JPS61234894A - Control of 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] (Industrial application field) The present invention relates to a method for controlling a washing machine.

(Prior art and its problems) Cloth tangles have long been a problem in washing machines, so recently there have been new washing machines that shorten the Pal Tanabata reversal cycle and create a water flow that reduces cloth tangles. Although it has been commercialized, the reversal cycle of the pulsator cannot be extremely shortened from the viewpoint of cleaning performance, and at present it has not reached the point where it can eliminate tangles of cloth.

(Object of the Invention) The present invention has been made in view of the above points, and it is an object of the present invention to provide a method for controlling a washing machine that can improve cloth tangling while maintaining high cleaning performance.

(Method of the Invention) The present invention provides that after stirring by the main water stream for the purpose of cleaning,
By automatically performing agitation with a finishing water stream for the purpose of loosening the cloth, which is weaker than the main water stream, and increasing or decreasing the agitation time with the finishing water stream depending on the length of the agitation time with the main water stream, It accomplishes the intended purpose.

(Example) Examples of the present invention shown in the drawings will be described in detail below.

FIG. 1 is a block diagram showing a control circuit of a washing machine in an embodiment of the present invention. In FIG. 1, l is an electronic control circuit, which basically consists of an electronic timer 2, an arithmetic processing unit (CPU) 3, a clock control circuit 4,
Memory 5, input vanofa control circuit 6,
and an out buffer control circuit 7.

8 is a power switch; 9 is a key power section including a time setting key for setting the washing time (stirring time), a start key, etc.; 10 is a motor for rotating the pulsator; 1
1 is a display LED.

The CPU 3 reads the state of the key power unit 9 via the input buffer control circuit 6, reads the control program contents from the memory 5, and controls the motor 101 display LEDI+ etc. according to the contents of the output buffer control circuit. 7 gives a signal to the switching element to control it.

Next, the control will be explained with reference to the flowchart shown in FIG.

First, after turning on the power switch 8, set the washing time (15 minutes, 10 minutes, or 5 minutes) using the time setting key, and then turn on the start key. Then, after determining which washing time has been set, the washing operation is executed by reading out the control program contents corresponding to the washing time.

If the washing time is currently set to 10 minutes, the main water flow operation is performed for 9 minutes from the start of washing, and then the finishing water flow operation is performed for 1 minute. In the main water flow operation, the motor 10 is driven in left-right reversal at a cycle of 1.4 seconds ON and 0.6 seconds OFF, so that a pulsator generates a so-called main water flow for the purpose of washing, and washes the laundry. Finishing water flow operation is 0.
By driving the motor 10 in a left-right reversal cycle with a cycle of 8 seconds ON and 1.6 seconds OFF, a pulsator creates a finishing main flow that is weaker than the above-mentioned main water flow, and this finishing water flow loosens the laundry and eliminates tangles in the fabric. .

Also, if the washing time is set to 15 minutes, the main water flow operation will be performed for the first 13 minutes and 30 seconds, and the finishing water flow operation will be performed for the remaining 1 minute and 30 seconds, and if the washing time is set to 5 minutes, the washing time will be , main water flow operation for the first 4 minutes and 30 seconds, and finishing water flow operation for the remaining 30 seconds.

Here, the reason why the operation time (stirring time) by the finishing water flow is increased or decreased depending on the length of the operation time (stirring time) by the main water flow as described above will be explained below.

Generally, as shown by line a in FIG. 3, the longer the operating time with the main water flow, the higher the entanglement rate of the cloth. In such a situation, if the operating time using the finishing water stream is made constant, there will be problems in that the entanglement of the cloth cannot be sufficiently cleared within that time, or on the contrary, the operation may be continued longer than necessary. For example, if the running time for the finishing water stream is set to 1 minute regardless of the washing time, if the washing time is 15 minutes, it will not be possible to sufficiently untangle the cloth, and conversely, if the washing time is 5 minutes, it will take about 30 seconds. Even though the cloth can be untangled, it continues to run for one minute, resulting in unnecessary operation. However, as in this example, by increasing or decreasing the operating time for the finishing water flow depending on the length of the operating time for the main water flow, the variation in the entanglement rate due to the length of the operating time can be reduced, as shown by b@ in Fig. 3. The tangle rate is extremely low compared to the conventional method (which does not implement finishing water flow).
It can be kept extremely small compared to the a-line). Furthermore, as shown by the line a in FIG. 4, the degree of cleaning is slightly lower than that of the conventional method (indicated by the line d) in which no finishing water flow is performed, and a sufficiently high cleaning performance can be maintained.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can of course be implemented with appropriate modifications within the scope of the invention.

(Effects of the Invention) As described above, according to the control method of the present invention, it is possible to sufficiently eliminate tangles of cloth while maintaining high cleaning performance.

[Brief Description of the Drawings] Fig. 1 is a block diagram showing a control circuit of a washing machine in an embodiment of the present invention, Fig. 2 is a flowchart, Fig. 3 is a diagram showing the relationship between operating time and tangle rate, and Fig. 4 is a diagram showing a control circuit of a washing machine in an embodiment of the present invention. The figure is a diagram showing the relationship between operating time and cleaning degree.

Claims (1)

[Claims] 1. After stirring with the main water flow for washing, automatically perform agitation with a finishing water flow that is weaker than the main water flow and aim to loosen the fabric, and adjust the finishing water flow according to the length of the stirring time with the main water flow. A method of controlling a washing machine by increasing/decreasing the agitation time.