KR100241960B1 - Fully automatic washing machine - Google Patents

Abstract

In the related art, it is inevitable that the gap between the outer tank and the dewatering speed cannot be increased due to the deformation and collapse of the washing / dehydration tank due to an imbalance at the time of dehydration. Therefore, the characteristics of this invention are using FRPP (containing about 7 to 12% of glass fiber) as a material of a fluid balancer, and improving ring-ring strength. With this feature of the present invention, a highly rigid laundry combined-use dehydration tank having good productivity at low cost can be obtained, and a high-speed dewatering and compact automatic washing machine can be provided.

Description

Fully automatic washing machine

The present invention relates to a fully automatic washing machine provided with a washing machine dehydration tank of high rigidity that can withstand high-speed dewatering rotation.

The stainless steel washing and dehydrating tank of the conventional fully automatic washing machine consists of a generally ring-shaped upper ring having a cylindrical body plate and a flange portion, and a generally disk-shaped bottom plate having recessed portions at the bottom, and the combination of each member is seaming. ), And a fluid balancer made of synthetic resin was attached to the upper ring.

In addition, the dehydration rotation speed was set to 900-1100 r / m when the inner diameter of the washing / drying dehydration tank was 450 mm to 470 mm. On the other hand, the dehydration rotation speed was 800-900 r / m in the structure without an upper ring.

However, with the upper ring attached, the number of parts increases, which is undesirable in terms of productivity and cost.

Moreover, in the structure without an upper ring, it was unavoidable to expand the clearance gap with the outer tank or to raise the spin speed by the deformation | transformation of the washing combined use dehydration tank by the imbalance at the time of dehydration, and fall.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a highly rigid washing combined dehydration tank having good productivity at low cost.

1 is a longitudinal sectional view of the washing machine of one embodiment of the present invention.

2 is a longitudinal cross-sectional view of a combined use dehydration tank of an embodiment of the present invention.

3 is a longitudinal cross-sectional view of a combined laundry dehydration tank showing a conventional example.

4 is a graph comparing the physical properties of FRPP.

5 is a graph comparing physical properties of FRPP.

6 is a graph showing the average thickness and deformation of the fluid balancer.

* Explanation of symbols for main parts of the drawings

2: washing and dehydrating tank 3: upper balancer

A feature of the present invention is to use fiberglass reinforced polypropylene (FRPP) (containing about 10% glass fiber) as the material of the fluid balancer, and to improve ring strength.

EMBODIMENT OF THE INVENTION Hereinafter, one Example of this invention is described based on drawing.

1 shows the basic structure of a fully automatic washing machine.

Reference numeral 1 denotes an outer frame made of a generally box-shaped steel sheet containing an internal mechanism, and reference numeral 2 denotes a stainless steel washing / dehydration tank, which forms a generally cylindrical shape having a bottom, and a plurality of sidewalls The hollow annular upper balancer 3 and the lower balancer 4 which have the dehydration hole 2a and the fluid was sealed in the upper part and the bottom part are provided, and the stirring blade 5 which is rotatable is arrange | positioned at the center of a bottom part.

Reference numeral 6 denotes a generally cylindrical outer tub having a bottom for receiving the washing water and rotatably enclosing the combined washing / dehydrating tank 2, and at the bottom, the driving part is attached through the central base 8 made of steel sheet. The outer wall of the outer tub 6 is provided with a concave spherical suspension rod holder 6a holding the dustproof device 9, and the entire outer tub is concave spherical shape fixed to the upper edge of the outer frame 1. Suspension dust-proof support is carried out from the corner plate 1a by the dustproof apparatus 9.

In addition, a synthetic resin bath cover 7 is fixed to the upper end opening in order to prevent the laundry from falling in the gap between the outer tub 6 and the combined washing / dehydration tank 2.

The vibration isolator 9 is comprised from the suspension rod 9a, the vibration-proof spring 9b, the sliding cylinder 9c, the spring support 9d, the suspension rod support 9e, etc.

A suspension rod support 9e having a convex spherical surface is fixed to the upper end of the suspension rod 9a, and the support 9e is fitted to the concave spherical surface of the corner plate 1a.

The sliding cylinder 9c has a block spherical surface fitted to the concave spherical surface of the suspension rod holder 6a, provides an anti-vibration spring 9b and a spring holder 9d therein, and vibrates in the vertical direction of the outer tub 6. The vibration damping spring 9b expands and contracts, and the spring receiving 9d vibrates while rubbing the inner surface of the sliding cylinder 9c.

The driving unit includes a motor 10, a clutch 11, a V belt 12, and the like, and the rotation of the motor 10 is performed through the motor pulley 13, the V belt 12, and the P pulley 14. To 11).

The clutch 11 has a clutch spring mechanism for switching washing and dehydration, a reduction gear, and the like, and a washing shaft 11a and a dehydration shaft 11b therein.

The stirring blade 5 is fixed to the washing shaft 11a, and the washing / dehydrating tank 2 is fixed to the dehydrating shaft 11b via the flange 15. When washing, the internal reduction gear and the washing shaft are fixed. The rotational force is transmitted to the stirring blade 5 via 11a, and at the time of dehydration, the rotational force is transmitted to the washing / drying dehydration tank 2 by the dehydration shaft 11b without passing through the reduction gear to perform dehydration.

The drainage device consists of a drain valve 5 and a drain hose 17. One end of the drain valve 16 is bonded to the drain port 6b provided at the bottom of the outer tub 6, and the other end is connected to the drain hose 17. The other end of the drain hose 17 is drawn out of the machine from the drain hose outlet 30.

The water level is detected by the water level sensor 20 from the air trap 6c provided in the outer tub 6 via the air tube 19.

Reference numeral 21 denotes a water supply solenoid valve, one end of which is connected to the faucet via a water supply hose, and the other end of which is connected to a water inlet 22.

Reference numeral 23 denotes a top cover having a panel box portion, in which a control unit 24 serving as a control unit, a water level sensor 20 for controlling the water level, a power switch 25, an input switch unit 26, and a progress display unit ( 27) is stored.

The panel box part 28 is provided in two places of a front side and a back side, and attaches the front panel 29 and the back panel 30, respectively.

Moreover, the upper cover 23 is provided with the cover 23 which opens and closes the opening part 23a for clothing | injection and the opening part 23a, and is comprised so that the upper opening part of the outer frame 1 may be covered.

The above is the whole structure.

Next, with reference to FIG. 2, the washing | cleaning combined use dehydration tank 2 is explained in full detail.

In the combined-use laundry dewatering tank 2, each of the body plate 41 and the bottom plate 42 is made of stainless steel plate.

The fuselage | board plate 41 shape | molds a flat plate in ring shape, fixes the edge part by seaming, and provides many burring | dehydration hole 2a toward the outside.

The bottom plate 42 has a generally disk-shaped shape, and fastens the outer peripheral portion of the end portion and the lower outer peripheral portion of the fuselage plate 41 by seaming 2b.

The upper end part of the fuselage | board body 41 is shape | molded in the shape of a curl, and the small diameter part 41a is provided and the cross section coefficient is raised.

The upper balancer 3 provides a skirt portion 3a on the outer circumferential portion, fits into the small diameter portion 41a of the body plate 41 and is fixed with a screw 43.

By providing the small diameter portion 41a, the outer diameter of the skirt portion 3a is made substantially the same as the outer diameter of the center portion of the fuselage plate 41, and the gap (about 15 mm) with the inner circumferential surface of the outer shell 6 is not reduced. have.

The lower balancer 4 is arrange | positioned in the form contained in the bottom plate 42, and is fixed by the screw 44 from the lower part of the bottom plate 42. As shown in FIG.

A flange 15 having a fitting hole with the dehydration shaft 11b is attached to the central lower portion of the bottom plate 42 with a screw 42, and the washing / dehydration tank 2 is fixed to the dehydration shaft 11b. .

During the dehydration operation, the washing combined dehydration tank (2) rotates at a high speed of about 1000 r / m in the form of an imbalance caused by the bias of the clothing, so that a large vibration occurs.

In order to reduce the vibration, the upper balancer 3 and the lower balancer 4 are provided. However, if the strength of the combined use dehydration tank 2 is insufficient, the combined use dehydration tank 2 is deformed by an unbalanced centrifugal force. The problem of contact with the outer tub 6 arises.

At this time, there is also a method of taking a large gap (about 15 mm) between the washing / dehydrating tank 2 and the outer tub 6, but it is not preferable because the appearance of the main body is increased and there is also a problem of vibration / noise.

As a deformation | transformation form of the washing-and-drying dehydration tank 2, it acts in the opposite direction to collapse, deformation, and imbalance in the vicinity of the dehydration coupling part of the whole washing-and-use dehydration tank 2 which is a single-axis support structure. The correcting force of the balancer includes elliptical deformation of the fuselage plate 41 and local expansion of the fuselage plate 41 of the unbalanced concentration portion.

The fall deformation is mainly caused by the bending moment applied to the bottom of the washing / dehydrating tank 2, so that the fuselage plate 41 and the bottom plate 42 are divided and the optimum plate thickness of the bottom plate 42 is selected. By the composite strength of the flange 15, the deformation can be suppressed to a predetermined amount or less.

Here, when the inner diameter of the fuselage plate 41 was 470 mm, the plate thickness of the bottom plate was 1.2 mm, and the plate thickness of the fuselage plate was 0.7 mm.

Regarding the elliptical deformation of the fuselage plate 41, as shown in FIG. 3, a generally disc-shaped stainless upper ring 46 having a flange is coupled to the upper end of the fuselage plate 41 by seaming, Although the press-ring strength of the fuselage | board body 41 was ensured, since the number of parts increased, it was unpreferable from a productivity and cost viewpoint.

Further, in the configuration without the upper ring 46, the spin speed was about 900 r / m.

Therefore, in the present invention, the material of the upper balancer 3, which was conventionally polypropylene (hereinafter referred to as PP), is made of glass fiber reinforced polypropylene (hereinafter referred to as FRPP), the bending elastic modulus is increased, and the ring strength of the upper balancer 3 is increased. Increased, and secured most of the required stiffness. Here, the content rate of glass fiber is 7 to 12%, Preferably it is set to about 10%.

As shown in FIG. 4 and FIG. 5, when content of glass fiber increases, mechanical strength will increase in proportion to it, but elongation will fall.

If the elongation rate decreases, cracks may occur due to a slight impact during assembly or transportation. In the worst case, shattering may occur in the breakdown mode, and there is a safety problem.

From the above, as shown in FIG. 6, the content of glass fiber is about 10%, the average thickness of the upper balancer 3 which is a hollow annular body is 3.5 mm, and is equivalent to the structure having the upper ring 46. Rigidity was obtained.

At this time, since the lower balancer 4 is contained in the bottom plate 42, general PP is sufficient.

In addition, since the normal expansion of the fuselage plate 41 occurs between the screws 43, the skirt portion 3a of the upper balancer 3 can be suppressed even if there is a slight circumferential difference.

A plurality of rear blades 5a are integrally provided on the rear surface side of the stirring blade 5, and a circulation path cover 48 is disposed on the inner circumferential sidewall surface of the washing / dehydrating tank 2, and the washing water circulation path 47 is provided. To form.

The circulation path cover 48 has a height up to the upper wall surface of the washing / dehydration tank 2, and the lower portion provides a frequency opening 49 against the outer circumference of the rear wing 5a.

The discharge port 50 is provided in the upper part of the circulation path cover 48 toward the inner direction of the washing | cleaning combined use dehydration tank 2.

A fluff collecting net 51 is detachably attached to the discharge port 50. In the case where a plurality of circulation paths 47 are provided, there is also a circulation path for jetting the washing liquid.

At the time of washing | cleaning, when a stirring blade rotates once, washing water is extruded to the frequency opening part 49 by the action of the centrifugal pump of a back wing, and it blows out from the discharge port 50 through the circulation path 47.

Reference numerals 52 and 53 denote burring-shaped water drain holes provided in the circulation passage 47.

This prevents water and residual water contained in the laundry from entering the circulation path 47 at the time of dehydration start, which prevents it from becoming unbalanced and amplifies the secondary resonance amplitude.

The horizontal cross section is for preventing lint and the like.

The upper water draining hole 52 works effectively when the dehydration starting characteristic at the time of a small load is favorable, and the lower water draining hole 53 is a function to act when the dehydration starting characteristic is moderate at the load of medium capacity or more. will be. Thereby, smooth dehydration starting is attained.

In addition, the water draining hole has almost no effect on the amount of circulating water since stagnant wash water is removed unless a plurality of holes having a diameter of about 5 mm are provided.

As described above, according to the present invention, by using glass fiber-containing PP (FRPP) of about 7 to 12% as the material of the upper balancer, a high-strength, high-strength laundry combined-use dehydration tank at low cost is obtained, and high-speed dehydration is possible. Fully automatic washing machine can be provided.

In the previous embodiment, FRPP is selected as the material, but the same effect can be obtained by developing another filler.

Claims (3)

Drives a combined laundry dehydration tank having a rotary blade at the bottom, an outer tub rotatably containing the combined laundry dehydration tank, a support device for dustproof supporting the outer tub by an outer frame, and driving the rotary blade and the combined laundry dehydration tank. A fully automatic washing machine comprising a driving device, wherein a fluid balancer made of a synthetic resin containing 7 to 12% of glass fiber is attached to an upper part of the combined washing / dehydration tank. The fully automatic washing machine according to claim 1, wherein the combined laundry dehydration tank is composed of a cylindrical body made of stainless steel plate and a generally disc shaped bottom plate part. The fully automatic washing machine according to claim 1, wherein a fluid balancer made of a synthetic resin containing about 10% of glass fibers is attached to an upper part of the combined washing and dehydrating tank.