JPH04266796A - Washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine which has been improved so as to be able to wash clothes more effectively.

0003

2. Description of the Related Art Conventionally, in washing machines, washing motors are generally rotated in forward and reverse directions during washing.

0004

However, in conventional washing machines, the water flow generated during washing is constant and monotonous no matter how many times the washing motor is rotated in forward and reverse directions. The problem was that washing could not be done effectively. In this case, even if the water flow is constant, it is generally considered that a so-called strong water flow can be generated by rotating the washing motor at a high rotational speed for a long time each time. However, this method has the drawback that the laundry gets tangled more often, resulting in poor fabric wrap, and therefore, washing cannot be carried out effectively. or,
In order to reduce the amount of laundry that gets tangled, the washing motor should be rotated briefly at a low rotation speed each time. However, this method has the disadvantage that even though the laundry becomes less tangled, it can only be flushed with water weakly, and therefore, washing cannot be carried out effectively.

The present invention has been made in view of the above-mentioned circumstances, and its object is to provide an excellent washing machine that can perform washing effectively and obtain sufficient washing effects. It is in.

[Configuration of the invention]

[0007]

[Means for Solving the Problems] In order to achieve the above object, in the washing machine of the present invention, during washing, the washing motor is rotated in forward and reverse directions in a drive mode in which the number of rotations per unit time is changed to a plurality of types by a control means. A feature of the invention is that it is controlled to

[0008]

[Function] According to the above means, the strength of the water flow changes in multiple ways during washing, allowing effective washing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, FIG. 2 shows an outer box 1 of the entire washing machine, and an outer tub 2 is disposed inside. A drive mechanism 3 is disposed in the outer lower part of the outer tub 2, and this drive mechanism 3 includes a motor that is both a washing motor and a dewatering motor, particularly a brushless DC motor 4. In addition, a drain valve 5 and a drain hose 6 are also provided at the outer lower part of the outer tank 2. Further, inside the outer tank 2, there is provided an inner tank 8 which has a large number of dewatering holes 7 on its peripheral wall and is rotationally driven by the drive mechanism 3 during dewatering. Organization 3
An agitator 9 is provided which is rotated during washing.

On the other hand, a top cover 10 is mounted on the outer box 1, and a first control device 11, which is one of the control means, is disposed inside the front part of this top cover 10, and A water supply valve 12 that supplies water to the inner tank 8 (outer tank 2) and a water level sensor 13 that detects the water level in the outer tank 2 (inner tank 8) are disposed. Further, a control box 14 is provided at the back of the top cover 10 and the outer box 1, and a second control device 15, which is another control means, is provided inside this control box 14. .

Both the first and second control devices 11 and 15
Specifically, they are all configured by a microcomputer, and as shown in FIG. The signal is input to the control device 11 of No. 1. Accordingly, the first control device 11 provides a control signal to the display section drive circuit 17 to drive and control the display section 18 according to these inputs and a control program stored in advance.
A control signal is given to the valve drive circuit 19 to drive and control the water supply valve 12 and the drain valve 5. Further, the first control device 11 is configured to give a command signal for operating the motor 4 to the second control device 15, and based on the command signal, the second control device 15 operates. The motor drive circuit 20 is configured to drive and control the motor 4 by giving control signals for driving, stopping, forward and reverse rotation, and controlling the rotational speed of the motor 4. Incidentally, the motor drive circuit 20 is constituted by an inverter circuit capable of the above-mentioned control. Further, the first control device 11 is connected to the second control device 1.
A transfer timing signal, a transfer clock signal, and a data transfer signal are also provided to the second control device 15, and a data reception signal is received from the second control device 15.

Therefore, the above-mentioned two control devices 11, 1 will be described below.
The effect based on the operation of 5 will be described with reference to FIG.

That is, when the first control device 11 starts its operation, it first receives a setting input from the switch input section 16 (step S1), and then determines whether or not the start switch has been operated. (Step S2). If it is determined that the start switch has been operated, it is then determined whether the set course is a jeans washing course (step S3), and if it is determined that the jeans washing course is selected, the water supply valve is turned on. 12 to open the inner tank 8 (
(inside the outer tank 2) (step S4), and then
The control device 15 drives the motor 4 in the first drive mode to perform washing (step S5).

[0015] In this first drive mode, the motor 4 is rotated forward and backward at a rotation speed of 110 rpm in a pattern of 3 seconds of energization and 1 second of energization to generate a strong swirling water flow, and then an intermediate water flow is generated. A pattern of 1.5 seconds energized and 0.5 seconds energized
A pattern of 1.4 seconds of energization and 0.6 seconds of energization that rotates forward and reverse at a rotation speed of 120 rpm and generates a normal water flow 11
A pattern of 1 second energization-1 second power-off that rotates forward and reverse at a rotation speed of 5 rpm to generate an intermediate water flow ・0.5 second energization that rotates forward and reverse at a rotation speed of 80 rpm and generates a weak water flow - 0 .5 second power cut pattern, forward and reverse rotation at 65 rpm, and these are repeated. Figure 4 shows the power cut-off pattern, and Figure 5 shows the water flow in the inner tank 8. are shown respectively.

On the other hand, if it is determined in step S3 that the course is not for washing jeans, then it is determined whether or not the course set is for washing lingerie (
In step S6), if it is determined that it is time to wash lingerie, water is supplied in the same manner as in step S4 (step S7), and then the second control device 15 drives the motor 4 in the second drive mode. , wash the clothes (step S8).

In this second drive mode, the motor 4 is rotated in the forward and reverse directions at a rotation speed of 110 rpm with a pattern of energization for 1.2 seconds and de-energization for 0.8 seconds to generate a normal water flow, and then Pattern of 1 second energization and 1 second power outage that generates water flow・80
A pattern of 0.5 second energization and 0.5 second energization, 60 rpm, which rotates forward and reverse at the rotation speed of rpm, and generates a weak water flow.
These steps are repeated by rotating forward and reverse at a rotation speed of
FIG. 6 shows how the current is turned on and off, and FIG. 7 shows how the water flows inside the inner tank 8.

If it is determined in step S6 that the course is not for washing lingerie, it is determined that the set course is for washing ordinary laundry, and a normal water flow is generated for 1.5 seconds. The pattern is energization and 0.6 second power cutoff, and forward and reverse rotation at a rotation speed of 110 rpm is repeated (step S9). The water flow is shown in each figure.

[0019] With this configuration, during washing, especially during the jeans washing course and the lingerie washing course, the motor 4 is rotated in forward and reverse directions in a drive mode in which the number of revolutions per unit time changes in a plurality of types. and
As a result, the strength of the water flow changes in multiple ways, so unlike conventional water flow that is constant and monotonous, the laundry does not get tangled, the fabric wraps well, and the strength of washing required for each can be obtained, making it more effective. It can be washed properly.

[0020] As mentioned above, the motor 4 is rotated forward and reverse in a drive mode in which the number of rotations per unit time changes in a plurality of types, not only in the jeans washing course and the lingerie washing course, but also in other, for example, ordinary washing courses. It may also be executed during the laundry washing cycle. In addition, in the above embodiment, the motor 4 is rotated forward and reverse in these courses by changing not only the number of revolutions per unit time but also the length of the energization time. However, this is not necessarily necessary, and only those that require it may be carried out.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings; in particular, each drive mode is determined by taking into consideration the results of detecting the quantity and quality of the laundry. Furthermore, the specific numerical values and number of combinations of each drive mode can be set as appropriate, and the embodiments can be implemented with appropriate changes within the scope of the gist.

[0022]

[Effects of the Invention] As is clear from the above description, the washing machine of the present invention uses a control means to control the washing motor to rotate in forward and reverse directions in a drive mode in which the number of revolutions per unit time changes in a plurality of types during washing. It is characterized by the fact that it allows for effective washing,
It has an excellent effect of being able to obtain a sufficient washing effect.

[Brief explanation of the drawing]

FIG. 1: Flowchart showing one embodiment of the present invention.

[Figure 2
] Vertical side view of the entire washing machine

[Figure 3] Schematic electrical configuration diagram

[Figure 4] Time chart of first drive mode

[Figure 5] Diagram showing changes in water flow in the same drive mode

[Figure 6] Time chart of second drive mode

[Figure 7] Diagram showing changes in water flow in the same drive mode

[Figure 8] Time chart of third drive mode

[Figure 9] Diagram showing changes in water flow in the same drive mode

[Explanation of symbols]

4 is a motor (washing motor), 11 is a first control device (control means), and 15 is a second control device (control means).

Claims (1)

[Claims] 1. A washing machine comprising a washing motor, and a control means for controlling the washing motor to rotate in forward and reverse directions in a drive mode in which the number of rotations per unit time changes in a plurality of types during washing. .