JPH0552238B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a combined spin-drying laundry in which, when an imbalance is detected during the spin-drying process, an unbalance correction process consisting of water supply, stirring, and drainage is performed, and the spin-drying process is repeated again. Concerning a dewatering control method for a machine.

[Technical Background of the Invention] Conventionally, in a washing machine for washing and dehydrating, which is equipped with a rotating tub for both washing and dehydrating and an agitator inside the rotating tub, abnormal vibrations of the rotating tub occur during the spin-drying process. In other words, it is designed to detect imbalance, and when imbalance is detected,
The unbalance correction process consisting of water supply, stirring, and drainage is performed, and the dewatering process is repeated again.

[Problems with the background art] However, in the above case, the unbalance correction process in the dehydration process is carried out in a uniform correction mode in which the water supply time is constant and the stirring time is also constant, so the amount of deviation of the dehydrated material in the rotating tank is is large and the unbalance correction effect in the first unbalance correction process is low, the unbalance correction effect will not be much improved in the next unbalance correction process, and the unbalance correction process will be repeated many times from the second time onward. There was a risk that the dehydration process would become excessively long.

[Object of the Invention] The present invention has been made in view of the above circumstances, and its purpose is to provide a dual-purpose dehydration system that can quickly eliminate the imbalance of the dehydrated material in the rotating tank when unbalance is detected for the second time or more. The present invention provides a method for controlling dehydration of a washing machine.

[Summary of the Invention] According to the present invention, when unbalance is detected twice or more in one dehydration process, the second and subsequent unbalance correction processes are performed in a different correction mode from the previous unbalance correction process. The present invention is characterized in that, if the previous unbalance correcting mode is not effective in correcting the imbalance of the dehydrated material, the next unbalance correcting mode is changed.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, reference numeral 1 denotes an outer box in which a water receiving tank 2 is elastically supported via a suspension mechanism 3. 4 is a rotating tank for washing and dewatering placed in the water receiving tank 2, which is operated by the motor 5 during dewatering.
It is rotated at high speed by a drive section 6 equipped with a. Reference numeral 7 denotes a container-shaped agitator disposed within the rotating tank 4, which is normally rotated in forward and reverse directions by the drive unit 6 during washing and rinsing. In addition, 8 is a drain pipe connected to the bottom of the water receiving tank 2, and 9 is a drain valve. Now, 10 is a normally open type unbalance detection switch provided in the upper cover 11 at the top of the outer box 1, and 12 is a detection lever provided from the unbalance detection switch 10 to the outer surface of the upper end of the water tank 2. The abnormal vibration caused by the unbalance of the rotary tank 4 during a water outage is received by the detection lever 12 via the water receiving tank 2, and the unbalance detection switch 10 is closed. An unbalance detection signal is output from a detection signal output circuit (not shown) based on the opening/closing of the switch. 1
Reference numeral 3 denotes an operation control device consisting of a microcomputer, which is provided on the back surface of the front panel 11a of the upper cover 11. This operation control device 13 controls the washing process and the dehydration process, and in particular, in the dehydration process, when an imbalance is detected, an unbalance correction process is performed, and this correction process is not shown. Open the water supply valve to supply water into the rotating tank 4,
Next, the stirring body 7 is rotated intermittently to stir the material to be dehydrated, and finally the drain valve 9 is opened to drain the water.

Now, when the dehydration process is started, as shown in FIG. 2, initial settings are first performed, and in this initial setting, the execution time of the dehydration process is set. After that, the drain valve 9 is opened and the rotary tank 4 is driven to rotate at high speed, and the unbalance detection signal output circuit is energized and functions to perform unbalance detection. The presence or absence of the balance detection signal is given to the operation control device 13. When the dewatering execution time elapses without an unbalance detection signal being output from the unbalance detection signal output circuit, the rotation of the rotary tank 4 is stopped, and after a predetermined time, the drain valve 9 is closed, and the dewatering process is started. ends. By the way, if an imbalance is detected during this dehydration process,
First, the number of unbalance detections is counted, the rotation of the rotary tank 4 is stopped, and when the number of unbalance detections is the first in this case, the correction mode is set to the initial setting mode. This initial setting mode is, for example, the water supply amount setting value W.
In addition, the stirring time setting value K is set to _{K 1} , and the one-time intermittent driving time setting value R of the stirring body 7 at this stirring time K ₁ is set to r ₁ . After this, unbalance correction processing is performed. As shown in FIG. 3, this imbalance correction process first closes the drain valve 9, then
Water is supplied by opening the water supply valve until the water supply amount set value W reaches the content value W ₁ in this case, and stirring is performed by intermittent rotation of the stirring body 7 at the content value r ₁ of the intermittent drive time setting value R and the stirring time The setting value K is set to _K1 , and then the drain valve 9 is opened to drain water, and the first unbalance correction process is performed. After this, the rotary tank 4 is rotated again to perform dehydration again, but if unbalance is detected again here, the number of unbalance detections is increased to 2.
This is counted as the first time, and as a result, the modification mode is changed. In this correction mode change process, the water supply amount setting value W, stirring time setting value K, and intermittent driving time setting value R, which are the contents of the correction mode, are changed. For example, the water supply amount setting value W is changed to W ₂
(W ₂ > W ₁ ), set stirring time K to K ₂ (K ₂ > K ₁ )
In addition, the one-rotation time setting value R is set to r ₂ (r ₂ >r ₁ ). After this modification mode change processing, the aforementioned unbalance modification processing is performed in the modification mode. In this case, since the setting values of the water supply amount, stirring time, and intermittent driving time are increased in the correction mode compared to the previous correction mode, the dewatered water is located unevenly in the rotating tank 4. The effect of correcting the object is enhanced, and the unbalance is usually corrected by this second unbalance correcting process, after which dehydration is performed again in the same manner as described above. Note that if imbalance is detected after this second unbalance correction process, the unbalance correction process is performed in a correction mode different from the previous correction mode.
When the number of unbalance detections reaches 4 or more, the drive of the rotary tank 4 is stopped, the drain valve 9 is closed, and an alarm (not shown) is activated to notify the abnormality, and then the dewatering process is stopped. be done.

In the above embodiment, when changing the correction mode, each of the water supply amount, stirring time, and intermittent drive time is changed. Alternatively, a plurality of them may be changed.

[Effects of the Invention] As understood from the above embodiments, the present invention includes a rotating tank for both washing and dehydration, and an agitator inside the rotating tank to perform washing and dehydration, and to remove water during the dehydration process. Water supply when balance is detected,
In a washing machine that performs unbalance correction processing consisting of agitation and drainage, and then repeats spin-drying, if unbalance is detected twice or more in one spin-drying process, the second and subsequent This is a spin control method for a washing machine with both spin and spin functions, characterized in that the imbalance correction process is performed in a correction mode different from the previous imbalance correction process, and in this way, the imbalance in one spin process is If is detected more than once, the correction mode for the previous imbalance correction process is considered to have a small effect on imbalance correction, and the correction mode for the next imbalance correction is changed. It is possible to increase the correction effect, and therefore, compared to the conventional case of correcting unbalance using a uniform correction mode, it is possible to suppress the occurrence of unbalance from the second time onwards, and shorten the dehydration time. It has excellent effects such as being able to greatly improve the

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional side view of a dehydrating and washing machine, and FIGS. 2 and 3 are flowcharts. In the figure, 4 is a rotating tank, 7 is an agitator, 10 is an unbalance detection switch, 11 is a detection lever, and 13 is an operation control device.

Claims (1)

[Claims] 1. A rotating tank for washing and dewatering is provided, and an agitator is provided inside this rotating tank to perform washing and dehydration, and when an imbalance is detected during the dehydration process, an unbalance correction process consisting of water supply, stirring, and drainage is performed. In a washing machine that is designed to repeatedly perform spin-drying, if imbalance is detected twice or more in one spin-drying process, the unbalance correction process for the second and subsequent cycles is repeated by the unbalance correction process for the previous cycle. A dehydration control method for a washing machine that also performs dehydration and dehydration, characterized in that the dehydration control method is performed in a correction mode different from that of the dehydration/dehydration washing machine.