydration tub was rotated at a low speed (so-called balance rotation) to reduce the water content of the laundry, which is a function of eccentricity, to some extent. By the way, the washing time by the above-mentioned low-speed rotation (balance rotation) in the past is generally set in advance at a rated load amount regardless of the amount of laundry or the quality of cloth.

[0004]

However, in the above-mentioned conventional dehydration operation, in order to prevent the laundry from being unevenly distributed in the dehydration tub, a long rotation speed (balance rotation) is required until high-speed dehydration. Since it took a long time, the dehydration operation time became long, and as a result, the time required for all the steps of fully automatic washing became long. In addition, when dehydration operation at high speed is suddenly performed, the amount of drainage becomes large, especially when the amount of laundry is large, which exceeds the capacity of the drain hose of the washing machine, and bubbles are generated by detergent in the drainage. By closing the air vent in the drain hole,
There was also a problem that the drainage capacity was extremely reduced. In addition, in recent years, the number of rotations in dehydration operation has become faster, and vibration due to imbalance during high-speed dehydration,
The noise is louder than before.

The present invention has been made to solve the above problems, and controls the rotation speed of the dehydration tub according to the drainage capacity of the washing machine, the unbalance resistance, and the amount of laundry to drain the water. The purpose of the present invention is to obtain a washing machine capable of eliminating the unevenness of the laundry in the dehydration tub and reducing the vibration and noise without lowering the load and lengthening the time required for all the steps of the fully automatic washing. And

[0006]

In order to achieve the above object, in the washing machine according to the present invention, the triac control means is linear until the rotation speed in the dehydration tub at the time of dehydration start reaches the high speed dehydration rotation speed. It controls the triac so that it starts up.

A washing machine according to the next invention has a laundry amount detecting means for detecting the amount of laundry in the spin-drying tub, and the triac control means sets the rotation speed in the spin-drying tub at the time of starting dehydration to a high-speed spin-drying rotation speed. Launch linearly until reaching
In addition, the triac is controlled so that the start-up time is changed according to the laundry amount detected by the laundry amount detecting means.

A washing machine according to the next invention has a laundry amount detecting means for detecting the amount of laundry in the dehydration tub, and the triac control means determines a predetermined amount according to the laundry amount detected by the laundry amount detecting means. The triac is controlled so that the dehydration tank is rotated at a constant low-speed dehydration rotation speed for the dehydration time and then rotated at a high-speed dehydration rotation speed.

The washing machine according to the next invention has a laundry amount detecting means for detecting the amount of laundry in the dehydration tub, and the triac control means determines the washing amount according to the amount of laundry detected by the laundry amount detecting means. The triac is controlled so as to change the rise time of the spin-drying speed of the water tank and the high-speed spin-drying time.

A washing machine according to the next invention has a current detecting means for detecting a current flowing through the motor, and the triac control means rotates the motor at a constant low-speed dehydration rotation speed by phase control after starting the dehydration operation. Then, based on the current value detected by the current detecting means, the triac is controlled so as to switch to the high-speed dehydration rotation speed when it is determined that the rate of change of the load current average value of the motor is equal to or less than a certain value. Is.

In the washing machine according to the next invention, after the triac control means starts the dehydration operation, the motor is rotated at a constant low speed dehydration rotation speed by the phase control so that the rate of change in the conduction angle of the phase control is equal to or less than a constant value. The triac is controlled so as to switch to the high-speed dehydration rotation speed when it is determined that there is.

In the washing machine according to the next invention, the operating time of the high speed dewatering rotation speed is determined according to the time for switching from the constant low speed dewatering rotation speed to the high speed dewatering rotation speed.

In the washing machine according to the next invention, the triac control means fully energizes the motor only for a predetermined short time when starting the dehydration operation, and the triac control means responds to the increase value of the rotation speed detected by the rotation speed detection means during that period. Then, the triac is controlled so as to raise the rotational speed linearly until it reaches the high speed after that.

[0014]

In the washing machine according to the present invention, the number of revolutions is gradually increased linearly, so that the washing machine can be dehydrated for a long time at the peak of the dehydration amount, and the dehydration process can be performed in a short time. Also, since the rotation speed gradually increases, the balancer installed on the circumference of the upper part of the dehydration tank can sufficiently correct the imbalance.

In the washing machine according to the next invention, the spin-up time of the motor is changed according to the amount of laundry in the dehydration tub to select an appropriate dehydration operation time according to the amount of laundry. If the amount of laundry is small, the dehydration operation can be finished earlier.

In the washing machine according to the next invention, the low speed rotation dewatering time is set to be short when the amount of laundry is small and long when the amount of laundry is large, based on the detected amount of laundry. It is not necessary to control the rotation speed by feedback of the number.

In the washing machine according to the next invention, the start-up time of the spin-drying speed and the high-speed spin-drying time are changed according to the detected laundry amount, so that the optimum spin-drying operation according to the laundry amount can be performed. .

In the washing machine according to the next invention, at the time when the load current of the motor decreases and there is no change (the rate of change is less than a predetermined value), the limit value of the dehydration operation at almost that speed is reached. Since it is determined that the high speed spin-drying operation is performed, the low speed spin-drying operation time can be optimized without detecting the amount of laundry.

In the washing machine according to the next invention, when the decrease of the energization angle in the phase control ceases (the change rate is less than a predetermined value), the limit value of the dehydration operation at the rotation speed is almost reached. Since the judgment is made and then the high speed dewatering operation is started, the time for the low speed dewatering operation can be optimized without detecting the amount of laundry.

In the washing machine according to the next invention, the operation time of the high-speed dehydration rotation speed is determined according to the time for switching from the constant low-speed dehydration rotation speed to the high-speed dehydration rotation speed, so that the dehydration time is optimized according to the amount of laundry. Can be converted.

In the washing machine according to the next invention, when the spin-drying operation is started, the motor is fully energized only for a predetermined short time, and the subsequent high speed is determined according to the increase value of the rotation speed detected by the rotation speed detecting means during that period. Since the rotation speed until reaching the number of rotations is set to rise linearly, the optimum dehydration time can be set according to the laundry amount and the water content of the laundry without detecting the laundry amount, and wasteful dehydration operation can be performed. Can be eliminated.

[0022]

【Example】

[Embodiment 1] (Structure of Embodiment 1) An embodiment of a washing machine according to the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a washing machine according to a first embodiment. In the figure, 1 is a commercial power source, 2 is a triac for forward rotation that controls energization of the motor to drive the motor in the forward direction, and 3 is a reverse rotation of the motor. A reverse triac for controlling energization to the motor for driving, 4 is a phase advancing capacitor for supplying a phase advancing current to the coil, 5 is an M coil (main winding) constituting the motor, and 6 is the same. The S coil (auxiliary winding) that constitutes the motor, 7 is a motor composed of the M coil 5 and the S coil 6, 7a is the main shaft of the motor 7 or the drive shaft of the dehydration tank (hereinafter referred to as shaft), and 8 is Dewatering tub of washing machine connected to shaft 7a, 9 is shaft 7 of motor 7
Rotation speed detecting means 10 connected to a for detecting the rotation speed thereof, 10 is a rotation speed detection signal detected and output by the rotation speed detecting means 9, and 11 is a triac for controlling the forward rotation triac 2 and the reverse rotation triac 3. A control circuit, 12 is a gate control signal that controls the gate of the forward rotation triac 2, 13 is a gate control signal that controls the gate of the reverse rotation triac 3, 14 is a zero cross detection circuit that detects the zero cross of the commercial power supply 1, and 15 is This is a zero-cross detection signal that is detected and output by the zero-cross detection circuit 14.

(Principle of Driving Single-Phase Induction Motor) Next, the principle of driving the single-phase induction motor will be described. In FIG. 1, when the forward rotation triac 2 is turned on by the gate control signal 12, the commercial power supply 1 is applied to the motor 7, the M coil 5 has the same phase current, and the S coil 6 has the 90 degree phase through the phase advance capacitor 4. The advanced phase-advancing current flows to generate a positive rotating magnetic field (frequency of commercial power source) from the stator (not shown), and the rotor (not shown) is rotationally driven in the positive direction.
This is the driving principle of a general single-phase induction motor. As a result, the shaft 7a of the motor 7 rotates in the forward direction, and the dehydration tub 8 is driven to rotate accordingly.

(Motor speed control by phase control method)
FIG. 2 shows an example of a phase control method for speed control of a single-phase induction motor. FIG. 2A shows a voltage waveform output from the commercial power supply 1, and 19 is a zero cross point in this voltage waveform. FIG. 2B is an example of the zero-cross detection signal 15 detected by the zero-cross detection circuit 14. In this example, the rising edge of the pulse indicates the zero-cross point. FIG. 2C shows a gate control signal 12 for the normal rotation triac 2 having a certain phase delay with respect to the zero-cross detection signal 15 shown in FIG. 2B, and when the gate control signal 12 is output. The forward rotation triac 2 is turned on and the commercial power supply 1 is applied to the motor 7. At the next zero cross of the voltage of the commercial power supply 1, the forward rotation triac 2 is turned off and the commercial power supply 1 is not applied to the motor 7. The applied voltage as shown in FIG. 2D is generated and the execution voltage applied to the motor 7 is adjusted. Such control is generally called phase control. In this phase control, the rotation speed of the motor 7 can be controlled by adjusting the voltage applied to the motor 7 according to the speed based on the rotation speed detection signal 10 detected by the speed detection means 9.

(Operation of Embodiment 1) FIG. 3 (a) shows the difference between the operation of the dehydration tank operation control according to Embodiment 1 (line 20) and the operation of the dehydration tank operation control (line 21) in the conventional apparatus. It is a graph which shows the relationship between motor rotation speed and time (t) for showing. In the first embodiment, the rotation speed of the dehydration tank 8 by the phase control described above is shown in FIG.
It is characterized in that it is linearly raised like the line 20 of (a). However, since most actual washing machines have the resonance frequency of the machine body at a high speed or lower, it is necessary to control the rotation speed corresponding to the resonance frequency so that the speed can be passed quickly. The slope of the rise of the rotation speed is set in consideration of the drainage amount (within the drainage capacity of the drainage pipe) at the time of dehydration when the laundry has the maximum capacity, and the acceleration at which bubbles do not occur. Since the rotation speed is phase-controlled by speed feedback in the circuit configuration shown in FIG. 1, a constant rotation speed can be raised regardless of the amount of laundry. Note that, in FIG. 3B, changes in the dehydration flow rate when the rotation speed is linearly increased (line 22) and changes in the dehydration flow rate when the rotation speed is increased by the conventional dehydration method (line 23). Indicates.

(Effects of Embodiment 1) Conventionally, the spin-up speed is raised by rotating at a low speed for a predetermined time to reduce the moisture contained in the laundry to some extent at this point, and to rapidly increase the speed during high-speed spin-drying. In order to prevent the drainage capacity from being exceeded by dehydration, and to eliminate unbalanced water at the time of high-speed rotation, an unbalanced state occurs and vibration /
The noise is not increased. Therefore, it was necessary to keep the low speed dewatering rotation speed low and rotate for a long time. However, according to the first embodiment, since the rotation speed gradually increases linearly, it is possible to dehydrate for a long time at the peak of the dehydration amount. This allows dehydration in a short time. Further, since the rotation speed gradually increases, it is possible to sufficiently deal with the imbalance correction by the balancer installed on the upper circumference of the dehydration tank 8, and as a result, it is possible to suppress the generation of vibration and noise.

Second Embodiment (Structure and Operation of Second Embodiment) Next, a second embodiment will be described. FIG. 4 shows the configuration of the second embodiment. In the figure, 1 to 15 are the same as those shown in FIG. In the figure, 16 is a dehydration tank 8
Numeral 17 is a laundry amount detecting means for detecting the amount of laundry in the inside, and numeral 17 is a laundry amount detecting signal for transmitting the amount of laundry detected by the laundry amount detecting means 16 to the triac control circuit 11. FIG. 5 is a graph showing the operation of the dehydration tub operation control according to the second embodiment. First, in the fully automatic washing machine, the laundry amount detection means 16 detects the amount of laundry immediately after the start of washing. After that, the amount of water and the washing time are determined according to the detected amount of laundry, and each step of fully automatic washing is performed. In the second embodiment, according to the information on the amount of laundry at the start of the dehydration operation. As shown in FIG. 5, the control is performed so that the rise time of the rotation speed is changed.

(Effect of Embodiment 2) According to Embodiment 2, when the amount of laundry is small, the dehydration operation can be finished earlier. That is, by changing the startup time of the rotation speed of the motor 7 according to the amount of laundry in the dehydration tub 8, it is possible to select an appropriate dehydration operation time according to the amount of laundry. If there is no information on the amount of laundry, the rotation speed is set in consideration of the amount of dehydration that occurs in the maximum amount of laundry in the first embodiment, and the degree of shortening of the dehydration time becomes small.

[Third Embodiment] (Operation of Third Embodiment) Next, a third embodiment will be described.
FIG. 6 is a graph showing the operation of the dehydration tub operation control according to the third embodiment. In the third embodiment, the laundry amount detection signal 17 from the laundry amount detection means 16 in the hardware configuration shown in FIG. Based on this, the triac control circuit 11 sets the low speed rotation dehydration time to be short when the amount of laundry is small and long when the amount of laundry is large.

(Effects of Third Embodiment) According to the third embodiment, there is an advantage that it is not necessary to detect the rotation speed in the low speed rotation dehydration operation. When the gate control signal shown in FIG. 2 (e) is output to the forward rotation triac 2 with respect to the waveform of the commercial power supply shown in FIG. 2 (a), the voltage shown in FIG. It is applied, and the frequency of about 1/3 of the commercial power supply is applied to the motor 7, and the rotation speed of the motor 7 also becomes low. In this system, the rotation speed control by feedback of the rotation speed is not necessary in the dehydration operation.

Fourth Embodiment (Operation of Fourth Embodiment) Next, a fourth embodiment will be described.
FIG. 7 is a graph showing the operation of the dehydration tub operation control according to the fourth embodiment. In the fourth embodiment, according to the laundry amount detected by the laundry amount detecting means 16 in the hardware configuration shown in FIG. It is characterized in that the start-up time of the spin-drying speed and the high-speed spin-off time are changed.

(Effect of Embodiment 4) When the amount of laundry in the dewatering tub 8 is small, the amount of dewatering is small. Therefore, not only the time for starting the dewatering rotation speed but also the time for high-speed dewatering operation may be shortened. The opposite is true when the amount of laundry is large. That is, according to the fourth embodiment, by setting the rotation speed start-up time and the high-speed dewatering time according to the laundry amount detection capability, the optimum dewatering operation according to the laundry amount can be performed. .

[Embodiment 5] (Structure of Embodiment 5) Next, Embodiment 5 will be described.
FIG. 8 is an explanatory diagram showing a hardware configuration of the fifth embodiment. In the figure, 1 to 15 are the same as those shown in FIG. Further, in the figure, 25 is a current detecting means for detecting the current flowing through the motor 7, and 26 is a current detecting signal for transmitting the current value detected by the current detecting means 25 to the triac control circuit.

(Operation of Fifth Embodiment) FIG. 9 is a graph showing the operation of the dehydration tank operation control according to the fifth embodiment.
As shown in (a), the effective value of the current flowing through the motor 7 is shown in FIG.
As shown in (b), a large current including the starting current initially flows, but the load current rapidly decreases when the rotation speed reaches a predetermined low speed rotation. After that, the dehydration operation removes the water contained in the laundry, so that the load current of the motor 7 is further reduced. That is, in the fifth embodiment, when the load current of the motor decreases and there is no change (the rate of change is equal to or less than the predetermined value), the limit value of the dehydration operation at the rotation speed is almost reached. It is possible to judge that, and after that, shift to high-speed dehydration operation.

(Effect of Embodiment 5) According to Embodiment 5, the low speed dehydration time can be optimized without the laundry amount detecting means 16 shown in FIG. In addition, the laundry amount detection cannot accurately grasp the water content of the laundry, but in this method, since the dehydration amount is substantially detected, it is possible to further optimize the dehydration time. ， It is possible to achieve dehydration in a short time without wasteful dehydration operation.

[Sixth Embodiment] (Definition of Energization Angle) Next, a sixth embodiment will be described. FIG. 11 is a graph showing the operation of the dehydration tank operation control according to the sixth embodiment. FIG. 10 defines the conduction angle in the phase control. The shaded area on the right side from the zero cross of the commercial power supply is the motor by the phase control. 7 indicates that a voltage is applied, and the length of this shaded portion is called the conduction angle. The energization angle is large when the amount of laundry is large and consequently the load of the motor is large, and is small when the amount of laundry is small and the load of the motor is small.

(Operation of the Sixth Embodiment) As shown in FIG. 11A, when the low-speed dehydration rotation is performed by the phase control after the dehydration operation is started, as shown in FIG. The maximum energization angle is 180 ° because it starts up to rotation
However, when the number of rotations reaches low-speed spin-drying rotation, the motor load becomes lighter and the conduction angle becomes smaller. After that, the water contained in the laundry is removed by the dehydration process, and the load on the motor 7 is further reduced, so that the energization angle for continuing the low speed dehydration rotation is further reduced. In the sixth embodiment, when the decrease of the energization angle in the phase control ceases (the rate of change is less than or equal to a predetermined value), it can be determined that the limit value of the dehydration operation at the rotational speed is almost reached. It is possible to do this, and then to shift to high-speed dehydration operation.

(Effect of Sixth Embodiment) According to the sixth embodiment, the time of the low speed dewatering operation can be optimized without the laundry amount detecting means 10 shown in FIG. In addition, the laundry amount detection cannot accurately grasp the water content of the laundry, but with this method, the dehydration amount is substantially detected, so that the dehydration time can be further optimized. ， Wasteful dehydration can be eliminated and short-time dehydration can be achieved.

[Seventh Embodiment] (Operation of Seventh Embodiment) Next, a seventh embodiment will be described.
FIG. 12 is a graph showing the operation of the dehydration tub operation control according to the seventh embodiment, where the time from switching to low speed dehydration to high speed dehydration is t1 when the amount of laundry is small and t2 when the amount of laundry is large. , T1 <t2 holds.
The high-speed dehydration time is, for example, α of the time required for the low-speed dehydration.
It is set twice and t1 × when the amount of laundry is small
When α and the amount of laundry are large, high-speed dewatering is performed for a time of t2 × α. In the seventh embodiment, the constant low-speed dewatering rotation speed is switched to the high-speed dewatering rotation speed in the fifth and sixth embodiments. It is characterized in that the operating time of the high-speed dehydration rotation speed is determined according to the time.

(Effect of Embodiment 7) According to Embodiment 7, the operating time of the high-speed dehydration rotation speed is determined according to the time for switching from the constant low-speed dehydration rotation speed to the high-speed dehydration rotation speed.
The dehydration time can be optimized according to the amount of laundry.

[Embodiment 8] (Operation of Embodiment 8) Next, Embodiment 8 will be described.
FIG. 13 is a graph showing the operation of the dehydration tank operation control according to the eighth embodiment. The motor 7 is fully energized for a predetermined time a seconds after the dehydration operation is started. Even when the motor 7 rotates the dehydration tub 8 by full energization, the inertia changes depending on the amount of laundry and the water content contained in the laundry at the rise of the rotation speed in a predetermined time a second, and therefore there is a difference. When the amount of laundry is large, the number of rotations is small, and when the amount of laundry is small, the number of rotations is large. In Example 8, the rotation speed b (rpm) after the a second was measured and the high-speed dehydration start-up time c seconds was calculated by, for example, c = b × α (second) (α is a predetermined coefficient) It is characterized in that the rotational speed is linearly raised along the determined start-up time. And high-speed dehydration time d
Is also determined to be d = b × β (second) (β is a predetermined coefficient) from the rotation speed b after a second, and the dehydration operation is performed in the determined high-speed dehydration time. Further, the high-speed dehydration start-up time c and the high-speed dehydration lowering time d may be set stepwise with respect to the rotation speed b after a second.

(Effect of Embodiment 8) According to Embodiment 8, when the dehydration operation is started, the motor is fully energized for a predetermined short time.
The rotation speed until the subsequent high-speed rotation speed is reached is linearly raised according to the increase value of the rotation speed detected by the rotation speed detection means in the meantime. The optimum dehydration time can be set according to the amount of water and the water content of the laundry, and wasteful dehydration can be eliminated to achieve short-time dehydration.

[0043]

As described above, in the washing machine according to the present invention, since the number of revolutions is gradually increased linearly, it can be dehydrated for a long time at the peak of dehydration amount, and dehydration processing can be performed in a short time. In addition, since the rotation speed gradually increases, it is possible to sufficiently deal with the imbalance correction by the balancer installed on the upper circumference of the dehydration tank, and it is possible to suppress the generation of vibration and noise.

Since the washing machine according to the next invention changes the start-up time of the rotation speed of the motor according to the amount of laundry in the dehydration tub, it is necessary to select an appropriate dehydration operation time depending on the amount of laundry. When the amount of laundry is small, the dehydration operation can be finished earlier and the dehydration time can be shortened.

In the washing machine according to the next invention, the low speed rotation dehydration time is set to be short when the amount of laundry is small and long when the amount of laundry is large. The rotation speed control by the number feedback is not necessary, and the low speed dehydration time can be shortened.

In the washing machine according to the next invention, since the start-up time of the spin-drying speed and the high-speed spin-off time are changed according to the detected laundry amount, the optimum spin-drying operation according to the laundry amount can be performed. The dehydration time can be shortened.

In the washing machine according to the next invention, when the load current of the motor decreases and there is no change (the rate of change is less than or equal to a predetermined value), the limit value of the dehydration operation at the rotation speed is almost reached. Since it is determined that the high-speed dehydration operation is performed, the low-speed dehydration operation time can be optimized without detecting the amount of laundry, and the overall dehydration time can be shortened.

In the washing machine according to the next invention, when the decrease of the energization angle in the phase control ceases (the rate of change is less than a predetermined value), the limit value of the dehydration operation at almost that speed is reached. Since the judgment is made and then the high speed dewatering operation is performed, the time of the low speed dewatering operation can be optimized without detecting the amount of laundry, and the overall dewatering time can be shortened.

In the washing machine according to the next invention, the operating time of the high-speed dehydration rotation speed is determined according to the time for switching from the constant low-speed dehydration rotation speed to the high-speed dehydration rotation speed, so that the dehydration time is optimized according to the amount of laundry. It is possible to reduce the total dehydration time.

In the washing machine according to the next invention, when the dehydration operation is started, the motor is fully energized only for a predetermined short time, and the high speed after that is determined according to the increase value of the rotation speed detected by the rotation speed detecting means during that period. Since the rotation speed until reaching the number of rotations is set to rise linearly, the optimum dehydration time can be set according to the laundry amount and the water content of the laundry without detecting the laundry amount, eliminating wasteful dehydration operation. it can.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a hardware configuration of a washing machine according to a first embodiment.

FIG. 2 is a timing chart showing a phase control method for controlling the speed of a single-phase induction motor.

FIG. 3 is a graph showing the operation of dehydration tank operation control according to the first embodiment.

FIG. 4 is an explanatory diagram showing a hardware configuration of a washing machine according to a second embodiment, a third embodiment and a fourth embodiment.

FIG. 5 is a graph showing the operation of dehydration tank operation control according to the second embodiment.

FIG. 6 is a graph showing the operation of dehydration tank operation control according to the third embodiment.

FIG. 7 is a graph showing the operation of dehydration tank operation control according to the fourth embodiment.

FIG. 8 is an explanatory diagram showing a hardware configuration of the washing machine according to the fifth and sixth embodiments.

FIG. 9 is a graph showing the operation of dehydration tank operation control according to the fifth embodiment.

FIG. 10 is an explanatory diagram showing conduction angles in phase control.

FIG. 11 is a graph showing the operation of dehydration tank operation control according to the sixth embodiment.

FIG. 12 is a graph showing the operation of dehydration tank operation control according to the seventh embodiment.

FIG. 13 is an explanatory diagram showing an operation of dehydration tank operation control according to the eighth embodiment.

[Explanation of symbols]

1 commercial power supply, 2 forward rotation triac, 3 reverse rotation triac, 4-phase capacitor, 5 M coil (main winding), 6 S coil (auxiliary winding), 7 motor, 8 dehydration tank, 9 rotational speed detection means, 10 rotation speed detection signal, 11 triac control circuit, 12 gate control signal, 13 gate control signal, 14 zero cross detection circuit, 15 zero cross detection signal, 16 laundry amount detection means, 17 laundry amount detection signal, 25 current detection means, 2
6 Current detection signal

Claims (8)

[Claims] 1. A forward rotation triac and a reverse rotation triac, which are connected to one end of a commercial power source and control energization of a motor having a main winding and an auxiliary winding, and a triac control which controls the forward rotation triac and the reverse rotation triac. Means, a phase advancing capacitor connected between the output end of the forward rotation triac and the output end of the reverse rotation triac, rotation speed detection means for detecting the rotation speed of the motor, and zero crossing of the commercial power supply. And a zero-crossing detecting means for detecting, the one end of the main winding is connected to the output end of the forward rotation triac, and the one end of the auxiliary winding is connected to the output end of the reverse rotation triac, And the other end of the commercial power source is connected to the other end of the auxiliary winding to control the energization of the motor. The washing machine is characterized in that the control means controls the triac so as to linearly raise the rotation speed in the dehydration tub at the time of starting dehydration until it reaches the high-speed dehydration rotation speed. 2. A forward rotation triac and a reverse rotation triac, which are connected to one end of a commercial power source and control energization to a motor having a main winding and an auxiliary winding, and a triac control which controls the forward rotation triac and the reverse rotation triac. Means, a phase advancing capacitor connected between the output end of the forward rotation triac and the output end of the reverse rotation triac, rotation speed detection means for detecting the rotation speed of the motor, and zero crossing of the commercial power supply. And a zero-crossing detecting means for detecting, and one end of the main winding is connected to the output end of the normal rotation triac, and one end of an auxiliary winding is connected to the output end of the reverse rotation triac. Connect the other end of the commercial power supply to the other end of the wire,
In the washing machine for controlling the power supply to the motor, the washing machine has a laundry amount detecting means for detecting an amount of laundry in the dehydration tub, and the triac control means sets the rotation speed in the dehydration tub at the time of starting dehydration to a high-speed dehydration rotation speed. The washing machine is characterized in that the triac is controlled so as to start up linearly until reaching, and to control the start-up time so as to change the start-up time according to the laundry amount detected by the laundry amount detecting means. 3. A forward rotation triac and a reverse rotation triac, which are connected to one end of a commercial power source and control energization of a motor having a main winding and an auxiliary winding, and a triac control which controls the forward rotation triac and the reverse rotation triac. Means, a phase advancing capacitor connected between the output end of the forward rotation triac and the output end of the reverse rotation triac, rotation speed detection means for detecting the rotation speed of the motor, and zero crossing of the commercial power supply. And a zero-crossing detecting means for detecting, and one end of the main winding is connected to the output end of the normal rotation triac, and one end of an auxiliary winding is connected to the output end of the reverse rotation triac. Connect the other end of the commercial power supply to the other end of the wire,
The washing machine for controlling the energization of the motor has a laundry amount detecting means for detecting the amount of laundry in the dehydration tub, and the triac control means determines a predetermined amount of laundry according to the laundry amount detected by the laundry amount detecting means. A washing machine characterized in that the triac is controlled so as to rotate the dehydration tank at a constant low speed dehydration rotation speed for a dehydration time and then rotate at a high speed dehydration rotation speed. 4. A forward rotation triac and a reverse rotation triac, which are connected to one end of a commercial power source and control energization to a motor having a main winding and an auxiliary winding, and a triac control which controls the forward rotation triac and the reverse rotation triac. Means, a phase advancing capacitor connected between the output end of the forward rotation triac and the output end of the reverse rotation triac, rotation speed detection means for detecting the rotation speed of the motor, and zero crossing of the commercial power supply. And a zero-crossing detecting means for detecting, and one end of the main winding is connected to the output end of the normal rotation triac, and one end of an auxiliary winding is connected to the output end of the reverse rotation triac. Connect the other end of the commercial power supply to the other end of the wire,
The washing machine for controlling the energization of the motor has a laundry amount detecting means for detecting the amount of laundry in the dehydration tub, and the TRIAC control means is adapted to remove the laundry according to the laundry amount detected by the laundry amount detecting means. A washing machine characterized in that the triac is controlled so as to change a startup time of a spin-drying speed of a water tank and a high-speed spin-down time. 5. A forward rotation triac and a reverse rotation triac, which are connected to one end of a commercial power source and control energization to a motor having a main winding and an auxiliary winding, and a triac control which controls the forward rotation triac and the reverse rotation triac. Means, a phase advancing capacitor connected between the output end of the forward rotation triac and the output end of the reverse rotation triac, rotation speed detection means for detecting the rotation speed of the motor, and zero crossing of the commercial power supply. And a zero-crossing detecting means for detecting, and one end of the main winding is connected to the output end of the normal rotation triac, and one end of an auxiliary winding is connected to the output end of the reverse rotation triac. Connect the other end of the commercial power supply to the other end of the wire,
In a washing machine for controlling energization to the motor, the washing machine has a current detection unit for detecting a current flowing through the motor,
After the dewatering operation is started, the triac control means rotates the motor at a constant low speed dewatering rotation speed by phase control, and based on the current value detected by the current detection means, changes in the load current average value of the motor. A washing machine characterized in that the triac is controlled so as to switch to a high-speed dehydration rotation speed when it is determined that the rate is equal to or lower than a certain value. 6. A forward rotation triac and a reverse rotation triac, which are connected to one end of a commercial power source and control energization of a motor having a main winding and an auxiliary winding, and a triac control which controls the forward rotation triac and the reverse rotation triac. Means, a phase advancing capacitor connected between the output end of the forward rotation triac and the output end of the reverse rotation triac, rotation speed detection means for detecting the rotation speed of the motor, and zero crossing of the commercial power supply. And a zero-crossing detecting means for detecting, and one end of the main winding is connected to the output end of the normal rotation triac, and one end of an auxiliary winding is connected to the output end of the reverse rotation triac. Connect the other end of the commercial power supply to the other end of the wire,
In the washing machine for controlling energization to the motor, the triac control means rotates the motor at a constant low speed dehydration rotation speed by phase control after the dehydration operation is started, and the rate of change in the energization angle of the phase control is below a constant value. A washing machine characterized by controlling the triac so as to switch to a high-speed dewatering rotation speed when it is determined that there is. 7. The operating time of the high speed dewatering rotation speed is determined according to the time for switching from the constant low speed dewatering rotation speed to the high speed dewatering rotation speed.
The described washing machine. 8. A forward rotation triac and a reverse rotation triac, which are connected to one end of a commercial power source and control energization to a motor having a main winding and an auxiliary winding, and a triac control which controls the forward rotation triac and the reverse rotation triac. Means, a phase advancing capacitor connected between the output end of the forward rotation triac and the output end of the reverse rotation triac, rotation speed detection means for detecting the rotation speed of the motor, and zero crossing of the commercial power supply. And a zero-crossing detecting means for detecting, and one end of the main winding is connected to the output end of the normal rotation triac, and one end of an auxiliary winding is connected to the output end of the reverse rotation triac. Connect the other end of the commercial power supply to the other end of the wire,
In the washing machine for controlling energization to the motor, the triac control means fully energizes the motor for a predetermined short time at the time of starting the dehydration operation, and the rotation speed increase value detected by the rotation speed detection means during that period. According to the above, the washing machine is characterized in that the triac is controlled so as to linearly raise the rotational speed until the high speed is reached thereafter.