JPS6366235B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a fully automatic washing machine.

Conventional automatic washing machines of this type are equipped with a safety switch that stops operation if the laundry is shifted to one side during the spin-drying process or if abnormal vibrations occur due to unstable installation of the machine itself. However, if this safety device operates, the washing machine will stop in the middle of the washing program, so the user will not notice that the washing machine has stopped midway until the normal washing end time has passed. Ta. In addition, with an electronic timer using a microcomputer, when the safety switch is activated, water supply, rinsing, etc.
There is also a method that automatically corrects the unevenness of the laundry by adding a drainage process, but in this method, the automatic correction starts immediately when the safety switch is activated, so it is not possible to manually correct the unevenness of the laundry. However, the disadvantages are that extra water is used and the total washing time becomes longer.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a control device for a fully automatic washing machine that can shorten washing time in the case of abnormal vibrations.

This invention provides a fully automatic washing machine that automatically performs a series of processes such as washing, rinsing, and spin-drying using a program timer, and in which the operation is stopped by a signal from a vibration detection device when abnormal vibration occurs during the spin-drying process, and the operation is kept constant. It is equipped with a control device that notifies the time and a lid switch that detects the opening and closing of the lid of the washing tub, and if the lid switch opens and closes within a preset time after the vibration sensing device stops the dehydration operation. When the dehydration operation is resumed and the lid switch does not open or close within the set time, water supply, rinsing,
The feature is that it corrects the unevenness of the laundry by adding a drainage process.

An embodiment of the invention is shown in FIGS. 1 to 3. That is, FIG. 1 is an overall block diagram of a program control device in a fully automatic washing machine. Reference numeral 1 denotes a program selection section, which is comprised of a group of setting switches for selecting a washing program. Reference numeral 2 is a state detection section that includes a water level switch that detects the water level in the washing tub, a lid switch that detects the open/closed state of the lid of the washing machine, and a safety switch that detects abnormal vibrations during spin-drying. 3 is an operation control unit that contains the control described below and several other preset programs, and controls the output load by executing a predetermined program according to the input signal, and is a microcomputer device or a logic circuit. Consists of. Reference numeral 4 denotes a load that controls a load unit 5, which is composed of a drive motor for performing a series of operations such as washing, rinsing, draining, and dewatering, a water supply solenoid valve, a drain solenoid valve, etc., using signals from the operation control unit 3. The control circuit is composed of a semiconductor switching circuit that directly controls the load section 5, and a drive circuit that converts the level of the signal from the operation control section 3 to suit the semiconductor switching circuit. 6 is an operation display section 7 consisting of a light emitting diode.
This is an operation display drive circuit which is controlled by a signal from the operation control section 3.

FIG. 2 shows the main parts of the state detection section 2, load control circuit 4, and load section 5 shown in FIG. 10 is a water supply solenoid valve, 11 is a drive motor,
12 is a drain solenoid valve, 13 is an AC power supply of 100V, 14
indicates the buzzer BZ that notifies the occurrence of abnormal vibration.
Further, 15 to 18 are drive transistors for each load 10 to 12 and 14, and 19 to 21 are drive transistors for each load 10.
-12 triacs, _R1 to _R7 are the respective resistors of transistors 15 to 18, and _R8 and _R9 are switch input resistors. Further, FIG. 3 is a flowchart of a main part of an embodiment of the present invention.

Next, the operation will be explained. By operating the program selection section 1, the control section 3 operates to drive the load section 5 to execute a series of washing, rinsing, and spin-drying steps. In that case, when the dehydration process begins, the output of the dehydration signal from the operation control section 3 turns on the transistors 16 and 17 as shown in FIG. The drain electromagnetic valve 12 is operated and dewatering operation is started. The routine of the control section 3 in this dehydration process is to continue the dehydration in the "dehydration" process and check whether the safety switch (vibration detection switch) 9 has operated in the "safety switch" process as shown in FIG. It is determined whether the dehydration time for S has elapsed in the "dehydration time" step, and if these are "NO", the process returns to the "dehydration" step, and the above-mentioned process is continued until the dehydration time has elapsed. Repeat each step. When it is determined that the dehydration time of S minutes has elapsed in the "dehydration time" step (YES), the "dehydration process is completed" and the output of the dehydration signal from the control section 3 is stopped, causing the transistors 16 and 17
and motor 1 via triaxes 20 and 21.
1 stops, the drain electromagnetic valve 12 closes, and the dewatering operation is completed and stopped. In addition, in the "safety switch" process, if the safety switch 9 operates due to abnormal vibration of the main body (YES), the signal is input as a command to the control section 3 from the resistor R ₉ in FIG. will move on to the "operation stop/notification" process. Through the operation of this step, the operation of the drive motor 11 and the drain electromagnetic valve 12 is stopped to temporarily stop the dewatering operation, and the buzzer 14 is driven for a certain period of time via the transistor 18 to notify abnormal vibration. After this "operation stop/notification" step, it is determined in the "predetermined time" step whether one minute has elapsed, and further, in the "lid switch" step it is determined whether the lid switch 8 has been opened. If the answer is "NO", the process returns to the "predetermined time" process and the process is repeated until the time elapses.

The lid switch 8 responds to whether or not the lid of the washing tub is opened or closed by the user.This switch operation is such that the user opens the lid when the buzzer 14 alerts them to abnormal vibrations and removes the laundry. This means that the deviation is corrected. Therefore, "lid switch"
When lid switch 8 operates during the process (YES), the resistance
A command signal is input to the control section 3 by _R8 , and the system waits until the switch operates to close the lid.
A step is taken to return to the "dehydration" process. On the other hand, the fact that the lid switch 8 does not operate until the predetermined time has elapsed means that, contrary to the above, the user did not notice the alarm from the buzzer 14 and did not correct the misalignment of the laundry. . In this case, it is determined that time has elapsed in the "predetermined time" step (YES), and a series of automatic correction steps are ordered. That is, in the "water supply" process, the water supply solenoid valve 10 is opened via the transistor 15 and the triax 19 to supply water to the washing tub up to a certain water level, and the "rinsing" is performed.
In the process, rinsing is performed for about 1 minute, and in the "draining" process, the drain electromagnetic valve 12 is opened to drain water. This water supply,
By rinsing, the laundry that has been piled up in the washing tub is agitated and corrected. Therefore,
After completing the "drainage" process, return to the "dewatering" process,
Dehydration is carried out until the "end of process" step.

As described above, the fully automatic washing machine control device of the present invention detects abnormal vibrations during the spin-drying process and stops the spin-drying operation within a preset time.
If the user corrects the unevenness of the laundry, the spin process continues, and if there is no manual correction within the set time, water supply, rinsing, and drainage processes are added to automatically correct the unevenness of the laundry. This has the effect of streamlining the process, shortening the washing time in the event of abnormal vibrations, and improving usability.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of the main part thereof, and FIG. 3 is a flowchart of the main part in the control section. 3... Operation control unit, 8... Safety switch, 9... Lid switch, 10... Water supply solenoid valve, 11... Drive motor,
12... Drain solenoid valve, 14... Buzzer.

Claims (1)

[Claims] 1 A main control unit that automatically performs a series of processes such as washing, rinsing, and spin-drying using a program timer, and a main control unit that detects abnormal vibrations that occur during the spin-drying process and stops the spin-drying operation. and a first control unit that performs the operations of the first control unit and notifies abnormal vibrations, and after a predetermined period of time has elapsed after the operation of the first control unit, water supply, rinsing, and drainage processes are performed to automatically shift the laundry to one side. a second control unit that restarts the dewatering operation after correction; and a second control unit that detects opening and closing of the lid of the washing tub within the predetermined time after the operation of the first control unit. A fully automatic washing machine control device equipped with a third control that restarts dehydration operation regardless of the situation.