JPS6127583Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a centrifugal dehydrating washing machine in which a rotary blade is provided at the inner bottom of a washing/dehydrating tub.

[Background of the idea]

Conventionally, centrifugal dehydrating washing machines have installed a lint filter in the washing and dehydrating tank, but the water level in the washing and dehydrating tank can be adjusted to high, medium, or low depending on the amount of items to be washed. If installed in this position, the amount of water passing through will be reduced for medium and low water levels, and if installed in accordance with low water levels, when used at high water levels, the cloth will rub and cause damage. It had the following disadvantages.

[Purpose of invention]

SUMMARY OF THE INVENTION In view of the above drawbacks, it is an object of the present invention to provide a lint filter that is effective regardless of the water level in the washing and dehydrating tank.

[Summary of the idea]

The gist of the present invention is to arrange a rotary blade in a wing seat at the bottom of a washing and dehydrating tank, and to set the ratio of the inner diameter of the washing and dehydrating tank to the outer diameter of the rotary blade to be 1.2 to 2.6.
The motion time of the rotary blade is 100 rpm to 350 rpm,
and in which the forward and reverse rotations of the rotary blade are each set to a maximum of 3 seconds, and the rotary blade and the blade seat form a pump chamber that sucks water from a water hole provided in the wall of the rotary blade. In addition, the water sucked into the pump chamber is configured to be discharged from above the washing and dehydrating tank through a lint filter into the washing and dehydrating tank.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 3, an outer tank 2 is supported in an outer frame 1 in a vibration-proof manner by a vibration-proof spring 3 and a hanging rod 4. As shown in FIGS. A washing and dehydrating tank 5 is provided inside the outer tank 2.
A wing seat 6 is formed at the center of the inner bottom of the washing and dewatering tank 5. A rotor blade 8 having a rotor shaft 7 is disposed within the blade seat 6 . A plurality of back blades 9 are integrally provided on the back surface of the rotary blade 8 to form a pump chamber 10.

As shown in FIG. 2, the washing/dehydration tank shaft 11 is
It is fixed via the flange 12 to the center of the outer bottom of the washing/drying tub 5 with a screw. A plurality of water holes 13 are provided in the central wall portion 8a of the rotary blade 8. The flange 12 is provided with a plurality of drainage holes 13a. The total opening area of the drainage holes 13a is set to 1/10 or less of the total opening area of the water passage holes 13.

On the back side of the outer tank 2, as shown in FIG. Attach. The motor 15 is fixed to the back surface of the outer tank 2 by a motor mounting plate 16.

The side wall of the washing and dehydrating tank 5 is provided with a large number of dehydrating holes 17. As shown in FIG. 3, the inner wall of the washing/drying tub 5 has an approximately wavy uneven surface by alternately forming troughs 18 and peaks 19.

From the inner bottom of the washing and dewatering tank 5 to the valley 18 on the inner wall
Water passage 2 communicating with the pump chamber 10 towards the upper end of the
0 is formed by attaching a water channel cover 21 made of synthetic resin to the inner wall of the washing and dehydrating tank 5. Water from the pump chamber 10 enters through the inlet 22 of the water passage 20 and flows out from the outlet 23 of the water passage 20 due to the pumping action of the rotor 8 . At the upper end of the washing and dehydration tank 5, a dilan ring 25 containing a fluid 24 for compensating for imbalance during dehydration is attached. A discharge channel 26 is formed in a part of the balance ring 25, with one end communicating with the outlet 22 of the passage channel 20 and the other end opening toward the inner bottom of the washing and dehydrating tub 5. Outlet portion 26a of discharge waterway 26
A bag-shaped lint filter 27 is attached to the lint filter 27.
The outlet portion 26a of the discharge waterway 26 is located above the washing water level.

The ratio between the inner diameter of the washing and dewatering tank 5 and the outer diameter of the rotary blade 8 is set in a range of 1.2 to 2.6. Therefore, the inner bottom area (projected area) of the washing/dehydration tank 5 and the rotor blade 8
The ratio to the upper area (projected area of rotor blade 8) is 1.44
~6.76.

The operating speed of the rotary blade 8 is set in the range of 100 rpm to 350 rpm. The motor 15 that rotates the rotary blade 88 in forward and reverse rotation has a maximum energization time of 3 seconds during forward rotation and energization time during reverse rotation, and a pause time between the energization time during forward rotation and the energization time during reverse rotation. (non-energized time) is controlled so that it is the minimum time required for the motor 15 to reverse, for example, 0.5 seconds. Therefore, in this embodiment, the maximum energization time during forward rotation is 3 seconds, the pause time during forward rotation is 0.5 seconds, the maximum energization time is 3 seconds during reverse rotation, and the pause time during reverse rotation is 0.5 seconds, totaling 7 seconds. Therefore, the number of forward and reverse reciprocations per minute of the rotor blade 8 (hereinafter referred to as the operation cycle) is N.
is greater than or equal to 8.57. The operating cycle N is made smaller than that of the conventional stirring type. That is, the operating cycle N is smaller than the minimum operating cycle 50 of the conventional stirring type.

FIG. 4 shows the characteristics of the amount of unbalance generated when the rotation of the washing/dehydration tank 5 is started and the operating time of the rotary blade 8. FIG. 5 shows the characteristics of the amount of unbalance generated during steady rotation of the washing/drying tub 5 and the operating time of the rotary blade 8. Here, the amount of unbalance generated is the amount of whirling vibration of the upper part of the outer tank 2 replaced by an equivalent amount of unbalance.

In the conventional spiral type (for example, the operating speed of the rotor blade 8 is 400 rpm, the rotation period of the rotor blade 8 is 27 seconds positive number - 3 seconds rest - reverse rotation 27 seconds), the amount of unbalance that occurs is:
0.9Kg during steady rotation and 1.3Kg when starting rotation
Kg and quite large. The reason for this is that when the operating time of the rotary blades 8 exceeds 5 seconds, the laundry rotates in the washing and dehydration tank 5 while having a large relative speed with the rotary blades 8. The laundry near the bottom tries to rotate almost in the same direction as the rotary blades, and the rotation of the laundry decreases as it approaches the upper water surface of the washing and dehydrating tub 5, so the laundry in the washing and dehydrating tub 5 is rotated vertically. This is because the laundry will get twisted and the laundry will be more lopsided. Therefore, when we measured the amount of unbalance that occurred during a short operating time of the rotor blade 8, 5 seconds or less, we found that as shown in Figures 4 and 5, the amount of unbalance that occurs increases as the operating time becomes shorter. You can see that it decreases. especially,
If the operating time is kept to 3 seconds or less, that is, the maximum is 3 seconds, the amount of unbalance that occurs when the rotation of the washing and dehydrating tank 5 is started and the amount of unbalance that occurs when the washing and dehydrating tank normally rotates are reduced compared to the conventional spiral type. can be made smaller than. Therefore, the reversal period of the rotary blade 8 in the washing process and the rinsing process, that is, the reversal period of the motor 15, is set such that the driving time during normal rotation is at most 3 seconds, and the rest time is necessary so that the motor 15 can actually rotate in the reverse direction. For example, the time may be set to 0.5 seconds, and the driving time during reverse rotation may be set to a maximum of 3 seconds.

Based on this reversal period, the height of the rotor blade 8,
In determining the outer diameter and rotation speed as well as the volume (inner diameter and washing water level) of the washing and dehydrating tank 5, we used the washing mechanism of a centrifugal dehydrating washing machine that adopted a conventional spiral type, and set the reversal period to 2 seconds in the normal rotation. When we looked at the relationship between the operating speed of the rotor 8 and the cleaning ratio or damage ratio under the conditions of - 0.5 seconds of rest - 2 seconds of reverse rotation, we obtained the results shown in Figure 6. Note that the cleaning ratio and damage ratio are calculated assuming that the cleaning power and fabric damage in the conventional spiral type are 1.

As can be seen from FIG. 6, as the operating speed of the rotary blade 8 is lowered, the cleaning power also decreases, but the rate at which damage decreases is greater than the rate at which the cleaning power decreases. For example, when the operating speed is 400 rpm, the cleaning power is reduced to about 78% of the conventional spiral type, and the damage is reduced to 52% of the conventional spiral type. driving speed
At 200 rpm, the cleaning power is reduced to 48% of the conventional spiral type, and the damage is reduced to 22% of the conventional spiral type. Therefore, in order to reduce damage to laundry and improve cleaning power, the operating speed of the rotary blades 8 should be kept low, and the cleaning power of the rotary blades 8 should be prevented from decreasing as the operating speed decreases. It is necessary to compensate by changing the size and shape of the washing and dehydrating tank 5. In FIG. 6, the solid line shows the case of the conventional spiral type, and the dashed line shows the case of this embodiment.

Therefore, first, the relationship between the cleaning ratio, the damage ratio, and the outer diameter of the rotary blade 8 was confirmed by experiment, and the result was as shown in FIG. 7. The experimental conditions were as follows: the inner diameter of the washing and dewatering tank 5 was set to 390 mm, the operating speed of the rotor blade 8 was set to 200 rpm, and the reversal period of the rotor blade 8 was set to 2 seconds of normal rotation, 0.5 seconds of rest, and 2 seconds of reverse rotation.

As can be seen from Figure 7, in order to achieve 70% or more of the cleaning power of the conventional spiral type, that is, a cleaning ratio of 0.7 or more, the height of the rotor blade 8 must be equal to the height of the conventional spiral type rotor blade. In a certain case of 60 mm, the outer diameter of the rotor blade 8 is
If the washing water level is 215 mm or more and the height of the rotary blade 8 is 300 mm, which is the same as the maximum washing water level of the conventional spiral type, it is understood that the outer diameter of the rotary blade 8 should be 150 mm or more. In order to have almost the same cleaning power as the conventional spiral type, the outer diameter of the rotor blade 8 should be 310 mm when the height of the rotor blade 8 is 60 mm, and the outer diameter of the rotor blade 8 must be 310 mm when the height of the rotor blade 8 is 300 mm. The outer diameter of the blade 8 may be 210 mm. In addition, when the cleaning power is almost the same as that of the conventional spiral type, the damage is less than 80% of that of the conventional spiral type, that is, the damage ratio is 0.8
Less can be kept and can be greatly improved. If the cleaning power is 70% of that of the conventional swirl type, the damage ratio will be 0.6 or less, which is much closer to the damage ratio of the conventional stirring type. In addition, in FIG. 7, the solid line shows the cleaning ratio, and the one-dot chain line shows the damage ratio.

Next, when the relationship between the cleaning ratio, the damage ratio, and the operating speed of the rotor blade 8 is confirmed by experiment, the result is as shown in FIG. 8. The experimental conditions were the same as in Figure 7, and a rotor blade 8 with an outer diameter of 310 mm was used. As can be seen from Figure 8, in order to secure cleaning power that is 70% or more of the cleaning power of the conventional spiral type, the operating speed of the rotor 8 needs to be 100 rpm or more, and it is faster than the conventional spiral type. In order to reduce damage, the operating speed of the rotor blade 8 must be 350 rpm or less.

Next, when the relationship between the cleaning ratio, the damage ratio, and the height of the rotor blade 8 is confirmed through experiments, it is as shown in FIG. 9. The experimental conditions are the same as in FIG. Even if the height of the rotor blade 8 is changed, as can be seen from Fig. 9,
It can be seen that the cleaning and damage ratios vary only slightly anyway.

Next, ignoring the amount of unbalance that occurs, motor 1
5, i.e. the operating time during the reversal cycle of rotor 8.
When the relationship between the operating time during the reversal cycle, the cleaning ratio, and the damage ratio was experimentally confirmed, it was as shown in Fig. 10. The experimental conditions were that the rotor blade 8 had a height of 60 mm, an outer diameter of 310 mm, and a rotation speed of 200 rpm, and the inner diameter of the washing/dehydration tank was 390 mm. As can be seen from FIG. 10, even if the operating time of the rotor blade 8 is changed, the cleaning ratio and damage ratio hardly change.

Next, when we experimentally confirmed the relationship between the cloth entanglement rate and the operating time during the reversal period of the rotor blade 8, we found that
It will look like the figure. Regarding the cloth entanglement rate, here,
After completing a series of washing, rinsing, and spin-drying steps, grab any piece of laundry from the washing/spinner tub 5 and wash it two or three times. The tangle rate is defined as 0% when the test cloth (using the test fabric) falls apart, and the tangle rate is defined as 100% when all the laundry is tangled and cannot be undone.

Before considering the experimental results shown in Figure 11, if we look at the relationship between the cloth entanglement rate and the amount of unbalance that occurs, and the relationship between the cloth reduction rate and the cloth entanglement rate, we will see Figures 12 and 13. . Here, the fabric loss rate is how much of the original weight of a cloth that frays easily, such as a towel, is lost when the series of steps of washing, rinsing, and dehydration are performed 30 times. is expressed as a percentage.

As can be seen from FIG. 12, if the cloth entanglement rate is reduced, the amount of unbalance generated will be reduced. Moreover, as can be seen from FIG. 13, it can be seen that if the cloth entanglement rate is decreased, the cloth reduction rate is decreased. In addition, in FIG. 13, the solid line shows the case where each process of washing, rinsing, and dehydration was performed, and the dashed-dotted line shows the case where only the washing process was performed.

When we washed towels in a centrifugal dehydration washing machine with a cloth reduction rate of 6%, we found that after 30 washes, the threads of the towels began to come out, and after 100 washes, the edges of the towels frayed, making them unsuitable for use in barbershops, etc. becomes. Therefore, we conducted an experiment to create a washing machine suitable for barbershops and other places where towels are used every day, and to more than double the number of uses of conventional towels.We found that the drying reduction rate was 4.5
It was found that it is sufficient to keep it below %. In order to reduce the cloth reduction rate to 4.5% or less, it is necessary to reduce the cloth entanglement rate to 40% or less, as shown in FIG. 13.

As shown in FIG. 11, the cloth entanglement rate is greatly influenced by the operating time of the rotor blade 8. As the operating time becomes longer, the cloth entanglement rate increases. Cloth entanglement rate
It can be seen from Figure 11 that in order to more than double the number of times towels are used with a ratio of 40% or less, it is sufficient to keep the operating time to a maximum of 3 seconds. The cloth entanglement rate is reduced when the outer diameter of the rotor 8 is small and the height of the rotor 8 is large, and when the outer diameter of the rotor 8 is large and the height of the rotor 8 is small. The cloth entanglement rate tends to increase, but regardless of the outer diameter and height of the rotary blade 8, if the operating time is kept to a maximum of 3 seconds, the cloth entanglement rate can be reduced to 40.
% or less.

Next, if we consider the relationship between the input of the motor 15 and the outer diameter of the rotary blade 8, we will find the relationship as shown in FIG.
In other words, the electric power situation in domestic households and the motor 1
Considering the prevention of electrical noise by turning on and off the switch for automatically reversing the motor 5 in short cycles, it is necessary to suppress the input to the motor 15 to approximately 340 W or less.

In order to suppress the input of the motor 15 to approximately 340W or less, the height of the rotor blade 8 must be 300 mm (washing and dehydration tank 5
(almost the same as the water level during the washing process), the outer diameter of the rotor blade 8 should be 270 mm or less,
And when the height of the rotor blade 8 is 60 mm, the rotor blade 8
The outer diameter should be 320mm or less.

Summarizing the experimental results shown in FIGS. 4 to 14, from the viewpoint of the amount of unbalance generated and the cloth entanglement rate, it is preferable that the operating time of the rotary blade 8 be 3 seconds at the maximum. In particular, when the operating time is 1.5 seconds or less, in order to achieve a cloth entanglement rate of 40%, the height of the rotary blade 8 must be approximately 300 mm (the height of the washing water surface during washing), as in the conventional stirring type. is preferred. When the height of the rotor blade 8 is set to 300 mm, in order to make the cleaning ratio over 70% and to suppress the input of the motor 15 to approximately 340 W or less, when the height of the rotor blade 8 is set to 300 mm, the rotation The outer diameter of the blade 8 is in the range of 150 mm to 270 mm, and the height of the rotor blade 8 is
If it is 60mm, the outer diameter of rotor blade 8 should be 215mm to 320mm.
You can set each in the range of .

The inner diameter of the washing and dewatering tank 5 changes from 390 mm, which is the experimental condition shown in FIGS. 4 to 14, depending on the rated capacity for laundry. Even in this case, the same data as in FIGS. 4 to 14 can be obtained by keeping the ratio of the inner diameter of the washing and dewatering tub 5 to the outer diameter of the rotary blade 8 constant. Therefore, in order to be able to handle the rated capacity of various types of laundry,
When the height of rotor blade 8 is 300 mm (operating time is
1.5 seconds or less), the ratio of the inner diameter of the washing/dehydrating tank 5 to the outer diameter of the rotary blade 8 is 390/150.
~390/270 = 2.6 to 1.4, and when the height of the rotor blade 8 is 60 mm (preferably the operating time is 3 seconds to 1.5 seconds), the inner diameter and rotation of the washing and dehydrating tub 5 The ratio to the outer diameter of blade 8 is 390/215 ~
It may be set within the range of 390/210=1.8 to 1.2.

The height of the rotary blade 8 can be varied from about 40 mm to 60 mm in the conventional spiral type to a washing water level of 300 mm in the washing process in the washing/dehydration tank. Therefore, if the inner diameter of the washing/dehydration tank 5 and the outer diameter of the rotary blade 8 are determined by setting the input of the motor 15, the damage ratio, and the reversal period, the height of the rotary blade 8 can be increased to compensate for the cleaning power. This can be done by

In the centrifugal dewatering washing machine configured as described above, when the rotary blade 8 rotates during washing, the pump action of the back blade 9 causes the rotary blade 8 to rotate as shown by arrow Q in FIG.
The pump chamber 10 is
This sucked water is sent to the water passage 20 that opens to the outer periphery of the high-pressure pump chamber 10, and then flows from the discharge water passage 26 to the central part of the washing and dewatering tank 5 as shown by the arrow. It is forced to discharge towards the direction. Further, a bag-shaped lint filter 27 is detachably attached to the outlet portion 26a of the discharge waterway 26, and the water discharged from the outlet portion 26a is discharged into the washing/dehydration tank 5 through the lint filter 27. Lint waste can be easily removed.
In addition, the location of the water hole 13 is the flange 12.
However, in this case, the water between the washing and dehydrating tub 5 and the outer tub 2 will be sucked in. In this case, the lint is removed from the dehydration hole 17 of the washing and dehydration tank 5.
Since the lint comes out between the washing and dewatering tub 5 and the outer tub 2 and is sucked in from the lower part of the flange 12, for example, lint larger than the dewatering hole 17 cannot be collected. However, according to the present invention,
Since the lint in the washing and dewatering tank 5 can be collected directly through the water passage hole 13, the collection effect is increased.

As described above, since the washing machine has a reversal cycle, the adhesion of the laundry to the water passage hole is small, and the amount of water passing through the water passage hole can be secured.
Since the ratio of the inner diameter of the rotor blade 9 to the outer diameter of the rotor blade 8 is set to 1.2 to 2.6, the outer diameter of the rear blade 9 can be made large, which is advantageous in that it is possible to increase the pumping action.

As described above, according to the present invention, it is possible to provide an effective lint filter even in a centrifugal dehydration washing machine where cloth damage or tangles are small.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of the main part of a centrifugal dehydrating washing machine, Fig. 2 is a longitudinal sectional view of the washing and dehydrating tank section, and Fig. 3 is a state in which the rotor blade is removed. Figure 4 is a characteristic diagram of the amount of unbalance generated during steady rotation of dehydration and the operating time of the rotor blade, and Figure 5 is the amount of unbalance generated at the start of dehydration and the operation of the rotor blade. Figure 6 is a characteristic diagram of the washing ratio and damage ratio versus the operating speed of the rotor blade, Figure 7 is a characteristic diagram of the washing ratio and damage ratio and the outer diameter of the rotor blade, and Figure 8 is a characteristic diagram of the washing ratio and damage ratio versus the outer diameter of the rotor blade. A characteristic diagram of the washing ratio and damage ratio and the operating speed of the rotor blade, Fig. 9 is a characteristic diagram of the washing ratio and damage ratio and the height of the rotor blade, and Fig. 10 is a characteristic diagram of the washing ratio and damage ratio and the rotation period of the rotor blade. Figure 11 is a characteristic diagram between the cloth entanglement rate and the operation time during the rotation period of the rotor blade, Figure 12 is a characteristic diagram between the generated unbalance amount and cloth entanglement rate, and Figure 13 The figure is a characteristic diagram of cloth reduction rate and cloth entanglement rate.
FIG. 4 is a characteristic curve diagram of the motor input and the outer diameter of the rotor blade.

Claims (1)

[Scope of utility model registration request] It comprises a rotary blade and a washing and dehydrating tank having the rotary blade at the inner bottom, and the ratio of the inner diameter of the washing and dehydrating tank to the outer diameter of the rotary blade is set in the range of 1.2 to 2.6, and Rotary blade operating speed from 100rpm
In a centrifugal dehydrating washing machine in which the rotation speed is set in the range of 350 rpm, and the operating time of the rotary blade is set to a maximum of 3 seconds during normal rotation and reverse rotation, the rotary blade and the blade seat at the inner bottom of the washing and dehydration tank are A water passage hole provided in the wall of the rotor blade forms a pump chamber that sucks water, and the water sucked into the pump chamber is passed from above the washing and dehydrating tank through a lint filter into the washing and dehydrating tank. A centrifugal dehydrating washing machine characterized by being configured to discharge water to