KR20040108782A - A floatable sealed device used for automatical washing machine - Google Patents

Abstract

The floating sealing device of the water-saving type automatic washing machine includes a sealing lid 11 fixed inside the bottom of the outer cylinder 1, a support plate 5 fixed at the bottom of the inner cylinder 2, and an outer cylinder 1 and a sealing lid ( 11) and a drainage steel enclosed by the backing plate 5, and also a sealing ring 20 used to seal the gap between the sealing lid 11 and the backing plate 5. Its features are as follows: The sealing ring 20 surrounds the dehydration shaft 18a from the outside, and the annular floating body 20c sealing the gap between the sealing lid 11 and the support plate 5 is dehydrated ( You can float up along 18a). The upper surface of the floating sealing ring 20 and the bottom surface of the supporting plate 5 and the inner surface of the upper edge of the sealing lid are sealing surfaces, and also the sealing between the sealing lid 11 and the supporting plate 5 is sealed. It constitutes a part. Its advantages are good sealing effect, simple manufacturing and installation, and relatively low cost, so that the sealing part is inherently frictional, such as noise, excessive electricity consumption, and high resistance to dehydration startup. A series of problems were solved.

Description

A floatable sealed device used for automatical washing machine}

In the related art, the water-saving type automatic washing machine is a washing machine which mainly injects water into the inner cylinder of the washing machine and washes the washing machine without injecting water into the outer cylinder of the washing machine. Such a washing machine can save 20% to 30% of water than washing machines by injecting water into both the inside and the outer cylinder of the washing machine. Such water-saving fully automatic washing machine can refer to the contents disclosed in the "automatic washing machine" of Chinese Patent No. 95117171.2 and "saving type automatic washing machine" of Utility Model No. 97231435.0. The features of the structure of these patents and utility models are that the inner cylinder (also called a rotating cylinder or a dehydration cylinder) installed inside the outer cylinder has a hole in the lower side wall without a hole in the middle lower side and a row of holes only at the upper side, and an annular shape at the center of the bottom portion It is in the tub of the drainage hole installed with the In order not to inject water into the outer cylinder, the drain passage of the inner cylinder must be separated from the outer cylinder. That is, there must be a sealing device between the outer cylinder and the inner cylinder.

Such a sealing device is described in more detail in Chinese Utility Model No. 96228625.7, `` Sealing device between inner and outer cylinders of a washing machine '' and `` Water bottle of a water-saving fully automatic washing machine '' of 01218004.1. As shown in FIG. 1, the inner cylinder (2, ie, the aforementioned rotating cylinder) in the outer cylinder 1 includes a support plate 5 (also referred to as a flange plate) and a rotating sugar ring 6 (also referred to as a sealed container). It is fixed to the dehydration shaft 18a together. The drain passage of the inner cylinder (2) has a base plate (5) installed in the annular center of the bottom portion, a drain hole (7) penetrating through the rotational ring (6) and a sealing lid (11) installed inside the bottom of the outer cylinder (1) And a drainage cavity 16 at the bottom of the outer cylinder 1). The drainage river 16 is connected to the main drain pipe 13, the drain valve 14, and the drain pipe 21 through the main drain port 15. The sealing device associated with the drainage passage includes between the inner cylinder 2 and the backing plate 5, between the turning ring 6 and the backing plate 5, between the sealing lid 11 and the outer cylinder 1 and the turning ring 6. And sealing the gap between the upper portion of the rotary ring 6 in the center of the upper portion of the sealing lid. However, in fact, the other gaps other than the latter are all formed by connecting two parts with no relativity, so a static seal can easily meet the sealing requirement. The key of the sealing device is therefore the sealing against the gap between the latter-turning ring 6 mentioned above and the upper ring 11b of the sealing lid. The inner cylinder 2 can start rotation from the dehydration shaft 18a against the outer cylinder 1 to realize the dehydration operation. Rotational ring 6 has a relative movement with respect to the sealing lid (11). That is, the seal between them is a kind of axial sealant structure. As shown in FIG. 1, the gap between the outer circumferential surface 6a of the rotary sugar ring and the sealing lid 11b is sealed with the sealing ring 10. The sealing ring 10 is composed of a cylindrical outer rim on the inner side and an outer side, and an annular upper rim connecting the two outer rims in a single body. The upper and lower ends of the inner rim extend inclined inward, respectively, and there are extra upper and lower teeth that coincide with the outer circumferential surface 6a of the turning ring.

When washing, injecting water into the inner cylinder (2), the inner cylinder prevents water from flowing into the outer cylinder (1) through the sealing device described above, and at the same time, the water is closed by the drain valve (14) when washing. And only into the drainage cavity 16. When dewatering, the drain valve 14 is opened while the water in the inner cylinder 2 is discharged through the drain passage. Subsequently, while the inner cylinder rotates at a high speed, the water in the laundry rises along the wall of the inner cylinder under the action of centrifugal force, exits to the upper dewatering outlet (not shown), and collects in the outer cylinder 1 afterwards. It exits to the drain pipe 21 through the drain port 4 and the sub-drain pipe 1.

The disadvantages of the prior art are as follows.

(1) According to this conventional sealing structure of the prior art, since the toothed body of the sealing ring 10 is pressed against the outer circumferential surface 6a of the rotating ring which always rotates at high speed, the inner cylinder is sealed by friction when the inner cylinder rotates at high speed. As the life of the ring 10 is shortened, the sealing effect is reduced. This is because in the operation of the washing machine, the sealing part is in a dynamic sealing state in two processes, washing and dehydration. In the washing process, since the angle at which the inner cylinder 2 is rotated is very small, the relative motion of the teeth of the sealing ring 10 and the outer circumferential surface 6a of the rotating sugar ring is also small. At this time, it can be said that the sealing part is in a static sealing state with a medium. However, in the dehydration process, the outer circumferential surface 6a of the rotating sugar ring rotates at an inner cylinder 2 at a high speed of 800 times / minute or more, and rotates at a linear speed of 4 m / s corresponding to the engagement of the sealing ring 10. At this time, since the water in the drainage steel 16 has already drained, the seal is in a frictionless state without a medium, and the seal is also overmixed, and the friction force produced at this time is very large, and the outer circumferential surface 6a of the rotating sugar ring and the seal ring ( The contact part of the toothed body of 10) breaks, and the sealing effect falls, and the lifetime of the sealing part is shortened.

(2) The sealing part easily makes noise in high speed dry friction.

(3) If the frictional force is large, the output of the motor is consumed in a large amount, and if it is severe, it will be difficult to start the motor during the dehydration process.

(4) It will be relatively difficult to ensure the sealing performance in the manufacturing process. That is, it is because the toothed body of the sealing ring 10 and the outer circumferential surface 6a of the rotating sugar ring can have a good sealing performance only by having a relatively good concentricity. However, since the installation process is many and complicated, correlated parts are likely to cause manufacturing errors, and in particular, the outer cylinder 1 and the sealing lid 11 are very easily deformed into large plastic parts, and thus it is difficult to guarantee very good concentricity. Sometimes, in order to compensate for the installation error, the sealing tooth can increase the assembly excess amount of the rotational ring outer peripheral surface 6a. However, this may cause an increase in the frictional force of the seal, thus adding to the problems of (1) to (3) above.

(5) In order to solve the dynamic sealing problem, it is necessary to make the outer periphery (6) of the turning ring using materials that resist friction and corrosion. In addition, in order to reduce the damage of the sealing portion, the outer peripheral surface of the turning ring 6a should have a relatively high precision and surface roughness. All of these lead to an increase in cost, and it is necessary to improve the components of the material of the sealing ring 10 in order to solve the noise caused by dry friction and increase the life, which also causes an increase in the cost. If these measures are followed, the cost will not only increase drastically, but it will be difficult to achieve the ideal technical effect, which will limit the development of water-saving fully automatic washing machines.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The present invention relates to a sealing device for a washing machine, and more particularly to a water-saving fully automatic washing machine (floatable) sealing device.

1 is a sealing portion of the water-saving fully automatic washing machine of the prior art Front section view of the structure.

Figure 2 is a front sectional view of the first embodiment of the present invention.

3 is a front sectional view of a second embodiment of the present invention;

4 is a cross-sectional view of the sealing ring of the third embodiment of the present invention.

5 is a cross-sectional view of the sealing ring of the fourth embodiment of the present invention.

6 is a cross-sectional view of the sealing ring of the fifth embodiment of the present invention.

7 is a front sectional view of a sixth embodiment of the present invention.

8 is a front sectional view of a seventh embodiment of the present invention.

9 is a front sectional view of an eighth embodiment of the present invention.

Fig. 10 is a sectional view of the sealing portion of the ninth embodiment of the present invention.

11 is a cross-sectional view of a sealing ring of a tenth embodiment of the present invention.

Fig. 12 is a front sectional view of the sealing portion of the eleventh embodiment of the present invention.

13 is a front sectional view of a twelfth embodiment of the present invention;

In order to overcome the disadvantage that the sealing structure between the rotational ring of the conventional water-saving fully automatic washing machine and the inlet of the top of the sealing lid is easily worn and the sealing effect is lowered, the present invention provides a floating sealing device of the new water-saving fully automatic washing machine. Such a sealing device can effectively guarantee the sealing demands of the water-saving fully automatic washing machine, the certainty of the sealing and the long service life, etc., and can provide a water-saving fully automatic washing machine which is easy to install and low in cost.

The technical solution of the present invention used to solve the above technical problem is as follows:

Based on the characteristic that only the actual inner cylinder of the washing machine stores water, the sealing of the inner and outer cylinders is necessary only during the washing process, and the sealing is not necessary during the dehydration process, The inner cylinder stores the water by using the buoyancy and hydraulic pressure of the water by changing the dynamic sealing in the radial direction, that is, the axial rotational sealing into the axial or conical seal. When washing, the sealing ring floats to seal the gap between the sealing lid and the support plate and also to provide a reliable sealing. In addition, during dehydration, the water in the inner cylinder is discharged, the sealing ring is lowered as the water descends, and the sealing part is separated, thereby avoiding contact between the sealing ring and the component rotating at high speed. This avoids the friction caused by the seal and the many bad consequences that result.

The specific structure is as follows:

The sealing device includes a sealing lid fixed to the inner side of the bottom of the outer cylinder and a supporting plate fixed to the bottom of the inner cylinder and a drainage steel formed by surrounding the inner cylinder, the sealing lid and the supporting plate, and includes a sealing ring for sealing a gap between the sealing lid and the supporting plate. . Characteristically, the sealing ring encloses the dehydration shaft outside, and can float up along the dehydration shaft an annular floating body which seals the gap between the sealing lid and the backing plate. The upper surface of the floating sealing ring and the bottom surface of the supporting plate and the inner surface of the upper edge of the sealing lid are sealing surfaces, and the sealing surface is formed by combining the sealing portion between the sealing lid and the supporting plate.

When the washing process of the washing machine starts, water is injected into the inner cylinder and water is injected into the drainage cavity through the drain hole at the bottom of the inner cylinder. Since the drain valve is closed, the water is first filled in the drainage steel, and as the level of the drainage steel rises, the sealing ring rises upward due to the buoyancy action of the floating body, and at the set height, the upper surface of the sealing ring and the inner edge of the sealing lid and the backing plate Contact with the sealing surface on the bottom. As the water level rises further, the water pressure becomes larger and the water pressure acts on the floating body so that the upper surface of the sealing ring firmly presses the sealing surface, thereby sealing the passage of water between the inner and outer cylinders.

At the start of the dehydration process, the drain valve opens and water is discharged through the drain passage, such as the drain hole, the drain steel, the drain pipe and the drain valve. As the water level falls in the drainage river, the sealing ring descends due to its own gravity action, and when the water in the draining river is completely drained, the upper surface of the sealing ring, the inner surface of the upper edge of the sealing lid and the sealing surface of the backing plate are completely separated and the sealing ring descends. The discontinuous protrusions on the inner side of the lower part of the washing container support the sealing ring so that the water is smoothly drained. At this time, the inner cylinder rotates at high speed and the water in the laundry rises along the inner cylinder wall with centrifugal force, After exiting to the dehydration outlet of (not shown in the figure), collected in the outer cylinder (1), it is discharged to the drain pipe 21 through the sub-drain 4 and the sub-drain 19. Therefore, there is no water in the drainage steel 16, the sealing ring does not float and there is no contact with any moving parts, so no damage or noise problems occur.

In the present invention, the upper surface of the sealing ring has two sealing surfaces, and they are outer seal surfaces and inner seal surfaces, respectively. The sealing surface of the sealing lid is to be provided at a position corresponding to the sealing lid above the outer sealing surface of the sealing ring. Install the sealing surface of the supporting plate at the bottom of the supporting plate above the inner sealing surface and the corresponding area, and the inner and outer sealing surface of the sealing ring floated up contact with the sealing surface of the sealing lid to seal the gap between the sealing lid and the supporting plate. Let's do it.

In the present invention, the sealing surface of the sealing lid and the sealing surface of the backing plate are installed horizontally on the upper part corresponding to the inner and outer sealing surfaces of the sealing ring, and are also on the same horizontal surface. In addition, the height of the sealing surface of the sealing lid and the sealing surface of the backing plate may also be staggered in position, but the inner and outer sealing surfaces of the sealing ring must also be staggered correspondingly.

In the present invention, the sealing surface of the inner surface of the upper portion of the sealing lid and the bottom of the support plate may also be installed as a conical surface.

The outer diameter of the outer rim of the outer sealing surface of the sealing ring is larger than the inner diameter of the sealing surface of the sealing lid, and the inner diameter of the inner rim of the inner sealing surface is the annular maximum diameter of the drain hole arranged annularly at the bottom of the inner cylinder and the sealing surface of the backing plate. The inner or outer sealing surface of the sealing ring presses the sealing surface of the sealing lid and the supporting plate at the time of sealing, and seals the gap between the sealing lid and the supporting plate to seal the gap between the inner cylinder and the outer cylinder. To achieve the purpose of sealing.

In the present invention, the sealing surface of the sealing lid and the sealing surface of the base plate is a smooth surface, and the inner and outer sealing surfaces of the sealing ring are also smooth surfaces. Sealing of the inner and outer sealing surfaces of the sealing ring, the sealing surface of the sealing lid and the sealing surface of the backing plate is more secure when forming the sealing portion.

The present invention can be further improved. The sealing ring has one or more annular projections on the inner and outer sealing surfaces, and this constitutes the inner and outer sealing surfaces of the sealing ring located above the floating body. The annular projection of the sealing ring seals the gap between the sealing lid and the supporting plate by contacting the sealing surface of the sealing lid and the sealing surface of the supporting plate, respectively.

The present invention can be further improved. The sealing device may be a sealing surface of the sealing lid, the sealing surface of the backing plate may each have an annular projection. The end of the annular projection is on the same plane and the annular projection (end) of the inner and outer sealing surfaces of the raised sealing ring and the sealing surface of the sealing lid and the annular projection (end) on the sealing surface of the support plate are the sealing surfaces. The position of the end portion of the annular protrusion can be staggered in height, and the height of the inner and outer sealing surfaces of the sealing ring can be staggered correspondingly. The inner and outer sealing surfaces of the rising sealing ring respectively contact the annular projections of the sealing surface of the sealing lid and the annular projections of the sealing surface of the supporting plate to seal the gap between the sealing lid and the supporting plate.

The present invention can be further improved. The sealing ring has two sealing protrusions, respectively, an outer sealing protrusion and an inner sealing protrusion. The annular inner and outer sealing protrusions are respectively above the sealing ring floating body and constitute a sealing surface of the sealing ring. The sealing surface of the sealing lid is provided in a position corresponding to the sealing lid on the upper portion of the outer sealing protrusion, and the sealing surface of the supporting plate is provided at the bottom of the supporting plate on the upper portion of the inner sealing protrusion and in a corresponding portion thereof. By using such an annular shaped sealing projection structure, the compressibility can be increased to improve the reliability of the sealing.

The outer outer diameter of the outer sealing protrusion is larger than the inner diameter of the upper edge of the sealing lid and the inner diameter of the inner edge of the inner sealing protrusion is greater than or equal to the annular maximum diameter of the drainage holes of the annular arrangement at the bottom of the inner cylinder. The outer sealing protrusion and the inner sealing protrusion of the floating sealing ring respectively contact the sealing surface of the sealing lid and the sealing surface of the supporting plate to seal the space between the sealing lid and the supporting plate. If the height of the sealing surface of the sealing lid and the sealing surface of the support plate is staggered so that the height of the inner and outer sealing protrusions of the sealing ring is also staggered so that the outer sealing protrusion and the inner sealing protrusion of the floating ring are still respectively the sealing surface and the supporting plate of the sealing lid. Contact the sealing surface of the seal to seal the gap between the sealing lid and the backing plate.

The present invention can further improve the following. The sealing ring has an outer sealing protrusion and an inner sealing protrusion, and the sealing surface of the supporting plate is provided horizontally at a position corresponding to the bottom of the supporting plate above the inner sealing protrusion, and the outer sealing protrusion of the sealing ring has an annular hem. The upper border of the sealing lid must be fixedly connected. The outer sealing protrusion has a connecting body, and the connecting body has a sufficient length so that when the floating body of the sealing ring floats, the inner sealing protrusion and the sealing surface of the backing plate come into close contact to form a sealing part. When the washing machine is dewatered, if the water level in the drainage falls, the floating body is lowered, and the sealing surface of the inner sealing protrusion and the support plate is separated. The linkage can be made into a flexible linkage, which is like a wavy tubular shape. Thus, the rise and fall of the floating body is more smooth. The floating body of the sealing ring may be separated parts of the sealing ring consisting of the outer sealing protrusion, the inner sealing protrusion and the connecting body.

The present invention can further improve the following. The sealing ring has an outer sealing protrusion and an inner sealing protrusion, and the sealing surface of the supporting plate is horizontally installed at the bottom of the supporting plate at the upper portion of the inner sealing protrusion and the corresponding portion thereof to directly fix the annular hem of the outer sealing protrusion of the sealing ring. Seal the inside of the bottom of the laundry tub. The annular hem and the sealing lid are like one. Thus, the independent sealing cover is removed, thereby achieving a simple installation and lowering the cost of goods. The outer sealing protrusion has one connecting body, and the connecting body has a sufficient length so that the inner sealing protrusion and the sealing surface of the backing plate come into close contact with each other when the floating body of the sealing ring floats to form a sealing part. When the washing machine is dewatered, if the water level in the drainage river is lowered, the floating body is lowered, and the sealing surface of the inner sealing protrusion and the support plate is separated. The linkage can be made into a flexible linkage and is like a wavy tubular, so that the rise and fall of the float is more smooth. The sealing ring floating body may be separated parts of the sealing ring consisting of the outer sealing protrusion, the inner sealing protrusion and the connecting body.

The present invention can further improve the following. The sealing ring has an outer sealing projection and an inner sealing projection and installs a sealing surface of the sealing lid horizontally on the sealing lid and its corresponding portion above the outer sealing projection. The inner sealing protrusion of the sealing ring and the sealing surface of the support plate are fixedly connected to each other, and the inner sealing protrusion has a flexible connecting body. This flexible connecting body forms a sealing part by bringing the outer sealing protrusion and the sealing surface of the sealing lid into close contact with each other when the floating body of the sealing ring floats. When the washing machine is dewatered, if the water level in the drainage drops, the floating body is lowered, and the outer sealing protrusion and the sealing surface of the sealing lid are separated. The stretchable connector may be a stretchable wavy shape.

In the present invention, the floating body cutting surface of the sealing ring may be circular, rectangular, or other geometric shapes. The floating body may be an annular hollow sealing structure, or may be an annular hollow opening structure. The sealing ring floating body may be filled with a foaming material which is a material having a smaller specific gravity than water. The material filled in can increase the strength of the whole sealing ring. The entire sealing ring should be able to float in water.

In the present invention, when the sealing ring floating body has an annular hollow structure, the upper part is sealed and the bottom is opened, and the whole sealing ring should be able to float in the water under the action of the floating body.

In the present invention, the sealing ring is suitable for making a sealing ring such as rubber or other polymer material having good compressive force and relatively good mechanical strength and elasticity, and a material that can be used in detergents is suitable.

Another improvement of the present invention is as follows:

The outer seal surface and the inner seal surface of the sealing ring are composed of a material having high compressive force, good elasticity and high mechanical strength on the base material. For example, it is a rubber or other polymer material that is softer than the body material of the sealing ring. This can greatly save the manufacturing cost of the sealing ring.

Another improvement of the present invention is as follows:

The sealing surface of the sealing lid and the sealing surface of the backing plate combine a material having a high compressive strength, a good elasticity and a high mechanical strength on the base material. For example, it is a rubber or other polymer material that is softer than the body material of the sealing ring.

In the present invention, if the sealing surface of the sealing lid and the sealing surface of the backing plate are composited with a material having high compressive force, good elasticity and high mechanical strength, the sealing ring can be made using a relatively hard material, that is, plastic. Therefore, the cost can be lowered and the processing of the sealing ring can be simplified.

In the present invention, the composite includes various forms such as coating the surface, inlaying, gluing, and injection molding.

The beneficial effects of the present invention are as follows:

(1) The sealing ring is movable, so that the sealing surface, the sealing surface of the sealing lid and the sealing surface of the backing plate are horizontally contacted, and the sealing pressure is provided by hydraulic pressure. Further, if a plate-like sealing projection structure is used, the compressibility is better, or the sealing effect may be better if at least one material of the sealing portion has good compressibility, elasticity, and mechanical strength. For example, if the level of the inner cylinder during normal washing is about 25 ~ 50cm, the water pressure is 0.25 ~ 0.5 N / cm ² . If the inner diameter of the sealed gun is 8 cm and the outer diameter is 12 cm, the area of the hydraulic pressure received by the sealed ring is 62.8 cm ² , and the pressure received is 15.7 to 31.4 N. When the contact surface width is 2 mm, the contact pressure of the seal is 1.25 to 2.5 N / cm ² , and the water pressure is 5 times.

(2) The concentricity of the planar seal in the axial direction is not as high as the requirement of the dynamic seal in the radius, and the level of contact and departure of the seal is adjusted. Therefore, the sealing device of the present invention is much easier to manufacture and install, and the cost is relatively low.

(3) The avoidance of contact between the sealing ring and the high speed inner cylinder and other associated components has fundamentally solved several problems, such as friction caused by the sealing and the resulting noise, high power consumption, and greater resistance to dehydration starting.

(4) Since the demand of the sealing ring material in the present invention is not high, and the manufacturing cost is eliminated, the high turn sugar ring (up to the sealing lid), the overall machine manufacturing cost will be lowered.

(5) Manufacturers of washing machines such as TOSHIBA and SHARP in Japan have been using water-saving washing machines (for example, Japanese Patent No. 54-12098, Japanese Patent No. 61-9878). Domestic washing machine manufacturers also developed the same products in the 90s of the 20th century. However, the dynamic sealing between the outer cylinder and the inner cylinder was not well solved, and thus it was not widely distributed in large quantities all the time. Using the sealing device of the present invention can solve the sealing problem relatively well, it will be advantageous to apply to the spread of water-saving automatic washing machine.

Floating sealing device of the water-saving automatic washing machine shown in Figure 2 is a first embodiment of the present invention. In the figure, the seal is in two states, the left seal is in a separated state (no dehydration or inner cylinder), the right side is in a sealed state, and the seal ring 20 is between the seal lid 11 and the support plate 5. Seal gaps (washing or inner water storage). The sealing device includes a sealing lid 11 fixed inside the lower part of the outer cylinder 1 and a supporting plate 5 fixed to the lower part of the inner cylinder 2, and the outer cylinder 1 and the sealing cover 11 Drainage steel 16 is surrounded by the backing plate 5, and the sealing ring 20 for sealing the gap between the sealing lid 11 and the backing plate (5) is included. Among them, the support plate 5 can rotate together with the inner cylinder 2, that is, move relative to the sealing lid (11). The sealing surface 11a of the sealing lid installed on the inner surface of the upper lid of the sealing lid 11 is an outer seal of the sealing surface 5a of the supporting plate of the bottom outer edge of the supporting plate 5 and the upper surface of the sealing ring 20. The surface 20e and the inner sealing surface 20f become a sealing surface, and they combine to form a sealing portion between the sealing lid 11 and the backing plate 5. The sealing surface 11a of the sealing lid and the sealing surface 5a of the base plate are on the same horizontal surface. The main body of the sealing ring 20 is a floating body 20c made of rubber and can float itself sufficiently by buoyancy generated in water. It is planar with the upper surface of the sealing surface and the outer sealing surface 20e and the inner sealing surface 20f are installed in the upper portion, and the inner diameter of the annular floating body is the drainage hole 7 of the annular arrangement at the bottom of the inner cylinder 2 The outer diameter is larger than the inner diameter of the sealing surface 11a of the sealing lid, and smaller than the inner diameter of the upper ring 11b of the sealing lid. The sealing ring 20 is enclosed outside the dehydration shaft 18a and floats up along the dehydration shaft 18a to seal the gap between the sealing lid 11 and the support plate 5.

When the washing process of the washing machine is started, water is injected into the inner cylinder 2, and when water is injected into the drainage steel 16 through the drain hole 7, the sealing ring as the water level in the drainage steel 16 rises. 20 rises up by the buoyancy action of the floating body 20c. When the water level reaches a certain level, the outer sealing surface 20e and the inner sealing surface 20f on the upper surface of the sealing ring 20 that floated are in contact with the sealing surface 11a of the sealing lid and the sealing surface 5a of the support plate, respectively. As the water level rises further, when the water in the inner cylinder 2 is sufficient, the water pressure becomes larger, and the water pressure acts on the sealing ring 20 so that the pressure on the sealing surface is further increased, so that the pressure between the sealing surface 11 and the support plate 5 is increased. Can be sealed securely. That is, the passage of the water between the inner cylinder 2 and the outer cylinder 1 is sealed. It is as showing the right sealing ring 20 of FIG.

At the start of the dehydration process, the drain valve 14 is opened, and the water is drained out of the drain hole 7 and the drainage cavity 16 and the main drain 15, the main drain 13, the drain valve 14, the drain 21 Drain through. As the water level in the drainage steel 16 falls, the sealing ring 20 descends down under its own gravity, and when the drainage ring 16 is completely drained, the sealing ring 20 is under the outer cylinder 1. Descend to the part. The sealing ring 20 completely separates the sealing surface 11a and the supporting plate 5a of the sealing lid. In the present invention, when the distal protrusions 1b are disposed on the inner surface of the bottom of the outer cylinder 1, and the water level in the drainage cavity 16 decreases, the protrusions 1b support the sealing ring 20. Allow water to drain smoothly. When the inner cylinder 2 is rotated at high speed and dewatered, the water of the laundry rises along the inner wall of the inner cylinder 1 under the action of centrifugal force and falls into the upper dewatering outlet (not shown). After gathered in the outer cylinder (1) through the sub-drain (4) and the sub-drain (19) is discharged directly to the drain pipe (21). At this time, the drainage steel 16 is always in a state without water, and the sealing ring 20 does not rise and does not come into contact with any moving parts. There is no damage or noise problem. It is as having shown the left sealing ring 20 of FIG.

Water-saving fully automatic washing machine floating sealing device shown in Figure 3 is a second embodiment of the present invention. The difference from the first embodiment is that the sealing ring 20 has two sealing protrusions, the outer sealing protrusion 20a and the inner sealing protrusion 20b, which are annular pieces. It is formed and located on the top surface of the sealed ring floating body 20c. The floating body 20c is a hollow sealing structure that generates buoyancy in water to float the entire sealing ring 20. The outer diameter of the outer sealing protrusion 20a is larger than the inner diameter of the sealing surface 11a of the sealing lid, is smaller than the inner diameter of the upper ring 11b of the sealing lid, and the inner diameter of the inner sealing protrusion 20b is the drainage hole of the annular arrangement ( It is larger than the annular maximum diameter of 7). When the sealing ring 20 rises up to a constant height by buoyancy action of the floating body 20c, the outer sealing protrusion 20a and the inner sealing protrusion 20b of the sealing ring 20 are respectively sealed surfaces 11a of the sealing lid. And the sealing surface 5a of the support plate. As the water level rises further, the water pressure becomes larger, and the water pressure acts on the sealing ring 20 so that the outer sealing protrusion 20a and the inner sealing protrusion 20b are respectively sealed on the sealing surface 11a of the sealing lid and the sealing surface of the support plate ( 5a) is tightly pressed to seal the gap between the sealing lid 11 and the support plate 5. It is as showing the right sealing ring 20 of FIG.

During the washing machine dehydration process, the water in the inner cylinder is completely drained and the sealing ring 20 is lowered to the bottom of the outer cylinder 1 by the action of its own gravity to seal the outer sealing protrusion 20a and the inner sealing protrusion 20b of the sealing lid. The sealing surface 11a and the sealing surface 5a of the backing plate are completely separated so that there is no contact with any moving parts, so that no damage or noise problems occur. It is the same as the left sealing ring 20 of FIG.

In addition, the floating body 20c in the present embodiment is separated into two independent parts by the annular inner sealing protrusion 20b and the outer sealing protrusion 20a on the upper portion thereof, which can bring about the same technical effect. Rather, the sealing ring of such a separate structure can be more easily realized in production, which is beneficial to lower costs.

The sealing ring shown in Figure 4 is a third embodiment of the present invention. The floating body 20c of the sealing ring 20 is an annular open type hollow structure, the cut surface is "?" Shaped and the bottom portion is open, the outer sealing projection (two at each of the two corners of the upper part of the floating "?" Shaped ( 20a) and the inner sealing protrusion 20b are connected. The floating body 20c floats the whole sealing ring 20 in water by the buoyancy which arises in water.

The sealing ring shown in Figure 5 is a fourth embodiment of the present invention. The floating body 20c has an annular open hollow structure, the cut surface of which is circular, and the lower portion thereof is open, and the outer sealing protrusion 20a and the inner sealing protrusion 20b are connected to the upper portion of the floating body 20c, respectively. There is. The two sealing protrusions form an inverted octagonal "Y" shape at an angle to the horizontal line. The floating body 20c generates buoyancy in water to float the entire sealing ring 20 in water.

The sealing ring shown in Figure 6 is a fifth embodiment of the present invention. The floating body 20c of the sealing ring 20 has an annular hollow core sealing structure, and filled with a foam material in an empty container. The outer side sealing protrusion 20a and the inner side sealing protrusion 20b of a piece form a "Y" shape, are located in the upper part of the floating body 20c of the sealing ring 20, and are integral with the floating body 20c. .

The floating sealing apparatus of the water-saving fully automatic washing machine shown in FIG. 7 is a sixth embodiment of the present invention. The difference from the second embodiment is that the outer sealing protrusion 20a of the sealing ring 20 and the upper ring 11b of the sealing lid are connected in a high-tight seal, and between the outer sealing protrusion 20a and the floating body 20c. There is a connecting body 20d, and the length of the connecting body 20d is formed by closely contacting the inner sealing protrusion 20b with the sealing surface 5a of the backing plate when the floating body 20c of the sealing ring floats. do. When the floating body 20c descends, the inner sealing protrusion 20b and the sealing surface 5a of the support plate are separated by self-gravitation of the sealing ring 20.

When the washing process of the washing machine starts, the water level in the drainage steel 16 rises, and the floating body 20c of the sealing ring leads the inner sealing protrusion 20b to rise. The connecting body 20d is inclined upward by being pulled by the fixed end floating body 20c, and the inner sealing protrusion 20b of the center portion is close to the sealing surface 5a of the support plate. When the water level reaches a certain level, the inner sealing protrusion 20b floating up presses the sealing surface 5a of the support plate under the action of the buoyancy and hydraulic pressure of the floating body 20c to form a seal between the inner cylinder 2 and the outer cylinder 1. . It is as showing the right sealing ring 20 of FIG. During the dehydration process, as the water level in the drainage steel 16 drops, the inner sealing protrusion 20b and the floating body 20c descend by their own gravity action. Seal separation is as shown in the left sealing ring 20 of FIG. In the present embodiment, the outer sealing protrusion 20a is fixed, and the inner sealing protrusion 20b moves upward, and one sealing protrusion and the sealing surface are fixed to make the sealing more secure. In addition, the problem of axial mounting error can be solved. In addition, in the present embodiment, the floating body 20c and the annular inner and outer sealing protrusions and the connecting body 20d of the upper part are separated into two independent parts to achieve the same technical effect. Rather, the sealing ring of such a separate structure is easier to produce and beneficial to lower costs.

The floating sealing device of the water-saving type automatic washing machine shown in FIG. 8 is a seventh embodiment of the present invention. The difference from the sixth embodiment is that the floating body 20c of the sealing ring 20 has a hollow sealing structure, and the cut surface model is a circular or other geometric model in the drawing. The inner sealing protrusion 20b is fixed between the bottom surface of the base plate 5 and the flange top surface of the reducer 18 to simultaneously seal. The drainage hole 7 corresponding to the inner sealing projection 20b opens the corresponding hole position and the fixed position design to keep the drain passage of the inner cylinder 2 from being blocked. The inner sealing protrusion 20b has a corrugated pipe-shaped connecting body 20d, and its stretching length is sufficient for the outer sealing protrusion 20a and the sealing lid when the floating body 20c of the sealing ring 20 rises up. The sealing surface 11a is in intimate contact to form a sealing portion. When the floating body 20c descends, the outer sealing protrusion 20a and the sealing surface 11a of the sealing lid are separated.

When the washing process of the washing machine starts, the water level in the drainage steel 16 rises, the floating body 20c pulls up the sealing motive 20a, and the sealing surface of the sealing lid under the action of buoyancy and hydraulic pressure of the floating body 20c. The pressure 11a is firmly pressed to form a seal between the inner cylinder 2 and the outer cylinder 1. It is as having shown the right sealing ring 20 of FIG. During the dehydration process, as the drain valve 4 is opened and the water level in the drainage steel 16 is lowered, the sealing ring 20 descends by its own gravity action and leaves the seal. It is as having shown the left sealing ring 20 of FIG. Even if the sealing ring 20 rotates at high speed with the inner cylinder 2, if the design is justified, the centrifugal force will prevent the sealing ring 20 from colliding with the sealing lid 11 or bringing friction. In this embodiment, the inner sealing protrusion 20b is fixed, and the outer sealing protrusion 20a uses the system of axial movement. The manufacture of the sealing ring 20 is relatively simple and the cost is low.

In addition, in the present embodiment, the floating body 20c may be separated from the annular inner and outer sealing protrusions and the connecting body 20d on the upper part thereof, thereby achieving the same technical effect as two independent parts. The sealing ring of this separating structure is easier to produce and is advantageous in lowering the cost.

The floating sealing apparatus of the water-saving fully automatic washing machine shown in FIG. 9 is an eighth embodiment of the present invention. The difference from the sixth embodiment is to make the sealing device simpler. In the sixth embodiment, the annular hem of the lower part of the outer sealing protrusion 20a of the sealing ring 20 is directly fixed, and sealed inside the bottom part of the outer cylinder 1, and the annular hem and the bottom of the outer cylinder 1 are fixed. The inner portion of the portion formed the drainage steel 16. Therefore, the independent sealing lid 11 was removed, and the assembly work was simplified and the cost of goods was achieved. In the present embodiment, the inner sealing surface 20f of the sealing ring 20 and the sealing surface 5a of the support plate form a sealing portion to seal the passage between the inner cylinder 2 and the outer cylinder 1.

When the sealing ring 20 rises upward due to the buoyancy action of the floating body 20c and reaches a certain level, the inner sealing surface 20f of the sealing ring 20 comes into contact with the sealing surface 5a of the support plate. When the inner cylinder 2 is filled with water, the hydraulic pressure acts on the floating body 20c and the inner sealing surface 20f so that the inner sealing surface 20f tightly presses the sealing surface 5a of the support plate to the inner cylinder 2. And the passage of water between the outer cylinder (1). It is as shown to the right sealing ring 20 of FIG. After the water in the drainage steel 16 is drained, the sealing ring 20 is lowered to the bottom of the outer cylinder 1 so that the inner sealing surface 20f completely leaves the sealing surface 5a of the support plate. It is the same as what was shown to the left sealing ring 20 of FIG.

The floating sealing device of the water-saving fully automatic washing machine shown in FIG. 10 is a ninth embodiment of the present invention. The difference from the above embodiment is that the sealing surface 11a of the sealing lid and the sealing surface 5a of the backing plate are installed as conical surfaces, and the cutting surface of the floating body 20c of the sealing ring 20 is circular and has good compressibility and elasticity. This ensures the authenticity of the seal.

The sealing ring shown in Fig. 11 is a tenth embodiment of the present invention. The difference from the above embodiment is that the sealing ring 20 of this embodiment has an annular hollow sealing structure so that the outer sealing surface 20e and the inner sealing surface 20f are not in the same horizontal plane, and the outer sealing surface 20e ) Is lower than the inner sealing surface 20f, the outer sealing surface 20e and the inner sealing surface 20f each have one annular projection 22, and the annular projection 22 of the sealing ring 20. End portions of the sealing lids 11a and sealing plates 5a of the backing plate respectively contact with the sealing lid 11 and the backing plate 5 to seal the gap.

The floating sealing apparatus of the water-saving fully automatic washing machine shown in FIG. 12 is an eleventh embodiment of the present invention. The present embodiment differs from the above embodiment in that the sealing surface 11a of the sealing lid and the sealing surface 5a of the backing plate each have one annular projection 22, so that the sealing ring 20 is fixed upward. When rising to the height, the outer sealing surface 20e and the inner sealing surface 20f of the sealing ring respectively contact the ends of the annular projection 22 to seal the gap between the sealing lid 11 and the supporting plate 5. .

The floating sealing apparatus of the water-saving fully automatic washing machine shown in FIG. 13 is a twelfth embodiment of the present invention. The difference from the sixth embodiment is that the outer sealing protrusion 20a of the sealing ring 20 and the upper ring 11b of the sealing lid are fixedly connected to each other, and the sealing protrusion 20a has a flexible tubular tube shape. It has a connecting body 20d, and the extension length of this connecting body 20d is the inner sealing protrusion 20b and the sealing surface 5a of a support plate closely when the floating body 20c of a sealing ring rises up. Contact to form a seal. When the floating body 20c descends, the inner sealing protrusion 20b and the sealing surface 5a of the support plate are contracted by the self-weight of the sealing ring 20 and the contracting action of the corrugated tubular connecting body 20d of the sealing protrusion 20a. This separates.

When the washing process of the washing machine starts, the water level in the drainage steel 16 rises, the floating body 20c of the sealing ring 20 raises the inner sealing protrusion 20b, and the corrugated tubular connector 20d Stretches up The inner sealing protrusion 20b tightly presses the sealing surface 5a of the support plate by the buoyancy and hydraulic action of the floating body 20c to form a seal between the inner cylinder 2 and the outer cylinder 1. It is as showing the right sealing ring 20 of FIG. During the dehydration process, as the water level in the drainage steel 16 drops, the inner sealing protrusion 20b and the floating body 20c have their own gravity action and the contraction of the corrugated connector 20d of the outer sealing protrusion 20a. Descend into action. Departure of the seal is as shown in the left seal ring 20 of FIG. In the present embodiment, the outer sealing protrusion 20a is fixed, and the inner sealing protrusion 20b is moved upward, so that one sealing protrusion and the sealing surface are fixed so that the sealing will be more secure, and the axial installation The error problem can be solved.

The present invention as described above is more reliable, easier to manufacture and installation, lower cost, and also fundamentally solved problems such as noise due to friction, power consumption, large resistance to dehydration start.

Claims (22)

It encloses the sealing lid 11 fixed inside the bottom part of the outer cylinder 1, the support plate 5 fixed to the bottom part of the inner cylinder 2, the outer cylinder 1, the sealing lid 11, and the support plate 5, In the floating sealing device of the water-saving automatic washing machine comprising a drainage steel 16 and a sealing ring 20 for sealing a gap between the sealing lid 11 and the support plate 5, The sealing ring 20 surrounds the dehydration shaft 18a from the outside, and the annular floating body 20c sealing the gap between the sealing lid 11 and the support plate 5 is upward along the dehydration shaft 18a. The inner surface of the upper surface of the sealing ring 20, the bottom surface of the supporting plate 5, and the upper edge of the sealing lid, which can be floated, are the sealing surface, and the sealing surface 11 is the sealing lid 11 Floating sealing device of a water-saving automatic washing machine, characterized in that for coupling the sealing portion formed between the base and the support plate (5). The method of claim 1, The upper surface of the sealing ring 20 has two sealing surfaces, that is, the outer sealing surface 20e and the inner sealing surface 20f, and the sealing above the outer sealing surface 20e of the sealing ring 20. The sealing surface 11a of the sealing lid is provided at the lid 11 and the corresponding portion, and the sealing surface 5a of the supporting plate at the lower portion of the supporting plate 5 above the inner sealing surface 20f and corresponding thereto. The outer sealing surface 20e and the inner sealing surface 20f of the sealing ring 20 floating up are respectively in contact with the sealing surface 11a of the sealing lid and the sealing surface 5a of the support plate. 11) Floating sealing device of the water-saving automatic washing machine, characterized in that for sealing the gap between the support plate (5). The method of claim 2, The sealing surface 11a of the sealing lid and the sealing surface 5a of the support plate are installed horizontally on the upper portion corresponding to the outer sealing surface 20e and the inner sealing surface 20f of the sealing ring, and on the same horizontal surface. Floating sealing device of a water-saving fully automatic washing machine characterized in that there is. The method of claim 2, The sealing surface 11a of the sealing lid and the sealing surface 5a of the support plate are installed horizontally on the upper portion corresponding to the outer sealing surface 20e and the inner sealing surface 20f of the sealing ring 20, and The height is staggered, and the height of the outer sealing surface (20e) and the inner sealing surface (20f) of the sealing ring 20 is also floating floating device of the water-saving automatic washing machine, characterized in that the position. The method of claim 1, Floating sealing device of a water-saving type automatic washing machine, characterized in that the inner surface of the upper edge of the sealing lid 11 and the lower surface of the support plate (5) is a conical surface. The method of claim 2, The sealing ring 20 has at least two or two or more annular projections, which are attached to the outer sealing surface 20e and the inner sealing surface 20f of the sealing ring 20 at the upper portion of the floating body 20c. And an annular protrusion above the sealing ring 20 contacts the sealing surface 11a of the sealing lid and the sealing surface 5a of the supporting plate, respectively, so as to be provided between the sealing lid 11 and the supporting plate 5. Floating sealing device of a water-saving automatic washing machine characterized in that the gap is sealed. The method according to any one of claims 1 to 5, Floating sealing device of a water-saving automatic washing machine, characterized in that each of the sealing surface (11a) of the sealing lid and the sealing surface (5a) of the support plate has an annular projection, the end portion of the annular projection is located on the same plane . The method according to any one of claims 1 to 5, It has a round annular projection on the sealing surface (11a) of the sealing lid and the sealing surface (5a) of the backing plate, the height of the end of the annular projection is staggered, and the outer sealing surface (20e) of the sealing ring (20) A floating sealing device of a water-saving type automatic washing machine, characterized in that the height of the internal sealing surface 20f is also staggered. The method of claim 1, The sealing ring 20 has two sealing protrusions, which are divided into an outer sealing protrusion 20a and an inner sealing protrusion 20b, and the annular outer sealing protrusion 20a and the inner sealing protrusion 20b are sealed. It is uniformly positioned on the upper part of the floating body 20c of the ring 20 to form a sealing surface of the sealing ring 20, and the sealing lid 11 above the outer sealing protrusion 20a and the corresponding portion of the sealing lid The sealing surface 11a is provided, and the floating type of the water-saving type automatic washing machine is characterized in that the sealing surface 5a of the supporting plate is provided on the bottom surface of the supporting plate 5 above the inner sealing protrusion 20b and correspondingly. Sealing device. The method of claim 1, The sealing ring 20 has two sealing protrusions, which are divided into an outer sealing protrusion 20a and an inner sealing protrusion 20b, and the lower portion of the supporting plate 5 above the inner sealing protrusion 20b. The sealing surface 5a of the support plate is installed in a corresponding place, and the outer sealing protrusion 20a and the upper edge of the sealing lid 11 are fixedly connected, and the outer sealing protrusion 20a and the floating body 20c are connected. The connecting body 20d is installed between the inner and outer sealing protrusions 20b and the supporting plate 5a when the length of the connecting body 20d is sufficient so that the floating body 20c of the sealing ring floats upward. A floating sealing device for a water-saving fully automatic washing machine, characterized in that the sealing portion is formed to be in intimate contact. The method of claim 10, Floating sealing device of the water-saving type automatic washing machine, characterized in that the floating body (20c) of the sealing ring and the annular inner, outer sealing projection and the connecting body (20d) of the upper portion is separated into two independent bodies. The method of claim 10, Floating sealing device of a water-saving fully automatic washing machine, characterized in that the connector (20d) is a stretchable structure. The method of claim 9, The sealing ring 20 has two sealing protrusions, which are distinguished by the outer sealing protrusion and the inner sealing protrusion, and the sealing surface 11a of the sealing lid at a position corresponding to the sealing lid 11 above the outer sealing protrusion 20a. The inner sealing protrusion 20b and the supporting plate 5 are fixedly connected to each other, and a connecting body 20d is installed between the inner sealing protrusion 20b and the floating body 20c, and the connecting body ( 20d) is long enough, water-saving automatic washing machine, characterized in that the sealing portion is formed so that the outer sealing protrusion (20a) and the sealing surface (11a) of the sealing lid in close contact when the floating body (20c) of the sealing ring is floating. Floating sealing device. The method of claim 13, The floating ring 20c of the sealing ring is one independent part of the sealing ring, and the sealing ring constituted by the outer sealing protrusion and the connecting body 20d in the annular upper portion thereof is separated into another independent part. Floating sealing device of water-saving automatic washing machine. The method of claim 14, Floating sealing device of a water-saving type automatic washing machine characterized in that the connecting body (20d) is a structure that can be stretched. The method according to any one of claims 1 to 6 or 9 to 15, The floating body of the water-saving type automatic washing machine characterized in that the floating body (20c) of the sealing ring (20) is an annular hollow sealing structure, the cut surface of which is an arbitrary geometric shape. The method of claim 16, Floating type sealing device of the water-saving fully automatic washing machine, characterized in that the floating body (20c) of the sealing ring 20 is filled with a material having a specific gravity less than water. The method according to claim 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, or 15, The floating body (20c) of the sealing ring (20) is an annular open type hollow structure, the upper part is sealed, the lower surface is a floating sealing device of the water-saving automatic washing machine, characterized in that the open. The method according to claim 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, or 15, Floating sealing device of the water-saving type automatic washing machine, characterized in that the surface of the sealing surface of the sealing ring 20 is covered with a material of good compressibility, elasticity and mechanical strength of one layer. The method according to any one of claims 1 to 15, Floating sealing device of a water-saving automatic washing machine, characterized in that the sealing surface (11a) of the sealing lid and the sealing surface (5a) of the backing plate is covered with a material of good compressibility, elasticity and mechanical strength of one layer. The method according to claim 7 or 8, Floating sealing device of the water-saving type automatic washing machine, characterized in that the surface of the sealing surface of the sealing ring 20 is covered with a material of good compressibility, elasticity and mechanical strength of one layer. The method of claim 1, There is an annular hem in the lower part of the sealing ring 20, the hem and the sealing lid 11 is composed of a single body, the flexible connection between the hem and the floating body 20c (20d) Of the water-saving type automatic washing machine characterized in that the connecting body (20d) is in close contact with the sealing surface (20f) of the sealing ring 20 and the sealing surface (5a) of the support plate to form a sealing portion. Floating Sealing Device.