JPS645920B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fully automatic washing machine that automatically performs washing, rinsing, and dehydration steps.

This type of fully automatic washing machine has two methods: a method in which the rotor blades are rotated forward and backward in long cycles during the washing and rinsing processes (hereinafter referred to as the pulsator method), and a method in which the rotor blades are reversed in the forward and reverse directions in short cycles during the washing and rinsing processes. (hereinafter referred to as the agitator method).

In the pulsator system, the rotor blade rotates in a long period of 27 seconds in forward rotation, 3 seconds in rest, and 27 seconds in reverse rotation, and the rotation speed of the rotor blade during forward rotation and reverse rotation is very low.
In order to reach 400 rpm, (1) the laundry will be in contact with the high-speed rotor blades for a long time and will be easily damaged.

(2) The fabric of the laundry is so stained that it is necessary to untangle it by hand each time it is transferred to the rinsing or dehydration process, which is extremely inconvenient.

(3) Even if the spin-drying step is automatically started after the rinsing process is finished, the washing and spin-drying tub often stops due to excessive imbalance caused by the laundry being tangled in the cloth, which is extremely inconvenient.

(4) Because the laundry becomes hard and tangled, the tangled parts are not washed well, resulting in uneven washing or rinsing.

It has the following drawbacks.

With the agitator method, the rotor rotates forward and reverse slowly within 360 degrees, so there is very little chance of tangling or damage to the fabric. If you do this, it may not be possible to remove stains from the laundry sufficiently.

(b) In order to rotate the rotor in the forward and reverse directions within 360 degrees, a complicated mechanism is required, which is uneconomical.

It has the following drawbacks.

SUMMARY OF THE INVENTION In view of the above drawbacks, an object of the present invention is to provide a fully automatic washing machine which is less likely to tangle or damage fabrics and which has better cleaning power than an agitator type washing machine.

The features of the present invention include an outer tank, a washing and dehydrating tank rotatably provided in the outer tank, a rotary blade rotatably provided at the inner bottom of the washing and dehydrating tank, and a rotary blade that is rotated during washing or washing. A fully automatic washing machine comprising a washing machine motor that rotates forward and reverse during rinsing and rotates the washing/dehydration tub at high speed in one direction during spin-drying, and has a cylindrical body formed at the center of the upper part of the rotary blade. Setting the forward rotation time and reverse rotation time of the washing machine motor during rinsing to 3 seconds or less, and setting the rotation speed of the washing machine rotor during washing or rinsing to a range of 100 to 300 rpm, The advantage lies in that efficient small blades are provided on the cylindrical body.

Hereinafter, the present invention will be explained in detail based on the drawings of the embodiments. In Figure 1, a box-shaped outer frame 1 made of steel plate
Inside, an outer tank 4 made of synthetic resin is supported in a vibration-proof manner by a hanging rod 2 and a vibration-proof spring 3. Inside the outer tank 4, a washing and dehydrating tank 5 made of synthetic resin is provided. A balance ring 6 made of synthetic resin is attached to the upper end of the washing and dehydrating tank 5.
Attach by friction welding.

A large number of dehydration holes 7 are provided in the side wall of the washing and dehydration tank 5. A rotating blade 8 made of synthetic resin is provided at the center of the inner bottom of the washing and dehydrating tank 5. The rotary blade 8 includes a disk-shaped blade main body 8a, a plurality of small wing parts 8b arranged on the upper surface of the blade main body 8a, and a cylindrical body 8c protruding from the center of the upper surface of the blade main body 8a. . Wing body 8a
The plurality of small blades 8b provided on the top surface are arranged radially and at equal intervals so that the force for stirring the washing water is almost the same whether the rotor rotates forward or backward. do.

An outer tub lid 9 made of synthetic resin is attached to the upper end of the outer tub 4 to prevent laundry from falling between the outer tub 4 and the washing and dehydrating tub 5. A drainage device 10, a drive device 11 for rotating the rotary blade 8 and the washing/dehydration tank 5 are attached to the outer bottom surface of the outer tank 4 via a support base 12 made of a steel plate. The inner diameter of the outer tank 4 is in the range of 390 mm to 500 mm.

The drainage device 10 includes a drainage valve 13 connected to the inner bottom of the outer tank 4 and a drainage hose 14 connected to the drainage valve 13. The drain hose 14 is drawn out of the outer frame 1 through a hole 15 provided in the lower part of the side wall of the outer frame 1.

The drive device 11 includes a washing machine motor 16, a clutch mechanism section 17, and a transmission mechanism 18 that transmits rotation of the washing machine motor 16 to the clutch mechanism section 17. The transmission mechanism 18 is composed of a belt and a pulley. The clutch mechanism section 17 has a function of rotating only the rotary blade 8 forward and backward in the washing process and the rinsing process, and rotating the washing/dehydration tank 5 and the rotary blade 8 together at high speed in one direction in the dehydration process. There is. The clutch mechanism section 17 includes a brake device that prevents the washing/drying tub 5 from rotating during the washing process and the rinsing process and stops the rotation of the washing/drying tub 5 after the spin-drying process is completed. The washing machine motor 16 is fixed to the support stand 12 using support legs 19.

A top cover 20 made of synthetic resin and having a clothes slot 20a is fixed to the upper end of the outer frame 1. An upper lid 21 made of synthetic resin is provided on the clothing input port 20a so that it can be opened and closed or can be attached and detached. Top cover 2
A panel box 20b is integrally formed at the rear of the 0. The panel box 20b houses the washing machine motor 16, the drive device 17, a timer 23 for controlling the drain valve 13 and the water supply valve 22, a pressure switch 24, and a water supply valve 22.

The timer 23 can be operated from the front of the panel box 20b to select a washing process, a rinsing process, a dehydration process, or a combination thereof. As shown in FIG. 3, the timer 23 includes a timer motor 25 consisting of a small synchronous motor, and cam switches C ₁ , C ₂ , C ₃ , C ₄ that change the contact points by a cam plate rotated by the timer motor 25. , C ₅ , C ₆ and reversing switch
S ₁ and S ₂ , and are connected to the drain valve 13 , water supply valve 22 , washing machine motor 16 and pressure switch 24 . A manual changeover switch 26 is connected in series to the reversing switch _S2 .

The cam switches C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , and C ₆ switch their contacts according to the time chart shown in FIG. The washing process is set in a range of 10 to 5 minutes. The rinsing step should be in the range of 8 to 5 minutes.
The dehydration step is set in a range of 5 minutes to 3 minutes.

The reversing switches S ₁ and S ₂ are as shown in FIG.
The washing machine motor 16 is automatically reversed by being alternately energized. The forward rotation time and reverse rotation time of the reversing switches S ₁ and S ₂ are both set to 3 seconds or less. reversing switch
The pause time of S ₁ and S ₂ is set to 1 second or less.

The washing machine rotary blade 8 sets the rotation speed to 100 to 300 rpm in the washing process and the rinsing process, and sets the rotation speed of the dehydration tank 5 to 700 to 300 rpm in the dehydration process.
Set to 1000rpm.

The outer diameter of the rotary blade 8 of the blade body 8a is set in the range of 200 to 350 mm. The height of the rotary blade 8 (dimension from the inner bottom surface of the washing and dehydration tank 5 to the top of the cylinder 8c of the rotor blade 8) is set in the range from 60 mm to the highest static water level in the washing and dehydration tank 5, for example, 300 mm. do. Cylindrical body 8
When a finishing agent feeding device is constructed at the upper end of the container c, it protrudes above the highest static water level in the washing and dehydrating tub 5.

As shown in FIG. 9, the number of small blade parts 8b of the rotary blade 8 may be set to an appropriate number because the cleaning power does not change significantly even if the number is changed. There are several. The outer diameter of the cylinder 8c is within a range that does not reduce the substantial volume of the washing tub 5, and
The minimum diameter that can be firmly installed is set at 40 to 50 mm.

The cylindrical body 8c of the rotary blade 8 is provided with small blades 8d.
A conceivable shape of the small blades 8d is to extend upward corresponding to the number of small wing parts 8b. A case as shown in A of FIG. 10 and a case as shown in B of FIG. 10 have already been proposed with different shapes for the purpose of improving the uneven washing of clothes in the washing tub. More specifically, in the case of FIG. 10A, the diameter φd ₂ of the cylinder 8c is larger than the diameter φd ₁ and is extended upward from the small wing portion 8b to form a small blade. In terms of washing performance in this case, the movement of the bottom and top of the clothes in the tank 5 is such that the bottom part receives a strong stirring force, that is, the shaking washing force, by the small blade part 8b, but the top part receives only a small mechanical force due to _φd2 . do not have. This means that the washing becomes more uneven. In addition, near the cylindrical part 8c at the beginning of the small wing part 8b, in the ○A part, there is only a small movement of the clothing due to φd ₂ compared to the large movement of the clothing in the circumferential direction by the small wing part 8b, so due to this difference in momentum, ○ Clothes tend to get wrapped around the area.

During washing, the action of wrapping, unraveling, and wrapping the clothes occurs around the ○I area. This means that even if the agitator method does not cause much damage to clothing as a whole, the damage to the clothing will be large in some areas.

In other words, there is clothing that happens to be weak near the ○I area (those that have been used a lot or are inherently weak, such as women's underwear).
However, if it exists, problems such as breakage will occur. In addition, although the difference in mechanical force in the vertical direction mentioned earlier promotes the switching of clothes from top to bottom, the switching of clothes essentially takes about 10 minutes compared to the movement of stirring the clothes in the circumferential direction. 1~ during washing time
It has been experimentally confirmed that this occurs only a few times, about 5 times. In other words, this movement can be easily understood by placing all white clothing and adding one or two pieces of red clothing and checking it in a transparent tank. Therefore, φd ₂ near part ○A
The larger the circumference, the longer the circumferential distance and the faster the speed, which increases the force with which the clothing is wrapped, and the more damage it causes to the clothing. Also, B in Fig. 10 has φd ₃ larger than φd ₂ in order to reduce uneven washing on the upper and lower sides.
Since it is provided in the upper part, there is less uneven washing than in A, but essentially the relative speed in the vertical direction given to dry clothes, which is an extension of the small wing part 8b, can only be reduced by reducing it.

Therefore, the cleaning efficiency is rather reduced, and the area of each blade increases, so that the motor 16 requires even more power. Therefore, in the present invention, as shown in FIG. 11, a portion in which no blades are present is provided in the cylindrical portion 8c above _l1 from the starting portion of the small wing portion 8b.

This minimizes the wrapping of the cloth around the cylindrical portion 8c, and since there are no protrusions such as wings, damage to the extreme portions of the cloth can be suppressed. In addition, the relative speed between the bottom and top cloths is sufficient, making it possible to replace the cloths in the vertical direction. However, in order to improve the uneven washing, it was decided to adopt small blades because if there were small blades in the cylindrical portion 8c, stirring power could be expected there as well. Small blades 8d' and 8d'' are installed between _l2 , which is located below the water surface, but we have considered adjusting the number of blades by installing 8d' in all the areas between _l2 . , in this case simply
It was confirmed that the mechanical force applied to the cloth does not increase as the cylinder of φd ₄ rotates. Therefore,
There is no improvement in uneven washing. So the lap fee l ₃
We considered a method of providing small blades 8d' and 8d'' between _l2 so that the blades have a large number of blades.In this case, if each blade has a large number, it will act as a mere cylinder, so 8d'1 to 2 each in the circumferential direction. It was decided to provide one or two 8d'' sheets facing each other. As a result, there is no blade above 8d'', and 8d' exists shifted by 90° to 180°, so the mechanical force applied to the cloth acts effectively.Therefore, there is no need to increase the diameter of _φd4 , and all of the blades Since the area of the motor 16 is also small, less power is required for the motor 16.

This small blade 8d can provide a cleaning mechanism with good cleaning efficiency and less uneven cleaning.

When the rotary blade 8 is rotated forward and backward in a short cycle of 3 seconds or less, as can be seen from Figure 5, if the rotation speed of the rotor blade 8 is set to 300 rpm or less, the fabric damage rate can be reduced compared to the conventional pulsator method. Can be set small. Also,
Even if the outer diameter of the rotary blade 8 is changed from 200 to 350 mm, as can be seen from FIG. 6, the fabric damage rate does not become larger than in the conventional pulsator method. This holds true even if the rotational speed of the rotary blade 8 is changed from 100 to 300 rpm. Furthermore, even if the height of the rotary blade 8 is as high as 300 mm, the fabric damage rate can be set smaller than in the conventional pulsator method, as can be seen from FIG.

Furthermore, if the normal rotation operation time and the reverse rotation operation time of the rotary blade 8 are 3 seconds or less, as can be seen from FIG. 8, the fabric damage rate can be set smaller than in the conventional pulsator system. This relationship is based on the rotor blade 8
There is no difference even if the outer diameter is increased to 320 mm.

Next, the rotor blade 8 is rotated forward and reverse in 3 seconds or less, and the number of revolutions of the rotor blade 8 during forward and reverse rotation is set to 100 to 100.
Experiments have shown that cloth entanglement when set at 300 rpm can be suppressed to such an extent that it can be easily loosened when the laundry is lifted from the washing and dehydrating tub 5. This relationship remained the same even when the outer diameter and height of the rotor blade 8 were varied within the range of the above embodiment. Therefore, after the washing process or the rinsing process is finished, the laundry does not get tangled in a dumpling shape in the washing/dehydration tank 5, so that the dehydration process can be smoothly carried out, and the washing/dehydration tank 5 can be smoothly transferred to the dehydration process due to excessive imbalance. There are no problems such as stopping the rotation of the cloth and having to untangle the cloth each time to start the dewatering process. Furthermore, since there is little fabric entanglement in the washing and rinsing steps, uneven washing and uneven rinsing are eliminated. In addition, when the washing time is set to 10 minutes, the cleaning power can be reduced to 80 to 150% of the conventional pulsator method, which is superior to the conventional agitator method.

Furthermore, even if the rotary blade 8 with the cylindrical body 8c is rotated in a short cycle as in this embodiment, the motor input is approximately
The power consumption can be kept below 400W, and the motor used in conventional pulsator systems can be used without increasing the motor capacity.
Therefore, since it is only necessary to change the rotational speed and reversal period of the rotor blade 8 and the shape of the rotor blade, the parts used in the conventional pulsator system can be shared, which is extremely economical.

Further, a cylindrical body 8 is placed above the center of the upper surface of the rotary blade 8.
c can be extended to the highest static water level in the washing and dewatering tank 5, so a lint filter device or finishing agent dosing device can be installed in the cylinder body 8, and new functions can be achieved. This can be easily done by simply machining the rotor blade 8 without machining the washing/drying tub 5 and the outer tub 4.

In this embodiment, the cylindrical body 8c of the rotary blade 8 is
Although the cylindrical body 8c is integrally formed with the wing body 8a, it may be configured to be detachably attached to the wing body 8a.
With this configuration, molding of the rotor blade 8 is easy and productivity is excellent.

In this embodiment, since a mechanical timer 23 is used, there is a limit to reducing the reversal cycle of the washing machine motor.
By using S ₁ and S ₂ alternately, it was possible to set the normal rotation for 0.5 seconds, rest for 0.5 seconds, and reverse for 0.5 seconds.

Further reductions below this value can be achieved by using an electronic timer. Further, in this embodiment, the outer frame 1 and the outer tank 4 are provided separately, but the outer frame 1 may also serve as the outer tank 4.

As described above, according to the present invention, it is possible to provide a fully automatic washing machine that is less likely to tangle or damage cloth, and which can improve cleaning power over conventional agitator systems.

[Brief explanation of drawings]

1 to 9 show an embodiment of the present invention,
Figure 1 is a longitudinal sectional view of the main parts, Figure 2 is a time chart of the cam switch, Figure 3 is an electrical circuit diagram, Figure 4 is a time chart of the reversing switch, and Figure 5 is a characteristic curve diagram of rotation speed and damage rate. , Figure 6 is a characteristic curve diagram of rotor blade diameter and damage rate, Figure 7 is a characteristic curve diagram of rotor blade height and damage rate, Figure 8 is a characteristic curve diagram of operating time and damage rate, and Figure 9 is a characteristic curve diagram of rotor blade height and damage rate. Characteristic curve diagram of number of sheets and cleaning ratio,
10A and 10B are diagrams of a conventional rotor, and FIG. 11 is a diagram of a rotor according to the present invention. 4... Outer tank, 5... Washing and dehydration tank, 8... Rotating blade, 8c... Cylindrical body, 8d', 8d''... Small blade, 16
...Washing machine motor.

Claims (1)

[Scope of Claims] 1. An outer tank, a washing and dehydration tank rotatably provided in the outer tank, a rotary blade rotatably provided at the inner bottom of the washing and dehydration tank, and a rotor that rotates during washing. Alternatively, a fully automatic washing machine including a washing machine motor that rotates forward and reverse during rinsing and rotates the washing and dehydration tub at high speed in one direction during spin-drying, and has a cylindrical body formed at the center of the upper part of the rotary blade. The forward rotation time and reverse rotation time of the washing machine motor during rinsing are set to 3 seconds or less, and the rotation speed of the washing machine rotor during washing or rinsing is set in the range of 100 to 300 rpm, and A fully automatic washing machine characterized by having a section _l1 without small blades and a section _l2 having small blades in the cylindrical part. 2. A section l ₁ without small blades and a section l ₂ with small blades are provided in the cylindrical part, a lap margin l ₃ is provided between each small blade, and each small blade is provided at a predetermined angle offset, and the number of blades is The fully automatic washing machine according to claim 1, characterized in that the washing machine is set to 1 to 2 sheets.