JPH0564698A - Apparatus for controlling water discharging for wholly automatic washing machine - Google Patents

Abstract

PURPOSE:To prevent operation of washing at an abnormal water level from occurrence and to attempt to prevent water from overflow on the floor surface by detecting the abnormal water level by means of a water level sensor and discharging forcibly water for washing to the outside of a machine to a specified water level by means of a discharge pump when the abnormal water level occurs. CONSTITUTION:When a command to stop water supply is received from a microcomputor but a water supply valve 10 is out of order, as water is continuously fed, with increase in washing water level, the frequency of a water level sensor 22 changes and whether the water level reaches the water level of abnormal overflow can be judged. If judgment of 'Y' is done, a stirring blade is stopped for 2sec and the water level is detected again by means of a water level sensor 22. A detection wherein the washing water level is higher than a specified water level is repeated for more than 5 times, a pump 53 and a discharge valve 12 are driven and water is discharged out of the washing machine from a discharging hose 13. The washing water level is lowered by discharging water and when the washing water level reaches a high washing water level, the process is returned to judgment on the number of detection of the abnormal water level. It is thereby possible to prevent water from leakage on the floor surface caused by jumping up of water during washing.

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,
The present invention relates to a fully automatic washing machine with a drainage pump.

[0002]

2. Description of the Related Art A conventional fully automatic washing machine with a pump is
When water is supplied to a level higher than the prescribed washing water level due to a malfunction of the water supply valve or the like and stirring is performed, the water overflows from the upper part of the outer tub of the washing machine and leaks the floor surface.

[0003]

DISCLOSURE OF THE INVENTION The present invention eliminates the drawbacks of the prior art, and supplies water higher than a specified washing water level,
Move to the washing process and prevent washing at levels other than the prescribed water level.

[0004]

According to the present invention, the specified water level and abnormal water level for washing are detected during washing supply or during washing, and in the case of an abnormal water level, the pump motor is forcibly driven and the water in the washing tub is It is a drainage control that drains the water up to the specified water level for washing.

[0005]

[Function] The washing water level is detected by the water level sensor, and when the water level becomes abnormal, the drainage pump forcibly drains the washing water in the washing tub.

[0006]

The present invention will be described with reference to the drawings. Figure 1
It is a longitudinal cross-sectional view of a fully automatic washing machine adopting the present invention, and the operation will be described in order.
The outer tub 2 is supported by the four corner bars 21 at the four corners of the outer frame 1 by the four suspension bars 5. The hanging rod 5 is provided with an oscillation spring 4 which absorbs vibration during washing and dehydration. In the case of washing, the lid 18 is opened, clothes are put into the washing tub 3, and in response to a command from the control unit 19, the motor 20 is rotated in the normal and reverse directions after water is supplied. The rotation of the motor 20 is such that the V-belt 16 is interposed and the motor pulley 17 causes the clutch 14 to rotate.
The rotation is transmitted to the clutch pulley 15 located at. The transmitted rotation is applied by the clutch 14 to the washing tub 3 during washing.
It is located in the central part of. The stirring blade 7 for moving the clothes is rotated to wash. At the time of drainage, the motor 20 is stopped according to a command from the control unit 19, the drainage valve 12 is opened, the washing liquid in the washing tub 3 is driven through the flexible hose 52, the drainage pump 53 is driven, and the drainage hose 13 It is discharged to the outside of the machine. After the drainage, the process proceeds to the dehydration process, but the dehydration process causes the outer tub 2 to greatly shake depending on the state of the clothes. Therefore, a balancer 6 is provided above the washing tub 3 to prevent the runout.
It prevents the outer tank from swinging due to dehydration. Dehydration
The rotation of the motor 20 is transmitted to the clutch 14 via the V-belt 16 as in the case of washing, and the clutch 14 causes the washing tub 3 to rotate at a high speed. The dehydrated washing water, which is dehydrated to, is drained to the outside of the machine from the drain hose 13 by driving the drain pump 53 by operating the drain valve 12. FIG. 2 is a detailed explanatory diagram of the control unit 19 described in FIG. Timer 33, CPU 32 (central processing unit), and memory 3
1, the electronic control circuit consisting of I / O ports 29, 30
It is known that the cleaning process and the dehydration process are sequentially switched in the same manner as in the case of a timer including a timer motor and a cam switch. In the following embodiments, a block diagram will be described. The electronic control circuit 34 shown in FIG. 2 is for automatically shifting the process from the washing process by washing to the final dehydration process, and basically, as is well known, the timer 33 and the central processing unit (CP).
U) 32, memory 31, input port 29, output port 3
0, and the control command at the time of washing is issued by the central processing unit (CPU).
The PU) has a calculation unit and a control unit, and is the center of the system. Basically, fetching and decoding instructions,
Specifically, it executes arithmetic and logical operations, read / write control of the contents of designated addresses in the memory, input / output control to designated addresses to the input / output device, and control of program flow.

The memory 31 stores a program and data, and has both read and write functions.
There are two types, a ROM having only a read function. RA
M is used as a work area for storing data or assembling a program, and ROM is used when a fixed program or fixed data is put in and the same processing is performed at any time. The input port 29 and the output port 30 are circuits that mediate when data is transferred between the CPU and the input device / output device, and are generally called I / O ports. The electric command from the fully automatic washing machine is input to the input side of the I / O port, and mainly the power switch 2
3, a water level sensor 22, a lid switch 24, a program selection switch 25, a start / stop switch 26, etc. are connected. On the output side, the washing motor 20,
The water supply valve 10, the drain valve 12, the clutch solenoid 27, the alarm 28, the pump motor 53, etc. are connected, and the CP
It is controlled by the instruction of U through the interposition of the I / O port and performs a series of washing operations. Therefore, the washing machine has a timer motor and a timer composed of a cam switch.
It is controlled in the same manner as a washing machine with a timer that is controlled. The washing machine is controlled by the electronic circuit as described above.

FIG. 3 is a block diagram of a washing process in a fully automatic washing machine.

Referring to the block diagram of FIG. 3, the washing process of the fully automatic washing machine will be described in more detail with reference to FIGS. 1 and 2 and operation panel FIG. Press the switch 23 and use the program selection switch 25 to
By setting an arbitrary washing course and pressing the start / stop switch 26, the water supply in FIG. 3 is started. Water is automatically supplied from the water supply hose 11 into the washing tub 3 as washing water until the water level reaches a predetermined level. When the water level sensor 22 notifies the microcomputer that the water level has reached the specified level, washing is started. Laundry
After a certain period of time, the drain valve 12 is opened, the pump motor 53 is driven, and the wash water in the outer tub 2 is discharged from the washing machine through the drain hose 13. After the water level sensor 22 detects whether or not the washing water is completely drained, the washing water containing detergent in the clothes is dewatered by centrifugal force by moving to intermediate dehydration and rotating the washing tub 3 at a high speed. After the dehydration is completed, the first rinse is performed, so that water is supplied under the same control as for washing, and the rinse is started after the specified water amount is reached. Intermediate dewatering, rinsing and final dewatering, both at the wash and first
The same control as the intermediate dehydration and rinsing for the second time is performed, and the clothes are rinsed from the laundry and then dehydrated. FIG. 5 is a diagram showing a state set on the operation panel of FIG. 4 on the large-sized liquid crystal display plate. Hereinafter, the large-sized liquid crystal display plate will be described as an LCD.

On the LCD, the display of the washing course 46, the washing water level 47, the display 48 of the washing time, and the display 4 of the number of times of rinsing
9. There are display 51 of dehydration time, display of current time 50 and the like.
These display functions will be described with reference to the operation panel diagram of FIG. 4. By pressing the triangular arrow portion of the program selection key 25 of FIG. 4, the washing course 46 of the LCD of FIG.
The setting of the laundry course displayed in is indicated by a triangular arrow. When the program selection key in FIG. 4 is kept pressed, the display of the laundry course 46 in FIG. 5 automatically changes, and the required laundry course 46 can be set.

Next, each time the water level changeover switch 35 of FIG. 4 is pressed, the water level setting display displayed on the LCD of FIG. 5 is indicated by a triangular arrow mark, and the washing water level can be arbitrarily set and washed. ..

The LCD display of the washing time 48, the number of rinses 49, the dehydration time 51, the current time 50, etc. is set in the same manner, and thereafter, it is set by pressing the start switch 26 on the operation panel of FIG. The laundry will be started under the specified conditions.

FIG. 6 is a partially enlarged sectional view for explaining the present invention. The present invention will be described with reference to FIG. 6. In the washing tub 3, the above-described control up to the specified washing water level required for washing is performed. It is supplied from the water supply valve 10.

When the water supply valve 10 reaches the prescribed water level required for washing shown in FIG. 6, the water level sensor 22 sends water level information to the microcomputer, and the operation of the water supply valve 10 is stopped to proceed to the next washing process. It is a transition.

Even though the water supply valve 10 is controlled by the normal operation described above, the water from the water supply valve 10 is stopped even if the water supply valve 10 fails due to some trouble and receives a water supply stop command from the microcomputer. When the water level is higher than the specified water level for washing and reaches the water level for abnormal overflow, the water flows from the abnormal overflow port 55 of the outer tub 2 through the overflow hose 54, and is supplied into the drain hose 13 via the drain pump 53. The invaded water invades. At this time, if the drainage pump 53 is stopped and the drainage port of the drainage hose 13 is located at a position higher than the abnormal water overflow level of the washing machine, the drainage port 53 cannot naturally flow out of the machine. Therefore, there is a problem that the upper surface of the outer washing tub 2 flows into the washing machine and wets the floor surface and the like. In order to solve these problems, an explanation will be given with reference to the flowchart of the abnormal overflow prevention control of FIG. 7 and the relationship between the wash water level by the water level sensor 22 and the oscillation frequency of the water level sensor 22.

When started in FIG. 7, the water supply valve 12
The amount of water supplied from the water level sensor 22 in the washing tub 3 shown in FIG. 6 is detected by the fluctuation of the air pressure in the air trap 8 of FIG. 1, and the change is shown in FIG. As shown in Fig. 8, the frequency of the water level sensor 22 changes as the washing water level rises. The frequency that reaches the washing high water level in Fig. 8 is set as the high water level, and the microcomputer is informed of this frequency. It sends and controls.

In this way, the water supply amount (water level) is controlled, and the process proceeds to the next stroke. However, as described above, the failure of the water supply valve 12 makes it difficult to control the water supply state, and the water supply valve 10 supplies water. In the situation where is left out, the washing water level in the washing tub 3 rises. However, from the flow chart of FIG. 7, it is determined whether Tr56 is the prescribed water level for washing,
When r56 is reached, the next step is stirring 57.

The stirring 57 is a process in which the stirring blade 7 located in the central portion of the washing tub 3 is rotated to move the clothes to wash the clothes. However, when the water supply valve 10 fails, water is left out. In this state, the water level sensor 22 constantly detects the washing water level while rotating the stirring blade 7 with the agitation 57, and the OFT
The judgment of r58 is made.

The OFTr 58 determines whether or not the abnormal flood water level has been reached based on the relationship between the water level and the frequency shown in FIG. 8. If the abnormal flood water level frequency has not been reached, the stirring blade 7 is washed. It rotates for time and shifts to the next stroke. If OFTr58 judges "Y", stirrer blade 7 is stopped for 2 seconds and water level sensor 22 detects water level again. Then, it is determined whether the water level is higher than the specified water level for washing. At this time, if the water level is within the specified water level shown in FIG. 8 and if the above-described stroke is counted by the microcomputer and is within 5 times, the flow returns to the stroke of stirring 57 and the stirring blade 7 is rotated to wash. is there.

The detection that the washing water level shown in FIG. 8 is higher than the prescribed water level is detected in the water level abnormality detection frequency judgment step 60.
The abnormal flood water level (OF
Tr) value, the pump 53 and the drain valve 12 shown in FIG.
Drain from 3 to outside the washing machine. By draining,
In the water level judgment 63 process, it is judged whether the washing water level has reached the high washing water level (Tr), and if it reaches the high washing water level (Tr), the abnormal water level detection frequency judgment 60
It is a return.

If the same abnormal operation occurs five times or more in the abnormal water level judgment 60 stroke, the stirring blade 7 is stopped in the stirring stop 64 stroke, and the washing machine function is stopped in the function stop 61 stroke. After 60 minutes have passed, the washing machine power is automatically turned off.
It is set to F.

[0022]

EFFECTS OF THE INVENTION According to the present invention, when water is supplied above the specified water level required for selection, the water is splashed during washing because the water is forcibly drained out of the machine by the drainage pump. It is possible to prevent the water from leaking to the floor in such cases.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a fully automatic washing machine.

FIG. 2 is a block diagram of microcomputer control.

FIG. 3 is a block diagram of a fully automatic washing course.

FIG. 4 is an explanatory diagram of an operation panel.

FIG. 5 is an explanatory diagram of a process display.

FIG. 6 is a partially enlarged sectional view illustrating the present invention.

FIG. 7 is a flowchart for abnormal flood prevention control.

FIG. 8 is a relationship diagram between water level and frequency.

[Explanation of symbols]

 10 ... Water supply valve, 53 ... Drainage pump.

Claims (1)

[Claims] 1. A fully automatic washing machine automatically supplies water to control a washing water level required for washing, and the washing water is supplied to a washing machine at a water level higher than a prescribed washing water level. In this case, a drainage control device for a fully automatic washing machine, which is provided in a washing machine and forcibly drains water to a specified water level for washing with a drainage pump.