JPH0523490A - Drainage controller of washing machine - Google Patents

Abstract

PURPOSE:To surely execute the operation of a drain valve by executing an opening instruction switch and a closing instruction switch of the drain valve by a motor driving changeover switch, and setting the time spent for switch-on of both the instruction switches longer than the time spent for switching the changeover switch, in the titled device of an automatic washing machine. CONSTITUTION:When a signal is received to a drainage signal terminal 52, a triode AC switch 50 is turned on, a neutral leaf 33 and a drainage signal leaf 35 are connected, and a motor 38 turns. As a result, a cam turns clockwise, a pin 30a moves a moving piece 29 and a moving arm 43 is moved by a tension spring 45. A lip part 42a is separated thereby and water passes through. Subsequently, when the motor 38 rotates half, the neutral leaf 33 is separated from the drainage leaf 35 and opens fully a drain valve 21 and stops. Each leaf 33-35 and a leaf cam 30b in this case are constituted so that the neural leaf 33 and one leaf 34 or 35 are separated after the other is connected. When a feed water signal line 53 receives a signal, a triode AC switch 51 is turned on and operated in reverse.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain valve of an automatic washing machine, and in particular, it uses a small motor that does not generate a large impact noise when the valve is opened and closed, is almost silent, and is easy to control. The present invention relates to a highly reliable drainage control device.

[0002]

2. Description of the Related Art A conventional drainage control device collectively performs clutch on / off, brake on / off, drain valve open / close, and three functions.
The operation was performed using a large electromagnetic solenoid. Therefore, the operation sound was postponed, and there was a big sound of collision with the same metal, which was a big weak point. It should be noted that although no electromagnetic solenoid is used, a small motor is required to have a large output torque in order to perform the collective operation of the functions of the above-mentioned three parties. It is used, leading to an increase in the number of parts and a decrease in reliability.

[0003]

In the above-mentioned prior art, no consideration is given to generation of a large impact sound, complication due to increase in the number of parts, and increase in price.

The object of the present invention is to divide the drain valve to open / close, to engage / disengage the clutch, to engage / disengage the brake, and separately for each of the three operations. The drain valve uses a small synchronous motor,
The rotation position is controlled by a simple cam and contact piece.

[0005]

[Means for Solving the Problems] This is because the operating force is simply reduced to 1/3 by dividing the functions of the three parties, so that the motor may be of a smaller size and with a low output torque, and the opening and closing of the valve , In the rotation of the final output shaft, it returns to the original position in one rotation.
By opening at a so-called 180 ° half rotation and closing again at the next 180 ° half rotation (the small motor can only rotate in the same direction or both (without a reverse rotation stopper). ), Not the rotation control or the time control, but the position control, and the valve opening / closing is performed with the simple and accurate control.

[0006]

[Function] Opening and closing the valve does not cause much trouble, but
When closed, the most important predictor is the occurrence of water leaks without returning completely. This was dealt with by controlling the position of the motor rotation after allowing a margin after the valve body was closed when returning. Furthermore, in position control, the contact is switched every half rotation, but if a power outage occurs during the half rotation, or during the same, the user inputs an operation change signal or turns the power on. When the valve is turned off, for example, when the valve is being opened to drain water, the valve is stopped, and when the washing signal is immediately switched, the valve is stopped halfway open. At this time, the signal for closing the valve must be accepted, but it is difficult to use the leaf position control or to use a separate means. Therefore, this means that the valve cannot be closed and the washing operation cannot be performed. This is not true.

Therefore, in the present invention, the number of rotations of the motor is increased as much as possible to shorten the control time for half rotation, and the above-mentioned probability of malfunction due to a change in the operation signal is reduced. The rotation speed of the motor at this time is preferably 10 rpm or more. This is because the control time for half rotation is within 3 seconds, which is a short time, and therefore the operation time is longer, and the signal switching is performed after the half rotation control is completed.

The problem of power failure is not possible even with the above-mentioned measures taken within 3 seconds. For this, a capacitor having a selected capacity is provided to charge the power for 3 seconds even if the power is cut off. In addition, the work of half rotation by the given signal is finished, or the way of giving the signal is special, and from the state where the signal is received, special processing is performed and the signal of the given place There is also a method of performing an initialization operation that returns to the place. It operates based on the received signal without reading where the position control is.However, if the leaf position is in the middle and the contact for the received signal is open, only the signal is accepted as it is. Then, the motor is not rotated, and then a signal opposite to the original signal is input. In this state, since the contact is closed in this state, the motor rotates according to the signal and stops at half rotation. At this time, when the initial signal is input again, the motor is rotated based on this signal, and the motor stops at the position indicated by this signal. When sending a so-called drainage signal, put three signals (drainage signal-> water supply signal-> drainage signal) (as necessary at the beginning) to make sure that they are initialized and stop where you want them, and proceed to the next. Can be done. This takes 9 seconds in total if one signal is 3 seconds, but it can be surely performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic diagram for explaining the configuration of the entire washing machine.
1 is an outer frame made by pressing a steel plate, and a hanging rod receiver 1
It has a and foot 1b. 2 is a top cover, and the outer frame 1
It surrounds the upper surface of and has a lid 3 and a control unit 20.
An outer tank 4 is a tank for collecting washing water. An air reservoir 4a is connected to the air hose 5 and the pressure switch 6, and is configured to replace the water supplied from the water supply hole 24 with the water level by opening the water supply valve 23 in the tank for control. 4b is a hanging rod receiver which penetrates the hanging rod 7 and holds the spring 9 by the spring receiver 10 and the hook portion 7a so as to hold the spring 9. Become.
11 is a washing tub, which has a small hole and a wavy wall on the outer circumference,
When the laundry is washed by the rotating motion of 3, the washing tub itself rotates and the laundry is dehydrated by the centrifugal force.

A lower base 14 is a drive unit 18 having a main motor 15, a reduction gear, a brake, a clutch unit 18d and the like.
And is locked to the outer tub 11. A motor shaft 15a is engaged with the pulley 16 and transmits the rotation of the motor to the pulley 18C on the drive unit 18 side by the belt 17. Reference numeral 18a is a blade shaft protruding from the drive unit, and 18b is a washing tub shaft. 19 is a seal part 21 is a drain hole, and a drain valve 2
1. The drainage hose 22 is a portion for draining. 25
Is a water supply hose.

The operation of this structure will be described below.
The water supply valve 23 is opened and water is supplied by a key input signal to the control unit, and the water supply amount is judged by the pressure switch 6 as the water level to judge the water supply amount. When the main motor 15 rotates (reverses), the clutch By the action of the portion 18d, only the blade rotating shaft of 18a is driven to wash. Next, drain valve 21
Opens, drains, and by switching the clutch part 18d,
The washing tub shaft 18b is driven to rotate the washing tub 11 for dehydration. This is the operation.

The drainage valve of the present invention will be described with reference to FIG. 2 and subsequent figures. A drainage hole 4C and a water stop rib 4 are provided in a lower portion of the outer tank 4.
d, has a boss 4e, and the drain valve 21 has a screw 3 attached to the boss 4e.
6 Stop locked. 21a is a valve body portion, 21b is an overflow water receiving port, 21C is a drainage hole, 21d is a moving element, 28 is a valve element lid, 29 is an engaging element, 30 is a cam, 31
Is a motor case, which is fixed by screwing a stop foot 31a to a motor case stop 21e of the drain valve 21. Numeral 32 is a gum set screw, and numeral 30a is a pin portion engaged with the engagement element 29, which is slidably projected from the center of the cam 30.

27 is a clip for stopping the drain hose 22,
Reference numeral 33 is a neutral leaf terminal that controls the position of the half-rotating cam 30, reference numeral 35 is a leaf terminal that receives a drainage signal, and reference numeral 34 is a leaf terminal that receives a water supply signal. Reference numeral 26 denotes a joint tube, which is a connecting component for the purpose of ensuring reliable connection even with a slight water gap and center deviation.

More specifically, with reference to FIG. 3, the valve body portion 21a.
A bellows 42 has a push spring 44 sandwiched between the moving arm 43 and the lid 28, and the lip portion 42a is positioned to be water-sealed by pressing the lip portion 42b. It is locked to the valve body portion 21a by the screw portion. Reference numeral 45 denotes a pulling spring, which has a characteristic that a tip hook portion is locked to a catching portion 29C of the moving element 29 and a spring constant is made higher than that of the pushing spring 44. Reference numeral 29b is a manual valve opening hand, and even if the motor 38 becomes inoperable due to disconnection or the like, the pull valve is opened below the motor 38 for drainage. Reference numeral 29a denotes a small protrusion, which is smaller than the protrusion 30b at the tip of the pin 30a.
And to prevent the mover 29 from coming off.

Reference numeral 37 is a lead wire connecting one line for power supply of the motor 38 and the neutral leak 33, and 32 is a motor case 31.
The boss protruding from the inside of the
38a is fixed with a screw 36. Reference numeral 31b is a motor case lid having one side hook-locked with the motor case 31 by a hook action, 40 is a switch case for storing each leaf, and 41 is a dowel for moving each leaf by rotation of the cam 30. 30b is a leaf cam.

The operation of this configuration will be described with reference to FIGS.
When the signal is received at the drain signal terminal 52, the triac 50 is turned on. When the neutral leaf 33 and the drainage signal leaf 35 are connected, the motor 38 starts rotating, the cam 30 rotates clockwise in the embodiment, the pin 30a also moves the mover 29, and the spring is pushed by the push spring 44. The moving arm 43 is moved by the tension spring 45 having a constant constant. By doing so, the lip portion 42a is separated, the water seal is released, and water is allowed to pass through. The motor 38 rotates,
The dowel 41 is moved at the step of the leaf cam 30b by 180 °, so-called half rotation, and the neutral leaf separates from the drainage leaf 35 after all three lines in the state (II) are closed. Due to this separation, the rotation of the motor 38 is stopped, and the valve is stopped when it is fully opened.

Next, when a signal is received at the water supply signal terminal 53,
Since the triac 51 is turned on and the neutral leaf 33 and the water supply leaf 34 are connected, the motor 38 is also rotated, and the leaf is closed in the opposite direction to the drainage (II). The same state as the above is created, the process returns to (I), and the motor 38 stops.

The point of movement of each leaf and the movement of the leaf cam 30b cannot be separated until the leaf on the signaled side is connected to the neutral leaf only after connecting to the leaf side on which no signal is given. If the configuration is in the first condition and each signal is given to the leaf next, assuming that the time required for half rotation of the motor 38 is 3 seconds at 10 rpm, a margin of about 30% is set for about 4 seconds, and each try is performed. It is not allowed to make up signals at the same time.

That is, even if the small motor for moving the switch composed of the neutral leaf and both leaves stops due to a power failure or the like, the neutral leaf of the switch is in contact with either one of the leaves, or the neutral leaf and both leaves are together. The state of contact is taken. That is, the state where the neutral leaf is not in contact with any leaf does not occur. Therefore, after the power failure, the small switch can be turned, and the drain valve can be driven according to the washing program.

With the above-described structure and operation, a drain valve using a small motor can be easily and inexpensively produced, which is a great effect with no operating noise and high reliability.

Further, as shown in FIG. 6, the drain hole 21C is formed in the outer tank 4
By placing the drainage hose in the left-right symmetrical position, when replacing the drainage hose in the left-right direction, the clip 27 was conventionally loosened and the entire direction was changed, but the clip 27 part remains the same. There is also an advantage that it can be positioned and the reliability of the water seal part is further improved.

Next, as shown in FIG. 7, a neutral leaf (o) and a neutral leaf (o) are provided as means for solving malfunctions such as short-time signal change, power failure during rotation, and reverse input of the next signal. In the drainage signal leaf (b) and the water supply signal leaf (a), when the drainage signal is first put in the state where o-a is in contact,
Even though there is no contact between −b, as described above, the signal of triac on is input for the required time of half rotation + α by rotation. After that, when the same signal is input between o and a this time, the motor 38 is connected because this o a is in contact.
Is rotated, and it stops at a regular position by half rotation. However, the valve is closed because of o-a.
Therefore, it is achieved by inputting the drainage signal again and opening the valve with OB. Assuming that the time required for half rotation is 4 seconds, it takes 12 seconds for 3 operations, but the time cannot be extended by starting only the draining operation during the end of washing. Also, even if it takes 12 seconds, there is no problem. In particular, the first signal for each of water supply and drainage depends on the state of the leaf, but there is no valve operation, and most of them only receive a signal, and not all 12 seconds are valve operation.

The application of this drainage signal → water supply signal → drainage signal or the reverse signal does not have to be performed every time each drainage / water supply signal is required according to the program.
When it is really necessary, when the power failure during the so-called so-called motor rotation mentioned above stops when the power is turned off, for example, the valve opens halfway due to a drain signal and then stops, and the o-a contact is not closed. , It is a countermeasure for the trouble that it does not work at all even if the water supply signal is input. Therefore, in the microcomputer, at the first operation after the power is turned off, while confirming the position of the valve with this repeated signal, it is set to the normal position,
As long as the power is not turned off, the method of proceeding with the signal of drainage and the signal of water supply once from the next operation is also considered. By doing this, only the first time, it takes longer than the conventional method, but the operation It is possible to provide a drain valve without sound.

[0024]

As described above, according to the present invention, a silent drainage valve using a small motor can be controlled by a half-rotation position with a simple three-leaf structure, and great effects can be obtained in terms of noise and cost.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the overall structure of a washing machine.

FIG. 2 is a partial cross-sectional perspective view showing a drain valve installation state.

FIG. 3 is a detailed cross-sectional view of main parts for explaining the operation of the drain valve.

[Fig. 4] Fig. 4 is a diagram for explaining the movement of the cam and the leaf. (I) is a diagram before the draining operation is started, (II) is a state diagram in which all three leaves are in front of the draining operation completion, and (III) is after the completion. Then, the state diagram for getting the next water supply signal.

FIG. 5 is an electric circuit diagram.

FIG. 6 is a view showing the relationship between the drain valve position on the lower surface of the washing machine and the hose.

FIG. 7 is a diagram showing a signal input state.

[Explanation of symbols]

4 ... Outer tank, 21 ... Drain valve, 33 ... Neutral leaf, 34, 3
5 ... Leaf, 38 ... Small motor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Osugi 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Hitachi Ltd. Taga Factory (72) Inventor Tomonori Kamano 1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture 1-chome, Hitachi Ltd. Taga factory

Claims (1)

Claim: What is claimed is: 1. A drainage control device for a washing machine, wherein the opening / closing operation of the drainage valve of the washing machine is performed by the rotational force of a motor. A closing instruction circuit having a closing instruction switch, and a changeover switch for selectively switching between connection with the opening instruction circuit side and connection with the closing instruction circuit side. The time required for turning on the opening instruction switch and the closing instruction switch is set to be longer than the motor operation time required for the switching operation of the changeover switch by the rotational force of the motor. Drainage control device for the washing machine.