JPH0984990A - Operation controller for washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of breaker interruption by an lowering applying voltage to one of motors when the total of current values made to flow to the motor for a washing tank and the motor for a pump is larger than a set current value. SOLUTION: The current values are made to flow to the motor 3 for the washing tank and the motor 4 for the pump are detected by current detectors 7, 8 and transmitted to a load power controller 10. The set current value such as 5A is stored in the load power controller 10 beforehand. Then, the total of detected current values transmitted from the current detectors 7 and 8 is obtained and compared with the set current value. Signals for lowering an output voltage are sent to a power source device 6 when the total current value is larger than the set current value. Thus, the applying voltage to the motor 4 for the pump is reduced, the current made to flow to the motor 4 for the pump is reduced and the total current value is controlled to be lower than the set current value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing tub motor for rotating a washing tub, a pump motor for rotating a pump for injecting a washing liquid into the laundry in the washing tub, and a power source for controlling the applied voltage to the pump motor. The present invention relates to a washing machine having a device, and particularly to an operation control device and a circuit configuration thereof.

[0002]

2. Description of the Related Art Most conventional washing methods for washing machines utilize a water flow generated by the rotation of a stirring blade.
Recently, for the purpose of further improving the cleaning performance and reducing the amount of washing water used, a jet washing type washing machine is proposed, in which the washing tub is rotated instead of the agitating blade, and the jet cleaning liquid from the pump is sprayed directly onto the laundry. Has been done.

This jet washing type washing machine sprays a jet cleaning liquid directly onto the laundry and washes it by its osmotic force. At the same time, the washing tub is washed for the purpose of spraying the cleaning liquid evenly over the entire surface of the laundry. The clothes are quickly reversed so that the laundry can be spread.

[0004]

SUMMARY OF THE INVENTION In a jet washing type washing machine using a washing tub motor for rotating a washing tub and a pump motor for rotating a pump for injecting a washing liquid into the laundry in the washing tub, a stirring blade is used. There is a peculiar problem that is different from the conventional washing machine using only the motor for use.

First, there is a problem of power consumption of a washing machine, that is, a current value of a motor. In a conventional washing machine using only a stirring blade, a special means is required to control the current value to a predetermined value or less. However, in the case of this method, for example, focusing on the required drive torque of the washing tub motor, since the weight of the washing tub is generally heavier than the stirring wing, the washing tub motor is much larger than the stirring wing motor. A large drive torque is required, and particularly when starting or reversing the drive torque, a large amount of current is required to generate this drive torque. Therefore, the current values flowing through the washing tub motor and the pump motor, respectively. There is a problem that the total of the above exceeds the breaker capacity and the breaker shuts off.

Next, as an advantage of this method, it is possible to wash with a smaller amount of washing water used than the conventional stirring method. However, if the amount of water is excessively reduced, air will be supplied to the pump for injecting the washing liquid. There is a problem that the cleaning liquid is not sprayed smoothly due to the mixing and the cleaning effect is deteriorated, and also an abnormal sound is generated from the spray port due to the spray of air.

Next, in this system, there are at least two motors that require rotation control, and each requires a power supply device that controls the voltage applied to these motors, which increases the cost compared to the conventional stirring-type washing machine. Becomes

[0008] Finally, in order to improve the detergency which is the purpose of this system, the laundry is diffused by rapidly reversing the washing tub, but when the gentle reversing operation is repeated, the laundry in the washing tub is entangled with each other. The rapid reversal operation must be performed from the beginning of the reversal mode because it becomes a dumpling state and the original diffusion becomes more difficult. In order to realize this, it is necessary to recognize the weight of the laundry in the washing tub and apply a voltage to the washing tub motor in order to generate a torque according to the weight.

The present invention firstly provides an operation control device for a jet washing type washing machine capable of supplying a current required by the washing tub motor and the pump motor and preventing the problem of breaker interruption. The first purpose is to do so.

Next, it is an object of the present invention to provide an operation control device for a jet washing type washing machine having a function of preventing air from being mixed into a pump for injecting a washing liquid, which causes a reduction in washing power and an abnormal noise. The purpose is 2.

A third object of the present invention is to provide a jet washing type washing machine which is less costly than the conventional stirring type washing machine.

A fourth object of the present invention is to provide a jet washing type washing machine operation control device capable of rotating the washing tub according to the weight of the laundry in the washing tub in order to improve the washing power. To do.

[0013]

In order to achieve the above object, according to the present invention, a washing tub motor for rotating a washing tub and a pump motor for rotating a pump for injecting a washing liquid into the laundry in the washing tub are respectively provided. A current detector is installed in the motor to detect the value of current flowing through the washing tub motor and the pump motor, and if the sum of the current values is larger than a preset current value, the washing tub motor or the pump Reduce the voltage applied to either of the motors. This makes it possible to control so that the total of the current values becomes smaller than the set current value.

Further, at the time of starting the washing tub operation or reversing, the electric power supplied to the pump motor is temporarily reduced.
By this, the electric power is preferentially supplied to the washing tub motor to generate a large torque required by the washing tub motor, and the total current value flowing through the washing tub motor and the pump motor is set. It can be controlled so that the current value is not exceeded.

Further, when the value of the current flowing through the pump motor becomes smaller than the preset current value with respect to the value of the current flowing through the pump motor, air is mixed into the pump for injecting the cleaning liquid and the pump becomes idle. As an example, the automatic water supply valve provided in the washing machine is opened to supply water to the washing tub to increase the amount of water. This eliminates the entry of air into the pump. On the contrary, when the current value flowing in the pump motor becomes larger than another current value set in advance with respect to the current value flowing in the pump motor, it is considered that the mixing of air into the pump is eliminated, and the automatic water supply valve Close and stop supplying water to the wash tub. As described above, the washing tub can be controlled so as to always keep the minimum amount of water used so that air is not mixed in the pump.

Further, the cleaning performance of the jet cleaning system is mainly determined by the penetrating force of the cleaning liquid sprayed on the laundry into the laundry, and the motor for the washing tub and the motor for the pump are always driven at the same time. No need.
Therefore, electric power is alternately supplied to the washing tub motor and the pump motor to drive only one of the washing tub motor and the pump motor. This makes it possible to reduce the current value, and further, by providing a switching device for selecting the washing tub motor and the pump motor, it is possible to use only one power supply device. It is possible to prevent cost increase compared to other washing machines.

Further, when the washing tub is operated, the maximum value of the current flowing through the washing tub motor is detected in the operation mode, and the motor for the washing tub is selected in accordance with the maximum current value at the next reversal of the washing tub. Determine the voltage to apply. This makes it possible to generate a detergency corresponding to the weight of the laundry in the washing tub.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an example of a circuit block diagram of an operation control device for a washing machine of the present invention, in which 1 is a commercial AC power supply and 2
Is a smoothing circuit, 3 is a washing tub motor for rotating the washing tub,
Reference numeral 4 is a pump motor for rotating a pump for injecting washing liquid into the laundry in the washing tub, 5 is a power supply device for applying a voltage to the washing tub motor 3, 6 is a power supply device for applying a voltage to the pump motor, 7 Is a current detector connected to the power supply device 5,
Reference numeral 8 is a current detector connected to the power supply device 6, 9 is an automatic water supply valve for supplying tap water to the washing tub, and 10 is current detectors 7, 8
It is a load power control device that receives a detection signal from the power supply device 5 and 6 and sends a control signal to the automatic water supply valve 9.

The AC current from the commercial AC power source 1 is rectified and smoothed by the smoothing circuit 2 to become a DC current, one of which is through the power supply device 5 to the washing tub motor 3 and the other through the power supply device 6. It is supplied to the pump motor 4.
The current detectors 7 and 8 are used for the washing tub motor 3 respectively.
The current value flowing through the pump motor 4 and the current value flowing through the pump motor 4 are detected, and a signal corresponding to the detected current value is transmitted to the load power control device 10. The load power control device 10 that has received the signals from the current detectors 7 and 8 transmits a control signal corresponding to the received signals to the power supply devices 5 and 6 and the automatic water supply valve 9 to cause the power supply devices 5 and 6 to operate. Output voltage and automatic water supply valve 9
Control the opening and closing of

Here, the load power control device 10 includes:
A preset current value of, for example, 5 A is stored in advance, and the load power control device 1 is operated by signals from the current detectors 7 and 8.
When 0 recognizes that the sum of the current values flowing in the washing tub motor 3 and the pump motor 4 exceeds the set current value 5A, the load power control device 10 sends a signal to the power supply device 6 to lower its output voltage, for example. By transmitting, the voltage applied to the pump motor 4 is reduced, and as a result, the current flowing through the pump motor 4 is reduced. Therefore, the sum of the current values flowing through the washing tub motor 3 and the pump motor 4 is set. The current value is controlled to 5 A or less.

FIG. 2 shows an example of the operation sequence of the washing tub and the pump, and the washing tub motor 3 and the pump motor 4 at that time.
1 represents a current flowing through the load tub, and at the time of starting and reversing the washing tub operation, a signal whose output voltage is 0 is transmitted from the load power control device 10 to the power supply device 6 in FIG. It does not drive and the pump does not run (turns off).

On the other hand, when the set current value stored in the load power control device 10 is, for example, 5 A, the power supply device 5 is
A signal is transmitted from the load power control device 10 and its output voltage is controlled so that all the current of 5 A flows to the washing tub motor 3. And, after starting the washing tub operation and after reversing,
Since the current required by the washing tub motor 3 is smaller than that at the time of starting and reversing the washing tub operation, the voltage is applied to the pump motor 4 so that the current flows to the pump motor 4, and the pump is also driven. Come to do.

In the present embodiment, the pump motor 4 is not driven at the time of starting and reversing the washing tub, but it is not always necessary to do so and it is not necessary to do so. If the sum of the current values supplied to the washing tub motor 3 to the washing tub motor 3 and the current values flowing through the washing tub motor 3 and the pump motor 4 is less than or equal to the set current value, the pump motor 4 It is also possible to drive.

In FIG. 3, 11 is a washing tub, 12 is a pump for injecting a washing liquid into the laundry in the washing tub, 13 is a washing liquid injection port, and the automatic water supply valve 9, the washing tub 11 and the pump 12 are shown.
2 shows an example of the positional relationship between the cleaning liquid injection port 13 and the cleaning liquid injection port 13, and the water supplied from the automatic water supply valve 9 to the washing tub 11 is pump 12
Thus, the cleaning liquid is jetted from the washing liquid jet port 13 to the washing tub 11 and circulated.

Here, when the amount of circulating water in the pump 12 is too small, the load applied to the pump motor 4 in FIG. 1 is small, and therefore the current flowing through the pump motor 4 is small, but the load power control in FIG. When the current is smaller than the determination current level 2 shown in FIG. 4, which is the current value preset in the load power control device 10, the device 10 determines that air is mixed in the pump 12, and opens the automatic water supply valve 9. To control.

As a result, water is supplied from the automatic water supply valve 9 to the washing tub 11, the amount of circulating water in the pump 12 increases, and the load on the pump motor 4 increases, so that the current flowing through the pump motor 4 also increases. growing. Therefore, when the current becomes larger than the determination current level 1 shown in FIG. 4, which is another current value preset in the load power control device 10, the load power control device 10 eliminates the air mixed in the pump. Control to close the automatic water supply valve 9,
The supply of water to the washing tub 11 is stopped.

After that, even if the amount of water in the washing tub 11 decreases again for some reason and the amount of circulating water in the pump 12 becomes too small, the automatic water supply valve 9 is controlled in the above procedure. As described above, the automatic water supply valve 9 is controlled so as to always keep the minimum amount of water in which air is not mixed in the pump, and its operating state is shown in FIG.

FIG. 5 shows another embodiment of the power supply path to the motor, where 14 is the power supply device, and 15 is the output voltage of the power supply device 14, either the washing tub motor 3 or the pump motor 4. It is a switching device that is applied to one side, and is provided between the washing tub motor 3, the pump motor 4 and the power supply device 14.

With this circuit configuration,
By alternately supplying electric power to the washing tub motor 3 and the pump motor 4, and driving only one of the washing motor 3 and the pump motor 4, the current value can be lowered. Further, by providing the switching device 15 as in the present embodiment, it is possible to use only one power supply device.

FIG. 6 shows a control sequence of the applied voltage to the washing tub motor 3 at the time of starting the washing tub operation and the next reversal, and the current flowing through the washing tub motor 3 at the time of starting the washing tub operation. It is a representation. First, at the time of starting the washing tub operation, in FIG. 1, a signal is transmitted from the load power control device 10 to the power supply device 5 so that the output voltage thereof has a certain constant value, and the washing tub is operated for a certain period at the voltage.

During this period, the current flowing through the washing tub motor 3 has a waveform having a maximum value when the washing tub starts rotating, as shown in FIG. 6, and the load power controller 10 stores the maximum current value. Here, since the maximum current value has a characteristic of increasing in proportion to the weight of the laundry in the washing tub as shown in FIG. 7, the measurement of the maximum current value indicates the weight of the laundry in the washing tub. It will be measured.

Therefore, the load power control device 10 is provided with the function of determining the voltage to be applied to the washing tub motor 3 at the time of the next washing tub reversal according to the maximum current value, and the output voltage of the power supply device 5 is set. For example, when the maximum current value is IP1, it is VP1, when it is IP2, it is VP2, and when it is IP3, it is V.
If the control signal P3 is transmitted from the load power control device 10 to the power supply device 5, a voltage proportional to the weight of the laundry in the washing tub is applied to the washing tub motor 3.

[0033]

According to the first aspect of the present invention, there is a total of currents flowing through the washing tub motor for rotating the washing tub and the pump motor for rotating the pump for injecting the washing liquid into the laundry in the washing tub. It is controlled so as to be equal to or less than the value, and the breaker interruption can be prevented by setting the set value to a value slightly smaller than the capacity of the breaker.

According to the second aspect of the present invention, at the time of starting and reversing the operation of the washing tub, the voltage applied to the pump motor is lowered so that the washing motor is preferentially supplied to the washing motor by the pump motor. It is possible to supply a large amount of torque required by the washing tub motor and to prevent the total current value of the washing tub motor and the pump motor from exceeding the set current value.

According to the third aspect of the present invention, the amount of water in the washing tub is controlled by opening and closing the automatic water supply valve provided in the washing tub, and air is mixed into the pump to reduce the cleaning power, or the amount of mixed air is reduced. It is possible to prevent generation of abnormal noise due to injection.

According to the present invention, the electric power is alternately supplied to the washing tub motor and the pump motor, and only one of the washing tub motor and the pump motor is driven. , The current value can be lowered. Further, it is possible to share a single power supply device for outputting a voltage applied to the washing tub motor and the pump motor, thereby preventing an increase in cost as compared with a conventional washing-type washing machine. it can.

According to the fifth aspect, by applying a voltage according to the weight of the laundry in the laundry tub to the motor for the laundry tub, a detergency suitable for the weight of the laundry in the laundry tub can be obtained. You can

[Brief description of drawings]

FIG. 1 is a circuit block diagram of an operation control device of a washing machine.

FIG. 2 is a diagram showing an operation sequence of a washing tub and a pump and currents flowing through the washing tub motor and the pump motor at that time.

FIG. 3 is a diagram showing a positional relationship between an automatic water supply valve, a washing tub, a pump for injecting cleaning liquid, and a cleaning liquid injection port.

FIG. 4 is a diagram showing a relationship between an electric current flowing through a pump motor and an operating state of an automatic water supply valve.

FIG. 5 is a circuit block diagram of an operation control device of a washing machine that alternately supplies electric power to a washing tub motor and a pump motor.

FIG. 6 is a diagram showing a voltage sequence applied to the washing tub motor at the time of starting the washing tub operation and the next reversal, and a current flowing through the washing tub motor at the time of starting the washing tub operation.

7 is a diagram showing the relationship between the maximum value of the current flowing through the washing tub motor in FIG. 6 and the weight of the laundry in the washing tub.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Commercial AC power supply 2 Smoothing circuit 3 Motor for washing tub which rotates a washing tub 4 Motor for pump which rotates a pump which injects washing liquid into the laundry in the washing tub 5 Power supply device 6 which applies a voltage to the motor for washing tub 6 Pump Power supply device for applying voltage to the motor for washing machine 7 Current detector connected to power supply device for applying voltage to the washing tub motor 8 Current detector connected to power supply device for applying voltage to the pump motor 9 Automatic water supply valve 10 load power control device 11 washing tub 12 pump for injecting a cleaning liquid onto the laundry in the washing tub 13 cleaning liquid injection port 14 power supply device 15 switching device

Claims (5)

[Claims] 1. A washing tub motor for rotating a washing tub,
A first power supply device that controls an applied voltage to the washing tub motor, a pump motor that rotates a pump that injects a cleaning liquid into the laundry in the washing tub, and an applied voltage to the pump motor. In a washing machine having a second power supply device, a current detector for detecting a current value flowing in each of the washing tub motor and the pump motor is provided, and the total of the current values is larger than a preset current value. If
An operation control device for a washing machine, which lowers a voltage applied to either the washing tub motor or the pump motor. 2. The operation control device for a washing machine according to claim 1, wherein the applied voltage to the pump motor is lowered at the time of starting and reversing the operation of the washing tub. 3. A washing machine is provided with an automatic water supply valve, which opens the automatic water supply valve when a current value flowing through the pump motor becomes smaller than a preset current value, and the current value flowing through the pump motor is reduced. The operation control device for a washing machine according to claim 1, wherein the automatic water supply valve is closed when the current value becomes larger than another preset current value. 4. A washing machine having a washing tub motor for rotating a washing tub and a pump motor for rotating a pump for injecting a washing liquid into the laundry in the washing tub, comprising: An operation control device for a washing machine, characterized in that electric power is alternately supplied to a motor. 5. An operation control device for a washing machine, wherein a washing tub motor is rotated to wash a washing tub, wherein a maximum current flowing through the washing tub motor in a washing tub operation is in the operation mode. An operation control device for a washing machine, which detects a value and determines a voltage to be applied to the washing tub motor at the next time of reversing the washing tub based on the maximum current value.