JPH0956985A - Fully automatic washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the washing power by constituting one shower mechanism out of plural shower mechanism so as to be able to sprinkle washing water onto the whole area of inside a basket, in the case of a fully automatic washing machine equipped with plural shower mechanism to discharge washing water into the inner part of a washing dewatering basket. SOLUTION: The heights of circulation water passage covers 26, 28 provided at the four places of the inside wall surface of an inner basket 5 at the fully automatic washing machine extend to the upper part of the inner basket wall surface, and at the lower parts water leading opening parts that are opposite to the outer periphery of a bath blade 7a are provided. At the upper parts of the cover 26, 28, discharge opening parts 26b, 28b are provided. It is formed that washing water discharged from the discharge opening part 28b becomes shower to be spread over the whole area of the inner basket 5, that is, the washing water spreads at the center of the inner basket 5 with more than 70% of an inner basket diameter ratio in a case in which the washing water is sprinkled at the time of the water level of more than middle point of the height of the inner basket 5 in the state of water alone contained without the washing, and the wide angle of the side wall of the discharge opening part 28b is made to be more than 30 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine having a shower mechanism for pumping a washing liquid and sprinkling it on a laundry by a back blade of a rotary blade provided at the bottom of an inner tub. .

[0002]

2. Description of the Related Art As a fully automatic washing machine for improving the washing power of laundry, as shown in JP-A-7-8680, a plurality of independent circulating water channels are formed up to the upper part of a washing / dehydrating tub. Then, the upper part is opened toward the inside of the washing / dehydrating tub, and shower nozzles are provided at the openings, respectively, and the tips of the washing liquid discharged from the plurality of shower nozzles by the rotation of the rotary blades are A fully automatic washing machine that intersects at the center is proposed.

[0003]

However, it is effective to sprinkle the washing liquid over the entire washing / dehydrating tank as in the above-mentioned prior art in terms of early dissolution of washing and improvement of washing power. Providing a plurality of circulating water channels substantially reduces the tank volume, hinders the movement of clothes in the tank, and may cause uneven washing and insufficient cleaning power.
As a countermeasure for this, it is possible to project the part of the inner tub that forms the circulating water channel to the outside, but the gap with the outer tub made of synthetic resin that contains the washing and dehydrating tub becomes narrower,
Since the washing and dehydrating tubs are more likely to come into contact with the outer tub, there is a problem that the outer tub is upsized.

The object of the present invention is to solve the above-mentioned problems, to effectively diffuse the washing water discharged from the outlet of the circulating water channel throughout the tank, and to keep the circulating water channel to the necessary minimum number. An object of the present invention is to provide a fully automatic washing machine that improves the movement of clothes and improves the washing power.

[0005]

In order to achieve the above object, the present invention provides a washing and dehydrating tub, and an upper fluid balance ring in which a fluid is enclosed in a hollow ring arranged at the upper end of the tub.
A rotary vane rotatably disposed at the bottom of the washing / dehydrating tub, and a back vane integrally rotating on the back surface of the rotary vane.
A fully automatic washing machine comprising: a drive device for rotating the rotary blades in a reverse direction; and a plurality of shower mechanisms that use the rotation of the rotary blades as a drive source to discharge washing water in the interior part of the washing and dehydrating tub. One of the multiple shower mechanisms
The washing water can be sprinkled over the entire tub by a mechanism, and the shower mechanism at one location has a water level above the midpoint of the height of the washing / dehydrating tub in a state where there is no laundry in the water. At this time, when the washing water is sprinkled, the washing water is spread in the center of the washing / dehydrating tub by 70% or more of the diameter ratio of the washing / dehydrating tub.

[0006]

According to the present invention, since the washing water can be applied to the whole area of the tub with only one shower mechanism, the movement of the clothes is not hindered, the detergent can be dissolved early, the undissolved residue can be prevented, and the clothes can be lifted up. Permeation of washing water can be expected and cleaning power can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fully automatic washing machine according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a box-shaped outer frame 1 made of steel plate
An outer tank 4 made of a resin such as polypropylene is vibration-proofed and supported by a suspension rod 2 and a vibration-proof spring 3 therein. On the side wall of the outer tub 4, ribs 4a that engage the suspension rod 2 via the vibration-proof spring 3 are provided in a protruding manner. Inside the outer tub 4, a washing and dewatering tub (hereinafter abbreviated as inner tub) 5 having a substantially circular horizontal cross-section and made of stainless steel plate is provided, and an upper fluid balance ring 6 made of synthetic resin is provided at the upper end edge thereof. It is attached by screws.

A large number of dehydration holes 5a are provided on the side wall of the inner tank 5, and a large rotary blade 7 formed of a synthetic resin such as polypropylene is installed at the center of the bottom inner side. Is attached with a lower fluid balance ring 8 in which a fluid is enclosed in a hollow ring made of synthetic resin such as polypropylene whose outer peripheral surface is in contact with the inner peripheral surface of the inner tank 5.

At the upper end of the outer tub 4, a synthetic resin tub cover 9 is provided in order to prevent the laundry from falling into the gap between the outer tub 4 and the inner tub 5. The drainage device 10 includes a drainage solenoid valve 11 that is attached to the outside of the bottom of the outer tub 4 and communicates with the inside of the outer tub 4, and a drainage hose 12 that follows the drainage solenoid valve 11. The drain hose 12 extends outside the frame through a hole formed in the lower portion of the side wall of the outer frame 1.

On the outside of the bottom of the outer tub 4, a drive unit 1 is further provided.
A center base 14 made of a steel plate to which 3 is attached is fixed, and a washing motor 15 and a clutch mechanism 16 are fixed to the center base 14. Washing motor 1
A drive pulley 17 is fixed to the output shaft 15a of No. 5, a driven pulley 18 is fixed to the input shaft 16a of the clutch mechanism 16, and both pulleys 17 and 18 are connected by a belt 19. The clutch mechanism unit 16 includes a clutch and a speed reduction mechanism that switch between washing drive and dehydration drive, inside the clutch mechanism unit 16.
The double output shaft 16b is used for the center base 14 and the outer tank 4.
To the inside of the outer tub 4, the inner tub 5 is connected to the outer shaft, and the rotary blade 7 is connected to the inner shaft.

A top cover 20 is attached to the upper end of the outer frame 1, and a clothing inlet 20 is provided in the center of the top cover 20.
a is open, and the front panel box 2 is on the front side.
0b is formed, and a rear panel box 20c is formed on the rear side. The clothes inlet 20a is covered with an opening / closing lid 21 so as to be freely opened and closed, and the front panel box 20b is provided.
A control device 22 is installed therein, and a water supply solenoid valve 24 connected to a water injection port 23 is installed in the rear panel box 20c.

The inner tank 5 is constituted by fastening the lower end edge of a cylindrical body portion 5b made of stainless steel plate and the upper end edge of a bowl-shaped bottom portion 5c made of stainless steel plate by crimping. Bottom 5
The c is processed into a step so that the upper end connected to the body 5b has a larger diameter than the lower part into which the lower fluid balance ring 8 is fitted, and the back side of the bottom surface is reinforced by a flange 5d screwed. Dual output shaft 1 of clutch mechanism 16
The outer shaft of 6b is connected to the flange 5d. The inner shaft of the double output shaft 16b is the flange 5d.
And the bottom portion 5c, and the rotor blade 7 is coupled to the tip thereof. The rotary blade 7 has a back blade 7a on the back side thereof, which rotates integrally with the rotary blade 7.

As shown in FIG. 2, circulating water channel covers 26, 27, 28, 29 are provided on the inner wall surface of the inner tank 5 so as to face each other. The covers 26, 28 have a height up to the upper part of the inner tank wall surface (in the vicinity of the upper ballast ring 6), and at the lower part thereof face the outer periphery of the back blade 7a, and the water guide opening 26a,
28a are provided at a width of 90 ° with respect to the center of the tank. Further, as shown in FIG. 1, discharge openings 26b and 28b of the shower mechanism are provided on the upper part of the cover toward the inner side of the inner tank 5. Discharge opening 26b of the circulating water channel cover 26
A lint collecting net 30 is installed in the.

The circulating water channel cover 28 has a shape as shown in FIG. 3, and the shape of the discharge port forming the shower mechanism is shown in FIG.
As shown in FIGS. 5 and 6, it is composed of an upper fluid balance ring 6. The washing water discharged from the discharge opening 28b becomes a shower that spreads in a thin film over the entire area of the inner tub 5, sprinkles on the clothes, promotes early dissolution of the detergent and permeates the clothes, and improves the cleaning power. In order to spread this shower throughout the tub, first, the width of the water guide opening 28a is widened to 90 ° with respect to the center of the tub, and a large amount of washing water pushed out by the back blade 7a is guided to the upper part. The water channel up to has a cross-sectional area of 120 × 18.5 in order to suppress the loss, and a cross-sectional area of 203 × 5 in order to apply pressure to the washing water at the discharge opening 28b in order to fly the shower near the inner tank facing surface. Has a shape with.

Second, as shown in FIGS. 4 and 5, the side wall of the discharge opening 28b is outwardly inclined by an angle θ (55) with respect to the inside of the tank.
°) was added. Fig. 7 shows the tank diameter φ465.6.
Under the conditions of blade diameter φ375, blade rotation speed 140 rpm, reversal time limit 1.3 seconds ON-0.5 seconds OFF, water level 305 mm, discharge port height 390 mm, etc., angle θ and shower-
FIG. 3 shows an example of the spread of the angle .alpha., And the larger the angle .theta. Also, 7
When it is increased to 0 ° and 80 °, the upper fluid balance ring 6
The shower is hit hard and there is a problem of splashing water,
The angle θ is set to 55 ° so that the water is sprayed along the inner wall surface of the upper fluid balance ring 6. The bottom surface near the side wall is also provided with a surface 28c that is substantially the same as the height of the lower end of the discharge opening 26b so as not to impair the momentum of water.

Thirdly, as shown in FIG. 6, the upper fluid balance ring 6 which is the rear surface of the discharge port is formed as an inclined surface toward the center of the inner tank 5, and the surface 28 of the cover 28 which constitutes the front surface.
e is also a slope facing the center of the inner tank 5 so that the shower is smoothly projected forward. Circulation channel cover 27,
29 has a height up to the middle of the wall surface of the inner tank, and the lower portion of the water guiding opening 2 is narrower than the circulating water channel covers 26 and 28 at the lower portion.
7a and 29a, and the discharge openings 27b and 29 are provided at the top.
b is provided toward the inside of the inner tank 5. FIG. 9 is an example of this, in which (a) is discharged so that the washing water hits the wall at the upper end of the discharge opening so that the washing water gathers at the center of the tub, and (b) has the same shape as the circulating water channel covers 26 and 28. Therefore, the washing water can be spread and discharged.

As described above, in order to improve the lint collection performance of the four circulating water channel covers and realize a wide area shower in the tank, it is important to improve the circulating water amount. FIG. 8 shows an example of the relationship between the total area of the dehydration hole (water return hole) 5a and the bottom surface water return hole 8a and the circulating water amount. As the amount of circulating water increases, the water level in the outer tub 4 fluctuates more and more, and apparently the height from the water surface to the discharge port becomes higher and the amount of circulating water cannot be maintained. Therefore, the water is pushed up into the circulating water channel cover. In the meantime, the outer tank 4 must always be replenished with water. Therefore, the body 5
The areas of b, the bottom portion 5c, and the return holes 5a, 8a provided in the lower fluid balance ring 8 are as large as possible.
Further, the ribs forming the water passages of these circulation water passage covers may be provided with a self-adhesive packing in order to enhance water tightness.

10 and 11 show a cross section BB and a cross section CC of the washing and dehydrating tub of FIG. The lower fluid balance ring 8 forms a hollow by welding a ring-shaped lid 8b on the upper side and a ring-shaped case 8c on the lower side, but the back blade 7a and the water guide openings 26a to 29a are also welded. A skirt portion is provided on the lid 8b and the case 8c to prevent the protrusion from occurring, and the bag portions 8d, 8
constitutes e. Since the upper skirt of the mold cannot be formed on the outer peripheral side, a distance of L ₄ and L ₄ ′ from the bottom 5c of the inner tank is provided for consideration in assembly. Further, lugs lid side skirt portion 8f of the water guide openings on the inside by welding deviation, provided with a step of pre-L ₅ in order to prevent the lint that caught,
There is no problem if it is within the allowable deviation L ₅ .

It is desirable for the lower fluid balance ring 8 to have a large hollow volume for vibration isolation, but at the water guide opening, L ₈ cannot be extremely narrowed in order to secure the circulating water amount, so the height of the hollow portion is L _6. ≧ L ₇ is set. Furthermore,
A step portion 8g is provided on the lid 8b to prevent foreign matter such as coins from entering the gap G between the rotary blade 7 and the lower fluid balance ring 8. In FIG. 10, 8a
Is a bottom return hole, and water is supplied to the back blade 7a by the flow of the arrow.

As described above, the circulating water channel cover 28 that allows washing water to be sprayed over the entire tub by the shower mechanism from one place, the cover 26 for collecting lint with an increased circulating water amount, and the washing water for clothes even at an extremely low water level Covers 27, 29, 4 in total
It is possible to provide a fully-automatic washing machine that has excellent circulation, lint collection performance, anti-vibration, and a lower fluid balance ring that has unbalanced circulation channels to prevent imbalances. .

[0022]

According to the present invention, the washing water discharged from the discharge port of the shower mechanism of the circulating water channel is effectively diffused throughout the tank, and the circulating water channel is kept to the minimum necessary number. It is possible to improve the movement of the clothes and the washing power.

[Brief description of drawings]

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

FIG. 2 is a horizontal sectional view of the washing / dehydrating tub of FIG.

3 is a front view of the circulating water channel cover of FIG. 1. FIG.

FIG. 4 is a perspective view of a discharge port portion forming a shower mechanism of the circulating water channel cover of FIG.

5 is a top view of the circulating water channel cover of FIG. 3. FIG.

6 is a central cross-sectional view of the discharge port portion of FIG.

FIG. 7 is a diagram showing the relationship between the wide angle θ of the side wall of the discharge port and the degree of spread of the shower.

FIG. 8 is a diagram showing a relationship between a return hole area and circulating water amount.

FIG. 9 is an example of a circulation channel cover for ultra-low water level.

10 is a cross-sectional view taken along line BB shown in FIG.

11 is a cross-sectional view taken along line CC of FIG.

[Explanation of symbols]

4 ... Outer tub, 5 ... Washing / dehydrating tub, 6 ... Upper fluid balance ring, 7 ... Rotor blade, 7a ... Back blade, 8 ... Lower fluid balance ring, 26, 27, 28, 29 ... Circulating water channel cover,
30 ... A net for collecting lint.

Continued Front Page (72) Inventor, Yuzuru Miyano 1-1-1, Higashi-Tagacho, Hitachi City, Ibaraki, Ltd., Electric Appliances Division, Hitachi, Ltd. (72) Inventor, Kazutoshi Katane 1-1, Higashi-Tagacho, Hitachi City, Ibaraki Prefecture No. 1 Electric Company, Hitachi, Ltd.

Claims (3)

[Claims] 1. A washing / dehydrating tub, an upper fluid balance ring in which a fluid is enclosed in a hollow ring arranged at the upper end of the tub, and a rotary blade rotatably disposed on the inner bottom of the washing / dehydrating tub.
A back blade that rotates integrally with the back surface of the rotary blade, a drive device that reversely rotates the rotary blade, and a rotation source of the rotary blade that serves as a drive source to discharge washing water in the interior portion of the washing and dehydrating tub. In a fully automatic washing machine having a plurality of shower mechanisms, one of the plurality of shower mechanisms is capable of spraying the washing water over the entire area of the tub, and the one shower mechanism is provided. When the water level is above the midpoint of the height of the washing / dehydrating tub in the state of only water without laundry, if the washing water is sprinkled, the washing water will be in the center of the washing / dehydrating tub. A fully automatic washing machine characterized in that it is configured to expand the washing / dehydrating tub diameter ratio by 70% or more. 2. A fully automatic washing machine according to claim 1, wherein the side wall of the discharge opening of the shower mechanism has a wide angle of 30 ° or more. 3. The fully automatic washing machine according to claim 1, wherein the washing water discharged from the discharge opening of the shower mechanism spreads along the inner wall surface of the upper fluid balance ring.