JPH07255992A - Dehydration washing machine - Google Patents

Abstract

(57) [Summary] [Purpose] Efficiently collects cloth waste generated in the washing tub. [Structure] In a lower area of a body portion 9b of a washing tub 9, a dehydration / cloth waste discharge hole 55 is denser or larger than a dehydration hole 54 in an upper area.
And the cloth waste generated in the washing tub 9 is efficiently discharged to the outside of the washing tub and reaches the bottom of the outer tub 3. Since the washing water at the bottom of the outer tub is circulated through the cloth dust collecting filter 14 by the pump action by the rotation of the back blade 10a, the cloth dust is collected,
The generated cloth waste can be collected efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewatering washing machine, and more particularly to improving the collection performance of a cloth dust collecting means for collecting cloth dust and thread dust (hereinafter referred to as cloth dust) floating in washing water. .

[0002]

2. Description of the Related Art A fully automatic washing machine equipped with a cloth dust collecting means is a pump having a back blade integrally formed on the back side of a rotary blade as disclosed in, for example, Japanese Utility Model Laid-Open No. 59-171684. By the action, the washing water at the bottom of the outer tub is sucked and sent to the cloth dust collecting net so that the cloth dust contained in the washing water is collected by the net.

The rotary blade is installed so as to close a recess formed in the central portion of the bottom wall of the washing tub and defines the recess as a pump chamber, and the washing water at the bottom of the outer tub is introduced from the suction hole formed in the bottom wall of the recess. Is sucked, and is sent from a discharge hole formed in the side wall of the recess to a cloth collecting net installed at the tip of the water guiding passage (upper body of the washing tub) through the water guiding passage formed in the washing tub body.

[0004]

In order to efficiently collect the cloth debris in the washing water by such cloth debris collection means, the thread debris generated in the washing tub efficiently moves to the bottom of the outer tub. In particular, it is desirable that the washing water pressurized in the pump chamber be efficiently sent to the cloth dust collecting net and circulate through the cloth dust collecting net without leakage.

However, in the conventional fully automatic washing machine,
There is a lack of ideas for efficiently guiding the cloth waste generated in the washing tub to the bottom of the outer tub, and a device for pressurizing the washing water at the bottom of the outer tub to circulate it efficiently in the cloth collecting net. Is lacking in.

Therefore, an object of the present invention is to provide a cloth dust collecting means for efficiently collecting the cloth dust generated in the washing tub.

Specifically, it is intended to efficiently guide the cloth waste generated in the washing tub to the bottom of the outer tub, and further efficiently circulate the cloth waste together with the washing water in the cloth waste collecting means for collection. .

[0008]

According to the present invention, there is provided an outer tub, a washing tub arranged in the outer tub and having a dehydration hole which also serves as a dehydration tub, and a rotary blade provided at the center of the bottom of the washing tub. A drive device for rotating the rotary vane and / or the washing tub, and a cloth dust collecting means for circulating the washing water at the bottom of the outer tub to the cloth dust collecting portion to collect the cloth dust contained in the washing water. In the washing machine having the above, the dehydration and cloth discharge holes are formed in the lower region of the body part of the washing tub more closely than the dehydration holes in the upper region, or the lower part of the body part of the washing tub is It is characterized in that a drainage and cloth waste discharge hole larger than the dehydration hole in the upper region is formed in the region.

[0009] In addition, in order to generate a circulating water flow for collecting cloth debris, the pump chamber formed between the bottom wall of the washing tub and the rotary blades has increased water leakage resistance and is sucked from the outer tub. It is characterized in that the washing water containing the cloth waste can be efficiently sent to the cloth waste collecting portion.

[0010]

Most of the cloth dust is generated by the mechanical action of the rotary blades on the laundry, and rides on the water flow formed by the rotary blades, so that the body part of the washing tub located around the rotary blades is Although moving along the lower area, the drainage and cloth waste discharge holes in the lower area of the body portion of the washing tub are formed larger or denser than those in the upper area, so that the cloth trash is washed. Efficiently discharge to the outside to reach the bottom of the outer tank. The cloth debris collecting means collects the cloth debris contained in the washing water by circulating the washing water at the bottom of the outer tub to the cloth debris collection unit by a pump, so that the generated cloth debris is efficiently collected. be able to.

[0011]

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

1 and 2 show a first embodiment of a fully automatic washing machine according to the present invention. FIG. 1 is a vertical sectional side view, and FIG.
FIG. 4 is a cross-sectional plan view of essential parts showing a wash water circulation channel.

In FIG. 1, the exterior is composed of an outer frame 1 and a lid 2 which is openably and closably attached to an upper edge portion thereof. The outer tub 3, which is a water receiving tub, is provided with a tub cover 3a at its upper edge portion, and is supported in a suspended state in the outer rim 1 from the upper four corners of the outer rim 1 by suspension rods 4b via buffer members 4a. The washing water in the washing step and the rinsing water in the rinsing step (hereinafter referred to as washing water) are stored.

A drive motor 6 attached to a drive unit base 5 installed on the outer side of the bottom wall of the outer tub 3 is connected by a belt 8 and a transmission device 7 which is a combination of a gear reduction mechanism and a clutch mechanism. Concentric double output shafts 7a, 7
b penetrates the bottom wall of the outer tub 3 in a watertight state and projects into the outer tub 3. The transmission device 7 rotates the inner output shaft 7a forward and backward at a low speed of 100 to 150 rpm while keeping the outer output shaft 7b stationary in the washing process and the rinsing process,
In the dehydration step, the inner and outer output shafts 7a and 7b are rotated together at a high speed of 700 to 1000 rpm.

The washing tub 9 is mainly composed of a bottom wall portion 9a and a body portion 9b, and a bottom wall concave portion 9c which is closed by a rotary blade 10 to form a pump chamber is formed in a central portion of the bottom wall portion 9a. The balancer 9d is mounted on the upper edge of the body 9b. A hub 11 coupled to the outer output shaft 7b is joined to the outer surface of the bottom wall recess 9c of the washing tub 9, and a casing 12 having a cylindrical portion 12a and a discharge port 12b on the inner surface.
Are joined together, and these three members are integrally joined by screws, rivets or the like. The washing tub 9 includes a cloth waste discharge hole 51 formed in the bottom wall 9a, a bottom wall recess 9c, and a hub 11.
And a suction port 5 formed so as to penetrate the casing 12.
2, 56, 57, a drainage hole 53 formed in the bottom wall recess 9c, a dehydration hole 54 formed uniformly over the entire peripheral surface in the upper region of the body 9b, and the dehydration hole in the lower region. 54
It is provided with the dehydration and cloth waste discharge holes 55 formed more densely.

The rotary blade 10 coupled to the shaft end of the inner output shaft 7a is positioned so as to block the bottom wall recess 9c and define the pump chamber forming space. A back blade 10a formed on the back side of the rotary blade 10 projects into the casing 12 to form a pump, and an annular rib 10b projecting to the back side is an upper edge portion of the cylindrical portion 12a of the casing 12. A labyrinth structure seal portion is formed on the outer periphery so as to face each other with a minute gap therebetween, and functions to suppress water leakage in the pump chamber.

The partition wall plate 13 is installed from the outlet 12b of the casing 12 along the inner wall surface of the washing tub 9 to the upper edge of the body portion 9b so as to be closely attached to the inner wall surface of the washing tub 9 and guided to the washing tub 9. The water channel 13a is formed, and a bag-like cloth dust collecting filter 1 made of a fine mesh is formed at the outlet 13b formed at the upper end of the water channel 13a.
4 is installed detachably.

The drainage port 3b formed on the bottom wall of the outer tank 3
Is connected to a drain hose 16 via a drain solenoid valve 15 to form a drain system, and an intermittent operation of a clutch mechanism in the transmission device 7 for switching a power transmission mode to the inner and outer output shafts 7a and 7b is performed. This is performed by the solenoid coil 17. Since the water supply system is the same as that of the conventional fully automatic washing machine, its illustration is omitted and the operation control of the drive motor 16, the control of the water supply / drainage system, and the control of the solenoid coil 17 for operating the transmission device 7 are performed. Since the same applies to the apparatus, the illustration and description thereof will be omitted.

In the above construction, in the washing step or the rinsing step, the washing water having a predetermined water level is held in the outer tub 3, and the rotary wing 10 is kept at 100 to 1 while the washing tub 9 is kept stationary.
It is driven by the drive motor 6 so as to repeat forward rotation and reverse rotation at a low speed of 50 rpm in a short cycle. At this time, the rotation direction of the rotary blade 10 is determined by the rotation direction of the drive motor 6, and the transmission device 7 decelerates the rotation of the drive motor 6 and transmits it only to the inner output shaft 7a to rotate the rotary blade 10 at a low speed. Works like.

In the washing or rinsing step, the laundry is stirred or rubbed by the rotation of the rotary blades 10 to be washed or rinsed. Then, the cloth waste generated in the washing process or the rinsing process is mixed with the wash water and moves together with the wash water.

In the washing tub 9, the washing water is mixed with the rotating blade 1
Rotation of 0 urges the lower part of the washing tub 9 in which the rotary blades 10 are located to move radially outward, collides with the lower part of the body part 9b, and follows the inner surface of the body part 9b. Turn to rise.

Further, when the rotary blade 10 rotates, the washing water on the back side of the rotary blade 10 is pressurized by the pumping action of the back blade 10a and discharged from the discharge port 12b to the water guide path 13a. It rises and flows out from the outlet 13b to the cloth dust collecting filter 14, where the cloth dust is collected and returns to the inside of the washing tub 9. In a general washing machine, a relatively large gap is formed between the outer peripheral edge of the rotary wing 10 and the peripheral wall of the bottom wall recess 9c of the washing tub 9 in order to avoid contact between the two due to manufacturing error or aging. The washing water pressurized by the back blade 10a is likely to leak into the washing tub 9 through the gap. This leakage acts to scatter the cloth debris contained in the washing water into the washing tub 9 again and reduces the cloth debris collection effect. However, in this embodiment, the rotor 1
Cylindrical portion 1 of casing 12 and annular rib 10b on the back side of 0
2a face each other in a minute gap to form a pump chamber with little water leakage, so that pressurized wash water can be efficiently introduced into the water conduit 13a.
Can be sent to. Then, the washing water at the bottom of the outer tub 3 is sucked into the back side of the rotary blade 10 from the suction port 52 together with the cloth dust, and the cloth dust discharge hole 51, the water drain hole 53,
Through the dehydration hole 54 and the dehydration and cloth waste discharge hole 55, the washing tub 9
The washing water containing the cloth waste inside flows in.

In the circulation of the washing water for collecting the cloth dust, since the water flow around the rotary blade 10 is strong toward the outside, it is convenient to discharge the cloth dust through the hole of the washing tub 9 to the outside of the tub. It is a good position. In this embodiment, the force of the washing water flow generated in the washing tub 9 by the rotation of the rotary blades 10 is effectively utilized to effectively push out the cloth waste floating in the washing water to the outside of the washing tub 9. In order to be able to move to the bottom of the tub 3, a cloth waste discharge hole 51 is provided in the bottom wall portion 9a of the washing tub 9, and a drainage and cloth waste discharge hole 55 is provided in the lower region of the body portion 9b.

The holes 51, 54, 55 can be made to have a large cloth diameter by increasing the diameter (diameter) of the holes. However, the centrifugal force at the time of dehydration suppresses the entry of the laundry, which is generally used. 4 as well as the dehydration hole in a fully automatic washing machine
It is desirable that the diameter is about 6 mm. In this embodiment, the lower region of the body 9b is defined as the range from the bottom of the washing tub 9 to 1/4 of its depth, and the range beyond that is defined as the upper region. As an example, the upper region has a diameter of 4 mm. By providing the dehydration holes 54 of about 600 pieces / m ² and the dehydration and cloth waste discharge holes 55 of about 900 pieces / m ^{2 in} the lower region, the cloth waste discharging effect is enhanced and the cloth waste is increased. The collection effect could be remarkably enhanced.

The same effect is obtained by distributing the dewatering holes 54 in the upper area of the body 9b and the dewatering / cloth waste discharging holes 55 in the lower area with equal density, and increasing the diameter of the dehydrating / cloth waste discharging holes 55 in the lower area. It can also be obtained by doing. Even when the diameter of the dehydration hole 54 was set to 4 mm and the diameter of the dehydration and cloth waste discharge hole 55 was set to 4.5 mm to 6.0 mm, the cloth waste collecting effect was remarkably improved.

FIG. 3 is an experimental example showing the correlation between the form of the holes formed in the washing tub and the discharge amount of cloth waste. The characteristic curve is
When the colored cotton thread (cloth waste) cut to a length of 1 cm and the laundry are put into the washing tub and the rinsing process is performed, the discharge amount of the cotton thread from the washing tub into the outer tub per unit time is determined. It is shown in relation to the form of the dehydration and cloth waste discharge hole. Characteristic curve a
Shows the increase rate of the amount of discharged cloth waste when the dehydration and cloth waste discharge hole 55 is added to the lower region of the washing tub 9 in which 320 dehydration holes 54 are formed, and the characteristic curve b is 400 pieces. The increase rate of the amount of discharged cloth waste when the dehydration and cloth waste discharge hole 55 is added to the lower region of the washing tub 9 in which the dehydration hole 54 is formed is shown. Then, this cloth waste was able to be collected by the cloth waste collecting filter 14 with the collection amount ratio increasing characteristic showing the same tendency.

In the dehydration step after the washing step and the rinsing step,
By opening the drainage solenoid valve 15 and draining the wash water in the outer tub 3, the wash water in the wash tub 9 also has holes 51, 52, 53 ,.
It is drained out of the tank through 54 and 55. Then, by switching the transmission device 7 by the solenoid coil 17 and transmitting the rotation of the drive motor 6 to the inner and outer output shafts 7a and 7b at high speed, the washing tub 9 and the rotary wing 10 are integrally rotated at high speed. As a result, the washing water contained in the laundry is centrifugally dehydrated.

Next, another embodiment will be described with reference to FIG. FIG. 4 is a vertical cross-sectional side view of a main portion of the other embodiment, in which the same components as those in the above embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

The feature of this embodiment is that the outer peripheral flat surface portion 20b and the cylindrical portion 22a of the casing 22 are formed on the outer peripheral edge portion on the back side of the rotary blade 20 to have a sealing effect for suppressing water leakage in the pump chamber.
The flange portion 22c formed on the upper edge portion is made to face the wide width in the radial direction through the minute gap to increase the water leakage resistance from the minute gap. Although the washing water in the casing 22 is pressurized by the rotation of the back blade 20a, the rotary blade 20
Since the water leakage resistance of the minute gap formed between the outer peripheral flat surface portion 20b and the collar portion 22c of the casing 22 is large, the pressurized washing water is efficiently discharged from the discharge port 22b to the water conduit 13a.

Next, still another embodiment will be described with reference to FIG. FIG. 5 is a vertical cross-sectional side view of an essential part of the other embodiment, in which the same components as those in the above-mentioned embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

The feature of this embodiment is that a flexible lip 30b having a sealing effect for suppressing water leakage of the pump chamber is annularly extended from the outer peripheral edge of the rotary blade 30, and a bottom wall recess 9 of the outer tank 3 is provided.
This is because the sealing effect is enhanced by lightly contacting the upper part of c and the step 9d formed on the upper surface of the partition plate 13 or by making them face each other with a minute gap. In this embodiment, the casing is omitted and a pump chamber is formed by the bottom wall recess 9c and the rotary blades 10, and the wash water pressurized by the back blades 30a formed on the back side of the rotary blades 30 is separated by the partition plate 13. Is directly fed to the water guide port 13c formed at the lower end of the.

Next, still another embodiment will be described with reference to FIG. FIG. 6 is a vertical cross-sectional side view of an essential part of the other embodiment, in which the same components as those in the above embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

The feature of this embodiment is that the pump for circulating the wash water for collecting the cloth dust is independent of the rotary blades 40. The casing 43 has a partition wall 43a, a cylindrical portion 43b, and a discharge port 43c, and is inserted into the bottom wall recess 9c of the washing tub 6 so as to face down to form a pump chamber in the bottom wall recess 9c. To do. The impeller 42 is fixed to the inner output shaft 7a together with the rotary blades 10, and the wash water pressurized by the blades 42a by the rotation of the impeller 42 is efficiently delivered from the discharge port 43c to the water conduit 13a.

In the embodiment described above, the washing tub 9
The holes provided in the upper area of the washing tank 9 are described as being different from the dehydration holes 54 and the holes 55 provided in the lower area as the dehydration and cloth discharge holes. By increasing the diameter of the hole or increasing the diameter of the hole, the total area of the hole is increased to facilitate the discharge of cloth waste.

[0035]

Most of the cloth dust is generated when the rotary blades mechanically act on the laundry and rides on the water flow formed by the rotary blades and is located around the rotary blades. According to the present invention, the dehydration / cloth waste discharge hole in the lower area of the body of the washing tub is formed larger or denser than the dehydration hole in the upper area. Since the cloth waste is efficiently discharged to the outside of the washing tub and reaches the bottom of the outer tub, and is circulated and collected by the pump in the cloth waste collecting means, the generated cloth The effect that the waste can be efficiently collected can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a fully automatic washing machine according to the present invention.

FIG. 2 is a cross-sectional plan view of essential parts showing a wash water circulation channel in the fully automatic washing machine shown in FIG.

FIG. 3 is a characteristic diagram showing a correlation between a hole formed in a washing tub and a discharged amount of cloth waste.

FIG. 4 is a vertical cross-sectional side view of essential parts showing another embodiment of the fully automatic washing machine according to the present invention.

FIG. 5 is a vertical sectional side view of a main part showing still another embodiment of the fully automatic washing machine according to the present invention.

FIG. 6 is a vertical sectional side view of a main part showing still another embodiment of the fully automatic washing machine according to the present invention.

[Explanation of symbols]

3 ... Outer tub, 6 ... Drive motor, 7 ... Transmission device, 9 ... Washing tub, 9b ... Body part, 9c ... Bottom wall recessed part, 10 ... Rotor blade, 1
Reference numeral 0a ... Back blade, 13a ... Water conduit, 14 ... Cloth dust collecting filter, 52 ... Suction port, 54 ... Dewatering hole, 55 ... Dewatering and cloth discharging hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shiro Obayashi 502 Jinritsucho, Tsuchiura-shi, Ibaraki Machinery Research Institute, Hiritsu Manufacturing Co., Ltd. In the Mechanical Research Laboratory (72) Inventor Junichi Arimura 1-1-1, Higashitagacho, Hitachi City, Ibaraki Prefecture Living Company Division, Hitachi, Ltd. (72) Inventor Shunichi Ishikawa 1-1-1, Higashitagacho, Hitachi City, Ibaraki Prefecture Hitachi Ltd. Living Equipment Division

Claims (8)

[Claims] 1. An outer tub, a washing tub disposed in the outer tub and having a dehydration hole which also serves as a dewatering tub, a rotary wing provided at the center of the bottom of the washing tub, and the rotary wing and / or A washing machine comprising: a drive device for rotating a washing tub; and a cloth dust collecting means for circulating the washing water at the bottom of the outer tub to a cloth dust collecting portion to collect the cloth dust contained in the washing water. A dewatering and washing machine characterized in that a dewatering / cloth waste discharging hole is formed in a lower region of a body portion of the washing tub more densely than a dehydrating hole in an upper region. 2. An outer tub, a washing tub arranged in the outer tub and having a dehydration hole also serving as a dewatering tub, a rotary wing provided at the center of the bottom of the washing tub, and the rotary wing and / or the washing. A washing machine comprising: a drive device for rotating a tub; and a cloth dust collecting means for circulating the washing water at the bottom of the outer tub to a cloth dust collecting portion to collect the cloth dust contained in the washing water. A spin-drying washing machine, characterized in that a spin-drying / cloth waste discharging hole larger than the spin-drying hole in the upper area is formed in a lower area of a body part of a washing tub. 3. The dewatering washing machine according to claim 1 or 2, wherein the dewatering / cloth waste discharging hole is provided in a range from the bottom of the washing tub to a quarter of the depth thereof. 4. The dewatering washing machine according to claim 1, wherein the dewatering hole and / or the dewatering / cloth waste discharging hole is formed to have a diameter of 6 mm or less. 5. The pump according to claim 1 or 2, wherein the cloth dust collecting means is provided between the bottom wall of the washing tub and the rotary vanes and sucks and pressurizes the washing water at the bottom of the outer tub. And a cloth dust collecting filter detachably provided at an outlet of the water guiding path, the water guiding path being formed in the washing tank so as to guide the washing water pressurized by the above to the upper position of the washing tank. And dehydration washing machine. 6. The pump according to claim 5, wherein the pump is provided with a bottom wall recess formed in a bottom wall of the washing tub, a pump chamber defined by rotary blades, and a pump chamber provided behind the rotary blade and protruding into the pump chamber. A dewatering washing machine, comprising: a back blade, and a labyrinth seal portion formed between the bottom wall of the washing tub and the outer peripheral edge of the rotary wing. 7. The pump according to claim 5, wherein the pump is provided with a bottom wall recess formed in the bottom wall of the washing tub and a pump chamber defined by rotary blades, and the pump chamber is provided behind the rotary blade and projects into the pump chamber. A dehydration washing machine comprising: a back blade, and a seal portion having a flat portion facing each other with a minute gap between the bottom wall of the washing tub and the outer peripheral edge portion of the rotary wing. 8. The pump according to claim 5, wherein the pump is formed separately from a bottom wall recess formed in the bottom wall of the washing tub, a pump chamber partitioned by casing, and the rotary vane. A dewatering washing machine provided with an impeller located in the chamber and rotating integrally with the rotary blade.