JPH0220279B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an agitation type washing machine in which a washing drive motor is operated in forward and reverse directions to oscillate and agitate items to be washed.

[Conventional technology]

Figures 3, 4, and 5 are, for example, published in Japanese Patent Publication No. 59
These are a vertical cross-sectional front view, a cross-sectional bottom view, a configuration diagram of a control system of the conventional device, and a flowchart for explaining the operation, which show a conventional stirring type washing machine disclosed in Publication No. 151991, and will be explained below with reference to the drawings. In FIGS. 3A and 3B, 1 is the outer box of the washing machine, 2 is the washing tank fixed inside the outer box 1 and performs washing, and 3
is a main shaft that is watertightly inserted into the center of the bottom of the washing tank 2 and is rotatably supported by a main bearing 4;
5 is a stirring blade attached to the main shaft 3 in the washing tank 2, 6 is a pulley attached to the lower end of the main shaft 3, and the pulley 6 has a plurality of detection holes 7 for detecting the rotation angle of the stirring blade 5. are provided circumferentially at predetermined intervals. Reference numeral 8 denotes a rotation angle detector, which is composed of a light emitting part 9 and a light receiving part 10. Light from the light emitting part 9 is received by the light receiving part 10 at the position of the detection hole 7 of the pulley 6, and the rotation angle of the pulley 6, that is, the stirring blade is detected. A number of pulse signals corresponding to the rotation angle of 5 are emitted from the light receiving section 10. 11 is a washing drive motor attached to the lower part of the outer box, 12 is a pulley attached to the motor 11, and 13 is a belt connecting the pulleys 6 and 12. The rotation of the motor 11 is transmitted to the stirring blade 5 via 6, 12 and a belt 13.

FIG. 4 shows the control system of the above-mentioned apparatus, and 14 is a control circuit, which is composed of a memory 15, an arithmetic processing unit 16, an input control 17, and an output control 18. Power is connected. The rotation angle detector 8 detects the rotation angle of the stirring blade 5, and this detection signal is inputted to the control circuit 14 via the input control 17, processed and calculated by the memory 15 and the arithmetic processing unit 16, and outputted. It is applied as a control signal to the motor 11 via the control 18, and this output causes the motor 11 to
is rotated right and left.

FIG. 5 is a flowchart illustrating the operation of the above device, particularly the control system. Step 100 is a forward/reverse operation flag for the motor 11. Step 101 is a rotation angle setting section for setting the rotation angle (energization angle) of the stirring blade 5. A pulse number N corresponding to the rotation angle is set, and this value is set in step 102. is placed in register X. Step 103 is a forward/reverse operation switching unit for the motor 11, and step 106 is a counter that counts the rotation angle (number of pulses from the rotation angle detector 8) of the stirring blade 5 when the motor is energized, and the value is stored in the register T. is input. Step 107 is a comparison section that compares whether the rotation angle of the stirring blade 5 has reached the set value N, and step 109 is a comparison section that compares whether the rotation angle of the stirring blade 5 has reached the set value N.
A stop determination section, step 110, which determines that the stirring blade 5 has stopped due to the disappearance of the pulse signal from the motor is a forward/reverse operation setting section for the motor.

The conventional agitating type washing machine is constructed as described above, and the items to be washed, water and detergent are stored in the washing tank 2, and the power switch 19 is turned on. Step 1
At 00, the flag F= for executing clockwise rotation of the motor 11.
1, and in step 101 the rotation angle pulse number N of the stirring blade 5 is set, and in step 102 that value is entered into the register X. Step 10
Since F=1 in the forward/reverse operation switching section 3, the process proceeds to step 104, where the motor 11 rotates clockwise, the stirring blade also rotates clockwise via the pulley 6, and washing is started. At the same time, a pulse signal is generated from the rotation angle detector 8. This pulse signal is counted by the counter in step 106 and placed in the T register, and in step 107 the contents of register T and register X are compared, and if T<X, the process returns to step 103 and the motor 11 continues to operate in the right direction. do. On the other hand, T≧X
If so, the power supply to the motor 11 is cut off in step 108, and in step 109, the pulse signal from the rotation angle detector 8 disappears, and it is confirmed that the stirring blade 5, which was rotating due to inertial force, has almost stopped. ,
At step 110, F=1, so step 1
Proceed to step 11, set F=0 to drive to the left,
At step 113, the T register is set to 0, and the process returns to step 103. This time, since F=0, the process advances to step 105, and the motor 11 starts operating in the left direction. Thereafter, the program proceeds in the same way as the rightward operation, and the stirring blades 5 repeat reciprocating motions and continue washing until the power switch 9 is shut off.

[Problem that the invention seeks to solve]

In the above-mentioned conventional stirring type washing machine, when a predetermined amount of the items to be washed, water and detergent are put into the washing tank 2, and the power switch 19 is turned on to start washing, the stirring blades 5 respond to a preset number of pulses N. The motor 11 is energized and driven in the clockwise rotation direction until the rotation angle is reached, and then the inertia rotation starts, and when the inertia rotation almost stops, the rotation angle motor 11 is energized and driven in the counterclockwise rotation direction in the same way as described above. be done. Similarly, the stirring blade 5 is always pulsed with a pulse number N until the power switch 19 shuts off.
It was designed to rotate forward and backward at the same energized drive rotation angle corresponding to the rotation angle, shake and stir the items to be washed, and wash the items to be washed.

For this reason, when the amount of items to be washed is close to the rated capacity, that is, there are many items to be washed, it takes time for the items to be washed near the water surface of the washing tank 2 to be fully immersed in water, and the movement of the items to be washed is slow during that time. after that,
The items to be washed near the water surface gradually become submerged in water and become more mobile, and when the items to be washed are submerged in water, the stirring blade 5
Due to the movement of the liquid, it is vigorously shaken and stirred.

Also, when air accumulates while washing and the items to be washed remain floating on the water surface, or when new items are put in while washing, the movement of items near the water surface becomes difficult.

As mentioned above, with conventional agitator-type washing machines, when the amount of items to be washed is relatively large, it takes time for the items to be washed near the water surface of the washing tank to be fully immersed in the water surface, and during this time, the items to be washed do not move easily, resulting in poor cleaning efficiency. was wrong. With conventional agitation-type washing machines, it is conceivable to set the agitation blades to move vigorously in advance so that even when there are many items to be washed, the items near the water surface are immersed in water in a short time. If the stirring blades are kept moving vigorously from start to finish, the oscillating agitation of the laundry will increase the fabric's wear and tear, and will also put strain on the motor and mechanical parts. In order to avoid this, the capacity of the motor must be increased and the strength of the mechanism must be increased, which leads to higher costs.

This invention was made in order to solve this problem, and it is possible to obtain an agitation type washing machine that allows the items to be washed near the water surface to be quickly immersed in water even when the amount of items to be washed is relatively large, and has high cleaning efficiency. purpose.

[Means for solving problems]

The stirring type washing machine according to the present invention has first and second
A control section is provided which has a time setting section for setting a predetermined time for washing, and a rotation angle setting section for setting the rotation angle of the stirring blade into two types, large and small. The rotation angle of the stirring blade is increased, and after a predetermined time has elapsed, the rotation angle of the stirring blade is decreased for a second predetermined time period, and after this second predetermined time period has elapsed, the rotation angle is alternately increased as necessary. , which causes small changes.

[Effect]

In this invention, the stirring blade has a large rotation angle for a predetermined time at the start of washing and also thereafter as needed, so that the items to be washed are vigorously oscillated and stirred.
Even when there is a large amount of items to be washed, items on the surface of the water are quickly immersed in the water, allowing all items to be washed to move more easily, increasing cleaning efficiency and reducing cleaning time.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram showing an embodiment of the present invention;
FIG. 2 is a flowchart for explaining the operation. Note that the hardware configuration of this example is the third one.
It is the same as that shown in FIG.

In Figure 1, 2, 5, 8 and 11 are the third
The washing tank, stirring blade, rotation angle detector, and motor are the same as those shown in Figures 4 and 4. 2 is each control means 21 to 29 executed by the control circuit 14 in FIG.
21 is a rotation angle counting unit 22 that counts pulses from the rotation angle detector 8, and a rotation angle counting unit 22 is a control unit consisting of a stirring blade 5
_The first rotation angle N ₁ is larger than the second rotation angle N ₂ , that is, the relationship _{N 1 >} N ₂ It is in. Reference numeral 23 indicates a time setting unit for setting the first and second predetermined times M ₁ and M ₂ , and 24 indicates whether the elapsed time after the start of washing has reached the first and second predetermined times M ₁ and M ₂ . A time determination unit 25 inputs the signal from the time determination unit 24 and the signals from the rotation angle counting unit 21 and the rotation angle setting unit 22 to determine whether the rotation angle of the stirring blade 5 is the set angle N at a predetermined time. ₁ or
The rotation angle determination unit that determines whether or not N ₂ has been determined outputs a signal when the set angle is reached, and motor 1
1 by operating the motor energization cutoff section 26. 27 is an inertial rotation setting section that sets a state in which the stirring blade 5 is rotating due to inertia after power is cut off to the motor 11, so this inertial rotation is almost stopped; 28 is a setting value of this inertial rotation setting section 27; An inertial rotation determining section 29 determines whether or not the stirring blade 5 has arrived based on a signal from the rotation angle counting section 21, and 29 is a motor energization reversing section that reversely rotates the motor 11 based on a signal from this determining section.

Furthermore, in the flowchart of FIG.
13 is the same as the conventional device.

In FIG. 2, step 200 is a rotation angle setting section that sets the rotation angle for drive rotation by energizing the motor, and the number of pulses N ₁ ,
_N2 is set. Here, N ₁ is the initial pulse and N ₂ is the normal pulse, with the relationship N ₁ > N ₂ ,
N ₁ =8, N ₂ =6. (Note that the rotation angle of the stirring blade 5 per pulse is 30°). Step 201
Step 202 is an initial time setting section that sets a predetermined time M ₂ from the start of washing, and step 202 is a normal time setting section that sets a predetermined time M ₂ for normal reciprocating rotation operation, where M ₁ = 2 minutes and M ₂ = 2, respectively. minute is set.

The values set in steps 200, 201, and 202 are stored in registers X1, X2, and Y1 in steps 204, 205, and 206, respectively, and in register Y2 in step 207.
The sum of the values of M1 and M2 set in step 2 is input. Step 208 is a time counter that counts time and is input to register C. Step 20
9 is an initial time determination unit that determines whether the time from the start of washing has reached the initial time; step 210 is a time determination unit that determines whether the time has reached the sum of the initial time and the normal time; steps 212 and 213; are an initial angle determination unit and a normal angle determination unit that determine whether the rotation angle of the stirring blade 5 has reached the set values N ₁ and N ₂ , respectively. Note that step 109 is an inertial rotation determination section that determines whether the inertial rotation of the stirring blade has almost stopped based on the conditions set by the inertial rotation setting section 22. If this does not occur within a predetermined time of 200 ms, it is assumed that the stirring blade 5 has almost stopped.

Next, the operation of the apparatus configured as described above will be explained. The items to be washed, water and detergent are stored in the washing tank 2, and the power switch 19 is turned on.In step 100, the flag F for executing the clockwise rotation of the motor 11 is set to 1, and in step 200, the initial rotation angle of the stirring blade 5, N ₁ =8 and normal rotation angle N ₂ =
6, in step 201 the initial time M ₁ = 2 minutes and the normal time M ₂ = 2 minutes are set, and in step 2
At 04, 205, 206, and 207, the initial rotation angle N ₁ , the normal rotation angle N ₂ , the initial time M ₁ , and the sum of the initial time M ₁ and the normal time M ₂ are stored in the register X.
1, X2, Y1, Y2.

In the motor forward/reverse switching section in step 103, F=
1, the process proceeds to step 104, where 11 rotates clockwise, and stirring blade 5 also rotates clockwise via pulley 6, starting washing. At the same time, time is counted in step 208 and entered in register C. Furthermore, a pulse signal is generated from the rotation angle detector 8 as the stirring blade 5 rotates, and this pulse signal is counted by the counter in step 106 and input into the T register. Proceeding to the initial time determination section of step 209, the contents of register C and register _Y1 are compared, that is, it is compared whether the time from the start of washing is within the predetermined time of 2 minutes, and since it is within 2 minutes, step 212 is performed.
Proceed to the initial angle determination part of register T and register
Compare _{the contents of} Continue exercising. T
≧X1, that is, when the rotation angle of the stirring blade 5 reaches the set angle, that is, 240°, step 108
Then, the motor 11 is de-energized and the stirring blade 5 enters inertial rotation. In step 109, it is checked whether the stirring blade 5, which was rotating due to inertia, has stopped due to the disappearance of the pulse signal from the rotation angle detector 8.
Proceeding to step 110, since F=1, in step 111 F=0 and left rotation is set, and in step 113 register T is set to 0.
Return to This time F=0, so step 10
Proceed to step 5 and start the counterclockwise rotation movement. Thereafter, the program proceeds in the same manner as the rightward operation, and the stirring blade 5 repeats the forward rotation movement, swinging and stirring the items to be washed, and washing.

Then, for 2 minutes from the start of washing, the stirring blade rotates back and forth at an energization rotation angle of about 240 degrees, and after 2 minutes, the process proceeds to the time judgment section of step 210, where the contents of register C and register _Y2 are read. Compare, and if it is less than 4 minutes, determine whether the rotation angle of the stirring blade 5 has reached the normal pulse N ₂ set in the rotation angle setting section,
The stirring blade 5 rotates back and forth at an energized rotation angle of about 180 degrees. If the desired washing time exceeds 4 minutes, the register C is set to 0 in step 211, so that the stirring blade 5 performs reciprocating rotation at an energized rotation angle of approximately 240 degrees for 2 minutes again.

In other words, for two minutes from the start of washing, the stirring blades 5 perform a reciprocating rotational movement with an energized rotation angle of about 240 degrees, vigorously shaking and stirring the items to be washed, so that items to be washed near the water surface are quickly absorbed by the detergent solution and submerged under the water surface. Soak. When two minutes have elapsed since the start of washing, the stirring blade 5 swings and stirs the object to be washed by a reciprocating rotational movement at a small energized rotation angle of approximately 180 degrees. Since the items to be washed have already become immersed in the detergent liquid and are submerged under the water surface, even the small movement of the stirring blades 5 can sufficiently oscillate and stir the items. Then, after 4 minutes have elapsed from the start of washing, the movement of the stirring blade 5 becomes a reciprocating rotational motion with a large rotation angle, and the items to be washed are vigorously oscillated and stirred. Therefore, if air accumulates in the items to be washed and they float to the surface of the water during the washing process, or if new items to be washed are added during the washing process, it is necessary to turn off the power switch during the washing process. Stirring blade 5 periodically until 19 turns off.
Since the movement of the detergent becomes more rapid, the items to be washed near the water surface are effectively blended with the detergent solution and immersed under the water surface, so any item to be washed can be washed evenly without any sagging.

In the above embodiment, the energization rotation angle is determined by the number of pulses.
N ₁ = 8, N ₂ = 6, and furthermore, it is 2 from the start of washing.
Although the number of pulses N ₁ = 8 and N 2 were set alternately in the division period, the number of pulses N 1 = 8 and N ₂ was set alternately, but it is not limited to these setting values, and it is possible to obtain practical cleaning power without putting strain on the mechanism or motor. It goes without saying that the design is appropriately designed to rotate the stirring blades in a reciprocating manner, taking into account the shapes of the stirring blades and the washing tank, and the resolution of the rotation detector is also taken into consideration.

Furthermore, although the rotation angle of the stirring blade is detected directly from the rotational state of the stirring blade, the present invention is not limited to this, and it may also be detected indirectly from the rotational state of the drive motor, which limits the detection means. isn't it.

The main purpose of the present invention is to set the agitating blade to perform reciprocating rotational movement at a larger rotation angle than usual during the initial stage of washing and for a suitable predetermined time thereafter, and is not intended to limit the time itself. Furthermore, although the time is set using a time counter, the same effect can be obtained by providing a counter that counts the number of reciprocating rotations of the stirring blade, and changing the rotation angle of the stirring blade after how many times the stirring blade has made a round trip. .

〔Effect of the invention〕

As described above, in the present invention, washing is not performed by shaking and agitating the items to be washed while keeping the reciprocating rotation state of the stirring blade constant until the end of washing as in the past, but at the beginning of washing and even afterwards. The stirring blades are used to oscillate and agitate the items to be washed with large reciprocating rotation angles, and even when there is a large amount of items to be washed, items distributed above the water surface or items that float to the surface can be quickly absorbed into the water. Because it is submerged under water, the items to be washed can move more easily, increasing cleaning efficiency, reducing washing time, and cleaning with less damage to fabrics.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 is a flowchart for explaining its operation, and Fig. 3 is a vertical sectional front view and a cross sectional view showing a conventional stirring type washing machine to which this invention is applied. The bottom view, FIG. 4 is a block diagram showing the hardware configuration of the control system, and FIG. 5 is a flowchart for explaining the conventional control operation. Code 2... Washing tank, 5... Stirring blade, 6... Pulley, 7... Detection hole, 8... Rotation angle detector, 1
1... washing drive motor, 14... control circuit,
15...Memory, 16...Arithmetic processing unit, 17...
...Input control, 18...Output control, 22...Rotation angle setting section, 23
...Time setting section, 24...Time judgment section, 25...
Rotation angle determination section, 27...Inertia rotation setting section. still,
In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A washing tank, a stirring blade rotatably supported by the washing tank, a motor that rotationally drives the stirring blade,
In the stirring washing machine, the stirring type washing machine includes a rotation angle detector that detects the rotation angle of the stirring blade, and a control section that controls the forward and reverse rotation of the motor based on a detection signal from the rotation angle detector. ,
a time setting unit that sets second predetermined times M ₁ and M ₂ ;
This setting value M ₁ or
a time determination unit that determines whether or not M ₂ has been reached; a rotation angle setting unit that sets different first and second rotation angles N ₁ and N ₂ (however, N ₁ > N ₂ ) of the stirring blade; After the start of energization to the motor according to the signal from the rotation angle detection section, the rotation angle is changed to the first rotation angle N ₁ for a first predetermined time M ₁ after the first predetermined time M ₁ , and then for a second predetermined time. During M ₂ , it is determined that the second rotation angle N ₂ has been reached, and after the first and second predetermined times M ₁ + M ₂ have passed, it is determined that the rotation angles N ₁ and N ₂ have been reached alternately as necessary. An agitation type washer comprising: a rotation angle determination section that cuts off power to the motor when the agitation blades have stopped, and operates the motor in the reverse direction when the agitation blades have substantially stopped.