WO2003097920A1 - Dispositif d'etancheite flottable pour lave-linge automatique - Google Patents

Dispositif d'etancheite flottable pour lave-linge automatique Download PDF

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Publication number
WO2003097920A1
WO2003097920A1 PCT/CN2003/000346 CN0300346W WO03097920A1 WO 2003097920 A1 WO2003097920 A1 WO 2003097920A1 CN 0300346 W CN0300346 W CN 0300346W WO 03097920 A1 WO03097920 A1 WO 03097920A1
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WO
WIPO (PCT)
Prior art keywords
sealing
ring
floating body
tray
water
Prior art date
Application number
PCT/CN2003/000346
Other languages
English (en)
French (fr)
Inventor
Xiaozhou Ye
Original Assignee
Xiaozhou Ye
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiaozhou Ye filed Critical Xiaozhou Ye
Priority to AU2003242097A priority Critical patent/AU2003242097A1/en
Priority to JP2004505429A priority patent/JP4119889B2/ja
Priority to KR1020047017922A priority patent/KR100627116B1/ko
Publication of WO2003097920A1 publication Critical patent/WO2003097920A1/zh

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Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F17/00Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid
    • D06F17/06Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid by rotary impellers
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26Casings; Tubs
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F23/00Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry 
    • D06F23/04Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and rotating or oscillating about a vertical axis

Definitions

  • the present invention relates to a sealing device for a washing machine, and more particularly to a floating body type sealing device for a water-saving type fully automatic washing machine. Background technique
  • a water-saving automatic washing machine mainly refers to a washing machine in which the outer tub of the washing machine does not store water and only the inner tub stores water for washing.
  • Such a washing machine is The automatic washing machine can save 20% ⁇ 30% of washing water.
  • This water-saving type full-automatic washing machine is disclosed in Chinese invention patent 95 1 1 71 71 .2 "Full-automatic washing machine” and utility model patent 9723 1435.0 "Water-saving full-automatic washing machine”.
  • the structural features are as follows:
  • the inner bucket also known as a rotating bucket and a dehydration bucket
  • the outer bucket does not store water, and the drainage channel of the inner bucket must be isolated from the outer bucket, that is, a sealing device is also provided between the outer bucket and the inner bucket.
  • the drainage channel of the inner bucket 2 includes a drainage tray 7 penetrating the tray 5 and a rotary retaining ring 6 centrally arranged at the bottom of the inner bucket 2 and a tapered sealing cover 1 1 (also called a seal) provided inside the bottom of the outer bucket 1. Box and cover) and a drainage cavity 16 formed on the bottom surface of the outer tub 1, and the drainage cavity 16 communicates with the main drainage pipe 13, the drainage valve 14 and the drainage pipe 21 through the main drainage opening 15.
  • the sealing device related to the drainage channel includes a pair of the inner bucket 2 and the tray 5, a rotary retaining ring 6 and the tray 5, a sealing cover 11 and the outer bucket 1, and a rotary retaining ring 6 and an upper end of the sealing cover.
  • the seal in the center that accommodates the gap between the upper ports of the rotary retaining ring 6, but in fact, since the other gaps are formed by connecting two parts without relative movement, it is easy to use a static seal Ground to meet the sealing requirements, so
  • the real key to the placement is the sealing of the gap between the latter listed above-the rotary retaining ring 6 and the bezel on the sealing cover. Because the inner tub 2 can be rotated relative to the outer tub 1 by the dewatering shaft 18a to realize the dehydration action, the rotary retaining ring 6 will also rotate as the inner tub 2 rotates. Therefore, the rotary retaining ring 6 is relatively moved relative to the sealing cover 11 That is, the seal between them is a shaft-type rotary seal structure. As shown in FIG.
  • a sealing ring 10 which is formed by cylindrical outer edges located on the inner and outer sides and two outer edges.
  • the upper and lower ends of the inner edge are respectively formed with an upper lip and a lower lip which are inclined inwardly and in interference fit with the outer cylindrical surface 6a of the rotary retaining ring.
  • the inner tub relies on the above-mentioned sealing device to prevent water from flowing to the outer tub.
  • the rotation angle of the inner tub 2 is small, and the relative movement of the lip teeth of the sealing ring 10 and the outer cylindrical surface 6a of the rotating retaining ring is small, and the seal can be regarded as being in a static seal with a medium;
  • the outer cylindrical surface 6a of the retaining ring will rotate at a high speed with the inner bucket 2.
  • the rotational speed may be as high as 800 rpm or more.
  • the linear speed of the lip teeth relative to the seal ring 10 may be more than 4m / s. At this time, the water in the drainage chamber 16 has been discharged.
  • the seal is in a dry friction state without medium, and the seal is an interference fit, so the friction between The force is very large, and it is easy to cause abrasion at the contact portion between the outer cylindrical surface 6a of the rotary retaining ring and the lip and teeth of the seal ring 10, resulting in seal failure and reduced life of the seal.
  • the seal is extremely prone to noise during high-speed dry friction.
  • the large friction force will consume a large amount of power of the motor, which will cause the motor to start difficult during dehydration.
  • the present invention provides a floating body-type sealing device for a water-saving automatic washing machine, which can The sealing requirements of the water-saving automatic washing machine are reasonably completed.
  • the sealing is reliable, the life is long, and the manufacturing and installation are easy, and the cost is low, which is conducive to promoting the development of the water-saving automatic washing machine.
  • the technical solution used by the present invention to solve its technical problems is: According to the characteristics that the inner tub and the outer tub need to be isolated and sealed during the water storage and washing of the inner tub, and the dehydration process does not need to be sealed, the prior art sealing device is changed. Between the lip teeth of the middle seal ring and the rotary retaining ring The radial dynamic seal, that is, the shaft-type rotary seal is an axial flat or tapered surface seal. A floating seal ring is used. The buoyancy and water pressure of the water are used to achieve the inner ring storage and washing. The gap between the trays is reliably sealed, and the water in the inner tub is drained during dehydration. The sealing ring is lowered as the water drops, and the seals are separated, avoiding contact between the sealing ring and high-speed rotating parts, thereby avoiding sealing. There are frictions and a series of adverse consequences.
  • the sealing device includes a sealing cover fixed on the inner side of the bottom of the outer barrel, a tray fixed on the bottom of the inner barrel, a drainage cavity surrounded by the outer barrel and the sealing cover and the tray, and a seal for closing the space between the sealing cover and the tray.
  • the gap sealing ring is characterized in that: the sealing ring is a ring-shaped floating body sleeved on the dehydration shaft and capable of floating along the dehydration axis to close the gap between the seal cover and the tray; the upper surface of the floating seal ring and the bottom surface of the tray and The inner surface of the upper edge of the sealing cover is a sealing surface, and the sealing surface is combined to form a seal between the sealing cover and the tray.
  • the inner tub is filled with water, and the water is injected into the drainage cavity through the drainage hole at the bottom of the inner tub.
  • the water is first filled into the drainage cavity.
  • the sealing ring acts on the buoyancy When it rises downward, at a certain height, the upper surface of the seal ring contacts the inner surface of the upper edge of the seal cover and the sealing surface of the bottom surface of the tray.
  • the water pressure further increases, and the water pressure acts on the floating body to seal
  • the upper surface of the ring is pressed against the sealing surface to achieve the purpose of closing the water channel between the inner and outer buckets.
  • the drain valve When the dehydration process starts, the drain valve is opened, and water is discharged through drainage channels such as drain holes, drain chambers, drain pipes, and drain valves. As the water level in the drain chamber drops, the sealing ring drops under the effect of its own gravity. When the internal water is drained, the upper surface of the seal ring is completely separated from the inner surface of the upper edge of the seal cover and the seal surface of the bottom surface of the tray. The seal ring is lowered and supported by discontinuous ribs on the inside of the bottom of the washing tub to allow the water to drain away smoothly.
  • the inner bucket rotates at high speed, and the water contained in the clothing rises along the inner bucket wall under the action of centrifugal force, and is thrown out from the upper water outlet for dehydration (not shown in the figure), collected by the outer bucket 1, and then passed through the drain port 4.
  • Drain pipe 1 9 It is discharged to the drainage pipe 21, so there will be no water in the drainage chamber, the seal ring will not float, and the seal ring will not contact any moving parts, so there is no problem of wear and noise.
  • the upper surface of the sealing ring according to the present invention has two sealing surfaces, which are an outer sealing surface and an inner sealing surface, respectively.
  • a sealing cover sealing surface is provided at a corresponding position of the sealing cover above the outer sealing surface of the sealing ring, and above the inner sealing surface.
  • the bottom of the tray corresponds to a tray sealing surface, and the outer and inner sealing surfaces of the floating seal ring are in contact with the sealing cover sealing surface and the tray sealing surface, respectively, and close the gap between the sealing cover and the tray.
  • the sealing surface of the sealing cover and the sealing surface of the tray are horizontally arranged outside the sealing ring, correspondingly above the inner sealing surface and on the same horizontal plane; or the height positions of the sealing surface of the sealing cover and the sealing surface of the tray can be staggered, but The outer and inner sealing surfaces of the seal ring are also staggered by the corresponding degrees.
  • the sealing surface of the inner surface of the upper edge of the sealing cover and the bottom surface of the tray according to the present invention may be provided as a tapered surface.
  • the outer diameter of the outer edge of the outer sealing surface of the above-mentioned seal ring is larger than the inner diameter of the sealing surface of the seal cover.
  • the outer and inner sealing surfaces of the seal ring are pressed against the sealing surface of the sealing cover and the sealing surface of the tray, and the gap between the sealing cover and the tray is closed to achieve the purpose of closing the water channel between the inner and outer barrels.
  • the sealing surface of the sealing cover and the sealing surface of the tray are smooth surfaces, and the outer and inner sealing surfaces of the seal ring are also smooth surfaces. In this way, when the outer and inner sealing surfaces of the sealing ring form a seal with the sealing cover and the sealing surface of the tray, the sealing will be more reliable.
  • the sealing ring may further have one or more annular protrusions at the outer and inner sealing surfaces, and it is located above the floating body to form the outer and inner sealing surfaces of the sealing ring.
  • the tops of the annular protrusions on the sealing ring are in contact with the sealing surface of the sealing cover and the sealing surface of the tray, respectively, and close the gap between the sealing cover and the tray.
  • the sealing device may also be an annular protrusion on the sealing surface of the sealing cover and the sealing surface of the tray, respectively, and the annular protrusion has a top position.
  • the annular protrusions (top ends) of the outer, inner sealing surface and sealing cover sealing surface of the floating seal ring and the annular protrusions (top ends) of the sealing surface of the tray are the sealing surfaces.
  • the top positions of the annular protrusions may be staggered, and the heights of the outer and inner sealing surfaces of the seal ring may be staggered correspondingly.
  • the outer and inner sealing surfaces of the floating seal ring are in contact with the annular protrusion on the sealing surface of the sealing cover and the annular protrusion on the sealing surface of the tray, respectively, and close the gap between the sealing cover and the tray.
  • the sealing ring has two sealing lips, which are an outer sealing lip and an inner sealing lip respectively, and the annular outer and inner sealing lips are located on the upper part of the floating body of the sealing ring to form the sealing surface of the sealing ring
  • a sealing cover sealing surface is provided at a position corresponding to the sealing cover above the outer sealing lip, and a tray sealing surface is provided at a position corresponding to the bottom of the tray above the inner sealing lip.
  • the outer diameter of the outer edge of the outer sealing lip is larger than the inner diameter of the upper edge port of the sealing cover, and the inner diameter of the inner edge of the inner sealing lip is greater than or equal to the annular maximum diameter of the drainage holes arranged at the bottom of the inner barrel.
  • the outer sealing lip and the inner sealing lip of the floating seal ring are in contact with the sealing surface of the sealing cover and the sealing surface of the tray, respectively, and close the gap between the sealing cover and the tray. If the height positions of the sealing cover sealing surface and the tray sealing surface are staggered, the heights of the outer and inner sealing lips of the sealing ring are staggered correspondingly, so that the outer sealing lip and the inner sealing lip of the floating sealing ring are still respectively separated from the sealing cover sealing surface. It is in contact with the sealing surface of the tray and closes the gap between the sealing cover and the tray.
  • the present invention can also make the following improvements:
  • the sealing ring has an outer sealing lip and an inner sealing lip, and a tray sealing surface is horizontally disposed at a position corresponding to the bottom of the tray above the inner sealing lip.
  • the outer sealing lip of the sealing ring has An annular skirt is fixedly connected to the upper edge of the sealing cover.
  • the outer sealing lip has a connection body.
  • the connecting body has a sufficient length to make the inner ring of the seal ring in close contact with the sealing surface of the tray when the floating body of the seal ring floats. When the washing machine is dehydrated, the water level in the drainage chamber drops, and the floating body drops.
  • the sealing lip is separated from the sealing surface of the tray.
  • the connecting body can be made into a retractable connecting body, such as a corrugated tube, so that the floating body can be lifted and lowered more smoothly.
  • the seal ring floating body can also be separated from the seal ring parts composed of the outer seal lip, the inner seal lip and the connecting body.
  • the sealing ring has an outer sealing lip and an inner sealing Lip
  • the tray sealing surface is set horizontally at the bottom of the tray above the inner sealing lip
  • the annular skirt of the aforementioned outer sealing lip of the seal ring is directly fixed and sealed inside the bottom of the washing tub, which is equivalent to sealing the annular skirt with the seal
  • the cover is integrated into one body, thereby eliminating the need for an independent sealing cover, thereby achieving the purpose of simplifying the assembly process and reducing product costs.
  • the outer sealing lip has a connecting body. The length of the connecting body is sufficient to make the inner sealing lip and the sealing surface of the tray tightly contact to form a seal when the floating body of the seal ring floats.
  • the connecting body can be made into a retractable connecting body, such as a corrugated tube, so that the floating body can be lifted and lowered more smoothly.
  • the seal ring floating body can also be separated from the seal ring parts composed of the outer seal lip, the inner seal lip and the connecting body.
  • the seal ring has an outer seal lip and an inner seal lip, and a seal cover sealing surface is horizontally arranged at a position corresponding to the seal cover above the outer seal lip; the inner seal lip of the seal ring and The sealing surface of the tray is fixed and closed; the inner sealing lip has a retractable connecting body, which is sufficient to make the outer sealing lip in close contact with the sealing surface of the sealing cover when the floating body of the seal ring floats; when the washing machine is dehydrated, The water level in the drainage chamber drops, the floating body drops, and the outer sealing lip is separated from the sealing surface of the sealing cover.
  • the telescopic connecting body may be telescopic corrugated.
  • the cross section of the floating body in the seal ring of the present invention may be circular, rectangular, or other geometric shapes.
  • the floating body may be a ring-shaped hollow closed structure or a ring-shaped open cavity structure, and the sealed concrete floating body may be filled with a material having a specific gravity smaller than water, such as a foamed material.
  • the filler material in the middle can increase the overall rigidity of the seal ring.
  • the seal as a whole should be able to float in the water.
  • the floating body of the sealing ring according to the present invention is a ring-shaped open cavity structure, the upper part is closed and the bottom surface is open.
  • the entire sealing ring should be able to float in water under the action of the floating body.
  • the seal ring is preferably made of a rubber or other high-molecular material having good compressive properties, high mechanical strength, and elasticity, and is suitable for use as a seal ring and suitable for working in a washing liquid.
  • Another improvement of the present invention is that: the outer and inner sealing surfaces of the seal ring are composited on a substrate with a material having strong lamination, high elasticity, and high mechanical strength, such as a rubber softer than the material of the seal ring body Or other polymer materials, which can greatly save the manufacturing cost of the seal ring.
  • Another improvement of the present invention is that the sealing surface of the sealing cover and the sealing surface of the tray
  • the material is compounded with a material with strong lamination denaturation, good elasticity and high mechanical strength, such as rubber or other polymer materials that are softer than the seal ring material.
  • the sealing ring can be made of a relatively hard material such as plastic, thereby reducing costs and simplifying sealing. Processing technology of the circle.
  • the composite includes various forms such as surface coating, inlaying, bonding, injection molding and the like.
  • the beneficial effects of the present invention are: (1) Since the seal ring is floating, its sealing surface is in flat contact with the sealing cover sealing surface and the tray sealing surface, and the sealing pressure is provided by water pressure, as long as the contact surface is sufficiently large and smooth, The seal must be reliable. If the sheet-shaped sealing lip structure is further used, the pressure change is better, or at least one of the materials in the seal is pressure change, elastic and mechanical strength is good, and the sealing effect will be better. For example, when the water level of the inner tub is about 25 ⁇ 50cm in general washing, the water pressure is 0.25 ⁇ 0.5N / cm 2.
  • the area of the seal ⁇ bearing water pressure is about 62.8 cm 2 , with a pressure of 15.7N ⁇ 3 1.4N.
  • the contact pressure of the seal is 1.25 2.5 N / cm 2 , which is five times the water pressure.
  • FIG. 1 is a front sectional view of a sealing sub-structure of a water-saving automatic washing machine of the prior art.
  • Fig. 2 is a front sectional view of a first embodiment of the present invention.
  • Fig. 3 is a front sectional view of a second embodiment of the present invention.
  • Fig. 4 is a sectional view of a seal ring according to a third embodiment of the present invention.
  • Fig. 5 is a sectional view of a seal ring according to a fourth embodiment of the present invention.
  • Fig. 6 is a sectional view of a seal ring according to a fifth embodiment of the present invention.
  • Fig. 7 is a front sectional view of a sixth embodiment of the present invention.
  • Fig. 8 is a front sectional view of a seventh embodiment of the present invention.
  • Fig. 9 is a front sectional view of an eighth embodiment of the present invention.
  • Fig. 10 is a sectional view of a seal member according to a ninth embodiment of the present invention.
  • Fig. 11 is a sectional view of a seal ring according to a tenth embodiment of the present invention.
  • Fig. 12 is a front sectional view of a seal member according to an eleventh embodiment of the present invention.
  • Fig. 13 is a front sectional view of a twelfth embodiment of the present invention.
  • Reducer clutch 18a Dewatering shaft 18b. Wave shaft
  • Sealing ring 20a Outer sealing lip 20b. Inner sealing lip 20c. Floating body 20d Connecting body 20e. Outer sealing surface 20f. Inner sealing surface
  • the water-saving automatic washing machine floating body sealing device shown in FIG. 2 is the first embodiment of the present invention.
  • the seal shown in the figure is in two states.
  • the left seal is in a separated state (dehydrated or waterless state in the inner barrel), and the right is in a combined state.
  • the seal ring 20 closes the gap between the seal cover 11 and the tray 5. (Washed or stored in an inner bucket).
  • the sealing device includes a sealing cover 11 fixed on the inner side of the bottom of the outer tub 1, a tray 5 fixed on the bottom of the inner tub 2, and The drainage chamber 16 surrounded by the bucket 1 and the sealing cover 11 and the tray 5, and the sealing ring 20 for closing the gap between the sealing cover 11 and the tray 5.
  • the tray 5 can rotate with the inner bucket 2, that is, Move relative to the seal cover 1 1; the seal cover seal surface 11 a provided on the inner surface of the upper edge of the seal cover 1 1 and the tray seal surface 5 a on the outer edge of the bottom surface of the tray 5 and the outer seal surface 20 e and the inner seal surface of the upper surface of the seal ring 20 20f is a sealing surface, and they are combined to form a seal between the sealing cover 11 and the tray 5; the sealing cover sealing surface 11a is located on the same horizontal surface as the tray sealing surface 5a.
  • the main body of the seal ring 20 is a floating body 20c made of rubber. The buoyancy generated in the water is sufficient to float itself.
  • the upper surface as the sealing surface is flat and the outer sealing surface 20e and the inner sealing surface 20f are provided on the ring.
  • the inside diameter is slightly larger than the ring-shaped maximum diameter of the drainage holes 7 arranged annularly at the bottom of the inner bucket 2.
  • the outside diameter is larger than the inside diameter of the sealing cover sealing surface 1 1 a and smaller than the inside diameter of the upper ring lib of the sealing cover.
  • the sealing ring 20 is sleeved outside the dewatering shaft 18 a and can float upward along the dewatering shaft 18 a to close the gap between the sealing cover 11 and the tray 5.
  • the inner tub 2 When the washing process of the washing machine starts, the inner tub 2 is filled with water, and the water is injected into the drainage cavity 16 through the drainage hole 7. As the water level in the drainage cavity 16 rises, the seal ring 20 rises under the buoyancy of the floating body 20c, and reaches a certain water level. The outer sealing surface 20e and the inner sealing surface 20f of the upper surface of the seal ring 20 are in contact with the sealing cover sealing surface 1a and the tray sealing surface 5a, respectively. As the water level further rises, the inner bucket 2 is also filled with water, and the water pressure further increases. The water pressure acts on the seal ring 20 and the pressure on the sealing surface further increases, so that the seal between the seal cover 1 1 and the tray 5 can be increased. The gap is tightly closed, that is, the water passage between the inner bucket 2 and the outer bucket 1 is closed, as shown in the seal ring 20 on the right side of FIG. 2.
  • the drain valve 14 When the dehydration process starts, the drain valve 14 is opened, and the water is discharged through the drain hole 7, the drain chamber 16, the main drain port 15, the main drain pipe 13, the drain valve 14, and the drain pipe 21, and as the water level in the drain chamber 16 drops
  • the sealing ring 20 descends under the effect of its own gravity.
  • the sealing ring 20 descends to the bottom of the outer tub 1.
  • the sealing ring 20 is completely separated from the sealing cover sealing surface 11a and the tray sealing surface 5a.
  • a discontinuous rib lb is provided on the inner surface of the bottom of the outer tub 1. When the water level in the drainage chamber 16 drops, the rib lb supports the sealing ring 20 to allow the water to drain away smoothly.
  • the water-saving type full-automatic washing machine floating body sealing device shown in FIG. 3 is the second embodiment of the present invention.
  • the difference from the first embodiment is that the sealing ring 20 also has a ring-shaped outer sealing lip 20a and an inner sealing lip 20b.
  • Two sealing lips, which form a "Y" shape, are located on the upper end surface of the seal ring floating body 20c.
  • the floating body 20c is a hollow closed structure, and the buoyancy generated in the water can float the entire sealing ring 20; the outer diameter of the outer edge of the outer sealing lip 20a is greater than the inner diameter of the sealing cover sealing surface 1 1 a and smaller than the inner diameter of the upper ring lib of the sealing cover, The inner diameter of the inner sealing lip 20b is larger than the annular maximum diameter of the annularly arranged drainage holes 7.
  • the floating body 20c in this embodiment is separated from the annular inner sealing lip 20b and the outer sealing lip 20a above into two independent parts, which can achieve the same technical effect, and it is easier to produce a sealing ring with this separation structure. Realization is conducive to reducing costs.
  • the sealing ring shown in FIG. 4 is the third embodiment of the present invention.
  • the floating body 20c of the sealing ring 20 is a ring-shaped hollow cavity structure, and its cross section is “ ⁇ ”, the bottom surface is open, and the floating body “ ⁇ ”
  • the two corners of the upper part of the figure are connected to the outer sealing lip 20a and the inner sealing lip 20b, respectively.
  • the buoyancy of the floating body 20c in water is sufficient to float the entire seal ring 20 in the water.
  • the sealing ring shown in FIG. 5 is the fourth embodiment of the present invention.
  • Its floating body 20c is a ring-shaped open cavity structure. Its cross section is circular and the bottom is open.
  • the upper part of the floating body 20c is connected to the outer sealing lip 20a, the inner
  • the sealing lip 20b, the two sealing lip form a certain angle with the horizontal line, forming an inverted sigma shape, that is, a "Ya" shape.
  • the buoyancy of the floating body 20c in the water is sufficient to float the entire sealing ring 20 in the water.
  • the sealing ring shown in FIG. 6 is a fifth embodiment of the present invention.
  • the floating body 20c of the sealing ring 20 is a ring-shaped hollow closed structure.
  • the cavity is filled with foaming material.
  • the sheet-shaped outer sealing lip 20a Formed in a "Y" shape with the inner sealing lip 20b is located on the upper end surface of the floating body 20c of the sealing ring 20, and is integrated with the floating body 20c.
  • the water-saving automatic washing machine floating body sealing device shown in FIG. 7 is the sixth embodiment of the present invention.
  • the difference from the second embodiment is the outer sealing lip 20a of the sealing ring 20 and the upper ring of the sealing cover. Fixed and closed connection.
  • the length of the connecting body 20d is sufficient to make the floating ring 20c of the seal ring float up.
  • the inner sealing lip 20b and the sealing surface 5a of the tray are in close contact to form a seal.
  • the floating body 20c is lowered, the inner sealing lip 20b is separated from the tray sealing surface 5a by the self-weight of the sealing ring 20.
  • the sealing ring floating body 20c drives the inner sealing lip 20b to rise, and the connecting body 20d is fixed.
  • the end floating body 20c is pulled and inclined upward, so that the inner part of the central seal
  • the lip 20b leans against the sealing surface 5 a of the tray.
  • the floating inner sealing lip 20 b will press the sealing surface 5 a of the tray under the action of the buoyancy and water pressure of the floating body 20 c to achieve the seal between the inner bucket 2 and the outer bucket 1. , As shown in the sealing ring 20 on the right side of FIG. 7.
  • the inner sealing lip 20b and the floating body 20c drop under the action of its own gravity, and the seal is detached as shown in the sealing ring 20 on the left side of FIG. 7.
  • the outer seal lip 20a is fixed, and the inner seal lip 20b is moved upward to fix a seal lip and a sealing surface.
  • the seal will be more reliable, and the problem of axial installation errors can also be solved.
  • the floating body 20c in this embodiment is separated from the annular inner and outer sealing lips and the connecting body (20d) above it into two independent parts, which can achieve the same technical effect, and the seal ring of this separated structure is in production. It is easier to implement and is beneficial to reducing costs.
  • the water-saving automatic washing machine floating body sealing device shown in FIG. 8 is the seventh embodiment of the present invention.
  • the difference from the sixth embodiment is that the floating body 20c of the sealing ring 20 is a hollow closed structure, and the cross-sectional shape is as shown in FIG.
  • the inner sealing lip 20b is fixed between the bottom surface of the tray 5 and the flange of the reducer 18 at the same time as a circular or other geometric shape.
  • the inner sealing lip 20b is provided with a drainage hole 7 Corresponding hole position and positioning design to keep the drainage channel of inner bucket 2 unobstructed; inner sealing lip 20b has a corrugated tubular connecting body 20d, which has a telescopic length sufficient for the floating body 20c of the sealing ring 20 to float when the outer sealing lip 20a and the sealing cover sealing surface 1 1 a tightly contacts to form a seal. When the floating body 20 c is lowered, the lip seal 20 a is separated from the sealing cover sealing surface 11 a.
  • the water level in the drainage chamber 16 rises, and the floating body 20c drives the outer sealing lip 20a to rise, and the sealing cover is pressed tightly by the buoyancy and water pressure of the floating body 20c.
  • the sealing surface 11a realizes the sealing between the inner tub 2 and the outer tub 1, as shown by the sealing ring 20 on the right side of FIG.
  • the drain valve 14 is opened, and as the water level in the drain chamber 16 drops, the seal ring 20 drops under its own gravity, and the seal is detached, as shown in the seal ring 20 on the left side of FIG.
  • the inner bucket 2 rotates at high speed.
  • the centrifugal force will not cause the seal ring 20 to collide or rub against the seal cover 1 1.
  • the inner sealing lip 20b is fixed and the outer sealing lip 20a is moved axially.
  • the production of the seal ring 20 is relatively simple and the cost is low.
  • the floating body 20c in this embodiment is separated from the annular inner and outer sealing lips and the connecting body (20d) above it into two independent parts, which can achieve the same technical effect, and the seal ring of this separated structure is in production. It is easier to implement and is beneficial to reducing costs.
  • the water-saving automatic washing machine floating body sealing device shown in FIG. 9 is the eighth embodiment of the present invention.
  • the difference from the sixth embodiment is that the foregoing sealing device is further simplified: the sixth embodiment is directly described in the sixth embodiment.
  • the outer sealing lip 20a of the sealing ring 20 is directly fixed and sealed at the inner side of the bottom of the washing tub 1.
  • the annular skirt and the inner side of the bottom of the washing tub 1 form the aforementioned drainage cavity 16, thereby eliminating the independent sealing
  • the cover 11 achieves the purpose of simplifying the assembly process and reducing the product cost.
  • the inner sealing surface 20f of the seal ring 20 and the tray sealing surface 5a form a seal to seal the water passage between the inner tub 2 and the outer tub 1.
  • the sealing ring 20 When the sealing ring 20 rises to a certain water level under the buoyancy of the floating body 20c, the inner sealing surface 20f of the sealing ring 20 contacts the tray sealing surface 5a. When the inner bucket 2 is filled with water, the water pressure acts on the floating body 20c and the inner sealing surface 20f, so that the inner sealing surface 20f is pressed against the tray sealing surface 5a, thereby closing the water passage between the inner bucket 2 and the outer bucket 1, as shown on the right side of FIG. 9 Sealing ring 20 is shown. When the water in the drainage chamber 16 is drained, the sealing ring 20 is lowered to the bottom of the outer tub 1, and the inner sealing surface 20f is completely separated from the sealing surface 5a of the tray, as shown by the sealing ring 20 on the left side of FIG.
  • the water-saving automatic washing machine floating body sealing device shown in FIG. 10 is a ninth embodiment of the present invention.
  • the sealing cover sealing surface 1 1 a and the tray sealing surface 5 a are respectively set as tapered surfaces, and the cross section of the floating body 20 c of the seal ring 20 is circular. It has good pressure change and elasticity, which can ensure the reliability of the seal. .
  • the sealing ring shown in FIG. 11 is a tenth embodiment of the present invention.
  • the sealing ring 20 in this embodiment has a ring-shaped hollow closed structure.
  • the outer cover 20e and the inner sealing surface 20f are not on the same horizontal plane.
  • the outer sealing surface 20e is lower than the inner sealing surface 20f.
  • the inner sealing surface 20f is provided with an annular protrusion 22, and the sealing ring 20
  • the top ends of the annular protrusions 22 are in contact with the sealing cover sealing surface 11a and the tray sealing surface 5a, respectively, and close the gap between the sealing cover 11 and the tray 5.
  • the water-saving type full-automatic washing machine floating body sealing device shown in Fig. 12 is an eleventh embodiment of the present invention.
  • the sealing cover sealing surface 1 1 a and the tray sealing surface 5 a in this embodiment each have an annular protrusion 22.
  • the outer sealing surface of the sealing ring 20e and the inner sealing surface 20f are respectively in contact with the top ends of the above-mentioned annular protrusions 22, closing the gap between the sealing cover 11 and the tray 5.
  • the water-saving automatic washing machine floating body sealing device shown in FIG. 13 is the twelfth embodiment of the present invention.
  • the difference from the sixth embodiment is the outer sealing lip 20a of the sealing ring 20 and the upper ring of the sealing cover.
  • lib is a fixed and closed connection.
  • the outer sealing lip 20a has a retractable corrugated tubular connecting body 20d, and the extending length of the connecting body 20d is sufficient to make the inner ring lip 20b in close contact with the tray sealing surface 5a when the floating body 20c of the seal ring floats to form a seal
  • the inner sealing lip 20b is separated from the tray sealing surface 5a due to the self-weight of the seal ring 20 and the contraction of the corrugated tubular connecting body 20d of the outer sealing lip 20a.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Description

一种节水型全自动洗衣机浮体式密封装置 所属技术领域 本发明涉及一种洗衣机的密封装置, 尤其是涉及一种节水型全自 动洗衣机浮体式密封装置。 背景技术
在现有技术中, 节水型全自动洗衣机, 主要是指洗衣时洗衣机的外 桶不贮水, 仅内桶贮水进行洗涤的洗衣机, 这样的洗衣机比在洗衣时 内、 外桶同时充满水的全自动洗衣机可节省 20%~30%的洗涤用水。 这 种节水型全自动洗衣机参见中国发明专利 95 1 1 71 71 .2 《全自动洗衣机》 和实用新型专利 9723 1435.0 《节水型全自动洗衣机》 公开的内容, 其 结构特点是, 在外桶内部设置的内桶 (又称旋转桶、 脱水桶), 为中下 部侧壁无孔只有上部具有一横列由数孔形成的脱水用出水口和底部中 央具有环状设置的排水孔的桶体, 为实现外桶不贮水, 内桶的排水通 道必须与外桶隔离, 即外桶与内桶之间还设有密封装置。
对于上述的密封装置, 中国实用新型专利 96228625.7 《洗衣机的 内外桶间的密封装置》 和 0121 8004. 1 《节水全自动洗衣机的盛水桶》 有更为详细的披露。 如图 1所示, 设置在外桶 1 内的内桶 2 (即上文所 述的旋转桶) 通过托盘 5 (又称法兰盘) 和旋转挡圈 6 (又称密封碗) 一起固定在脱水轴 1 8a上, 内桶 2 的排水通道包括其底部中央环状设 置的穿透托盘 5和旋转挡圈 6 的排水孔 7及在外桶 1 底部内侧设置的 台锥形的密封罩 1 1 (又称密封盒、 盖) 与外桶 1底面形成的排水腔 16, 该排水腔 1 6经主排水口 1 5连通主排水管 13、 排水阀 14和排水管 21。 对于所述的排水通道涉及的密封装置包括有对内桶 2 和托盘 5 之间、 旋转挡圈 6和托盘 5之间, 密封罩 1 1和外桶 1之间以及旋转挡圈 6和 密封罩上端中央所具有的容纳旋转挡圈 6的上端口之间的间隙的密封, 但实际上, 由于除了后者以外的其他间隙均为两个无相对运动的零件 连接而形成, 采用静态密封就能容易地满足密封要求, 因此, 密封装 置的真正关键是对于上述所列后者——旋转挡圈 6和密封罩上口圈 lib 之间的间隙的密封。 因为内桶 2相对于外桶 1 可以由脱水轴 18a带动 转动, 实现脱水动作, 旋转挡圈 6也会随内桶 2转动而转动, 因此, 旋转挡圈 6相对于密封罩 1 1是存在相对运动的, 即它们之间的密封是 一种轴类旋转密封结构。 如图 1所示, 旋转挡圈外柱面 6a与密封罩上 口圈 l ib之间的间隙由密封圈 10密封, 该密封圈 10 由位于内、 外侧 的筒形外缘及将两外缘联成一体的环形上缘构成, 在内缘的上、 下两 端分别具有向内倾斜延伸与旋转挡圈外柱面 6a过盈配合的上唇齿和下 唇齿。
洗衣时, 向内桶 2注水, 内桶依靠上述密封装置使水不会流到外桶
1, 同时, 在洗衣时由于排水阀 14关闭, 水只能贮存在内桶 2和排水 腔 16 内。 当脱水时, 排水阀 14打开, 内桶 2里的水通过所述的排水 通道排出, 接着, 内桶高速旋转, 含在衣物中的水在离心力的作用下 沿着内桶壁上升, 从上部脱水用出水口 (图中未示出) 甩出, 由外桶 1 收集, 然后经过副排水口 4、 副排水管 19接到排水管 21排出。
上述现有技术的不足之处在于: (1)按照现有技术这种常规的密封结 构, 即密封圈 10的唇齿始终抱紧会高速转动的旋转挡圈外柱面 6a, 当 内桶高速旋转时会产生磨损, 导致密封圈 10寿命短, 使密封失效, 因 为在洗衣机工作的过程中, 该密封付在两个程序中处在动态密封状态 中, 即洗涤和脱水程序。 洗涤程序: 内桶 2 转动的角度很小, 密封圈 10的唇齿和旋转挡圈外柱面 6a的相对运动很小,密封付可视为处于有 介质的静态密封中; 但在脱水程序中, 旋转挡圈外柱面 6a会随内桶 2 高速旋转, 转速可高达 800转 /分以上, 相对密封圈 10的唇齿的线速度 可达 4m/s 以上, 而此时由于排水腔 16 内的水已排干, 密封付处于无 介质的干摩擦状态, 且密封付又为过盈配合, 因此其间所产生的摩擦 力很大, 很容易造成旋转挡圈外柱面 6a与密封圈 10 的唇齿接触处的 磨损, 导致密封失效, 密封付的寿命降低。 (2)密封付在高速干摩擦中 极容易产生噪音。 (3)摩擦力大, 将大量消耗电机的功率, 严重时导致 脱水过程中电机将启动困难。 (4)在工艺上较难以保证密封性能: 因为 密封圈 10 的唇齿和旋转挡圈外柱面 6a应具有较好的同心度才能具有 良好的密封性能, 但由于其安装环节过多且复杂, 相关零件难免会有 制造误差, 特别是外桶 1和密封罩 1 1 为大型塑料件, 极容易产生变形, 很难保证它们有很好的同心度; 有时为了弥补安装误差, 可以加大密 封唇齿对旋转挡圈外柱面 6a的装配过盈量, 但这样一来, 会导致密封 付的摩擦力加大, 随之更会加剧前述 (1)〜(3)的种种问题。 (5)为了解决 动态密封的问题, 需要釆用耐磨、 耐腐蚀材料制造旋转挡圈 6, 且为了 降低密封付的磨损,旋转挡圈外柱面 6a还应具有较高的精度和光洁度, 这都会导致成本的增加, 而为了解决干摩擦所产生的噪音和提高寿命, 还须改进密封圈 1 0材料的成份, 这也将导致成本的增加。 循此技术方 案发展下去, 不但成本大大增加, 而且还难以取得理想的技术效果, 由此种种限制了该种节水型全自动洗衣机的发展。
发明内容
为了克服现有节水型全自动洗衣机旋转挡圈与密封罩上端口之间 的密封结构易于磨损失效的不足, 本发明提供一种节水型全自动洗衣 机浮体式密封装置, 这种密封装置能够合理地完成节水型全自动洗衣 机的密封要求, 密封可靠、 寿命长, 且制造安装容易、 成本低, 有利 于推动节水型全自动洗衣机的发展。
本发明解决其技术问题所釆用的技术方案是: 根据洗衣机实际只在 内桶贮水和洗涤的过程中才需要内桶与外桶隔离密封而脱水过程不需 要密封的特点, 改现有技术密封装置中密封圈的唇齿与旋转挡圈之间 的径向动态密封即轴类旋转密封为轴向平面或锥面密封, 采用可 浮动的密封圈, 利用水的浮力及水压, 实现内桶贮水和洗涤时, 使 密封圈上浮封闭密封罩与托盘之间的间隙并可靠地密封, 而在脱水时, 内桶的水被排出, 密封圈随水的下降而下降, 密封付分离, 避免了密 封圈与高速转动的零件的接触, 从而避免了密封付产生摩擦及随之产 生的一系列不良后果。
具体结构是: 该密封装置包括固定在外桶底部内侧的密封罩、 固定 在内桶底部的托盘及由外'桶与密封罩和托盘围成的排水腔, 以及用于 封闭密封罩与托盘之间的间隙的密封圈, 其特征在于: 密封圈是一个 套在脱水轴外、 可以沿脱水轴向上浮起将密封罩与托盘之间的间隙封 闭的环形浮体, 上浮的密封圈上表面与托盘底面及密封罩上缘的内面为 密封面, 上述密封面结合组成密封罩与托盘之间的密封付。
当洗衣机的洗衣程序开始时, 向内桶注水, 水经过内桶底部的排水 孔注入排水腔, 由于排水阀关闭, 水首先充入排水腔, 随着排水腔内 水位上升, 密封圈在浮体的浮力作用下向上升, 到一定高度时, 密封 圈的上表面与密封罩上缘内面和托盘底面的密封面接触, 随着水位的进 一步上升, 水压进一步加大, 水压作用在浮体上, 使密封圈的上表面压 紧在密封面上, 达到了封闭内外桶之间水的通道的目的。
当脱水程序开始时, 排水阀开启, 水通过排水孔, 排水腔、 排水管 和排水阀等排水通道排出, 随着排水腔内的水位下降, 密封圈在自身 重力的作用下下降, 当排水腔内的水排干时, 密封圈的上表面与密封 罩上缘内面、 托盘底面的密封面完全脱离, 密封圈下降并由洗衣桶底 部内侧的不连续凸筋支承让水顺利排走, 此时内桶高速旋转, 含在衣 物中的水在离心力的作用下沿着内桶壁上升, 从上部脱水用出水口(图 中未示出) 甩出, 由外桶 1 收集然后经过付排水口 4、 付排水管 1 9接 到排水管 21排出, 因此排水腔不会有水, 密封圈不会浮起, 密封圈也 就不会与任何运动件接触, 因此不存在磨损和噪音的问题。
本发明所述的密封圈上表面具有两个密封面, 它们分别为外密封面 和内密封面, 在密封圈的外密封面上方的密封罩与之对应处设置密封罩 密封面, 在内密封面上方托盘底部与之对应处设置托盘密封面, 上浮的 密封圈的外、 内密封面分别与密封罩密封面和托盘密封面接触, 封闭密 封罩与托盘之间的间隙。
本发明所述的密封罩密封面与托盘密封面水平设置在密封圈外、 内 密封面对应上方并且在同一水平面上; 或者密封罩密封面与托盘密封 面的高度位置也可以错开, 但需密封圈的外、 内密封面也对应错开相 应髙度。
本发明所述的密封罩上缘内面与托盘底面的密封面还可以设置成 锥面。 '
上述的密封圈的外密封面的外缘外径大于密封罩密封面的内径,内 密封面的内缘内径应大于或等于内桶底部环形排布的排水孔的环形最 大直径及托盘密封面内缘的内径, 密封时, 密封圈外、 内密封面压紧 在密封罩密封面和托盘密封面上, 封闭密封罩和托盘之间的间隙, 达 到封闭内外桶之间水的通道的目的。
本发明所述的密封罩密封面和托盘密封面为光滑表面,密封圈的外、 内密封面也为光滑表面。 这样, 当密封圈的外、 内密封面与密封罩密 封面和托盘密封面形成密封付时, 密封将更加可靠。 本发明可以作进 一步的改进: 所述的密封圈在外、 内密封面处还可以具有 1个或多于 1 个的环形凸起, 它位于浮体的上方构成密封圈的外、 内密封面。 密封 圈上的环形凸起顶端分别与密封罩密封面与托盘密封面接触, 封闭密 封罩与托盘之间的间隙。
本发明可以作进一步的改进: 所述的密封装置, 还可以是所述的密 封罩密封面及托盘密封面上还分别具有环形凸起, 该环形凸起顶端位 于同一平面上, 上浮的密封圈外、 内密封面与密封罩密封面的环形凸 起 (顶端) 及托盘密封面上的环形凸起 (顶端) 为密封面。 上述环形 凸起顶端位也可以高度位置错开, 密封圈的外、 内密封面的高度也对 应错开。 上浮的密封圈的外、 内密封面分别与密封罩密封面上的环形 凸起和托盘密封面上的环形凸起接触, 封闭密封罩与托盘之间的间隙。 本发明可以作进一步的改进: 所述的密封圈具有两个密封唇, 它们 分别为外密封唇和内密封唇, 环形的外、 内密封唇均位于密封圈浮体 的上部构成密封圈的密封面, 在外密封唇上方的密封罩与之对应处设 置有密封罩密封面, 在内密封唇上方托盘底部与之对应处设置托盘密 封面。 釆用这种环形片状密封唇结构可以提高压变性增加密封的可靠 性。
所述的外密封唇的外缘外径大于密封罩的上缘端口内径, 内密封唇 的内缘内径大于或等于内桶底部环形排布的排水孔的环形最大直径。 上浮的密封圈的外密封唇和内密封唇分别与密封罩密封面和托盘密封 面接触, 封闭密封罩与托盘之间的间隙。 如果所述的密封罩密封面与 托盘密封面高度位置错开, 密封圈的外、 内密封唇的高度也对应错开, 使上浮的密封圈的外密封唇和内密封唇仍分别与密封罩密封面和托盘 密封面接触, 封闭密封罩与托盘之间的间隙。
本发明还可以作以下的改进: 所述的密封圈具有外密封唇和内密封 唇, 在内密封唇上方托盘底部与之对应处水平设置托盘密封面, 所述 的密封圈的外密封唇具有一环形裙边, 该裙边与密封罩的上缘固定封 闭连接。 外密封唇具有连接 ·体, 该连接体有足够的长度使密封圈的浮 体上浮时内密封唇与托盘密封面紧密接触形成密封付; 在洗衣机脱水 时, 排水腔内水位下降, 浮体下降, 内密封唇与托盘密封面分离。 所 述的连接体可以制成可伸缩的连接体, 如波紋管状, 这样一来, 浮体 的升降更加顺畅。 所述的密封圈浮体还可以与外密封唇、 内密封唇和 连接体所构成的密封圈零件分体。
本发明还可以作以下的改进:所述的密封圈具有外密封唇和内密封 唇, 在内密封唇上方托盘底部与之对应处水平设置托盘密封面, 将前 述的密封圈的外密封唇的环形裙边直接固定并密封在洗衣桶底部内 侧, 相当于将环形裙边与密封罩作成一体, 从而取消了独立的密封罩, 达到简化装配工艺和降低产品成本的目的。 外密封唇具有一连接体, 该连接体的长度足够使密封圈的浮体上浮时让内密封唇与托盘密封面 紧密接触形成密封付; 在洗衣机脱水时, 排水腔内水位下降, 浮体下 降, 内密封唇与托盘密封面分离。 所述的连接体可以制成可伸缩的连 接体, 如波紋管状, 这样一来, 浮体的升降更加顺畅。 所述的密封圈 浮体还可以与外密封唇、 内密封唇和连接体所构成的密封圈零件分体。
本发明还可以作以下的改进: 所述的密封圈具有外密封唇和内密封 唇, 在外密封唇上方密封罩与之对应处水平设置密封罩密封面, 所述 的密封圈的内密封唇与托盘密封面固定封闭连接; 内密封唇具有可伸 缩的连接体, 该可伸缩的连接体足够使密封圈的浮体上浮时外密封唇 与密封罩密封面紧密接触形成密封付; 在洗衣机脱水时, 排水腔内水 位下降, 浮体下降, 外密封唇与密封罩密封面分离。 所述的可伸缩的 连接体可以是可伸缩波紋状。
本发明所述的密封圈中的浮体截面可以是圆形、 矩形, 或者是其他 几何形状。 浮体可以是环形空心封闭结构, 也可以是环形开式空腔结 构, 在所述的密封圏浮体中间可以充填比重小于水的材料如发泡材料。 中间的填充材料可以增加密封圈整体刚性。 密封圈整体应能在水中浮 起。
当本发明所述的密封圈浮体为环形开式空腔结构时, 其上部密闭, 底面开口, 在浮体的作用下整个密封圈应能在水中浮起。
在本发明中, 密封圈最好由具有压变性好、 较高的机械强度和弹性 的橡胶或其它高分子材料等适合做密封圈并适合在洗涤液中工作的材 料制成。
本发明的另一个改进是: 所述的密封圈的外、 内密封面为在基材上 复合上一层压变性强、 弹性好、 机械强度高的材料, 例如比密封圈本 体材料更软的橡胶或其他高分子材料, 这样可大大节省密封圈的制造 成本。
本发明的另一个改进是: 所述的密封罩密封面和托盘密封面为在基 材上复合上一层压变性强、 弹性好、 机械强度高的材料, 例如比密封 圈材料更软的橡胶或其他高分子材料。
在本发明中, 如果密封罩密封面和托盘密封面复合了压变性强、弹 性好、 机械强度高的材料, 密封圈可以采用相对较硬的材料如塑料制 成, 从而可以降低成本和简化密封圈的加工工艺。
在本发明中, 所述的复合包括表面涂覆、 镶嵌、 粘合、 注塑成形等 多种形式。
本发明的有益效果是: (1)由于密封圈是可以浮动的, 它的密封面与 密封罩密封面和托盘密封面是平面接触, 密封压力由水压提供, 只要 接触面足够大且光滑, 密封就一定可靠, 如果进一步采用片状密封唇 结构, 压变性更好, 或者密封付中至少一方材料压变性、 弹性、 机械 强度很好, 密封效果会更好。 例如, 一般洗衣时内桶的水位高度约在 25〜50cm,则水压 0.25~0.5N/cm2,设密封件的内径为 8 cm,外径为 12cm , 则密封圏承受水压的面积约为 62.8 cm2, 承受的压力为 15.7N~3 1 .4N。 当接触面宽度为 2mm时, 密封付接触压力为 1 .25 2.5N/cm2, 为水压的 五倍。(2)由于轴向平面密封的同心度不象径向动态密封的要求那样高, 密封付的接触和脱离由水位控制, 因此本发明的密封装置制造和安装 就容易得多了, 成本也较低。 (3)由于避免了密封圈与高速转动的内桶 及其相关零件的接触, 从而从根本上解决了密封付产生摩擦以及随之 产 诸如噪声、 耗电多、 脱水启动阻力大等等一系列的问题。 (4)在本 发明中, 密封圈材料要求不高, 又取消了制造成本高的旋转挡圈 (甚 至密封罩), 因此, 整机制造成本会降低。 (5)日本的东芝、 夏普等洗衣 机制造商在二十世纪七、 八十年代就已开发出外桶在洗衣时不贮水的 节水型洗衣机 (如 JP昭 54- 12098、 JP昭 61 -9878 ), 国内的洗衣机制造 商也曾在二十世纪九十年代开发出同样的产品, 但由于外桶与内桶之 间的动态密封解决得不好, 一直未能大量推广。 采用本发明的密封装 置, 能较好地解决密封问题, 将有利于节水型全自动洗衣机的推广应 用。
附图说明:
下面将结合实施例和附图对本发明作进一步的详细描述:
图 1是现有技术节水型全自动洗衣机密封付结构主视剖面图。 图 2是本发明第 1个实施例的主视剖面图。
图 3是本发明第 2个实施例的主视剖面图。
图 4是本发明第 3个实施例的密封圈的截面图。
图 5是本发明第 4个实施例的密封圈的截面图。
图 6是本发明第 5个实施例的密封圈的截面图。
图 7是本发明第 6个实施例的主视剖面图。
图 8是本发明第 7个实施例的主视剖面图。
图 9是本发明第 8个实施例的主视剖面图。
图 10是本发明第 9个实施例的密封付的剖面图。
图 11 是本发明第 10个实施例的密封圈的截面图。
图 12是本发明第 11个实施例的密封付的主剖面图。
图 13是本发明第 12个实施例的主视剖面图。
图中: 1. 外桶, la. 外桶中央孔, lb. 凸筋
2. 内桶 3. 波轮 4. 付排水口
5. 托盘 5a. 托盘密封面
6. 旋转挡圈 6a. 旋转挡圈外柱面
7. 排水孔 8. 密封垫 9. 密封垫 10. 密封圈
11. 密封罩 11a.密封罩密封面 lib.密封罩上口圈
12. 密封垫 13. 主排水管 14. 排水阀 15. 主排水口 16. 排水腔 17. 密封圈
18. 减速离合器 18a. 脱水轴 18b. 波轮轴
19. 付排水管
20. 密封圈 20a.外密封唇 20b.内密封唇 20c.浮体 20d 连接体 20e. 外密封面 20f. 内密封面
21. 排水管 22. 环形凸起 .
具体实施方式:
图 2 所示的节水型全自动洗衣机浮体式密封装置是本发明的第一 个实施例。图中所示的密封付为两种状态,左边的密封付为分离状态(脱 水或内桶无水状态), 右边为密封付结合状态, 此时密封圈 20封闭密封 罩 11 与托盘 5 之间间隙 (洗涤或内桶贮水状态)。 该密封装置包括固 定在外桶 1底部内侧的密封罩 11、 固定在内桶 2底部的托盘 5及由外 桶 1 与密封罩 1 1 和托盘 5 围成的排水腔 16, 以及用于封闭密封罩 1 1 与托盘 5之间的间隙的密封圈 20, 其中, 托盘 5可以随内桶 2—起转 动, 即相对密封罩 1 1 运动; 设置在密封罩 1 1 的上缘内面的密封罩密 封面 11 a与托盘 5底面外缘的托盘密封面 5a和密封圈 20的上表面的外 密封面 20e、 内密封面 20f 为密封面, 它们结合组成密封罩 1 1与托盘 5 之间的密封付; 密封罩密封面 1 1 a与托盘密封面 5a位于同一水平面 上。 密封圈 20主体是一个由橡胶制成的浮体 20c, 它在水中产生的浮 力足以使自身浮起, 其作为密封面的上表面为平面且上面设置外密封面 20e和内密封面 20f,该环形浮体的内径略大于内桶 2底部环形排布的排 水孔 7的环形最大直径, 外径大于密封罩密封面 1 1 a的内径小于密封罩 上口圈 l i b 的内径。 密封圈 20套在脱水轴 18a外、 可以沿脱水轴 18a 向上浮起将密封罩 1 1与托盘 5之间的间隙封闭。
当洗衣机的洗衣程序开始时, 向内桶 2 注水, 水经过排水孔 7 注 入排水腔 16, 随着排水腔 16 内水位上升, 密封圈 20在浮体 20c浮力 作用下向上升,到一定水位,上浮的密封圈 20的上表面的外密封面 20e 和内密封面 20f分别接触到密封罩密封面 1 1 a和托盘密封面 5a。随着水 位进一步上升, 内桶 2 也充满水, 水压进一步加大, 水压作用在密封 圈 20 上, 对密封面的压力也进一步加大, 从而可以将密封罩 1 1 与托 盘 5 之间的间隙紧紧地封闭了, 即封闭了内桶 2 与外桶 1 之间水的通 道, 如图 2右边的密封圈 20所示。
当脱水程序开始时, 排水阀 14开启, 水通过排水孔 7、 排水腔 16、 主排水口 1 5、 主排水管 13、 排水阀 14、 排水管 21 排出, 随着排水腔 16 内的水位下降, 密封圈 20 在自身重力的作用下向下降, 当排水腔 16 内的水排干时, 密封圈 20下降到外桶 1底部。. 密封圈 20完全脱离 了密封罩密封面 1 1 a和托盘密封面 5a, 在本发明中, 在外桶 1 底部内 表面设置不连续凸筋 l b, 当排水腔 16 内水位下降时, 此凸筋 l b承托 起密封圈 20, 让水顺利排走。 内桶 2高速旋转脱水时, 衣物中的水在 离心力的作用下沿着内桶 1 的内壁上升, 从上部脱水出水口 (图中未 示出) 甩出, 由外桶 1 收集后经付排水口 4、 付排水管 19接到排水管 21 排出, 此时排水腔 16 中始终处于无水状态, 密封圈 20不会升起, 也不会与任何运动部件接触, 因此不会产生磨损和噪音问题。 如图 2 左边的密封圈 20所示。
图 3 所示的节水型全自动洗衣机浮体式密封装置是本发明的第二 个实施例, 与实施例一不同的是密封圈 20还具有环形片状的外密封唇 20a和内密封唇 20b两个密封唇, 它们形成 "丫 " 字形位于密封圈浮体 20c的上端面。 浮体 20c为空心封闭结构, 在水中产生的浮力能浮起整 个密封圈 20 ; 外密封唇 20a的外缘外径大于密封罩密封面 1 1 a的内径 并小于密封罩上口圈 l i b 的内径, 内密封唇 20b 的内径大于环形排布 的排水孔 7之环形最大直径。 当密封圈 20在浮体 20c浮力作用下向上 升到一定高度时, 密封圈 20的外密封唇 20a和内密封唇 20b分别接触 密封罩密封面 1 1 a和托盘密封面 5a, 随着水位进一步上升, 水压进一 步加大, 水压作用在密封圈 20上, 使外密封唇 20a和内密封唇 20b分 别紧紧地压在密封罩密封面 1 1 a和托盘密封面 5a上,将密封罩 11 与托 盘 5之间的间隙封闭, 如图 3右边的密封圈 20所示。
在洗衣机脱水程序中, 内桶中的水被排空, 密封圈 20在自身重力的 作用下落至外桶 1底部, 使其外密封唇 20a、 内密封唇 20b完全脱离了 密封罩密封面 1 1 a和托盘密封面 5a, 不会与任何运动部件接触, 因此 不会产生磨损和噪音问题。 如图 3左边的密封圈 20所示。
另外, 本实施例中的浮体 20c与其上方的环形内密封唇 20b、 外密 封唇 20a 分离为两个独立的部分, 可以达到同样的技术效果, 而这种 分离结构的密封圈在生产上更容易实现, 有利于降低成本。
图 4所示的密封圈是本发明的第三个实施例, 所述的密封圈 20的 浮体 20c 为环形幵式空腔结构, 其截面为 " Π " 字形, 底面开口, 在 浮体 " Π "字形上部的两个角处分别连接外密封唇 20a、 内密封唇 20b。 浮体 20c在水中产生的浮力足以在水中浮起整个密封圈 20。
图 5所示的密封圈是本发明的第四个实施例, 它的浮体 20c为环形 开式空腔结构, 其截面为圆形, 底部开口, 在浮体 20c 上部分别连接 外密封唇 20a、 内密封唇 20b, 两密封唇与水平线形成一定的角度, 成 倒八字形, 即为 "丫 " 字形。 浮体 20c 在水中产生的浮力足以在水中 浮起整个密封圈 20。
图 6所示的密封圈是本发明的第五个实施例, 密封圈 20的浮体 20c 为环形空心封闭结构, 空腔内充填有发泡材料, 片状的外密封唇 20a 和内密封唇 20b形成 "丫 " 字形位于密封圈 20浮体 20c的上端面, 与 浮体 20c联为一体。
图 7所示的节水型全自动洗衣机浮体式密封装置是本发明的第六 个实施例, 与实施例二不同的是所述的密封圈 20的外密封唇 20a与密 封罩上口圈 l i b固定封闭连接,外密封唇 20a与浮体 20c之间有连接体 20d, 该连接体 20d 的长度足够使密封圈的浮体 20c 上浮时内密封唇 20b与托盘密封面 5 a紧密接触形成密封付, 当浮体 20c下降时, 在密 封圈 20的自重作用下, 内密封唇 20b与托盘密封面 5a分离。
当洗衣机的洗衣程序开始时, 排水腔 1 6内水位上升, 密封圈浮体 20c带动内密封唇 20b上升, 连接体 20d受到固定.端浮体 20c的牵拉推 动而向上倾斜, 使中心部位的内密封唇 20b靠向托盘密封面 5 a, 到一 定水位, 上浮的内密封唇 20b会在浮体 20c 浮力和水压的作用下压紧 托盘密封面 5 a, 实现内桶 2和外桶 1 之间的密封, 如图 7右边的密封 圈 20所示。 在脱水的过程中, 随着排水腔 16 内的水位下降, 内密封唇 20b和浮体 20c在自身重力的作用下下降, 密封付脱离如图 7左边的密 封圈 20所示。 在本实施例中, 釆用外密封唇 20a固定, 内密封唇 20b 向上运动的方式, 固定了一个密封唇和密封面, 密封将更可靠, 还可 以解决轴向安装误差的问题。 另外, 本实施例中的浮体 20c 与其上方 的环形内、 外密封唇和连接体 (20d ) 分离为两个独立的部分, 可以达 到同样的技术效果, 而这种分离结构的密封圈在生产上更容易实现, 有利于降低成本。
图 8所示的节水型全自动洗衣机浮体式密封装置是本发明的第七个 实施例, 与实施例六不同的是所述的密封圈 20的浮体 20c为空心封闭 结构, 截面形状为图示的圆形或其他几何形状, 内密封唇 20b 固定在 托盘 5底面和减速器 1 8的法兰上面之间并同时起密封作用, 在所述的 内密封唇 20b上对应排水孔 7开有相应的孔位和定位设计以保持内桶 2 排水道通畅; 内密封唇 20b具有波纹管状连接体 20d, 它伸缩的长度足 够使密封圈 20的浮体 20c上浮时外密封唇 20a与密封罩密封面 1 1 a紧密接 触形成密封付,· 当浮体 20c下降时,夕嘧封唇 20a与密封罩密封面 11a分离。
当洗衣机的洗衣程序开始时, 排水腔 16 内水位上升, 浮体 20c带 动外密封唇 20a上升,并在浮体 20c的浮力和水压的作用下压紧密封罩 密封面 l l a, 实现内桶 2和外桶 1之间的密封, 如图 8右边的密封圈 20 所示。 在脱水过程中, 排水阀 14开启, 随着排水腔 16 内的水位下降, 密封圈 20在自身重力作用下下降, 密封付脱离, 如图 8左边的密封圈 20所示, 即使密封圈 20随内桶 2—起高速旋转, 只要设计得当, 离心 力也不会导致密封圈 20碰撞或摩擦到密封罩 1 1。 在本实施例中, 采用 内密封唇 20b固定、 外密封唇 20a轴向运动的方式。 密封圈 20的制作 比较简单、 成本低。
另外, 本实施例中的浮体 20c 与其上方的环形内、 外密封唇和连 接体 (20d ) 分离为两个独立的部分, 可以达到同样的技术效果, 而这 种分离结构的密封圈在生产上更容易实现, 有利于降低成本。
图 9所示的节水型全自动洗衣机浮体式密封装置是本发明的第八个 实施例, 与实施例六不同的是对其前述的密封装置做进一步简化: 直 接将实施例六中所述的密封圈 20的外密封唇 20a..下部的环形裙边直接 固定并密封在洗衣桶 1 底部内侧, 环形裙边和洗衣桶 1 底部内侧构成 了前述的排水腔 16, 从而取消了独立的密封罩 11, 达到简化装配工艺 和降低产品成本的目的。 在本实施例中, 密封圈 20的内密封面 20f 与 托盘密封面 5a形成密封付, 封闭内桶 2与外桶 1之间水的通道。
当密封圈 20在浮体 20c浮力作用下向上升到一定水位时, 密封圈 20的内密封面 20f 接触托盘密封面 5a。 当内桶 2充满水, 水压作用在 浮体 20c和内密封面 20f上, 使内密封面 20f压紧在托盘密封面 5a上, 从而封闭内桶 2与外桶 1之间水的通道,如图 9右边的密封圈 20所示。 当排水腔 16 内的水排干时, 密封圈 20下降到外桶 1 底部, 内密封面 20f完全脱离了托盘密封面 5a, 如图 9左边的密封圈 20所示。
图 10 所示的节水型全自动洗衣机浮体式密封装置是本发明的第九 个实施例。 与上述实施例不同的是, 密封罩密封面 1 1 a 与托盘密封面 5a分别设置为锥面, 密封圈 20的浮体 20c截面为圆形具有良好的压变 性和弹性可以保证密封付的可靠性。
图 1 1所示的密封圈是本发明的第十个实施例。与上述实施例不同的 是, 本实施例中的密封圈 20具有环形空心封闭结构, 夕隨封面 20e、 内 密封面 20f 不在同一水平面上, 外密封面 20e低于内密封面 20f, 在其 外密封面 20e、 内密封面 20f上均具有 1个环形凸起 22, 密封圈 20上的 环形凸起 22顶端分别与密封罩密封面 1 1 a与托盘密封面 5a接触, 封闭密 封罩 1 1 与托盘 5之间的间隙。
图 12所示的节水型全自动洗衣机浮体式密封装置是本发明的第十 一个实施例。 与上述实施例不同的是, 本实施例中的密封罩密封面 1 1 a 与托盘密封面 5a均具有 1 个环形凸起 22, 当密封圈 20 向上浮起一定 高度时, 密封圈外密封面 20e、 内密封面 20f分别 ¾上述的环形凸起 22 顶端接触, 封闭密封罩 1 1与托盘 5之间的间隙。
图 13所示的节水型全自动洗衣机浮体式密封装置是本发明的第十 二个实施例, 与实施例六不同的是所述的密封圈 20的外密封唇 20a与 密封罩上口圈 l i b固定封闭连接,该外密封唇 20a具有可伸缩的波纹管 状连接体 20d, 该连接体 20d的伸展长度足够使密封圈的浮体 20c上浮 时内密封唇 20b与托盘密封面 5a紧密接触形成密封付, 当浮体 20c下 降时, 在密封圈 20的自重和外密封唇 20a的波紋管状连接体 20d收缩 的作用下, 内密封唇 20b与托盘密封面 5a分离。
当洗衣机的洗衣程序开始时, 排水腔 16 内水位上升, 密封圈 20 浮体 20c带动内密封唇 20b上升, 波纹管状连接体 20d随之向上伸展。 内密封唇 20b在浮体 20c浮力和水压的作用下压紧托盘密封面 5 a, 实 现内桶 2和外桶 1 之间的密封, 如图 7右边的密封圈 20所示。 在脱水 的过程中, 随着排水腔 1 6内的水位下降, 内密封唇 20b和浮体 20c在 自身重力作用和外密封唇 20a 的波紋管状连接体 20d 收缩的作用下下 降, 密封付脱离如图 7左边的密封圈 20所示。 在本实施例中, 采用外 密封唇 20a固定, 内密封唇 20b向上运动的方式, 固定了一个密封唇和 密封面, 密封将更可靠, 还可以解决轴向安装误差的问题。

Claims

权利 要 求
1.一种节水型全自动洗衣机浮体式密封装置, 包括固定在外桶 (1)底部内侧的密封罩(Π)、固定在内桶(2)底部的托盘(5)及由外桶(1) 与密封罩(11)和托盘(5)围成的排水腔(16),以及用于封闭密封罩(11) 与托盘(5)之间的间隙的密封圈(20), 其特征在于: 密封圈(20)是一 个套在脱水轴(18a)外、 可以沿脱水轴(18a)向上浮起将密封罩(11) 与托盘(5)之间的间隙封闭的环形浮体(20c),上浮的密封圈(20)上表 面与托盘(5)底面及密封罩(11)上缘的内面为密封面, 上述密封面结 合组成密封罩(11)与托盘(5)之间的密封付。
2.根据权利要求 1所述的节水型全自动洗衣机浮体式密封装 置, 其特征在于: 密封圏(20)上表面具有两个密封面它们分别为外 密封面(20e)和内密封面(20f),在密封圈(20)的外密封面(20e)上方的 密封罩(11)与之对应处设置密封罩密封面(11a), 在内密封面(20f;>上 方托盘(5)底部与之对应处设置托盘密封面(5a), 上浮的密封圈(20) 的外密封面(20e;)、 内密封面(20f)分别与密封罩密封面(1 la)和托盘 密封面(5a)接触, 封闭密封罩(I 1;)与托盘(5)之间的间隙。
3.根据权利要求 2所述的节水型全自动洗衣机浮体式密封装 置, 其特征是所述的密封罩密封面(11a)与托盘密封面(5a)都是水平 设置在密封圈外密封面(20e)、内密封面(20f)对应上方并且在同一水 平面上。 . '
4.根据权利要求 2所述的节水型全自动洗衣机浮体式密封装 置, 其特征是所述的密封罩密封面(11a)与托盘密封面(5a)都是水平 设置在密封圈(20)外密封面(20e)、 内密封面(20f)对应上方并且高度 位置错开, 密封圈(20)的外密封面(20e)、 内密封面(20f)的高度位置 也对应错开。
5.根据权利要求 1所述的节水型全自动洗衣机浮体式密封装 置, 其特征是所述的密封罩 (11) 上缘的内面及托盘 (5) 底面为 锥面。-
6.根据权利要求 2所述的节水型全自动洗衣机浮体式密封装 置, 其特征是所述的密封圈 (20) 具有至少 2个或 2个以上的环形 凸起, 它位于浮体(20c)的上方构成密封圈(20)的外密封面(20e)、 内密封面(20f),密封圈(20)上的环形凸起分别与密封罩密封面(11a) 及托盘密封面(5a)接触, 封闭密封罩 (11) 与托盘 (5)之间的间隙。
7.根据权利要求 1或 2或 3或 4或 5所述的节水型全自动 ί先衣 机浮体式密封装置,其特征是所述的密封罩密封面(11a)及托盘密封 面(5a)上还分别具有环形凸起 所述的环形凸起顶端位于同 ~ 面上。
8.根据权利要求 1或 2或 3或 4或 5所述的节水型全自动洗衣 机浮体式密封装置,其特征是所述的密封罩密封面(11a)及托盘密封 面(5a)上还分别具有环形凸起, 所述的环形凸起顶端位的高度位置 错开, 密封圈 (20) 的外密封面(20e)、 内密封面(20f)的高度也对应 错开。
9.根据权利要求 1所述的节水型全自动洗衣机浮体式密封装 置, 其特征是所述的密封圈 (20) 具有两个密封唇, 它们分别为外 密封唇 (20a) 和内密封唇 (20b), 环形的外密封唇(20a)、 内密封 唇 (20b) 均位于密封圈 (20) 浮体 (20c) 的上部构成密封圈 (20) 的密封面, 在外密封唇 (20a) 上方的密封罩 ( 11) 与之对应处设 置有密封罩密封面(lla), 在内密封唇 (20b) 上方托盘 (5) 底部与 之对应处设置托盘密封面(5a:)。
10. 根据权利要求 1所述的节水型全自动洗衣机浮体式密封装 置, 其特征是所述的密封圈 (20) 具有两个密封唇, 它们分别为外 密封唇 (20a) 和内密封唇 (20b), 在内密封唇 (20b) 上方托盘 (5) 底部与之对应处设置托盘密封面(5a),外密封唇(20a)与密封罩( 11) 上缘固定封闭连接, 外密封唇 (20a) 与浮体 (20c) 之间设有连接 体(20d), 该连接体(20d) 的长度足够使密封圈 (20) 的浮体(20c) 上浮时内密封唇 (20b) 与托盘密封面(5a)紧密接触形成密封付。
11. 根据权利要求 10所述的节水型全自动洗衣机浮体式密封 装置, 其特征是所述的密封圈浮体 (20c) 与其上方的环形内、 外 密封唇和连接体 (20d) 分离为两个独立体。
12. 根据权利要求 10所述的节水型全自动洗衣机浮体式密封 装置, 其特征是所述的连接体 (20d) 为可伸缩结构。
13. 根据权利要求 9所述的节水型全自动洗衣机浮体式密封装 置, 其特征是所述的密封圈 (20) 具有两个密封唇, 分别为外密封 唇(20a)和内密封唇(20b), 在外密封唇 (20a) 上方密封罩 ( 11) 与 之对应处设置密封罩密封面(lla), 内密封唇 (20b) 与托盘 (5) 固 定封闭连接; 内密封唇(20b)与浮体(20c)之间设有连接体(20d), 该连接体 (20d)足够使密封圈的浮体(20c)上浮时外密封唇(20a) 与密封罩密封面(11a)紧密接触形成密封付。
14. 根据权利要求 13所述的节水型全自动洗衣机浮体式密封 装置, 其特征是所述的密封圈浮体 (20c) 是密封圈的一个单独零 件, 与其上方的环形内、 外密封唇和连接体 (20d) 构成的密封圈 的另一个单独零件分体。
15. 根据权利要求 14所述的节水型全自动洗衣机浮体式密封 装置, 其特征是所述的连接体 (20d) 为可伸缩结构。
16. 根据权利要求 1或 2或 3或 4或 5或 6或 9或 10或 11 或 12或 13或 14或 15所述的节水型全自动洗衣机浮体式密封装置, 其特征是所述的密封圈 (20) 中的浮体 (20c) 为环形空心封闭结 构, 其截面为任意几何形状。
17. 根据权利要求 16所述的节水型全自动洗衣机浮体式密封 装置, 其特征是所述的密封圈 (20) 中的浮体 (20c) 充填有比重 小于水的材料。
18. 根据权利要求 1 或 2或 3或 4或 5或 6或 9或 10或 11 或 12或 13或 14或 15所述的节水型全自动洗衣机浮体式密封装置, 其特征是所述的密封圈 (20) 中的浮体 (20c) 为环形幵式空腔结 构, 其上部密闭, 下底面开口。
19. 根据权利要求 1或 2或 3或 4或 5或 6或 9或 10或 11 或 12或 13或 14或 15所述的节水型全自动洗衣机浮体式密封装置, 其特征是所述的密封圈 (20) 的密封面的表面复合一层压变性、 弹 性及机械强度好的材料。
20. 根据权利要求 1或 2或 3或 4或 5或 6或 7或 8或 9或 10 或 11 或 12或 13或 14或 15所述的节水型全自动洗衣机浮体式密 封装置, 其特征是所述的密封罩密封面(11a)及托盘密封面(5a)复合 一层压变性、 弹性及机械强度好的材料。
21. 根据权利要求 7或 8所述的节水型全自动洗衣机浮体式密 封装置, 其特征是所述的密封圈 (20) 的密封面的表面复合一层压 变性、 弹性及机械强度好的材料。
22. 根据权利要求 1所述的节水型全自动洗衣机浮体式密封装 置, 其特征是所述的密封圈 (20) 下部有一环形裙边, 该裙边与密 封罩 ( 11) 成为一体, 该裙边与浮体 (20c) 之间设有可伸缩连接体 (20d), 该可伸缩连接体 QOd)足眵使密封圈 (20) 的浮体 (20c) 上浮 时密封圈(20)的内密封面(200与托盘密封面(5a)紧密接触形成密封付。
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AU2003242097A1 (en) 2003-12-02
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KR20040108782A (ko) 2004-12-24
CN1236127C (zh) 2006-01-11
KR100627116B1 (ko) 2006-09-25

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