JP2545187Y2 - Washing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention provides a load detecting sensor for detecting an amount of laundry, and a control for controlling a water supply amount and a washing operation of a washing time based on the amount of laundry detected by the load detecting sensor. The present invention relates to a washing machine provided with a circuit.

[0002]

2. Description of the Related Art Conventionally, the amount (weight) of laundry at the time of washing is estimated as a guide from the user's feeling and experience, whereby the water level during washing and rinsing (water supply amount), washing time, and washing water flow. Washing operation such as rinsing time etc. was determined and washing was performed by this washing operation, but it is difficult to estimate the amount of laundry accurately, so selection of water supply amount, washing time, washing water flow etc. is inappropriate It was wasted water, electricity and time, and was too easy to wash and was short.

In recent years, a load (weight) detection sensor for detecting the amount of laundry has been provided for such a device, and a control circuit has an optimum water supply amount based on the amount of laundry detected by the load detection sensor. , The washing time, the washing water flow, etc. are automatically set, and the washing machine is operated by the set washing operation so that the optimum washing according to the amount of the laundry is performed, and the water, electricity,
The problem of wasting time, washing, and rinsing was eliminated.

[0004]

However, in the case of the above-described washing machine, if the load detection sensor fails due to disconnection of the lead wire or the like, the amount of the laundry cannot be detected, and the amount of the laundry cannot be detected. It is not possible to set the optimal amount of water supply, washing time, etc., and the washing operation is performed due to an inappropriate amount of water supply, washing time, etc., and there is a risk that water, electricity, time is wasted, washing, and rinsing are insufficient. There is a disadvantage that the user continues to use the load detection sensor without noticing the failure of the load detection sensor.

The present invention has been made in view of the above-described problems, and detects a failure of a load detection sensor for detecting the amount of laundry, stops the washing operation by this detection, and causes an improper washing operation. The purpose is to prevent waste of water, electricity and time.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a washing machine according to the present invention rotates a rotating tub within a predetermined time.
Load detection sensor that detects the number of turns and the amount of laundry
And the amount of laundry detected by the load detection sensor
Control cycle to control the washing operation of the water supply amount and washing time based on
In a washing machine provided with a road, the
When there is no rotation detection of the above rotating tank by the load detection sensor
An abnormality detector that detects the failure of the load detection sensor
And the control circuit for stopping the washing operation in accordance with the detection result of the abnormality detection unit.

[0007]

In the washing machine having the above structure, the load detection sensor detects the amount of the laundry, and the control circuit performs the washing operation with the optimal water supply amount and the washing time based on the amount of the laundry. When the abnormality detection unit detects a failure of the load detection sensor, the control circuit stops the washing operation based on the detection result.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the washing machine of the present invention will be described with reference to FIGS. 1 to 4. Reference numeral 1 denotes a water tub supported by a plurality of support rods 2 on an outer tub 3 of the washing machine. And a rotary tub 4 for spin-drying independent of the above. Numeral 5 is a motor provided on the bottom outer surface of the water tank 1 to drive the rotary tank 4 ;
The motor 5 rotates the rotary tub 4 via a belt transmission mechanism 7 and a pulley 9 provided on a rotary shaft 8 of the rotary tub 4. A magnet 10 is mounted on the disk surface facing the opposite side of the rotary tub 4 of the pulley 9 at an appropriate distance from the center, and the magnet 10 controls the rotation speed of the rotary tub 4. The rotation detection switch 11 composed of a reed switch for detecting
It is provided at one point on the locus of the magnet 10 via an appropriately fixed bracket 12 so as to face the magnet 10 and be out of contact therewith.

FIG. 3 is a block diagram of a control unit for automatically moving the washing machine from a washing operation to a final dehydration operation.

The control circuit 13 includes an electronic timer 14, an arithmetic processing unit (CPU) 15, and a clock control circuit 1.
6. It comprises a memory 17 for storing the control order of various washing steps, an input buffer control circuit 18 and an output buffer control circuit 19.

[0011] External input unit 20, the device power supply switch 21 for supplying power to the whole, the lid switch 22 which is turned by detecting the closed state of closing the Rotation tank 4 to be freely opened and closed lid (not shown), It has a water level switch 23 that is turned on upon detecting a state in which the amount of washing water injected into the rotating tub 4 has reached an appropriate amount, a program switch 24 for selecting the combination of washing steps, and a rotation detecting switch 11. The on or off state of the switch is converted into theoretical values "0" and "1" by conversion elements 25, 26, 27, 28 and 29 such as flip-flops attached to each switch and input to the input buffer control circuit 18. .

The external output unit 30 includes a drain valve 31 that opens and closes when washing water is stored or drained in the rotary tub 4, a water supply valve 32 that opens and closes when washing water is supplied to the rotary tub 4, a motor 5, The drainage valve 31, the water supply valve 32, the motor 5, and the alarm 33 are provided with a switching element 34 such as a thyristor attached to each component by a signal output from the output buffer control circuit 19. , 35, 36, 37 are controlled.

In the above configuration, the arithmetic processing unit (CPU) 15 detects the amount (load) of the laundry based on how many times the signal from the rotation detecting switch 11 is input within a predetermined time. Control signals such as a water supply amount, a washing (rinsing) time, and a washing (rinsing) water flow based on the amount of the laundry are read from the memory 17, and the processes such as washing, water supply, rinsing, dehydration, and notification are determined by the control signals. A signal necessary for performing this process is output to the output buffer control circuit 19, and the drain valve 31, the water supply valve 32,
The motor 5 and the alarm 33 are controlled. The transition of these steps is controlled by the electronic timer 14.

The number of signals input from the rotation detection switch 11 within a predetermined time period is large when the amount of laundry is large, so that the number of signals is small, and when the amount of laundry is small, the number of signals is small. Therefore, it is possible to judge the amount of laundry based on the number of signals, and a water supply amount suitable for the amount of laundry,
The washing operation can be performed in the washing time.

If the rotation detecting switch 11 breaks down due to disconnection of a lead wire or the like, a signal from the rotation detecting switch 11 is output within a predetermined time by an arithmetic processing unit (CPU).
The arithmetic processing unit (CPU) 15 determines that the rotation detection switch 11 is out of order, stops the washing process, and notifies the abnormality with the alarm 33.

[0016]

[Effects of the Invention] Since the washing machine of the present invention has the above-described configuration, a load is lost due to disconnection of the lead wire of the load detection sensor.
The rotation detection of the rotating tank is not performed by the load detection sensor.
Improper washing operation by the failure Una, that is, the amount of laundry
Inappropriate water supply because the optimal amount of water supply and washing time cannot be set
It is possible to prevent the washing operation from being performed depending on the amount, the washing time, and the like, thereby preventing waste of water, electricity, and time, washing, and insufficient rinsing.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a washing machine of the present invention.

FIG. 2 is an enlarged view of a main part of the washing machine of the present invention.

FIG. 3 is a block diagram showing a control circuit of the washing machine according to the present invention;

FIG. 4 is a flowchart illustrating an operation of the washing machine according to the present invention when an abnormality is detected.

[Explanation of symbols]

 Reference Signs List 10 magnet 11 rotation detection switch 13 control circuit 15 arithmetic processing unit 17 memory 33 alarm

Claims (1)

(57) [Scope of request for utility model registration] A load detecting sensor for detecting an amount of the laundry based on the number of rotations of the rotating tub within a predetermined time ; and a water supply amount and a washing amount based on the amount of the laundry detected by the load detecting sensor. In a washing machine provided with a control circuit for controlling a washing operation for a time, the rotation by the load detection sensor is performed within the predetermined time.
A washing machine comprising: an abnormality detection unit that detects a failure of the load detection sensor when the rotation of the tub is not detected; and the control circuit that stops the washing operation based on a detection result of the abnormality detection unit.