JPH01314596A - Apparatus and method for controlling running of hydroextractor - Google Patents

Abstract

PURPOSE:To enable a hydroextracting motor to be continuously rotated in the rigid direction by turning on a right rotation switch engaging a claw of a cam for the right rotation in hydroextracting running and stopping the rotation of a torque motor by the action of a means for controlling the rotation of the torque motor to turn off a brake. CONSTITUTION:When a hydroextracting switch 27 is depressed to connect the contact to the (b) side, current is supplied to a solenoid 26 of a torque motor 19, while current is also supplied to a torque motor body 23 through a normally closed contact (a) of a right rotation switch 20 to rotate an output shaft 19a. As a result, a right rotation cam 17 mounted on the output shaft 19a is rotated so that a claw of the cam 17 causes said switch 20 to be turned on to the normally opened contact (b) side and a hydroextraction motor 7 to start the right rotation. Then, an engaging part 14a of a brake arm 14 is pushed outward by the other claw of the right rotation cam 17 so that a brake is turned off while a brake piece 15 is separated from a coupling 10. Thus, the right rotation switch 20 is kept turning on while the brake is turned off so that the hydroextracting motor 7 is continuously rotated in one right direction for hydroextracting running.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an operation control device and method for a dehydrator of a two-tub washing machine that is equipped with a washing tub and a dehydrating tub and performs washing operations in the dehydrating tub. .

(Prior art) A two-tub washing machine that is equipped with a washing mechanism and a dehydrating mechanism is
As shown in Fig. 6, a washing tank (2) and a dehydration tank (3) are installed adjacent to each other inside the outside N (1).
) is installed inside the dewatering tank (4) as shown in Fig. 7.

Then, the rotation shaft (8) of the dehydration motor (7) attached to the bottom frame (5) via the vibration-proof spring (6) and the dehydration shaft (9) protruding from the lower part of the dehydration tank (3) are connected. Coupling (10)
The dehydration tank (3) is rotated by the dehydration motor (7). In the figure (11) is the rotation axis (8
) and screws for fixing the dehydration shaft (9) to the coupling (10), respectively.1. Further, the dehydration tank (3) is provided with a dehydration hole (12) for draining water in the peripheral side wall thereof.

By the way, the spin-drying tank (3) is originally used to remove water contained in clothes that have been washed or rinsed, but when there are few laundry items, this spin-drying tank (3) is used. ) may be used for washing operation.

Washing operation in this dehydration tank (3) is achieved by connecting a right rotation switch and a left rotation switch to the dehydration motor (7), and turning these switches on and off alternately to rotate the dehydration motor (7) in forward and reverse directions. Conventionally, the on/off control of the right rotation switch and the left rotation switch was performed by using a speed generator (
30) and an electronic control circuit using a microcomputer or the like that takes in the output from the speed generator 1 (30).

Next, to explain how to control the rotation of the dehydration motor (7) using such a microcomputer, Fig. 8 is a control circuit diagram, in which (31) is an on switch and (32) is a starting capacitor. A rotating magnetic field is generated that rotates the motor (7).

In the figure, (33) indicates a microcomputer, and (36) and (37) indicate a clockwise rotation switch and a counterclockwise rotation switch, respectively, which are operated by the output of the microcomputer (33).

First, to explain the power supply circuit to the microcomputer (33), when the on switch (31) is pressed, the commercial AC power supply (35
) is applied to the transformer (38), and the voltage reduced to about one-tenth by the transformer (38) is supplied to the diode bridge (39), where the AC waveform is full-wave shaped. And then the smoothing capacitor (40)
The voltage is smoothed and supplied to the microcomputer (33) as a DC voltage.

The microcomputer (33) to which voltage was applied in this way,
According to a preset program, first output is made to the right rotation switch (3G), and the right rotation switch (36) is turned on. As a result, the dehydration motor (7) rotates clockwise, and at this time, the rotation of the dehydration motor (7) causes the speed generator (30) to generate electricity, producing a voltage as shown in FIG.

For example, if the speed generator (30) is a two-pole type, this voltage waveform outputs a one-pitch sine wave when the dehydration motor (7) rotates once, and this -pitch sine wave is generated by the transistor (41). ) is converted into a rectangular wave as shown in Figure 9 by the microcomputer (33).
), and this rectangular wave is counted here to detect the rotational speed of the dehydration motor (7).

If turning on the clockwise rotation switch (36) is programmed in advance as 5 pulses, that is, 5 rotations of the dehydration motor (7), then when the microcomputer (33) counts 5 pulses, the clockwise rotation switch (36) is turned on. Turn off and stop supplying electricity to the dehydration motor (7).

This then causes the dewatering motor (7) to enter into free rotation. During this time, the speed generator (30) outputs an output due to the inertial rotation of the dehydration motor (7). For example, when the inertial rotation is detected by the 4-rotation microcomputer, the counterclockwise rotation switch (37)
output to reverse the dewatering motor (7) to the left.

In this way, when a preset number of pulses is detected by the microcomputer, the right rotation switch (36) is turned off, and after a predetermined number of pulses are detected as inertial rotation, the left rotation switch (37) is turned on. However, since the dehydration tank (7) contains water and laundry, a large inertial force is generated, and even after counting the predetermined number of pulses as the number of inertial rotations, the inertia continues to rotate in the same direction. Therefore, even if the left rotation switch (37) is turned on, the dehydration motor (7) may not rotate to the left and may continue to rotate to the right.

Therefore, as shown in FIG. 10, the time t between pulses was further measured, and even after the left rotation switch (37) was turned on, t+<
When tz, it is determined that the dehydration motor (7) is rotating inertia, and the number of counterclockwise rotation pulses is not counted.
>12, it is determined that counterclockwise rotation has started, and the number of counterclockwise rotation pulses is counted.

For dehydration operation in the dehydration tank (3), a speed generator (30) and a microcomputer (33) are used, and the microcomputer (33) counts the number of pulses from the speed generator (30). The energization time for continuous rotation of the dewatering motor (7) in one direction is controlled. .

(Problems to be Solved by the Invention) Conventionally, in the washing operation in the dehydration tank, the forward and reverse rotation time of the dehydration motor, and in the dehydration operation, the one-way continuous rotation time of the dehydration motor is determined by Since the number of pulses from the motor is counted by a microcomputer and the rotation speed is controlled based on this number of rotations, a speed generator and a microcomputer are required, which not only increases the number of parts, but also increases the number of parts. It was also expensive.

In addition, as for the control method, during washing operation, before the dehydration tank and dehydration motor stop, the rotation starts in the opposite direction, which places a large load on the dehydration motor.
．． There were problems such as a rapid temperature rise and prolonged rotation due to inertia even after the dehydration operation was completed.

The purpose of the present invention is to eliminate the disadvantages of the conventional example, and to apply a large load to the dehydration motor with a simple mechanical structure without using a microcomputer, not only when performing dehydration operation in a dehydration tank but also when performing washing operation. To provide an operation control device and method for a dewatering machine, which can reliably reverse the rotation forward and reverse in a stable state without overloading, and can quickly stop the dehydrating motor after the completion of dehydration.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a washing tank and a dehydration tank, and a washing operation in which the dehydration motor is reversed in forward and reverse directions on the dehydration tank side, and a washing operation in which the dehydration motor is operated in one direction. In a two-tub washing machine that performs dehydration by continuous rotation, a right rotation cam and a left rotation cam are connected to the output shaft of a torque motor installed near the dehydration motor. The clockwise rotation switch and the counterclockwise rotation switch and the brake mechanism are rotated so that the turning off of the rotation switch and the counterclockwise rotation switch and the braking of the brake mechanism facing the connecting shaft between the dehydration motor and the dehydration tank are the same. control means that engages with the rotation cam and the left rotation cam, and controls the rotation of the output shaft of the torque motor so that either the right rotation switch or the left rotation switch is continuously turned on during dehydration operation. In the process of washing by rotating the dehydration motor forward and reverse in the dehydration tank, either the right rotation switch or the left rotation switch is turned on by the rotation of the right rotation cam or the left rotation cam, and the dehydration motor is energized. When the dehydration motor is not energized, the brake mechanism is released by the cam and the right rotation switch and left rotation switch are turned off. When the dehydration motor is not energized, the brake is applied to the dehydration motor, and the dehydration motor is continuously rotated in one direction to perform dehydration. In the process of operation, the gist is to stop the rotation of the output shaft of the torque motor, stop the rotating cam at a position where the right rotation switch or left rotation switch remains on, and release the brake mechanism. It is something to do.

[Operation] According to the present invention, during washing operation in the dehydration tank, when the clockwise rotation cam rotates due to the rotation of the torque motor and engages the clockwise rotation switch, this is turned on and the dehydration motor rotates in the forward direction. Then, when the clockwise rotation cam rotates roughly and is disengaged from the clockwise rotation switch, the clockwise rotation switch is turned off, power to the dehydration motor is stopped, and the dehydration motor rotates due to inertia. At this time, at the same time, the rotation of the clockwise rotation cam releases the engagement between the brake mechanism and the cam, and the brake mechanism is operated to apply braking to the dewatering motor. Therefore, the inertial rotation of the dehydration motor is braked and stopped.

When the torque motor rotates further and the left rotation cam then engages the left rotation switch, this turns on and the dewatering motor starts rotating in reverse. Since this reversal is started after the dehydration motor has once stopped, a large load is not applied to the dehydration motor at the start of rotation, and the rotation is performed smoothly.

Further, during the dewatering operation, for example, the right rotation switch engages with the claw of the right rotation cam and is turned on. In this state, the rotation of the output shaft of the torque motor is stopped by the function of the means for controlling the rotation of the output shaft of the torque motor, so the dewatering motor continues to rotate clockwise with the brake mechanism released. .

(Example〕 Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a perspective view showing an embodiment of the operation control device for a dehydrator according to the present invention, and Fig. 2 is a plan view of the same. Attach the brake plate (13) to the top of the brake plate (13) so as to surround the camp ring (10).
) was attached, and the brake arm (14) was attached on this brake plate (I3). The brake arm (14) is curved and formed into an arcuate shape, and its base end is rotatably attached to the brake plate (13), with a coupling (
A brake piece (15) is provided that presses against the brake lever (10), and one end of the brake spring (1G) is fixed to the brake Fi (13).The other end is fixed to the brake spring (1G). Cam (17) and left rotation cam (18)
(14a) (14b).

A torque motor (19) is disposed near the dehydration motor (7) provided with a brake mechanism in this way, and the output shaft (19a) of the torque motor (19) is connected to the right rotation cam (17) and the left and right rotation cams (17). Install it so that it can cover the rotating cam (18).

This torque motor (19), as shown in FIG.
The drive shaft of the torque motor body (23) is connected to the output shaft (19a) via a gear (24) and a clutch (25), and the clutch (25) has a solenoid (26) for engaging and disengaging it. are concatenated. As shown in the electrical circuit diagram of FIG. 5, the torque motor main body (23) and the solenoid (26) are connected in parallel.

In the figure, (20) indicates a right rotation switch, and (2I) indicates a left rotation switch, and the contacts of both switches (20) and (21) are connected to the right rotation cam (17) and the left rotation cam (17), respectively.
8) Supply to.

In this case, the right rotation switch (20) and the left rotation switch (
21) Set the positional relationship between the clockwise rotation cam (17) and the counterclockwise rotation cam (13) so that they are in opposite phase, and turn on/off the clockwise rotation switch (20) and the counterclockwise rotation switch (21). The retaining part (1) of the brake arm (14) is
4a) (14b), the right rotation switch (20), the left rotation switch (21) and the engaging portion (
14a) and (14b) are positioned relative to the clockwise rotation cam (17) and the counterclockwise rotation cam (18). In addition, the right rotation cam (17) and the left rotation cam (18) are turned on when the left and right rotation switches (20) (21) are engaged. The release does not necessarily have to be completely synchronized (the release of the brake arm (14) may be delayed slightly).

Figure 3 shows dehydration motor (7) and torque motor (I9)
This is an electrical circuit diagram of a dehydration motor (7) to which a right rotation switch (20), a left rotation switch (21), and a starting capacitor (32) are connected, and a dehydration switch (27) having two contacts a and b. The contact side and the power supply (35) form a series connection circuit for dehydration, and the a contact side of the dehydration switch (23), the washing switch (22) having two contacts a and b connected in parallel, and the right and left Rotary switch (20)
(21), the dewatering motor (7), and the power supply (35) form a series connection circuit for washing.

The right rotation switch (20) has two contacts, a normally closed contact a and a normally closed contact G, and the torque motor main body (23) of the torque motor (19) is connected in series to the series connection circuit for dewatering. Solenoids (26) are connected in parallel. Also, the torque motor body (23) and solenoid (26)
are connected in series to the series connection circuit of the washers, respectively.

Next, first, an operation control method when performing a washing operation in a dehydration tank will be explained.

Put the laundry in the dehydration tank (3) and wash it in the washing machine (22
), the dewatering switch (27) is closed to side a at this time, so the torque motor main body (23) and the solenoid (26) are energized. As a result, the clutch (
25) are engaged, the rotation of the torque motor main body (23) is transmitted to the output shaft (19a) via the gear (24), the output shaft (19a) rotates, and the clockwise rotation cam attached thereto rotates. (17) and the counterclockwise rotation cam (18) also rotate, for example, as shown in FIG.
) presses the contact of the clockwise rotation switch (20), which causes b
Lean to the side and turn on.

As a result, the dehydration motor (7) is energized, and the dehydration motor (7) first rotates clockwise. At this time, the retaining part (14a) of the brake arm (14) is connected to the clockwise rotation cam (17).
The brake piece (15) attached to the brake arm (14) is located away from the coupling (10) of the dewatering shaft (9) and is pushed outward by the other pawl. It is in a state.

Furthermore, the rotation shaft (19a) of the torque motor (19) rotates, and the contact point of the right rotation switch (20) changes to the right rotation cam (1).
At the same time, the engaging part (14a) of the brake arm (14) also comes off from the claw of the clockwise rotation cam (18), and at the same time as the dehydration motor (7) is de-energized, the brake arm ( 14) is pulled by the tensile force of the brake spring (16), and the brake piece (15) is brought into contact with the coupling (1).
0).

As a result, a brake is applied to the dehydration motor (7) during its inertial rotation, and the dehydration motor (7) is stopped.

Then, the rotation shaft (19a) of the torque motor (19) rotates further, and then the claw of the left rotation cam (18) presses the contact of the left rotation switch (21), turning it on, and the dehydration motor (7) This time it rotates to the left, the opposite direction from the previous time.

At this time, the other claw of the left rotation cam (18) pushes the retaining part (14b) of the brake arm (14) outward, causing the brake arm (14) to resist the elasticity of the brake spring (16). Turn the coupling (10) of the brake piece (15) outward.
) is released.

Then, the torque motor (19) rotates further and the pawl of the left rotation cam (18) disengages from the contact of the left rotation switch (21), and at the same time the retaining part (1) of the brake arm (14)
4b) also comes off the claw of the left rotation cam (18), and at the same time the power to the dehydration motor (7) is cut off, the brake piece (
15) presses the coupling (1o).

As a result, a brake is applied to the dehydration motor (7) during its inertial rotation, and the dehydration motor (7) is stopped.

In this way, the left and right rotation cams (17) (18
) is rotated by the torque motor (19), the right rotation switch (20) and the left rotation switch (21) are turned on alternately, and the dehydration motor (7) repeats forward and reverse rotation 6, and the left and right rotation switches are turned on alternately. When the rotation switches (20) and (21) are off, brake braking is applied to the dewatering motor (7). Therefore, after the dewatering motor (7) stops once, it shifts to the next normal rotation or reverse rotation.

Next, to explain how to control the dehydration operation, when you press the dehydration switch (27) and connect its contact to the b side,
At the same time as the solenoid (26) of the torque motor (19) is energized, the torque motor main body (23) is also energized via the normally closed contact a of the right rotation switch (20), and as in the case of washing, the clutch ( 25) are engaged, the rotation of the torque motor main body (23) is transmitted to the output shaft (19a) via the gear (24), and the output shaft (19a) rotates.

As a result, the clockwise rotation cam (17) attached to the output shaft (19a) rotates, the claw of the cam (17) turns on the clockwise rotation switch (20) to the normally open contact side, and the dewatering motor (7) starts clockwise rotation. At this time, the retaining part (14a) of the brake arm (14) is connected to the clockwise rotation cam (17).
The brake is released when the brake piece (15) is separated from the coupling (10) by being pushed outward by the other pawl.

Then, by closing the contact of the right rotation switch (20) to the normally open contact side as described above, the power to the torque motor main body (23) is cut off, and the torque motor main body (
23) stops rotating.

On the other hand, since the solenoid (26) is energized, the torque of the driven wheel in the torque motor (19) is greater than the drive shaft torque, and this force causes the output shaft (19a) of the torque motor (19) to ) stops rotating and maintains this state.

In this manner, with the brake released, the right rotation switch (20) continues to be turned on, and the dehydration motor (7) continuously rotates in the right direction to perform the dehydration operation.

When the dehydration switch (27) is turned off by a timer (not shown) or the like, the 11
Since the 11th train also stops, the clutch (25) is released,
As a result, the brake arm (14) is rotated clockwise by the cam (1).
The force of the brake * (16) that is pressing on the brake lever (16) is transmitted to the output shaft (19a) via this clockwise rotation cam (17), and the force is transmitted to the output shaft (19a) together with the clockwise rotation cam (17).
a) Rotate.

This allows the brake arm (1
The retaining part (14a) of 4) comes off and the brake spring (16
), the brake piece (15) is pressed against the coupling (10), and brake braking is applied to the dewatering motor (7).

In addition, in the above embodiment, the left and right rotary switches (20)
(21) was designed to be directly operated by cams (17) and (18), but in order to absorb installation errors,
It is also possible to attach actuators to the left and right rotary switches (20) and (21).

In addition to mechanical switches, a non-contact switch such as an optical switch may be used as the left and right rotary switches.

[Effects of the Invention] As described above, the dehydrator operation control device and control method of the present invention can control dehydration when performing a washing operation by reversing the dehydration motor in the dehydration tank of a two-tub washing machine. The brake is applied to the inertial rotation of the motor to temporarily stop the dewatering motor before it starts rotating in the opposite direction, so there is no risk of applying a large load to the dehydrating motor when reversing starts. 2. A drastic temperature rise can be prevented and stable forward/reverse reversal operation can be obtained.

Moreover, since the brake can be applied to the dehydration motor even when the dehydration operation is finished, the operation can be ended quickly.

Furthermore, since the structure does not require the use of expensive and complicated parts such as a microcomputer, the structure is simple and inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the dehydrator operation control device of the present invention, Fig. 2 is a plan view of the above, Fig. 3 is an electric circuit diagram of the above, and Fig. 4 is a front view of the main part of the torque motor. Figure 5 is an electric circuit diagram of the same as above, Figure 6 is an overall perspective view of a two-tub washing machine, Figure 7 is a conventional dehydrator which is the main part of the same as above, Figure 8 is an electric circuit diagram of same as above, Figure 9 is The figure is a voltage waveform diagram of the speed generator same as above, and FIG. 10 is a waveform diagram of the rotation speed detection section same as above. (1)...Outer box (2)...Washing tub (3
)...Dehydration tank (4)...Dehydration tank (5)
... Bottom frame (6) ... Anti-vibration flap (7)
... Dehydration motor (8) ... Rotating shaft (9) ...
Dehydration shaft (10)...Coupling (II)
... Buji (I2) ... Dehydration hole (13)
... Brake + R (14) ... Brake arm (1
4a) (14b)...Retention part (15)...-Brake piece (16)...Brake spring (17)...Clockwise rotation cam (18)...
Left rotation cam (19)...Torque motor (19a
)... Rotation axis (20)... Right rotation switch (21
)...Left rotation switch (22)...Washing switch
(23)... Torque motor body (24)... Gear (25)... Clutch (26)... Solenoid
(27)...Dehydration, Inochi (30)...Speed generator (31)...Large switch (32)...
Start-up capacitor (33)...Microcomputer (34)...
・Human powered boat (35)...Commercial AC power supply (36)...
・Right rotation switch (37)...Left rotation switch (3
8)...Transformer (39)...Diode bridge

Claims (2)

[Claims] (1) In a two-tub washing machine that is equipped with a washing tub and a spin-drying tub, and performs washing operation by rotating the spin-drying motor in forward and reverse directions on the spin-drying tank side, and spin-drying operation by continuously rotating the spin-drying motor in one direction. A clockwise rotation cam and a left rotation cam are connected to the output shaft of a torque motor installed near the dehydration motor, and the right rotation switch and left rotation switch that rotate the dehydration motor are turned off, and the dehydration motor and the dehydration tank are connected. The right rotation switch, the left rotation switch, and the brake mechanism are engaged with the right rotation cam and the left rotation cam so that the brakes of the brake mechanism facing the connecting shaft of the brake mechanism are synchronized, and the dehydration is performed. 1. An operation control device for a dehydrator, comprising a control means for controlling the rotation of an output shaft of a torque motor so that either a right rotation switch or a left rotation switch is continuously turned on during operation. (2) In the process of washing by reversing the dehydration motor in the dehydration tank, either the right rotation switch or the left rotation switch is turned on by the rotation of the right rotation cam or the left rotation cam, energizing the dehydration motor. When the dehydration motor is turned on, the brake mechanism is released by the cam, the right rotation switch and the left rotation switch are turned off, and when the dehydration motor is not energized, the dehydration motor is braked, and the dehydration motor is continuously rotated in one direction. In the process of dehydration operation, stop the rotation of the output shaft of the torque motor, stop the rotating cam at a position where the right rotation switch or left rotation switch remains on, and release the brake mechanism. Features: Dehydrator operation control method.