JP3203001B2 - Fully automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine and, more particularly, to an improvement in the rinsing operation of the washing machine.

[0002]

2. Description of the Related Art A fully automatic washing machine performs a rinsing operation while supplying water after a washing operation.
By performing while overflowing the water in the tank,
Efficient rinsing operation with cleaner water is enabled. This rinsing operation is started by operating the drive motor when the water supply amount reaches the set level, and is terminated by stopping the drive motor and closing the water supply valve a predetermined time after the start. Such a rinsing step is repeated a plurality of times to proceed to the next dehydration step.

[0003]

However, in the above case, when the water supply amount decreases due to a change in water pressure in the water supply, the rinsing operation ends before the water level reaches the overflow level. There is a problem that an efficient rinsing operation while overflowing is not performed.

[0004]

[0005]

[0006]

SUMMARY OF THE INVENTION The present invention provides a water supply valve,
A water level sensor, a drive motor for driving the stirring blade , and operating the drive motor while supplying water to the water supply valve,
In a fully automatic washing machine having a rinsing control unit that performs a rinsing operation while overflowing rinsing water,
The rinsing control unit starts counting the rinsing time when the amount of change in the water level data from the water level sensor during a predetermined time becomes smaller than a set level, and based on the rinsing time count-up, the water supply valve. And the operation of the drive motor is stopped.

[0007]

When the water level reaches the overflow level and the amount of change in the water level data from the water level sensor becomes smaller than the set level, the counting of the rinsing time is started. Since the operation is stopped, the rinsing operation can be performed while overflowing.

[0008]

FIG. 1 is a block diagram of a fully automatic washing machine according to the present invention.

A control unit 1 includes a CPU 2, a ROM 3, a RAM 4, a timer 5, and the like. The control unit 1 has a load detection circuit 6 for providing an input signal to the control unit 1, an input key circuit 7, and a top cover safety switch 8. , A water level sensor 9, an LED display drive circuit 11 to which an output signal from the control unit 1 is supplied, a buzzer circuit 12, a load drive circuit 13, and a power supply circuit 14 and a reset circuit 15. I have. Corresponding various elements are connected to the circuits 6, 7, 11, 12, and 13, respectively. The load detection circuit 6 is provided with a rotation speed (pulse) that changes during washing in accordance with the amount of laundry. A rotation speed sensor 10 for detecting the load drive circuit 13 includes a drain valve 17, a water supply valve 18, and a drive motor 19.
Are connected.

In the present invention, during the rinsing operation, the control unit 1 causes the water supply valve 18 to supply water, and when the water level data from the water level sensor 9 reaches the set level, starts the operation of the drive motor 19, Thereafter, when the amount of change in the water level data from the water level sensor 9 becomes smaller than the set level, counting of the rinsing time is started, and after the lapse of the counting time, the water supply operation of the water supply valve 18 and the operation of the drive motor 19 are stopped. It has become.

Next, the rinsing operation will be described with reference to the flowchart of FIG. Water supply is started after the washing operation is completed and drainage is performed, and water level data from the water level sensor 9 is sequentially detected with the start of the water supply (steps 1 to 4). Then, the stored set water level data A is called, and when the set water level data A is reached, the drive motor 19 is operated to start the reversal of the stirring blade (yoke) (steps 5 to 8). The above-mentioned set water level data A also becomes the first measured water level data A used for calculating the water level change amount.

Next, five seconds after the reversal of the stirring blade (Yok) , the measured water level data B (second measured water level data for calculating the water level change amount) at that time is called, and AB = C
Is performed, and the second measured water level data B at that time is replaced with the first measured water level data A (steps 10 to 10).
13). If the change amount C is equal to or less than the set level, the water level change amount is similarly determined after the next 5 seconds have elapsed. Although not shown in the figure, the drive motor 19 is stopped, for example, two minutes later, and the stirring
The reversal of the wings is stopped and the water supply is stopped (steps 14 to 21).

[0013] determination of the amount of change in the above step 14 and 20, as shown in the characteristic diagram of FIG. 3, is performed based on the correlation between the frequency and the level of the water level sensor corresponding to the amount of change.

As described above, since the counting for water supply is started in the state where overflow has started,
Water supply is reliably performed even after the overflow regardless of the water pressure change of the supply water, and the efficient rinsing operation is performed while always overflowing.

FIG. 4 is a flow chart showing an example of the washing operation of this embodiment. In brief, the opening of the upper lid during washing is detected by a signal from the upper lid safety switch 8, and the load amount is then determined. It is detected by a signal from the rotation speed sensor 10 to determine whether or not the laundry is added, and the subsequent washing operation is appropriately changed, and a detailed description thereof will be omitted.

[0016]

The present invention is configured as described above, and starts counting the rinsing time when the water level reaches the overflow level and the amount of change in the water level data from the water level sensor becomes smaller than the set level, Since the water supply operation of the water supply valve and the operation of the drive motor are stopped after the elapse of the count time, the rinsing operation can be performed with overflow with a simple configuration, and the rinsing operation can be performed efficiently. .

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a fully automatic washing machine of the present invention.

FIG. 2 is a flowchart for explaining a rinsing operation.

FIG. 3 is a characteristic diagram showing a correlation between a water level and a frequency of a water level sensor.

FIG. 4 is a flowchart for explaining a washing operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control part 11 Water level sensor 18 Water supply valve 19 Drive motor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D06F 33/02 D06F 39/08

Claims (1)

(57) [Claims] 1. A rinsing operation in which a water supply valve, a water level sensor, a drive motor for driving a stirring blade , the drive motor is operated while supplying water to the water supply valve, and a rinse operation is performed while overflowing rinse water. In a fully automatic washing machine including a control unit, the rinsing control unit starts counting the rinsing time when a change amount of the water level data from the water level sensor during a predetermined time becomes smaller than a set level, A fully automatic washing machine, wherein the water supply operation of the water supply valve and the operation of the drive motor are stopped based on the count up of the rinse time.