JPH01121098A - Method for controlling dehydrating operation of fully automatic washer - Google Patents

Abstract

PURPOSE: To make a user performable efficient rinsing/dehydrating without loading too much burden to a moor and to enable the user to select suitable processing by immediately stopping dehydration when the water level increases higher than a certain specified water level during dehydration, and issuing an alarm when the dehydration is stopped more than a specified number of times. CONSTITUTION: When a low speed dehydrating process is started, a motor 8 is continuously rotated in one direction, this rotation is transmitted to a dehydrating tube 4 and an agitator 1 and dehydrating operation is started. The moisture of laundry is discharged from holes by the operation of centrifugal force due to the rotation of the dehydrating basket 4 and water is collected by a water tank 7 and drained outside a machine by a valve case 17 and drain hose 21. When the water level in the water tank 7 increases higher than a specified water level during low speed dehydration, the dehydration is immediately stopped. In this case, a controller integrated how many times the dehydration is stopped through a counter. When this value becomes a specified number of times, it is judged that dehydrating is inoperable, the result is outputted to a piezoelectric buzzer and an alarm is issued by buzzer sounds.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for controlling the dehydration operation of a fully automatic washing machine.

[Conventional technology]

Figure 3 shows a stirring-type fully automatic washing machine, and (1) in the figure shows a hollow cylindrical body with a large number of through holes (2), and vertically long agitation blades (3) on its circumferential surface. The agitator (4) as a rotor blade provided radially has a through hole (5) in the side wall in which the agitator (1) is located in the center.
This is a dehydration tank that also serves as a washing tank, and a balancer (6) using a hollow transport body is formed in the upper opening of the dehydration tank.

A water receiving tank (7) with a waterproof plate (16) provided at the upper end opening is arranged outside the dewatering tank (4), and a drain hose (7) provided with a drain valve (18) at the drain port at the bottom of the water receiving tank (7). 21) via the valve case (17).

In the figure, (8) is a motor, which is connected to a rotation transmission section (12) via a low-speed transmission mechanism of a pulley (9), (10) and a pulley (11). This rotation transmission part (
12) has a double drive shaft (12a) (12b) switched by a spring clutch machine fi (13), the outer drive shaft (12a) is connected to the dewatering tank (4), and the inner drive shaft (12) is connected to the dewatering tank (4).
b) are respectively coupled to an agitator (1).

The motor (8) has a detection means (1) for detecting its rotation speed.
4), and a water level detection means (20) is attached to the end of the pressure hose (19) rising from the valve case (17).
has been established.

Although not shown, these mechanisms are housed in an outer box via vibration isolating means, and a control bag (described later) is placed on the top of this outer box. (15), water supply valve (22), operation switch section (2
6) Place a piezoelectric buzzer (29), etc.

FIG. 4 is a block circuit diagram of the control system, in which a speed generator using a power generation mechanism is used as the rotation speed detection means (14).

Further, the water level detection means (20) includes a bellows (20C) having an iron core (20b) and a coil (20d) facing the bellows (20C) in the case (20a), and further includes a coil (20d).
0d) is connected to an oscillator (20e).

In the figure, (15) is a control device equipped with a microcomputer, which is connected to a power source (25), and is further connected to a motor (8) via a display (24), a piezoelectric buzzer (29), and an amplifier (23) to the output terminal. ), drain valve (18), water supply valve (22)
) are connected. On the other hand, the input side terminal of the control device f (15) includes the operation switch section (26), the lid unbalance and other sensors (27), the rotation speed detection means (14) and the frequency divider ( water level detection means (28) via water level detection means (28).
0) is connected.

Further, as shown in FIG. 3, the spring clutch mechanism (13) is switched by a drain valve (18), although it is not electrically coupled.

Next, the standard washing process of a washing machine with such a configuration will be explained with reference to FIG. "Washing (rinsing) - Drainage - Low speed dehydration - High speed dehydration"
It is common to repeat this pattern. The operation will be explained according to the flowchart in FIG.

Water is supplied and a specified amount of water is sent to the water receiving tank (7) and the dewatering tank (
4), the forward and reverse movement of the motor (8) is transferred to the stirring blade (
3), the laundry is stirred, and the washing (or rinsing) process is performed (step (a)).

After the specified time, the process moves to the drainage process. In this drainage process, the motor (8) is stopped, and then the drain valve (18) is stopped.
) is activated and water is drained out of the machine via the drain hose (21). On the other hand, from the valve case (17) to the pressure hose (
The control device (15) determines whether the water level detection means (20) connected via the water level detecting means (20) has reached a specified water level or below. If it is below, the process moves to the low-speed dehydration process after the specified time has passed (step (b)).

The action of the water level detection means (20) is to detect the change in pressure with the bellows (20e), detect it as a change in the "L value" of the coil (20d) arranged around the iron core (20b), and detect it as a change in the "L value" of the coil (20d) arranged around the iron core (20b). The signal is outputted to an oscillator (20e) having a frequency divider (28), and is captured by a control bag W (15) having a microcomputer via a frequency divider (28) for calculation.

When the motor (8) is continuously rotated in one direction at low speed while the drain valve (18) is operated, the pulley (9), V-belt (10), pulley (11), and rotation transmission part (12
), the dehydration tank (4) rotates together with the stirring blade (3), and the water contained in the objects is washed by centrifugal force
) is drained through. At this time, the spring clutch mechanism (13) is switched along with the operation of the drain valve (18).

After the specified time (step (c)) motor (8)
By rotating at high speed, the process shifts to high-speed dehydration. After a specified time, the high-speed dehydration process ends and the next process begins (step (d)).

Incidentally, FIG. 7 shows examples of rotation of the dehydration tank (4) for low-speed and high-speed dehydration. This figure 7 shows the motor (8) for low speed dehydration.
This is an example obtained by using a 4-pole induction motor and converting the frequency of the power supply to 1/3 of that at high speed.

[Problems to be solved by the invention] Recent washing machines are required to be larger and have a larger capacity. However, on the other hand, installation space is limited, and in order to meet the above-mentioned large capacity, the dehydration tank (4), which also serves as a washing tank, is enlarged, but the outer box is not large, and the water receiving tank (7) However, there is a limit to how large it can be made. As a result, the gap between the water receiving tank (7) and the spin-drying washing tank (4) naturally becomes narrower, and the amount of water drained during spin-drying increases due to the increasing number of people carrying laundry and diversifying the amount of laundry. Deterioration of drainage conditions (long hoses, high-position drainage) can cause dewatering to stop midway, rinsing to be incomplete, motor temperature to rise excessively, and the drainage process to take a long time. This will cause problems.

In particular, the water level between the dehydration tank (4) and the water receiving tank (7) temporarily rises, causing the dehydration tank (4) to stir it up and entrain a large amount of foam. Not only will the rotational speed of motor (4) not increase, but there is a risk that an excessive load will be placed on motor (8).

Further, if dehydration is stopped midway, rinsing is not performed sufficiently, and the user determines that there is a malfunction and should contact a service person or the like.

The purpose of the present invention is to eliminate the inconveniences of the conventional example, to perform efficient rinsing and dehydration without placing an excessive burden on the motor, and to issue an alarm in response to a malfunction. The object of the present invention is to provide a method for controlling the dehydration operation of a fully automatic washing machine, which allows the user to take appropriate steps without worrying about the above.

[Means for solving problems]

In order to achieve the above object, the present invention provides a fully automatic washing machine in which a dewatering tank is provided in a water receiving tank, a rotor is provided in the dehydrating tank, a water level detecting means is provided in the water receiving tank, and the output thereof is introduced into a control device. In the machine, the water level is detected by the water level detection means during the dewatering process, and if the water level exceeds a predetermined level, the dewatering is stopped by the output from the control device, and after the water is drained, dewatering is performed again. The gist of this system is to issue an alarm using an output from the control device when the number of dehydration stops reaches a predetermined number.

[Effect]

According to the present invention, 2. During dewatering, if the water level rises above a certain specified water level, the dehydration is immediately stopped, the water is drained again, and after the water level has fallen below the drain reset water level, the dehydration is resumed after the specified time has passed. Works to recover.

As a result, efficient rinsing and spin-drying can be achieved at low cost without placing an excessive burden on the motor and without causing problems such as stopping midway through spin-drying.

In addition, if spin-drying is stopped more than a specified number of times, an alarm is generated, thereby informing the user that the washing machine is operating normally and not due to a malfunction.

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

FIG. 1 shows a method for controlling the dehydration operation of a fully automatic washing machine according to the present invention.
It is a flow chart showing an example. The configuration of the fully automatic washing machine used in the method of the present invention is shown in FIG.
Since it is the same as that shown in FIG. 4, the explanation will be omitted.

Water is supplied and a specified amount of water is sent to the water receiving tank (7) and the dewatering tank (
4), it controls the forward and reverse operation of the motor (8), the pulley (9), the V-belt (10), and the pulley (
11), the stirring blade (
3), stir the laundry, wash (or - rinse)
The process is carried out (step (a)).

After the specified time, the process moves to the drainage process. In this drainage process, the motor (8) is stopped, and then the drain valve (18) is stopped.
) is activated and water is drained out of the machine via the drain hose (21). On the other hand, from the valve case (17) to the pressure hose (
The control device (15) determines whether or not the water level has reached a specified water level or below (RESET) using the water level detection means (20) connected via the If it is below the water level, after a specified time has passed (step (b)), the process moves to a low-speed dewatering process.

Everything up to this point is the same as before. After the drainage process is completed and the transition to the low-speed dewatering process begins, the motor (8) continuously rotates in the negative direction, and this rotation causes the pulley (9) and V-belt (10) to rotate in the negative direction.
, through the pulley (11) and the drive shaft (12a) (12b) of the rotation transmission part (12) (7) to the dehydration tank (4).
is transmitted to the agitator (1), and dewatering operation starts. Moisture in the laundry is discharged from the through hole (5) by centrifugal force due to the rotation of the dewatering tank (4), and the water is collected in the water receiving tank (7), then the valve case (7) and the drain hose (21).
The water is drained outside the machine.

During low-speed dewatering (for example, 300 rpm), if the water level in the water tank (7) rises above the specified water level (for example, Ls in Figure 2) (step (to)), dewatering is immediately stopped (stept)), and the water is drained. When the water level drops below the specified water level (for example, LR), after a certain period of time (step (1)
month), return to slow dehydration.

When stopping the dehydration of the step, the control device (15)
is accumulated by a counter (G), and when this (G) value reaches a specified number of times, for example, 3 times (step (H)), it is determined that dehydration is impossible, and the output is output to the piezoelectric buzzer (29) and the buzzer is activated. Gives an audible alarm. This warning may be issued by flashing a lamp on the display (24).

In response to this alarm, the user takes action such as reducing the amount of laundry.

During low-speed dehydration, if the specified water level (for example, L!) is below, after the specified time has passed, high-speed dehydration (for example, 900 rpm)
Move on to the process (step (c)).

The high-speed dehydration process is also similar to the flow of the low-speed dehydration process (steps (l), (d), (t) to (n)). When the high-speed dehydration is completed, the dehydration process will end. (E)
) Move on to the next process.

In addition, the water level in the water receiving tank (7) is the same as that of the valve case (1).
7) A coil (20d) arranged around the iron core (20b) with a bellows (20c) detects the change in pressure by a water level detection means (20) connected via an i-pressure hose (19). It is detected as a change in the rL value of , and is output to an oscillator (20e'') having an LC oscillation circuit, which is captured by a control device (15) having a microcomputer via a frequency divider (28), and is calculated and sent to the drive unit. (motor(
8), etc.), the control device (15) has a water level detection means (2) as shown in Figure 2.
0) is input, and the control device (15) gives instructions based on this.

〔Effect of the invention〕

As described above, in the dewatering operation control method of the present invention, a dehydrating tank is provided in a water receiving tank, a rotary blade is provided in the dehydrating tank, a water level detecting means is provided in the water receiving tank, and the output thereof is introduced into a control device. In fully automatic washing machines, even if the dehydration tank that doubles as the washing tank is enlarged to increase capacity and the gap between the dehydration tank and the water receiving tank becomes narrow, it can be done without putting an excessive burden on the motor. It is possible to correct washing failures caused by stopping midway through spin-drying and realize efficient rinsing and spin-drying at low cost.

Further, by issuing an alarm, it is possible to prevent a misjudgment of a malfunction, thereby eliminating the need to make unnecessary calls for service.

[Brief explanation of the drawing]

FIG. 1 shows a method for controlling the dehydration operation of a fully automatic washing machine according to the present invention.
Flowchart showing the embodiment, Fig. 2 is a characteristic diagram showing the output characteristics of the water level detection means, Fig. 3 is a longitudinal cross-sectional side view of the stirring type fully automatic washing machine, Fig. 4 is a block circuit diagram of the same control system, Fig. 5 FIG. 6 is a flowchart showing a conventional example, FIG. 6 is a standard washing process diagram, and FIG. 7 is a characteristic diagram showing the rotation speed of the dehydration tank. (1)...Agitator (2)...Through hole (3)
... Stirring blade (4) ... Dehydration tank (5) ...
Through hole (6)...Balancer (7)...Water tank (8)...Motor (9)...Pulley (10)...■Belt (11)...Pulley (12) ...Rotation transmission part (12a) (12b
) - Drive shaft (13) Spring clutch mechanism (14) Rotation speed detection means (15) Control device (16) Waterproof plate (17) Valve case ( 18)... Drain valve (19)... Impulse hose (20)... Water level detection means (20a)...
・Case (20b)...Iron core <20c)
...Bellows (20d) ...Coil (20
e)... Oscillator (21)... Drain hose (2
2)... Water supply valve (23)... Amplifier (24
)...Display (25)...-Power supply (2
6)...Operation switch section (27)...Lid, unbalance and other sensors (28)...Frequency divider
(29)... Buzzer agent Patent attorney Masuo Odai N 3 Figure 5 Figure 6 Figure 7 Ginran (Ke)

Claims (1)

[Claims] In a fully automatic washing machine, a dehydration tank is provided in the water receiving tank, a rotary blade is provided in the dehydrating tank, and a water level detection means is provided in the water receiving tank, and the output thereof is input to the control device.The water level is also detected during the dehydration process. The water level is detected by the means, and when the water level exceeds a predetermined value, the dehydration is stopped by the output from the control device, and after the water is drained, the dehydration is performed again, and furthermore, the number of times the dehydration is stopped reaches the specified number of times. 1. A fully automatic washing machine spin-drying operation control method, characterized in that an alarm is issued by an output from a control device when the dehydration operation occurs.