JPH04259492A - Fully automatic washing machine - Google Patents

Abstract

PURPOSE:To enable rinsing operation to be performed under a proper water overflow with simple constitution in a full automatic washing machine. CONSTITUTION:A full automatic washing machine is equipped with a feed valve 18, a water level sensor 9, a drive motor 19 and a rinsing control section. At the time of rinsing operation, the rinsing control section actuates the aforesaid feed valve 18 to supply water, and when water level data sent from the water level sensor 9 reaches a prescribed level, the drive motor 19 is actuated. Thereafter, when the variation of the water level data from the water level sensor 9 is less than the prescribed level, the rinsing control section starts counting rinsing time. After the passage of the counted time, the rinsing control section stops the operation of the feed valve 18 and drive motor 19.

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 its washing operation.

0002

[Prior Art] Fully automatic washing machines perform a rinsing operation while supplying water after a washing operation.
By overflowing the water in the tank,
This enables efficient rinsing with cleaner water. This rinsing operation is started by activating the drive motor when the water supply amount reaches a set level, and is completed by stopping the drive motor and closing the water supply valve after a predetermined time from the start. , such a rinsing process is repeated multiple times to proceed to the next dehydration process.

0003

[Problem to be Solved by the Invention] However, in the above case, if there is a change in water pressure during water supply and the amount of water supplied decreases, the rinsing operation ends before the water level reaches the overflow level. There was a problem that an efficient rinsing operation could not be performed during overflow.

[0004] As a method to solve this problem,
No. 3-29693 discloses that an overflow water level is also set, and the water supply is stopped after a predetermined time from the time when that water level is reached, so that the rinsing operation can be performed while reliably overflowing.

However, in this conventional example, two pieces of water level sensor data are required, increasing the memory capacity, and it is necessary to change the data each time the accuracy of the water level sensor varies or the structure changes, making it difficult to standardize the data. There was a disadvantage.

[0006]

[Means for Solving the Problems] This invention provides a fully automatic washing machine with a water supply valve, a water level sensor, a drive motor, a water supply valve that supplies water during a rinsing operation, and a water level from the water level sensor. When the data reaches a set level, the drive motor starts operating, and when the amount of change in the water level data from the water level sensor becomes smaller than the set level, a rinse time count is started, and the count time elapses. The present invention is configured to include a rinsing control section that later stops the water supply operation of the water supply valve and the operation of the drive motor.

[0007]

[Operation] 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 rinsing time count starts, and after the count time elapses, the water supply operation of the water supply valve and the drive motor start. Since the rinsing operation is stopped, the rinsing operation is reliably performed with overflow.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a fully automatic washing machine according to the present invention, and the overall structure will be briefly explained with reference to this figure.

Reference numeral 1 denotes a control section including a CPU 2, ROM 3, RAM 4, timer 5, etc., and this control section 1 includes a load detection circuit 6, an input key circuit 7, and a top lid safety switch 8 for supplying input signals to the control section 1 side. , a water level sensor 9, an LED display drive circuit 11 to which an output signal from the control section 1 is given, a buzzer circuit 12, a load drive circuit 13, a power supply circuit 14, and a reset circuit 15 are connected to each other. There is. Each of the above circuits 6, 7, 11, 12, and 13 is connected to the corresponding various elements, and the load detection circuit 6 detects the number of rotations (pulses) that change during washing according to the amount of laundry. The rotation speed sensor 10 detects the load drive circuit 13 including a drain valve 17, a water supply valve 18, and a drive motor 19.
are connected to each other.

In the present invention, during the rinsing operation, the control section 1 causes the water supply valve 18 to supply water, and when the water level data from the water level sensor 9 reaches a 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, the rinsing time is started to be counted, and after the count time has elapsed, 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 explained with reference to the flowchart shown in FIG. After the washing operation is completed and the water is drained, water supply is started, and with the start of water supply, water level data from the water level sensor 9 is sequentially detected (steps 1 to 4). Then, the stored set water level data A is called up, and when the set water level data A is reached, the drive motor 19 is activated and reversal of the yoke is started (steps 5 to 8). The above set water level data A also becomes the first measured water level data A used for calculating the amount of water level change.

Next, when 5 seconds have passed since the reversal of the rotation, the measured water level data B at that time (second measured water level data for calculating the amount of water level change) is called, and the calculation A-B=C is performed. The second measured water level data B at that time is replaced with the first measured water level data A (steps 10 to 13). If the amount of change C is less than the set level, the water level change is determined in the same way after the next 5 seconds have elapsed, and if it is less than the set level, it is assumed that overflow has definitely started, and the rinsing operation time is Although not shown in the figure, as the count increases, the drive motor 19 is stopped, for example, after two minutes, the reversal of the yoke is stopped, and the water supply is stopped (step 14).
~21).

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

[0014] As mentioned above, since the count for water supply is started in the state where overflow has started,
Water is reliably supplied even after overflow regardless of changes in water pressure, etc., and an efficient rinsing operation is performed while always overflowing.

FIG. 4 is a flowchart showing an example of the washing operation of this embodiment. To briefly explain, opening of the top lid during washing is detected by a signal from the top lid safety switch 8, and then the load amount is detected. The system detects the signal from the rotation speed sensor 10 to determine whether or not laundry has been added, and changes the subsequent washing operation accordingly, and a detailed explanation thereof will be omitted.

[0016]

[Effects of the Invention] 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 count time has elapsed, the simple configuration ensures that the rinsing operation is performed with overflow, and the rinsing operation is performed efficiently. .

[Brief explanation of the drawing]

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

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

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

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

[Explanation of symbols]

1 Control section 11 Water level sensor 18 Water supply valve 19 Drive motor

Claims (1)

[Claims] 1. A water supply valve, a water level sensor, and a drive motor; during a rinsing operation, the water supply valve supplies water, and when the water level data from the water level sensor reaches a set level, the drive motor is activated. Then, when the amount of change in the water level data from the water level sensor becomes smaller than a set level, a rinse time count is started, and after the count time elapses, the water supply operation of the water supply valve and the operation of the drive motor are started. A fully automatic washing machine equipped with a rinsing control section that stops the washing.