KR101668455B1 - Method for controlling spin drying of washer - Google Patents

Abstract

The present invention relates to a dewatering control method for a washing machine, wherein when a safety switch is operated at a final target RPM during a dewatering operation of a washing machine, the final target RPM is adjusted downward to complete dewatering operation, The delay of time can be reduced.

Description

METHOD FOR CONTROLLING SPIN DRYING OF WASHER [0002]

The present invention relates to a dewatering control method for a washing machine, and more particularly, to a dewatering control method for a washing machine which can complete a dewatering operation by downwardly adjusting a final target RPM when a safety switch is operated at a final target RPM during a dewatering operation of a washing machine ≪ / RTI >

In general automatic washing machines, two systems of safety devices are provided in order to prevent personal injury and damage to fabric during dehydration. One of them is a door opening monitoring device for monitoring door opening during a dewatering operation in a washing machine, and the other is a device for preventing excessive unbalance, i.e., eccentricity, due to unevenness of laundry in a dewatering tank during dewatering.

The signal source for these two safety devices is obtained from one safety switch. The safety switch may be actuated by the opening and closing movement of the door, or by a lever extended and extended to the washing tub.

Providing a signal to two safety devices using the contacts of one safety switch is achieved by using the open time of the safety switch contacts. Specifically, if the open time of the safety switch is 300 ms or longer, it is determined that the door is open. If the safety switch is 300 ms or shorter, it is determined that the unbalance dehydration is in progress.

Therefore, when the unevenness of the laundry is heavy during the dehydration operation, the swing of the washing machine becomes large. Therefore, it is possible to grasp the unbalance state by opening the lever of the safety switch, and the open time of the safety switch becomes longer The motor drive current interruption for dewatering drive is interrupted. When the door is closed, the dewatering operation is continued by the normal power transfer.

The above description refers to the background of the technical field to which the present invention belongs, and does not mean the prior art.

If it is determined that the safety switch is operated during the dewatering operation and the unbalance dewatering state is determined, the dewatering operation is repeated after the rinsing is repeated and the dewatering operation is repeated for the adjusted rinsing, .

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a dehydration control method of a washing machine which can complete the dehydration operation by adjusting the final target RPM downward when the safety switch is operated at the final target RPM during dehydration operation of the washing machine The purpose is to provide.

According to an aspect of the present invention, there is provided a dewatering control method for a washing machine, including: a first step of determining an operating state of a safety switch in a dewatering operation; A second step of determining whether the final target RPM is reached when the safety switch is operated; A third step of terminating the dewatering operation for the adjusted rinse when the final target RPM is not reached, and adjusting the final target RPM when the final target RPM is reached; A fourth step of determining the operating state of the safety switch after the final target RPM is adjusted downward; And a fifth step of determining the operation state of the safety switch in the fourth step and terminating the dewatering operation for the adjusted rinsing when the operation switch is operated.

In the first and fifth steps of the present invention, the operating state of the safety switch is continuously determined until the dewatering operation is completed.

And if the final target RPM is reached in the third step of the present invention, it is determined whether the intermediate dewatering is to be performed, and if it is intermediate dewatering, the dewatering operation is terminated.

As described above, according to the present invention, when the safety switch is operated at the final target RPM during the dewatering operation of the washing machine, the final target RPM is downwardly adjusted to complete the dewatering operation, thereby reducing the delay of the dewatering time .

1 is a block diagram showing a control circuit of a washing machine according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a dewatering control method of a washing machine according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a dewatering control method of a washing machine according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing a control circuit of a washing machine according to an embodiment of the present invention.

The set value data of the washing machine user by the operation selecting unit 12 provided on the operation panel of the washing machine is input to the microcomputer 10 together with the open contact signal of the safety switch 11 as shown in FIG.

A timer 14 and a buzzer 13 are connected to the microcomputer 10. The water supply and drainage control signals outputted from the microcomputer 10 are connected to the water supply valve driving unit 15 and the drain valve driving unit 16 respectively and the pulsator control signal outputted from the microcomputer 10 is supplied to the pulsator driving unit 15, (18).

The outputs of the water valve driving section 15 and the drain valve driving section 16 are connected to the water feed valve 19 and the drain valve 20 respectively and the pulsator driving section 18 is connected to the pulsator driving motor 22.

FIG. 2 is a flowchart illustrating a dewatering control method of a washing machine according to an embodiment of the present invention.

As shown in FIG. 2, the dewatering control method of the washing machine according to the embodiment of the present invention is performed when the dewatering operation proceeds.

The present invention is applied not only when the dewatering operation is performed after the washing operation and the rinsing operation but also when the intermediate dewatering operation is performed during the washing operation or the rinsing operation.

During the dehydration operation, the operation state of the safety switch 11 is determined (S10) (S12).

If the safety switch 11 is not operated during the dewatering operation, the dewatering operation is terminated when the dewatering is continued for a set time after acceleration to the final target RPM in accordance with the normal dewatering operation.

However, when the safety switch 11 is operated, it is determined whether the final target RPM has been reached (S14).

At this time, if the safety switch 11 is operated in a state in which the final target RPM is not reached, the dehydration operation is terminated to execute the adjustment rinsing (S16).

When the dewatering operation is completed for the adjusted rinsing, the rinsing operation is performed again after the rehydration is performed, and then the dewatering operation is newly performed.

However, if the final target RPM is reached, it is determined whether the current dehydration operation is an intermediate dehydration (S18).

At this time, in the case of intermediate dehydration, it is dehydrated in the middle of the washing operation or the rinsing operation, so that even if the dehydration operation is not completed, it is determined that the operation does not greatly affect the washing operation or the rinsing operation and the dehydration operation is terminated and the washing operation or rinsing operation is continued .

However, if it is not intermediate dehydration, the final target RPM is adjusted downward (S20).

In this embodiment, when the initially set final target RPM is 600 to 700 RPM, the final adjusted target RPM is adjusted to 500 to 550 RPM so as to reduce noise and vibration of the set.

After the final target RPM is adjusted downward, the operating state of the safety switch 11 is continuously determined until the dewatering operation is completed (S22).

After the final target RPM is adjusted downward, the operating state of the safety switch 11 is determined. When the safety switch 11 is operated, the rinsing is performed to finish the dewatering operation (S16).

However, if the safety switch 11 is not operated due to the noise and vibration of the set being reduced by adjusting the final target RPM downward, the dehydration operation is normally terminated, thereby reducing the dehydration time delay (S24).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: Microcomputer 11: Safety switch
12: operation selection unit 13: buzzer
14: Timer 15: Water supply valve drive section
16: drain valve driving part 18: pulsator driving part
19: Water supply valve 20: Drain valve
22: pulsator motor

Claims (3)

A first step of determining an operating state of the safety switch in a dewatering operation;
A second step of determining whether the final target RPM is reached when the safety switch is operated;
A third step of finishing the dewatering operation for the adjusted rinse when the final target RPM is not reached, and adjusting the final target RPM when the final target RPM is reached;
A fourth step of determining an operating state of the safety switch after the final target RPM is adjusted downward;
And a fifth step of determining the operation state of the safety switch in the fourth step and terminating the dewatering operation for the adjustment rinse when the safety switch is activated.
2. The method according to claim 1, wherein the operating state of the safety switch is continuously determined until the dewatering operation is completed in the first step and the fifth step.
The method according to claim 1, further comprising the step of determining whether the intermediate dewatering is performed when the final target RPM is reached in the third step, and ending the dewatering operation if the intermediate dewatering is performed.

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