JPS5946634B2 - Washing machine operation control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In a clock-type time switch generally used in washing machines and the like, the time limit is adjusted by changing the set position of the time limit.

Therefore, since the rotational speed of the cam that controlled the switch was constant, the control mode of the controlled device could not be changed, and in response to new needs, the number of cams for that purpose was increased according to the number of needs. Switches were also added accordingly.

This increases the cost and the size.

Also, component parts, such as the mainspring specifications, had to be replaced each time.

Furthermore, although a control mode with optimal conditions is required for a fluctuating load, there is a limit to the number of cams, so stepless control is possible, but in the middle of the number of control stages, the load characteristics are essentially sacrificed. .

For example, although the amount of laundry to be washed generally fluctuates without steps, the water flow was switched in two or three steps.

Furthermore, there were many parts required to satisfy the switching function, and the manufacturing cost was high.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for controlling a washing machine that can steplessly obtain a washing water flow corresponding to the amount of items to be washed.

The feature of the present invention is that, in a method of controlling a washing machine, a clock-type time switch is used, and a magnetic force is applied to the balance wheel to change the magnetic field strength.
The time limit speed of the time switch is changed, an impedance is inserted in series with the electromagnet for generating the magnetic field, the partial voltage drop value of the motor is supplied to this impedance, and the impedance value is related to the capacity of the washing object.

An embodiment of the present invention will be described below based on the drawings.

1 is a time switch, which controls the rotation of the escape wheel 3 by the rotational force of the built-in mainspring and the inertia of the reciprocating rotation of the balance wheel 2, thereby controlling the cam 5 attached to the operating shaft 4 at the speed of ω. It rotates at an angular velocity.

The cam 5 is provided with a plurality of grooves on its outer periphery at equal pitches, each consisting of steps 6, 7, 8, 9, and 10.

Stages 6 and 10 and stages 7 and 9 are at the same level, the latter being lower than the former, and stage 8 is provided lower than that.

A contact piece 11 is press-fitted into a part of the case 12, and fixed contacts 14 and 15 are fixed to the case 12 facing the movable contact 13.

A heel 16 is fixed to the contact piece 11, slides on the stepped portion of the cam 5, and moves up and down accordingly.

Therefore, when the heel 16 is on the step 8, the contact 13,
14 is closed, and the power terminal 17 is connected to the terminal 20 of the motor 21.
The motor 21 rotates clockwise.

When the heel 16 is on step 7 or 9, the contact piece 11 is 11
', the contact 13 does not contact the fixed contacts 14 and 15, and the motor 21 is cut off from the power supply 17.

When heel 16 is on step 6 or 10, contact 13
and 15 are in contact, and the power source 11 is connected to the terminal 19 of the motor 21.
This causes the motor 21 to rotate to the left.

18 is another power terminal of the motor 21.

22 is a stopper projection provided on the cam 5, which is indicated by arrow 2.
When it returns to the three directions and finally comes into contact 22' with the boss 24 provided on the case 12, the time switch 1 stops.

At this time, since a step 25 having the same height as steps 7 and 9 is provided in contact with the protrusion 22, the circuit is turned off in the contact state 22'.

26 is an electromagnet, which is fixed to the case 12.

One end of the coil of the electromagnet 26 is connected to the terminal 31 of the motor 21.
At the same time, the other end is connected 32 to a part of the coil of the motor 21 so as to obtain the necessary excitation voltage.

In addition, an impedance 3 for excitation adjustment is connected in series to the electromagnet 26.
Insert 3.

Reference numeral 34 denotes an X adjuster, which is pushed by the bottom of a measuring wheel 36 placed on a spring 35 fixed to the washing machine main body 38, and slides on the impedance 33 while being associated with it.

When the basket 36 is empty, the position is 36', and when clothes are loaded, the basket 36 is lowered while pushing the adjuster 34.

This determines the relationship between weight and X.

Next, the operation of the present invention will be explained.

When the time switch 1 is in the OFF position, that is, the protrusion 22 of the cam 5 is in the 22' position, turn the operating shaft 4 in the direction of the arrow 29 and set it to the 22 position.

When released, the operating shaft 4 returns to the direction of the arrow 23 with an angular velocity ω
Go around.

Now, since the electromagnet 26 is excited, magnetic flux crosses the balance wheel 2, and the rotation of the balance wheel 2 is controlled by its braking action.

Therefore, the cam 5 rotates at a limited ω.

Here, by adjusting the impedance 33 and making the impedance smaller, the braking force becomes stronger and ω becomes lower.

When increasing ω, the impedance is increased.

The relationship between the angular velocity ω and the impedance X is a curve shown at 30 in FIG.

On the other hand, the motor 21 rotates left and right by the cam groove as described above, but when X-Xl and X-
When X2, the rotation patterns are a and a in Figure 2, respectively.
l), and the period of rotation is, for example, T11>T12.

Here, the selection of X can be made continuously, so the motor 21
That is, if the rotation period of the washer pulsator is set to the minimum value at point X2, it can be continuously varied from T21 to infinity.

Now, when actually washing the items, X is determined by calculating the weight of the items to be washed as described above.

Therefore, the braking force of the balance wheel 2 of the electromagnet 26 is determined, for example, X
When the motor 21 rotates in the forward direction, the motor 21 repeats the reversal at a period of Tll, and when it rotates in the reverse direction, it repeats the reversal at a period of T1□.

The reason for T1, > T1 □ is that when the power supply 17 is connected to 20 by the changeover switch, a capacitor is inserted into the circuit 20-32-31, so the voltage will be lower than when there is no capacitor in the opposite case. This is because the braking force of the balance wheel 2 becomes weaker.

If the relationship between T1 and >T1□ is combined in accordance with the reversal mode of circulation of the items to be washed in the washing tank, unprecedented washing can be achieved.

As described above, according to the present invention, a commonly used time switch includes an electromagnet and its excitation.

By simply adding an adjustment impedance, you can change the pulsator's unidirectional rotation, that is, the left- and right-handed spiral water flow, to a short-period reversal water flow similar to an agitating water flow. It is possible to provide a new technology that can fully respond to the strength and weakness of fabrics, and it is extremely effective.

Furthermore, the selection of the water flow was conventionally determined based on the user's experience, but according to the present invention, once the weight of the item to be washed is measured, it is memorized and the optimum water flow is automatically determined based on the weight. is obtained, so washing can be carried out in the most timely manner.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of a time switch showing one embodiment of the present invention, and FIG. 2 is a diagram showing the mode of cam rotation and pulsator reversal. 1... Time switch, 2... Balance, 21... Motor, 26... Electromagnet, 33... Impedance.

Claims (1)

[Claims] 1 Using a clock-type time switch, the time limit speed of the time switch is changed by applying magnetic force to the balance wheel and changing the magnetic field strength, and the time limit speed of the time switch is changed according to the weight of the washing tank in series with the electromagnet for generating the magnetic field. Insert the impedance and supply the partial voltage drop value of the motor to this,
A method for controlling the operation of a washing machine, characterized in that the impedance value is related to the volume of the items to be washed, and a washing water flow corresponding to the amount of items to be washed is obtained steplessly.