KR100240845B1 - Method of preventing generation of chattering of buoyancy washing machine - Google Patents

Abstract

The present invention relates to a method for preventing chattering of a buoyancy type washing machine. In particular, a process of preventing chattering mode for driving a washing motor at a low speed immediately before dehydration of a balance when dewatering a buoyant type washing machine is additionally provided.

According to the present invention, in the dehydrating stroke of the buoyancy type washing machine, the step of performing the locking mode at the initial stage of the dewatering stroke (step 10), the clearance between the pulsator 20 and the float clutch 10 of the buoyancy type washing machine, and the float clutch (10) 100 times the motor on time and 10 msec on time 10msec to prevent noise generated in the gap between the engaging protrusion 51 of the fitting protrusion 51 of the washing tub 40 and the fitting protrusion 52 of the flange tub 41 side of the washing tub 40 Performing a chattering prevention mode in which the operation is repeated at a low speed (step 11); and performing a balance dehydration for detecting the deflection of the laundry in the washing tank (step 12); By sequentially performing the step (Step 13), the clearance between the pulsator 20 and the float clutch 10 of the buoyancy type washing machine, the flanges of the engaging protrusion 51 and the washing tank 40 of the float clutch 10 (41) side engagement protrusion (52) In the gap therebetween, the engagement protrusions can be prevented from interfering with each other in the initial stage of balance dehydration.

Description

How to prevent chattering in buoyancy type washing machine

The present invention relates to a method for preventing chattering of a buoyancy type washing machine. In particular, a pulsator of a buoyancy type washing machine is provided by additionally driving a washing motor at a low speed immediately before dehydration of a balance when dewatering a buoyancy type washing machine. And the clearance between the float clutch and the clearance between the engagement protrusion of the float clutch and the flange tub side engagement protrusion of the washing tub are prevented from interfering with the engagement protrusions at the initial stage of balance dehydration.

In general, when looking at the power transmission mechanism of the buoyancy type washing machine shown in Figure 1 can be divided and divided into when washing and dehydration, first, when the water is supplied during washing as shown in Figure 2a the buoyancy chain float clutch 10 is Floating by buoyancy is accommodated in the receiving portion 30 of the pulsator 20, wherein the clutch 10 is coupled to one side of the rib 50 and is separated from the engaging projection 52 of the washing tank (40).

Accordingly, the power of the motor during washing is transmitted to the washing shaft of the pulsator 20.

On the other hand, when the washing and rinsing stroke is finished and after entering the dehydration stroke after the drainage treatment, the water is in the washing tank 40, so the float clutch 10 sinks to the lower side of the washing tank 40 as shown in FIG. The (10) side engaging protrusion 51 is engaged with the corresponding flange 52 of the tubing flange 41 of the corresponding washing tub 40 so that the power of the motor is simultaneously transmitted to the washing tub 40 and the pulsator 20. . Therefore, during dehydration, the flange tub 41 and the pulsator 20 of the washing tub 40 are rotated in the same body.

When the dehydration stroke of the buoyancy washing machine having the operation mechanism as described above is started, the balance dehydration is first performed in the operation state as shown in FIG. 4B.

In other words, the balance dehydration is performed four times to drive the motor for 4 seconds and stop for 3 seconds. When dehydration, the rotation speed increases while the dehydration motor is running for 4 seconds, but the rotation speed decreases when stopping for 3 seconds. When the dehydration motor is driven again, dehydration is performed in an iterative process of increasing the reduced rotation speed.

As soon as the balance dehydration as described above, the dehydration starts.

However, in the prior art, when the balance dehydration starts in the dehydration stroke, the dehydration motor is immediately rotated at high speed, and the balance dewatering is performed in the gap between the pulsator and the float clutch of the buoyancy washing machine, and the gap between the fitting protrusion of the float clutch and the fitting protrusion of the flange tub side of the washing tub. Initially, there was a problem that interference sounds were generated by the engagement protrusions continuously hitting each other.

An object of the present invention by additionally performing a process of driving the washing motor at a low speed just before the balance dewatering when dewatering with a buoyancy type washing machine, the clearance between the pulsator and the float clutch of the buoyancy type washing machine, the flange tub of the mating protrusion of the float clutch and the washing tank The present invention provides a method of preventing chattering of a buoyancy type washing machine to prevent the interference sound of the protrusions from being continuously generated in the initial stage of balance dehydration in the gap between the protrusions.

In particular, the present invention provides a step of performing the locking mode in order to realize the object of the above example, a gap between the pulsator and the float clutch of the buoyancy washing machine, and a gap between the fitting protrusion of the float clutch and the fitting protrusion of the flange tub side of the washing tub. To perform the chattering prevention mode to operate at low speed by repeating the on time of the motor at 10msec and the off time at 10msec for about 100 times to prevent the noise generated from the noise, and the balance dewatering to detect the bias of the laundry in the washing tank. And performing the dehydration as soon as the step is completed and the step is completed.

Hereinafter, more specific features of the present invention will be understood by describing the same in detail with the accompanying drawings.

1 is a cross-sectional view showing a power transmission device of a general buoyancy type washing machine;

Figure 2a is an enlarged cross-sectional view showing the main portion of the buoyancy type washing machine operating state when washing,

Figure 2b is an enlarged cross-sectional view showing the operating state of the buoyancy type washing machine cross-sectional view showing a state when dehydration,

3 is a control block diagram for implementing the present invention;

4 is a flow chart according to the present invention;

5A is a waveform diagram showing an input wave at the time of general balance dehydration;

5B is a waveform diagram illustrating an input wave in a chattering prevention mode according to the present invention.

** Explanation of symbols on the main parts of the drawing **

1: washing operation input unit 2: microcomputer

3: motor drive part 10: float clutch

20: pulsator 30: accommodating part

40: washing tank 41: flange tub

50: rib 51,52: engagement protrusion

60: water tank 70: washing tank stand

3 is a control block diagram used in the present invention, the washing operation input unit (1) for setting the number of rotations and the number of rotations, the time according to the number of dehydration and receiving the signal input through the washing operation input unit (1) It consists of a microcomputer (3) for controlling each part of the washing machine, and a motor driving unit (4) for receiving the control signal output from the microcomputer (3) to transfer power to the pulsator and the flange tub side of the washing tub during washing and dehydration Lose.

4 is a flowchart illustrating a chattering prevention method of the buoyancy type washing machine according to the present invention.

That is, in the dehydrating stroke of the buoyancy type washing machine, the step of performing the locking mode at the initial stage of the dehydrating stroke (step 10), the gap between the pulsator and the float clutch of the buoyancy type washing machine, the engaging protrusion of the float clutch and the flange of the washing tank Performing a chattering prevention mode in which the on and off operation of the motor is repeated at a low time to prevent noise generated in the gap between the jaw-side engaging projections (step 11); A step of performing balanced dehydration to detect (step 12) and a step of performing the dehydration (step 13) immediately after the step is completed.

Referring to the process of the present invention configured in this way in more detail as follows.

First, when the user applies power to the washing machine and inputs various function keys to the washing operation input unit 1, the microcomputer 2 controls the motor driving unit 3 to drain the washing and rinsing in a series of washing administrations. After treatment, the dehydration stroke is started.

The dehydration operation proceeds in the order of this mode, the chattering prevention mode, the balance dehydration and the main dehydration in order.

First, when the buoyancy type washing machine finishes the washing operation and drains, the float clutch 10 sinks to the lower side of the washing tank 40 as shown in FIG. 2B, and accordingly, the engaging protrusion 51 of the float clutch 10 side corresponds thereto. The engagement tub 52 of the flange tub 41 side of the washing tub 40 is engaged, so that the power of the motor is transmitted to the washing tub 40 and the pulsator 20 simultaneously, and thus, when dewatering, the washing tub 40 and the pulsator are dehydrated. The data 20 is rotated to the same body.

At this time, if the engagement protrusions of the flange tub 41 side of the float clutch 10 and the washing tub 40 do not bite each other well, the engagement protrusions collide with each other to generate an interference sound, and thus, before entering the chattering prevention mode to prevent this, The mode is performed (step 10).

That is, the locking mode refers to turning the motor on and off in an instant so that the engaging clutch of the float clutch 10 and the flange tub 41 side of the washing tub can be well bited with each other. For example, the motor may be repeatedly driven about five times with an on time of 10 msec and an off time of 1000 msec.

Immediately after the jamming mode as described above, it enters the chattering prevention mode. First, it is necessary to look at the cause of chattering.

Chattering refers to noise caused by interference noises generated by the engaging protrusions. The main causes of such chattering are the clearance between the pulsator 20 and the float clutch 10, and the engaging protrusion of the float clutch 10 and the washing tank 40. This is because a gap is generated between the fitting protrusions on the flange tub 41 side. However, there is a certain amount of gap for smooth conversion because it does not force the fitting by using separate power for washing and dehydration.

Therefore, in order to prevent chattering by adjusting the gap, there is a limit and another method must be searched. In the present invention, the input wave applied to the AC motor is input as a half wave as shown in FIG. 5B to lower the speed of the AC motor at a low speed. (Herein, Fig. 5A shows a conventional input waveform when balancing dehydration.) Of course, the output of the input wave is controlled by the microcomputer 2.

5A and 5B show, for example, that an AC frequency of 50 Hz is input. At this time, the length of one AC waveform is 20 msec.

Of course, at this time, using a DC motor is easy to control the speed, but because the technology has already been adopted by other companies in the present invention, the case of using an AC motor.

That is, in the case of an AC motor, the input wave can only be controlled in half-wave units. Dehydration for a certain period of time in half-wave mode and abnormal shock noise does not occur when the radio wave is input, so chattering prevention mode is to proceed to balance dehydration after inputting half-wave for a certain time before dehydration.

That is, in the above chattering prevention mode, the microcomputer controls the motor to rotate at a low speed of about 45 to 76 rpm by repeating 100 times with the on time of the motor 10 msec and the off time 10 msec (step 11).

At this time, as described above, the reason why the on-time and off-time of the motor are rotated at a short interval of 10 msec, respectively, is low because the clearance between the pulsator 20 and the float clutch 10 as the motor rotates, and the float clutch ( It is for initializing the rotational impact amount which arises in the clearance gap between the engaging protrusion of 10) and the engaging protrusion of the flange tub 41 side of the washing tub 40.

For reference, when the chattering prevention mode is employed as in the present invention and when the chattering is not employed as before, the occurrence of chattering shows a considerable difference.

First, Tables 1 to 5 show the number of chattering occurrences for each level when the chattering prevention mode is not employed in dehydration operation.

Water level 150 mm (water load) division Count One 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 system Primary chattering N Y N Y Y Y Y Y Y N Y Y Y Y Y N N N Y Y 14/20 Second chattering N N N N N N N Y N N N Y N N Y Y N Y N N 5/20 Chattering N Y N Y Y Y Y Y Y N Y Y Y Y Y Y N Y Y Y 16/20

Water level 180mm (10 pieces of bags) division Count One 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 system Primary chattering N N N Y Y N Y N N N N Y Y Y N N N N Y N 7/20 Second chattering N N N N Y Y N Y N N Y Y N N N N Y N N N 6/20 Chattering N N N Y Y Y Y Y N N Y Y Y Y N N Y N Y N 11/20

Water level 240mm (20 pieces of bags) division Count One 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 system Primary chattering N N N N N N N N N Y N N N N N Y N Y Y N 4/20 Second chattering N N N N N N N Y Y N N N Y Y Y N N N Y N 5/20 Chattering N N N N N N N Y Y Y N N Y Y Y Y N Y Y N 9/20

Water level 300 mm (30 pieces) division Count One 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 system Primary chattering N N N N N N N N N Y N Y N N Y Y N Y N Y 6/20 Second chattering N Y Y N N Y Y N Y Y Y Y N Y N Y N Y Y N 12/20 Chattering N Y Y N N Y Y N Y Y Y Y N Y Y Y N Y Y Y 14/20

Water level 350 mm (40 pieces) division Count One 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 system Primary chattering N N N N N N N N N N N N N Y N N N N N N 1/20 Second chattering N N N Y N Y N N Y Y Y Y Y Y Y Y Y Y N N 12/20 Chattering N N N Y N Y N N Y Y Y Y Y Y Y Y Y Y N N 14/20

Tables 6 to 10 show the number of chattering occurrences for each level when the chattering prevention mode according to the present invention is adopted.

Water level 150 mm (water load) division Count One 2 3 4 5 6 7 8 9 10 system Primary chattering N N N N N N N N N N 0 Second chattering N N N N N N N N N N 0 Chattering N N N N N N N N N N 0

Water level 180mm (small load: bag ten pieces) division Count One 2 3 4 5 6 7 8 9 10 system Primary chattering N N N N N N N N N N 0 Second chattering N N N N N N N N N N 0 Chattering N N N N N N N N N N 0

Water level 240mm (low load: 20 pieces of cloth) division Count One 2 3 4 5 6 7 8 9 10 system Primary chattering N N N N N N N N N N 0 Second chattering N N N N N N N N N N 0 Chattering N N N N N N N N N N 0

Water level 300mm (heavy load: gun 30 pieces) division Count One 2 3 4 5 6 7 8 9 10 system Primary chattering N N N N N N N N N N 0 Second chattering N N N N N N N N N N 0 Chattering N N N N N N N N N N 0

Water level 350mm (high load: 40 pieces of guns) division Count One 2 3 4 5 6 7 8 9 10 system Primary chattering N N N N N N N N N N 0 Second chattering N N N N N N N N N N 0 Chattering N N N N N N N N N N 0

That is, it can be seen from the experimental data of Tables 7 to 10 that chattering hardly occurs when the chattering prevention mode is adopted in the dehydration operation.

As soon as the chattering prevention mode is finished, the balance dewatering is immediately performed. The balance dehydration is dehydrated while performing 4 times of on-time for 4 seconds and 4 times of off-time for 3 seconds. In this case, the rotation speed is increased, but when the motor is stopped for 3 seconds, the rotation speed is decreased, and when the dehydration motor is driven, the rotation speed is dehydrated in an iterative process of increasing the reduced rotation speed (step 12).

As soon as the balance dehydration as described above is completed, the main dehydration starts (step 13), and after the dehydration, the dehydration administration ends.

As described above, the method for preventing chattering of the buoyancy type washing machine according to the present invention additionally performs a process of driving the washing motor at a low speed just before the balance dewatering when dewatering the buoyancy type washing machine. In the gap between the 10 and the gap between the engagement protrusion 51 of the float clutch 10 and the engagement protrusion 52 of the flange tub 41 side of the washing tub 40, the engagement protrusions are continuously separated from each other in the initial stage of balancing. It is possible to prevent the occurrence of interference sound by hitting.

Claims (1)

In the dehydrating stroke of the buoyancy type washing machine, the step (step 10) of performing the latching mode at the initial stage of the dehydrating stroke, the clearance between the pulsator 20 and the float clutch 10 of the buoyancy type washing machine, and the float clutch 10 The on-time of the motor 10 msec and the off-time 10 msec about 100 times are repeated to prevent noise generated in the gap between the fitting protrusion 51 of the fitting protrusion 51 and the flange tub 41 side fitting protrusion 52 of the washing tub 40. Performing a chattering prevention mode to operate at a low speed (step 11), performing a balance dehydration for detecting the bias of the laundry in the washing tank (step 12), and performing the dehydration soon after the step is completed. (Step 13), the chattering prevention method of the buoyancy type washing machine.

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