JPH02152Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a washing machine that performs rinsing by injection dehydration in a dehydration tank.

(b) Conventional technology Generally, a water receiving device is provided on the cover (inner lid) that opens and closes the top of the dehydration tank, and water is injected into the dehydration tank through this device. In some cases, it is not possible to provide a water receiving device, so the shape of the cover itself must be designed in place of a water receiving device. The cover is preferably made of a transparent or semi-transparent material so that the inside of the tank can be easily viewed, but in any case, it is an integrally molded product made of resin. When molding such a cover, since the bottom surface of the cover is relatively flat, it often bites into the upper and lower molds.
It may be difficult to release from the mold. In addition, the bottom surface curves upward, and water is poured only around the bottom surface.

In the case of rinsing, the injected water will flow from the inside to the outside due to centrifugal force, so it is most advantageous to inject water into the center of the dehydration tank.

Therefore, a water receiver having a shape based on this point is disclosed in Japanese Utility Model Application Publication No. 55-156680 (see FIG. 6). In the figure, 51 is a water inlet provided approximately in the center, 52 is a water supply receiving part that receives water from a water source, and 53 is a substantially circular arc extending from the water supply receiving part 52 and communicating with the water inlet 51. The water passages 54 are a large number of water sprinkling holes that disperse and discharge the water received by the water receiving portion 52.

However, this water receiver is located at the central water inlet 5.
Since the water from step 1 is not in a shower shape, for example, if you set up a water sprinkling tube in the center of the dehydration tank and pour water into the water sprinkling tube, this is fine, but it is better to pour water directly into the dehydrated material instead of through the water sprinkling tube. In this case, the water is concentrated in one point and forms a film in that area, making it difficult for water to penetrate downward.

Further, since each side wall 53a forming the water passage 53 is vertically erected, there is a risk that water may splash upward or outward due to the force of the collision.

(c) Problems to be solved by the invention This invention enables water injection with less bias, and
This ensures the amount of water injected into the center to compensate for the rinsing action.

Furthermore, the structure is such that water can easily penetrate to the bottom of the dehydrated material and that water is difficult to splash.

(d) Means for solving the problem The washing machine of the present invention performs rinsing by water injection dehydration in the centrifugal dehydration tank in the dehydration receiving tank.
The clothes input port of the top plate disposed at the upper opening of the dehydration tank is opened and closed by a dish-shaped safety cover, and a water injection hole is provided at least on the entire bottom surface of the safety cover opposite to the upper opening of the dehydration tank. At the same time, a water inlet is integrally formed on the side wall of the safety cover, a stepped portion is provided at approximately the center of the bottom surface of the safety cover, and the peripheral side wall of the safety cover is inclined outward. Furthermore, a protrusion is provided on the bottom surface of the safety cover to buffer and disperse water from the inlet.

(E) Function: In other words, the stepped portion facilitates mold release and also acts as a reinforcement to suppress warpage.

Furthermore, water is injected from the entire safety cover in a shower-like manner, and the water permeates below the dehydrated material, and the slanted peripheral side wall buffers the impact force of the water. In particular, the stepped section ensures the amount of water injected in the center.

Furthermore, the protrusion buffers the water pressure from the inlet and disperses it over the entire bottom surface of the safety cover.

(f) Embodiment To explain based on the drawings, 1 is a two-tub washing machine in which a washing tub 3 and a dewatering tank 4 are arranged side by side in a machine frame 2, and a control box 5 is arranged at the upper rear part. A large-diameter chevron-shaped pulsator (not shown) is disposed at the inner bottom of the washing tub 3, and is rotated at a low speed during washing. A dehydration tank 6 whose upper opening edge is curled inward is disposed within the dehydration receiving tank 4. This dehydration tank 6 has a dehydration hole 7 bored in the upper part of the circumferential side, and is connected to a motor rotating shaft 8 for "dehydration" by continuous clockwise rotation, and "dehydration" by intermittent clockwise rotation with pauses while pouring water. ``Rinsing'' is performed.

Reference numeral 9 denotes a top plate fixed to the upper opening of the dehydration receiving tank 4, forming a clothes input port 10.

Reference numeral 11 designates a dish-shaped safety cover for opening and closing the clothes input port 10, and its rear portion is pivotally supported within the control box 5. The safety cover 11 is a transparent resin molded product integrally molded using a mold with upper and lower parts cut out, and the peripheral side wall is inclined so as to expand slightly outward. Then, an inlet 12 facing the center is cut out in the curved wall at the back left corner of the circumferential wall, and the height (cutting amount l) is used to form a horizontally long inlet, and an overflow hole 13 is formed at the rear of the circumferential wall. are doing. In addition, a large number of water injection holes 14 are formed in the entire bottom surface, and a circular stepped portion 15 is formed in the center of the bottom surface to facilitate punching out of the mold.
is formed. Further, this safety cover 11 has a dispersion protrusion 16 projecting from the bottom surface of the inlet 12 at a position slightly to the right of the center of the hole.
The dispersion protrusion 16 has a steep slope on the side near the introduction port 12, a gentle slope on the opposite side, and gradually widens from the side near the introduction port 12 toward the center of the bottom surface to improve the overall plane. The viewing angle is approximately triangular. The height (H) of the top of the dispersion protrusion 16 is approximately equal to the height (M) of the upper hole edge of the introduction port 12. Note that the lower hole edge of the inlet 12 has a predetermined height (m) from the bottom surface.

Reference numeral 17 is a box-shaped indicator device installed at the top of the washing tub 3, which displays the amount of water supplied by discharging the supplied washing water into the tub with varying widths, or by discharging water from a specific water outlet. do.

Reference numeral 18 denotes a water supply hose attachment port provided in the middle of the control box 5, and by manually switching the water supply direction from side to side, water is supplied to the washing water supply path 19 and the rinsing water supply path 20 in the box 5. . Here, the supply path 19 supplies water to the indicator device 17 . Further, the supply path 20 extends diagonally to the right toward the dehydration tank 16, and then bends slightly to the left before fitting into the introduction port 12. And this supply route 1
Ribs 21 for rectification are arranged in parallel on the bottom surfaces of the tubes 9 and 20 in parallel with the flow direction.

Reference numeral 2 denotes a resin bowl-shaped cap disposed on the inner bottom surface of the dehydration tank 6 to hide the connecting portion with the motor rotating shaft 8, and has water injection holes 23 bored therein. A lower injection channel 24 is formed between the lower surface of the cap 22 and the bottom surface of the tank.

Reference numeral 25 denotes a cylindrical water injection tube disposed coaxially within the dehydration tank 6, in which two identical plates made of relatively flexible resin are integrally molded and are engaged with each other at both ends of each plate. It is formed by This water injection tube 25 has grooves 26 vertically inclined to the left, and circular and oblong water holes 27 arranged in tandem between the grooves 26 along the grooves. In addition, the water passage holes 27 are made to become denser toward the bottom. 28 is a gap retaining rib formed on the outer surface of the water injection tube 25 in a large number to protrude in the vertical direction;
An upper injection channel 29 is secured between the inner peripheral surface of the dewatering tank 6 and the outer surface of the water injection tube 25. The upper injection channel 29 and the lower injection channel 24 communicate with each other.

Reference numeral 30 denotes a flexible dehydration tank lid which is suitably applied to the upper opening of the dehydration tank 6, which is secured by a curled portion, and has a large number of small holes formed therein.

The washing machine 1 washes in the washing tub 3, performs rinsing if necessary, and performs water injection rinsing and dehydration in the dewatering tank 4. In particular, when we explain the operation inside the dehydration tank 4, we first start with normal “dehydration”.
The dehydration tank 6 is activated by setting the timer.
Rotate clockwise at approximately 1.400 rpm to perform centrifugal dehydration.

"Water rinsing" is set using the same timer, but the dewatering display and another adjacent water rinsing display are set, and the degree (number of times) of water rinsing is also matched. Then, the dehydration tank 6 first rotates clockwise for about 50 seconds, then stops for about 40 seconds after braking and inertia for about 30 seconds.
This is then repeated a maximum of 5 times and a minimum of 3 times as one cycle. On the other hand, rinsing water is continuously introduced into the safety cover 11 from the supply path 20, and falls from there into the dehydration tank 6 through the water injection holes 14, etc. Here, the rinsing water passing through the supply channel 20 is rectified by the rectifying ribs 21, and when the flow rate and flow velocity are small, it flows along the supply channel 20 and is uniformly distributed from the entire area of the inlet 12 onto the bottom surface of the cover. pervades. but,
When the flow rate and flow velocity are large, the flow tends to be biased toward the right side wall of the supply path 20 beyond the rectifying ribs 21 (see the one-dot chain line in FIG. 5), and is introduced from the inlet 12 as it is. At this time, the uneven rinsing water coming out of the inlet 12 heads toward the dispersion protrusion 16 which is also arranged unevenly, collides with it, and is dispersed almost equally to the left and right.
Then, it is uniformly diffused onto the bottom surface, pools in a thin layer, and falls from the water injection holes 14. Dehydration tank 6
The rinsing water inside the tank is directly absorbed by the laundry at the top of the tank, and then gradually penetrates into the middle part where it is absorbed. On the other hand, water flows down through the upper and lower water injection channels 29 and 24 to the middle and lower laundry items.
7 Water is absorbed from... Also, the rinsing water is in the concave groove 26.
Water flows down and is absorbed. Dehydration hole 7 of dehydration tank 6...
is present only in the upper part and the rinsing water does not drain out, and the water holes 27 are formed more densely in the lower part.
Rinse water is well absorbed by the laundry in the middle and lower parts.

Here, when centrifugal force is applied, the water absorbed into the laundry is discharged through the water passage holes 27... and the dewatering holes 7..., and by repeating water absorption and dewatering several times in this way, the laundry becomes The detergent solution inside is diluted and so-called rinsing is performed.

In this embodiment, the diameter of the water injection holes 14 is φ2.5 at the peripheral portion and φ3 at the other portions, and the amount of water supplied to the safety cover 11 is approximately 12 l/min. Also,
A transparent outer cover (not shown) is provided on the top of the safety cover 11 so that the bottom surface of the cover and the inside of the dehydration tank 16 can be visually observed.

In this embodiment, the lower edge of the inlet 12 has a height (m) in order to prevent backflow to the inlet 12.

Further, in this embodiment, since the introduction port 12 is formed in the inclined peripheral side wall of the cover 11, molding can be performed using a mold with upper and lower holes. The vertical width (l) of this inlet 12 is set so that the amount of water flowing into the safety cover 11 does not overflow outside the cover.

Furthermore, in this embodiment, a circular stepped portion 15 is formed on the bottom surface of the safety cover 11 to facilitate mold release. Further, the stepped portion 15 also serves as a reinforcing rib to prevent the bottom surface from warping up even if a flat bottom surface is formed.

Also, if the washing machine is slightly tilted when installed,
The water introduced into the safety cover 11 tends to flow toward the inclined side, resulting in uneven water injection into the dehydration tank 6. However, in this embodiment, no matter which direction it is tilted, the stepped section 15 located in the center fulfills the water storage function, and the water inlet 14 is also provided here, so the rinsing water is not necessarily poured into the stepped section 15. The water is introduced first, and from there it is supplied to the center of the dehydration tank where it is most effective. In other words, even if the washing machine is installed slightly tilted, the amount of rinsing water can be ensured.

Furthermore, in this embodiment, the peripheral side wall of the safety cover 11 is inclined outward at an angle of about 60 degrees, for example. This is to prevent water flowing out from the inlet 12 with a high flow rate from overflowing by dispersing it in the circumferential direction. That is, if the circumferential wall is made vertical, for example, the water is likely to splash upwards and outwards due to the force of the collision, and to easily fly out of the cover 11.

(g) Effects of the invention In this invention, a stepped portion with a water injection hole is formed at approximately the center of the bottom of the cover, so the stepped portion not only facilitates mold release, but also acts as a reinforcement to suppress warpage. Even if the top washing machine is installed at a slight angle, water will easily enter the stepped section, so the amount of water injected in the central section can be ensured, and rinsing performance can be guaranteed.

Furthermore, since water is injected from the stepped portion in a shower-like manner, water easily penetrates below the dehydrated material. Furthermore, by sloping the circumferential wall of the safety cover outward, the pressure when the water from the inlet collides with the circumferential wall can be buffered, and splashing of water can be suppressed.

Furthermore, since the protrusion buffers the pressure of water from the inlet and disperses it over the entire bottom surface of the safety cover, water can be injected from the entire bottom surface of the safety cover in a shower-like manner.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway and partially transparent front view of the washing machine according to the present invention, Figure 2 is a sectional view of the dewatering tank, etc., Figure 3 is a sectional view of the safety cover, and Figure 4 is the same. FIG. 5 is a perspective view in a cutaway state, FIG. 5 is a plan view showing the water supply operation, and FIG. 6 is a perspective view of a conventional water receiver. 4...Dehydration receiving tank, 6...Dehydration tank, 9...Top plate, 10...Clothing slot, 11...Safety cover,
12... Inlet, 14... Water injection hole, 15... Paragraph section.

Claims (1)

[Scope of utility model registration request] In a device that performs rinsing by injection dehydration in a centrifugal dehydration tank inside the dehydration tank, the clothes input port on the top plate located at the upper opening of the dehydration tank can be opened and closed using a dish-shaped safety cover. A large number of injection holes are formed at least on the entire bottom surface of the safety cover facing the upper opening of the dehydration tank, and a water inlet is integrally formed on the side wall of the safety cover, and a water inlet is formed integrally with the side wall of the safety cover. A stepped portion is provided in the center, the circumferential wall of the safety cover is inclined outward, and a protrusion is provided on the bottom surface of the safety cover to buffer and disperse water from the inlet. A washing machine with special features.