CN1126257A - Washing machine and balance member - Google Patents
Washing machine and balance member Download PDFInfo
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- CN1126257A CN1126257A CN95103541A CN95103541A CN1126257A CN 1126257 A CN1126257 A CN 1126257A CN 95103541 A CN95103541 A CN 95103541A CN 95103541 A CN95103541 A CN 95103541A CN 1126257 A CN1126257 A CN 1126257A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/12—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a vertical axis
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/24—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a vertical axis
- D06F37/245—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
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- Textile Engineering (AREA)
- Centrifugal Separators (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
The invention relates to a washing machine, and the washing machine reduces the vibration amplitude which is caused by the imbalance of a balance part. The balance part in the washing machine has critical speed which is lower than the rated rotational speed, the internal space of the balance part is divided into a plurality of cavities along the circumference by partition boards, a channel is arranged on each partition board, so the liquid which is contained in the cavities can flow in the cavities after reaching the specific rotational speed.
Description
Present invention generally relates to washing machine with equalizing feature, the liquid of sealing is housed in this equalizing feature, with the uneven Oscillation Amplitude that produces of bucket in reducing, specially refer to a kind of washing machine, wherein, adverse effect reduces, and to be liquid caused before the resonance point of imbalance resonance this adverse effect, and since the vibration that liquid causes stablized.
Known conventional washing machine, in order to reduce the unbalanced Oscillation Amplitude that washing causes when (for example washing clothes), upper, open end at interior bucket is equipped with an equalizing feature, equalizing feature is made up of following part: a cavity ring, the inner space of cavity ring is separated into the dividing plate of a plurality of cavitys, and is sealed in the liquid in these cavitys.
Above-mentioned equalizing feature in this class washing machine is described as uncompensated load adjustment balance when being used at washing.When washing machine drove or turn round, the liquid in the equalizing feature flowed towards the direction opposite with uncompensated load hastily, and most of liquid collides mutually, and the result makes big vibration be passed to the outside framework of washing machine.In order to eliminate this phenomenon, for example, in No. 5642314, Japanese patent examination communique, advise being provided with on each dividing plate a circulation passage, flow rapidly to prevent this of liquid.
Liquid in above-mentioned conventional equalizing feature, when rotated under the action of centrifugal force that is produced, concentric or the coaxial Free Surface of rotating shaft of formation and equalizing feature, in other words, when interior bucket was subjected to influence of unbalance, the liquid in the equalizing feature formed a circle, its axle center that is centered close to the equalizing feature cavity ring makes on the direction that imbalance exists, the radial thickness of liquid reduces, the result, and liquid produces and reduces unbalanced effect.This effect has been used.
Generally speaking, according to the reaction of rotary part to vibration, exist a kind of like this trend: when rotary speed is being lower than when increasing under " critical speed " Nc of specified rotary speed, the amplitude of vibration increases thereupon, when rotary speed reached critical speed Nc, Oscillation Amplitude reached maximum, then, when rotary speed surpassed critical speed Nc, vibration was near a constant amplitude.
In the equalizing feature of above-mentioned washing machine, when rotary speed surpassed critical speed Nc, the liquid in the cavity ring was positioned at and a uneven opposite side, and the rotating shaft of cavity ring is between them.That is, when rotated owing to action of centrifugal force, the axle center of liquid cylindrical Free Surface along unbalanced direction, moves apart the rotating shaft of cavity ring, causes a correction to reduce Oscillation Amplitude like this.Yet under critical speed, with respect to the rotating shaft of washing machine, the rotating shaft of cavity ring is positioned at a uneven side, like this, forms the thicker part of cylindrical liquid in a uneven side, and this will further aggravate imbalance, increases Oscillation Amplitude.Before rotary speed surpassed critical speed Nc, the increase of Oscillation Amplitude not only produced vibration and noise, and had reduced the reliability of machine, and therefore, this is undesirable for washing machine.In addition, rotary speed even may surpass only critical speed.Like this, there is such problem in conventional structure: though in the working range that surpasses critical speed Nc, imbalance can access correction,, at the gamut of running speed, be difficult to reduce imbalance.
The purpose of this invention is to provide a kind of structure, adopt this structure,, suppressed to be included in the motion of the liquid in the equalizing feature, prevented from the imbalance that increases owing to equalizing feature from therefore, to have reduced resonance amplitude reaching critical speed (resonance point) before.
For this purpose, according to an aspect of the present invention, provide a kind of washing machine, this washing machine is made up of following part: bucket in, its heart position, bottom is equipped with an impeller; An outer bucket, interior barreled is therein; An outside framework supports outer bucket by suspending rod; An equalizing feature, comprise one be installed in the cavity ring of bucket upper, open end, the inner space of cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, be sealed in the liquid in the cavity, the lane device that allows liquid between cavity, to flow; Before interior bucket rotary speed reached critical speed, by because the change of the liquid free surface that the rotation of interior bucket produces, lane device had suppressed liquid and has flowed between cavity.
Liquid free surface is the theoretical surface that liquid forms under the effect of centrifugal force (rotation of equalizing feature produces) and gravity, or the average surface of measuring according to the liquid surface that reality forms.For example, for the surface that gains freedom in theory, the physical characteristic of liquid as density and viscosity, wherein is sealed with the shape of cross section or the like of the cavity of liquid, all will take in.
Lane device may comprise a second channel, has only when interior bucket is in stationary condition, and second channel just allows liquid to flow between cavity, and interior bucket rotary speed surpasses after the critical speed, and first passage allows liquid to flow between cavity.
The zone of liquid free surface vertical direction when bucket was positioned at inactive state in first passage was arranged on, the liquid free surface that obtains when surpassing critical speed with rotary speed when interior bucket contacts, and the Free Surface during than critical speed more close in the bucket rotating shaft.Second channel is arranged on the zone of the Free Surface vertical direction of liquid when static (), and liquid when static () Free Surface contacts, and the more close rotating shaft of liquid free surface that obtains when being in specified rotary speed than interior bucket.
The zone of liquid free surface vertical direction when bucket remained static in first passage was arranged on, the liquid free surface that obtains when surpassing critical speed, the opposite direction of bucket rotating shaft in this first passage is in respect to interior bucket rotary speed; Second channel is arranged on the zone of vertical direction of the Free Surface of liquid when static (), and the Free Surface of liquid when static () contacts, and the more close rotating shaft of liquid free surface that obtains when being in specified rotary speed than interior bucket.
First passage and second channel can link together.
According to a further aspect in the invention, provide a kind of equalizing feature that is used in the washing machine, washing machine is made up of following part: bucket in, and its bottom centre position is equipped with an impeller; An outer bucket, interior barreled is therein; An outside framework supports outer bucket by suspending rod; An equalizing feature, comprise one be installed in the cavity ring of bucket upper, open end, the inner space of cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, be sealed in the liquid in the cavity, the lane device that allows liquid between cavity, to flow; Before interior bucket rotary speed reached critical speed, by because the change of the liquid free surface that the rotation of interior bucket produces, lane device had suppressed liquid and has flowed between cavity.
In above-mentioned equalizing feature, lane device may comprise a second channel, has only when interior bucket remains static, and second channel just allows liquid to flow between cavity, interior bucket rotary speed surpasses after the critical speed, and first passage allows liquid to flow between cavity.
In above-mentioned equalizing feature, the zone of the vertical direction of liquid free surface when bucket remained static in first passage was arranged on, the liquid free surface that is obtained when surpassing critical speed with rotary speed when interior bucket contacts, and than (during critical speed) bucket rotating shaft in Free Surface is more close.Second channel is arranged on the zone of the Free Surface vertical direction of liquid when static (), and the Free Surface of liquid when static () contacts, and the more close rotating shaft of liquid free surface that obtains when being in specified rotary speed than interior bucket.
In above-mentioned equalizing feature, the zone of the vertical direction of liquid free surface when bucket remained static in first passage was arranged on, the liquid free surface that obtains when surpassing critical speed with respect to interior bucket rotary speed, this zone are in and the opposite direction of interior bucket rotating shaft; The zone of the vertical direction of the Free Surface that is arranged on liquid when static () of second channel, and the Free Surface of liquid when static () contacts, and the more close rotating shaft of liquid free surface that obtains when being in specified rotary speed than interior bucket.
In above-mentioned equalizing feature, first passage and second channel can link together.
In washing machine of the present invention and equalizing feature, even first passage and second channel can not be provided with in above-mentioned desirable position and zone, respectively, by different more or less independently situations, as long as an interior bucket rotary speed reaches before the critical speed, the mobile of liquid is suppressed, and superior effect of the present invention just can reach.
In said structure, when the increase of washing machine inner tub rotary speed, the liquid surface in the cavity ring forms a paraboloid of revolution under action of centrifugal force.That is, the surface of liquid becomes from the inner periphery of cavity ring and is inclined upwardly to excircle.After the rotation beginning, when the paraboloid of revolution formed, set second channel result did not contact with liquid, and correspondingly, after the rotation beginning, liquid can not flow into the cavity that adjoins by second channel.And, when rotary speed surpasses critical speed, formed the paraboloid of revolution and flowed into the cavity that adjoins continuously by first passage with that part of liquid that is positioned at the cavity ring upper outer circumference.Like this, liquid has just flowed into and the uneven opposite side of interior bucket.This just can prevent to form the thick part of cylindrical liquid in a uneven side.As a result, the amplitude that can both reduce to vibrate at whole rotational velocity range.
Rotary speed surpasses after the critical speed, if at this moment first passage is submerged in the liquid, second channel is set preferably on layout, and by second channel, the gas in the cavity ring can flow between cavity.
Fig. 1 is the vertical cross section of washing machine of the present invention;
Fig. 2 is the plane of an embodiment of equalizing feature of the present invention;
Fig. 3 is the front view of the equalizing feature of Fig. 2, and wherein the part is a profile;
Fig. 4 is the perspective view of a part of the equalizing feature of Fig. 2;
Fig. 5 is that explanation dividing plate quantity and self-excited vibration produce the schematic diagram that concerns between the rotary speed, its objective is to be used for explaining effect of the present invention;
Fig. 6 is the profile of an embodiment of equalizing feature of the present invention, and its relation surperficial and channel position when contained liquid remains static in the cavity is described;
Fig. 7 is the profile of an embodiment of equalizing feature of the present invention, and the relation on its surface and channel position when contained liquid in the cavity is in starting stage of rotation is described;
Fig. 8 is the profile of an embodiment of equalizing feature of the present invention, and the relation on its surface and channel position when contained liquid in the cavity is in interstage of rotation is described;
Fig. 9 is the profile of an embodiment of equalizing feature of the present invention, and its relation surperficial and channel position when contained liquid is in normal speed in the cavity is described;
Figure 10 A and Figure 10 B are two profiles, and two embodiment of equalizing feature of the present invention are described respectively;
Figure 11 is another embodiment of equalizing feature of the present invention;
Figure 12 is the perspective view of local broken-out section of the equalizing feature of Figure 11;
Figure 13 is another follow-on profile of equalizing feature of the present invention;
Figure 14 is another follow-on profile of equalizing feature of the present invention;
Figure 15 is another follow-on profile of equalizing feature of the present invention;
Figure 16 is another follow-on profile of equalizing feature of the present invention;
Figure 17 is another follow-on profile of equalizing feature of the present invention;
Figure 18 A and Figure 18 B represent the follow-on profile of equalizing feature of Figure 13 and Figure 14 respectively;
Figure 19 A to Figure 19 C represents the follow-on profile of equalizing feature of Figure 15 respectively;
Figure 20 A to Figure 20 E represents the follow-on profile of equalizing feature of Figure 16 respectively;
Figure 21 A to Figure 21 C represents the follow-on profile of equalizing feature of Figure 17 respectively;
Figure 22 is illustrating of rocking of liquid of the present invention;
Figure 23 is the schematic illustration that concerns between bucket rotary speed and the Oscillation Amplitude about in the present invention and the conventional structure;
Figure 24 is another follow-on partial cut-away perspective view of equalizing feature of the present invention;
Figure 25 is the partial cut-away perspective view of equalizing feature of the present invention, and an embodiment of passage has been described:
Figure 26 A to Figure 26 G is and the similar perspective view of Figure 25 that the different modifieds of passage have been described respectively;
Figure 27 is the partial cut-away perspective view of equalizing feature of the present invention, and another modified of passage has been described;
Figure 28 A and Figure 28 B are and the similar perspective view of Figure 27 that the different modified of passage has been described respectively;
Figure 29 is the local horizontal profile of equalizing feature of the present invention, and an embodiment of passage has been described;
Figure 30 is and the similar local horizontal profile of Figure 29 that a modified of passage has been described;
Figure 31 A to Figure 31 H is and the similar local horizontal profile of Figure 29 that the different modifieds of passage have been described;
Figure 32 A to Figure 32 E is and the similar local horizontal profile of Figure 30 that the different modifieds of passage have been described;
Figure 33 is the local horizontal profile of equalizing feature of the present invention, and another modified of passage has been described;
Figure 34 is and the similar local horizontal profile of Figure 33 that another modified of passage has been described;
Figure 35 is another follow-on partial cut-away perspective view of equalizing feature of the present invention.
Fig. 1 has shown a most preferred embodiment of washing machine of the present invention.This washing machine is made up of following part: the interior bucket 3 of equalizing feature 1 and impeller 2 is housed, and the outer bucket 4 of interior bucket 3 is equipped with in inside, supports the outside framework 6 of outer bucket 4 by suspending rod 5.
In washing operation, motor 7 rotates impeller by wheel-belt system and clutch 8, and in dehydration, motor 7 rotates interior bucket by wheel-belt system and clutch.Motor 7 and clutch 8 usefulness bolts are securely fixed on the center base 9, and center base firmly fixes outside on the bottom surface of bucket 4 with screw.Interior bucket is supported on the axle of clutch 8 by flange 10.
Only shown the building block of equalizing feature 1 (these parts are to constitute major part of the present invention) and washing machine among the figure, other parts such as switch-board etc. have all omitted.
Fig. 2 is the plane of an embodiment of equalizing feature 1 of the present invention, and Fig. 3 is its front view.In these figure, a gimbal 11 is made up of the first half and a Lower Half that welds together by face of weld 12.Liquid 13 and gas 14 are sealed in the gimbal 11 according to certain ratio, and the inside of gimbal 11 is separated into a plurality of cavitys by a plurality of dividing plates 15, separates along circumference mutually.Though in Fig. 2, the number of cavity is 6, be not limited to 6.Sealed liquid 13 preferably has highdensity physical characteristic, adopts saturated brine solution usually.In many cases, gas 14 is air.A pair of first passage 16a and second channel 16b are arranged on the dividing plate 15, liquids and gases can therefrom be passed through, a surface of each passage just and face of weld coincide, that is to say, be positioned on the plane at face of weld place.
Fig. 4 is the partial cut-away perspective view of an equalizing feature of the present invention, but does not express the liquid that is comprised in the equalizing feature among Fig. 4.In order to proofread and correct liquid 13 contained in the gimbal 11 (being separated into a plurality of cavitys) in the inactive state imbalance, also in order to allow gas 14 to pass through when rotated, second channel on each dividing plate 15 is arranged on such position: the surface with liquid 13 when static contacts, and does not contact with liquid during rotation.More particularly, second channel is positioned at the position of dividing plate 15 near the rotating shaft of gimbal 11, and the lower surface of second channel 16b contacts with the surface of inactive liquid 13, and the face of weld 12 of upper surface and gimbal 11 coincides.
After reaching critical speed, in order to allow the flowing of liquid 13 in the adjacent cavities, first passage 16a is arranged on such position, do not contact with the interior contained liquid of cavity when making it static, just reached when rotated after the critical speed, contacted with the Free Surface (this is determined by the centrifugal force that acts on the contained liquid) of liquid.More particularly, the face of weld 12 of the lower surface of first passage 16a and gimbal 11 coincides, and first passage is arranged on the top of liquid surface when static, just reached when rotated after the critical speed, first passage just and the Free Surface of liquid 13 contact.
, to Figure 11 the operation of the above embodiment of the present invention is illustrated with reference to figure 5.
Fig. 5 is the schematic diagram that concerns between the dividing plate quantity separated along circumference in the explanation equalizing feature and the self-excited vibration generation speed, and this is an example of numerical analysis.We will be noted that therefrom along with the increase of dividing plate quantity, self-excited vibration produces rotary speed and will uprise.The inside of gimbal (hollow rotary part) 11 is separated into a plurality of cavitys by the dividing plate of separating along circumference 15, and self-excited vibration produces rotary speed and is configured to be higher than specified rotary speed.According to such arrangement, in the scope of specified rotary speed, can realize the stability of rotary part.
Fig. 6 to Figure 11 has shown in passage 16a on the equalizing feature dividing plate 15 of the present invention and the relation of the position between 16b and the liquid free surface.Fig. 6 shown contained liquid when inactive state surperficial 21b and the relation between the second channel 16b, contained liquid 13 flows in the adjacent cavities that is separated by dividing plate 15 by passage 16b, makes the amount of the liquid in the adjacent chambers equate.Best situation is that the passage 16b on each vertical direction (this passage is the imbalance that is used for proofreading and correct contained liquid 13 in the gimbal 11 that is divided into a plurality of cavitys) its lower surface when static contacts with the surface (horizontal surface) of liquid 13.For actual use, when static, the lower surface of passage 16b is preferably a little less than the surface of liquid 13.Its reason is, if the surface of the lower surface of passage 16b and liquid 13 is arranged on the same level, probably liquid is subjected to acting on capillary influence on the contained liquid 13 in the mobile meeting between the adjacent cavities.
In position radially, preferably be positioned as close to the rotating shaft of interior bucket as for passage 16b, like this, in rotary course, liquid that can not therefrom passes through.In actual use, passage 16b can be arranged on the place of leaving the gimbal inner peripheral wall, as long as liquid 13 can not flow through passage when rotated.When rotated, passage 16b also can promote the circulation of other fluid in the equalizing feature (for example gas 14), is used for preventing owing to other fluid volume in the cavity that causes that flows of liquid 13 changes the pressure vibration that causes.Therefore, eliminated the effect of shaking that the pressure vibration of gas 14 in the cavity causes, thereby, the liquid vibration phenomenon such as rocking suppressed.In addition, low-level if the pressure of the gas 14 in the cavity remains on, because the effect of shaking that gas 14 causes also can weaken, therefore, also can suppress the liquid vibration phenomenon such as rocking.
Fig. 7 has shown that rotation reaches before the critical speed, the position relation between the Free Surface of contained liquid 13 and passage 16a, the 16b.
Fig. 8 has shown that rotation has just reached after the critical speed, position relation between the Free Surface of contained liquid 13 and passage 16a, the 16b, shown also simultaneously that contained liquid 13 flows in the cavity of being separated by dividing plate 15 by first passage 16a, therefore eliminated imbalance.Like this, (this passage is to be used for after reaching critical speed with regard to first passage, allow liquid in the gimbal that is separated, to flow) in vertical direction position, the lower surface of passage 16a is arranged on the top of the surperficial 21b (being horizontal surface) that liquid 13 remains static, preferably be arranged on this position, when rotary speed during a little more than critical speed, or rotary speed is in a little more than the scope of critical speed to normal speed, and lower surface contacts with the Free Surface of liquid 13.Its reason is just to begin later on because the uneven liquid flow that causes surpasses critical speed in rotary speed; Because decay can produce the regular hour and lag behind; When specified rotary speed, require liquid finally to play the effect of balancer.
Fig. 9 has shown when being in specified rotary speed, the Free Surface 21 of contained liquid 13 and the relation of the position between passage 16a and the 16b, be in scope above critical speed in rotary speed, even first passage 16a is swallowed up by liquid 13, its predetermined purpose is also unaffected.
Similarly, radial position as for first passage 16a, first passage preferably is arranged on such position, when critical speed, mainly contact with it, for actual use by the Free Surface 21a that acts on the liquid that centrifugal force determined 13 on the liquid, passage 16a preferably is arranged on such position, when rotary speed during a little more than critical speed, or rotary speed is in a little more than the scope of critical speed to normal speed, and passage contacts with the Free Surface of liquid 13.Its reason is just to begin later on because the uneven liquid flow that causes surpasses critical speed in rotary speed; Because decay can produce the regular hour and lag behind; When specified rotary speed, require liquid finally to play the effect of balancer.
Figure 10 A and Figure 10 B have shown two embodiment about the position of first passage 16a.In both of these case, passage 16a is arranged on such position, and promptly passage contacts with the Free Surface 21a of liquid 13, and Free Surface is determined by following factors: the centrifugal force of gimbal, the physical characteristic of contained liquid 13, the amount of contained liquid and the critical speed of system.
Though adopted two passage 16a and 16b in the above-described embodiments, above-mentioned effect and purpose also can realize by a single passage, one end shape of this single passage is equivalent to (first passage 16a) in above-mentioned two passages, and other end shape is equivalent to another passage (second channel 16b), as shown in figure 11.
Figure 12 has shown another embodiment of the present invention, and its single passage has reached the purpose of two passages shown in Figure 4.Figure 12 is a partial cut-away perspective view, has shown a part of gimbal 11, has a single passage 16 on each dividing plate 15.Do not demonstrate contained liquid 13 among the figure.The imbalance of the liquid 13 when proofreading and correct inactive state in the gimbal 11 (being separated into a plurality of cavitys), also allow in order to rotate gas 14 to flow, the inner of passage 16 is arranged on such position, and the surface with liquid 13 when static contacts, and does not contact with liquid 13 when rotated.More particularly, the inner of passage 16 is positioned at the position of the rotating shaft of close gimbal 11 on the dividing plate, and its lower surface contacts with the surface of inactive liquid 13, and the face of weld of upper surface and gimbal 11 coincides.
After reaching critical speed, in order to allow the flowing of liquid 13 in the adjacent cavities, the outer end of passage 16 is arranged on such position, do not contact with the interior contained liquid of cavity when making it static, just reached when rotated after the critical speed, contacted with the Free Surface (this is determined by the centrifugal force that acts on the contained liquid) of liquid.More particularly, the outer end of passage 16 is arranged on the top of liquid surface when static, just reached when rotated after the critical speed, the passage outer end just and the Free Surface of liquid 13 contact.
At the manufacture view of gimbal 11, arrange to open the lower surface of the passage 16 on dividing plate 15 or upper surface and face of weld and coincide, can make the mould form removal of line balancing ring easy like this, the shape of passage is not taper towards face of weld.
Figure 13 to Figure 17 has shown the position of face of weld (this face of weld connects together the first half and the Lower Half of gimbal 11), passage 16a, 16b on the dividing plate 15,16 position, with the Free Surface relation of plane of liquid 13, the different relations of passage 16a, the 16b on the position that has also shown simultaneously the face of weld 12 on the gimbal 11 and the dividing plate 15,16 position.In Figure 13 and Figure 14, when inactive state, the face of weld 12 of liquid free surface 21b and gimbal coincides.In Figure 13, be provided with two passages, and in Figure 14, only be provided with a single passage.In Figure 15 to Figure 17, the face of weld 12 of gimbal 11 is arranged on the position of liquid free surface 21b top when being higher than inactive state.In Figure 15 and Figure 17, be provided with two passage 16a and 16b, and in Figure 16, only be provided with a single passage 16.More particularly, in Figure 13 and Figure 14, passage 16a, 16b, 16 lower surface and face of weld 12 coincide, in Figure 15, upper surface and the face of weld 12 of the lower surface of a passage 16a and another passage 16b coincide, in Figure 16 and Figure 17, passage 16a, 16b, 16 upper surface and face of weld 12 coincide.
Like this, the surface of passage and the face of weld 12 of gimbal 11 coincide, and the shape of passage is not taper towards face of weld.Adopt this layout, the easy form removal of the mould of gimbal.
Figure 18 to 21 has shown several embodiment in addition of the gimbal that relates to Figure 13 to Figure 17.The part sectioned view of Figure 18 A and Figure 18 B has shown respectively and Figure 13 and Fig. 14 similar gimbals, the part sectioned view of Figure 19 A to Figure 19 C has shown the similar gimbal with Figure 15, the part sectioned view of Figure 20 A to Figure 20 E has shown the similar gimbal with Figure 16, Figure 21 A to Figure 21 C has shown the similar gimbal with Figure 17, in Figure 18 to Figure 21, shown the position of dissimilar passage 16,16a and 16b.
And, for fear of owing to above-mentioned liquid single or two cavitys that passage connected rock the covibration that causes, change the structure of passage, make the vibration frequency of the frequency of liquid vibration and system architecture isolated, reach the effect of anti-resonance vibration like this.A kind of change of channel design is the cross section that reduces circulation passage, and another kind of the change is the length that increases circulation passage.These changes all are in order to reduce vibration frequency, to reach the purpose of anti-resonance vibration.
Figure 22 has generally shown the liquid swag phenomenon between the cavity that links together by passage.The vibration frequency of Chan Shenging is represented by following formula in this case:
ω=A/B (formula 1)
A=(1+S1/S2) α (formula 2)
B=(1+S1/S2) h+l (S1/S0) (formula 3)
Wherein, ω represents vibration frequency, and α represents centrifugal acceleration, the h representative does not have imbalance to have the liquid thickness that is in the cumulative stage of speed under the situation, l represents the length of circulation passage, and S0 represents the cross-sectional area of circulation passage, and S1 and S2 represent the cross-sectional area of cavity.The numerical value of α, S1 and S2 is mainly determined by the structure of washing machine.As can be seen, increase circulation passage cross section S0 or increase the circulation passage length l, can reduce vibration frequency ω effectively.
For abbreviation, here the radius of gimbal is represented with r, the height of gimbal is represented with t, the number that gimbal is separated along circumference is represented with n, the cross section of cavity is represented (S1=2 π rt/n) with S1, the intrinsic frequency of system architecture represents that with ω 1 rotary speed represents that with ω 2 the anti-resonance vibration effect is represented with following formula usually:
ω＜ω1
Yet above-mentioned covibration is not only by the intrinsic frequency of system architecture (=sway frequency) and is produced, and produces (the intrinsic frequency ω 1+ sway frequency ω of ω 2=system architecture) by speed ω 2.The system architecture intrinsic frequency of being touched upon, its characteristics are to be subjected to the influence of the gyroscopic action that rotation produced relevant with vibration mode, change along with rotary speed, and also proportional with rotary speed substantially.Also along with changing with the corresponding centrifugal force of rotary speed, the connection of cavity is depended in the change of cross section to sway frequency, and makes vibration frequency also change.According to these, have been found that from empirical value following situation is best:
3 ω＜ω 1 (formula 4)
With following formula 5 substitution ω 1, can draw following formula 6:
A＝2r(ω2)
2，
B＝2h＋l(S1/S0)
ω
2=2r (ω 1+ ω)
2/ (2h+l (S1/S0)) (formula 6)
In formula 6, replace ω 1 with 3 ω, can draw following formula:
ω
2＞2r (3 ω+ω)
2/ (2h+l (S1/S0)) (formula 7)
This formula is out of shape, because h/r＜＜1 can draw following formula:
L (S1/S0)/2r＞16 (formula 8)
With this formula of S1 substitution, can draw following formula:
L π t/nS0＞16 (formula 9)
This formula is out of shape, can draws following formula:
Tl/S0＞16n/ π (formula 10)
Find out that from this formula preferably l is big, S0 is little, for example, in formula 10, the numerical value of tl/S0 can draw according to the number that gimbal is separated along circumference, it can also be seen that, when n=6, this numerical value should be less than 30.5, and when n=12, this numerical value should be less than 61.1.
Figure 23 with reference to showing outer bucket Oscillation Amplitude and rotary speed relation can describe effect of the present invention.In this figure, axis of abscissas is represented rotary speed, and axis of ordinates is represented Oscillation Amplitude.For relatively, in Figure 23, dotted line represents that the result that adopts conventional equalizing feature to obtain, solid line represent the result who adopts embodiments of the invention to obtain.Be lower than in rotary speed under the situation of per minute 500 commentaries on classics, the difference of dotted line and solid line has been represented because the effect that the position produced of circulation passage of the present invention can find out obviously that from figure Oscillation Amplitude reduces.Reaching per minute 1000 in rotary speed turns left under the right situation, the difference of dotted line and solid line has illustrated the length of circulation passage of the present invention and the effect that channel cross-section is produced, therefrom can obviously find out, realize stable oscillation phenomenon, eliminate covibration.
Figure 24 is the perspective view of one embodiment of the present of invention, and wherein the length of first passage 16a (after reaching critical speed, this passage allows liquid to flow in cavity, sees shown in Figure 4) does not demonstrate contained liquid significantly greater than the thickness 18 of dividing plate 15 among the figure.
Figure 25 is the first half of gimbal 11 shown in Figure 24, is in the perspective view under the flip vertical situation.
Figure 26 A to Figure 26 G has shown the modified of first passage 16a shown in Figure 24 respectively, and its position is identical with Figure 25 with the position.
Figure 26 A has shown an embodiment, and in this embodiment, the surface of passage 16a as shown in figure 25 is that the outer circle wall 19 by gimbal 11 is constituted.
Figure 26 B has shown an embodiment, and the thickness of dividing plate 15 increases, with the equal in length of passage 16a shown in Figure 25.
Figure 26 c has shown an embodiment, and in this embodiment, the thickness of dividing plate 15 as shown in figure 26 radially increases gradually along gimbal 11.
Figure 26 D and Figure 26 E have shown two embodiment, the outer circle wall of gimbal 11 (shown in Figure 26 A) is as the surface of passage 16a, radially there is being a relative displacement on this surface, more particularly, in Figure 26 D, outer circle wall 19 radially outward protrudes, and among Figure 26 E, excircle type 19 is radially inwardly recessed.
Figure 26 F has shown an embodiment, and in this embodiment, the channel part shown in Figure 26 A has a thin-slab structure.
Figure 26 G has shown an embodiment, and in this embodiment, the channel part shown in Figure 26 A has a cross structure.
Figure 27 has shown an embodiment, and its passage 16a is made of a separating component, and in this embodiment, the surface of passage 16a needn't coincide with the face of weld 12 of gimbal 11.
Figure 28 A and Figure 28 B have shown two other embodiment, and its passage 16a is made of a separating component, and more particularly, Figure 28 A is and the similar perspective view of Figure 27, and the surface of passage 16a is that the outer circle wall 19 by gimbal 11 constitutes.Figure 28 B is and the similar perspective view of Fig. 4, the shape of passage 16a is not straight, but U type basically.In these figure, contained liquid does not all have expression.Such separating component passage can be securely fixed on the dividing plate 15 with adhesive, assembling groove or any other suitable method.
In the above-described embodiments, except Figure 27 and Figure 28, though for simplicity, the cross section of represented passage 16a all is square, is not limited to so square.Any other suitable shape can realize the purpose of being scheduled to, as long as passage 16a has the length of required circulation passage and the cross-sectional area of required circulation passage.Though can be considered to cross section as passage such as difformities such as circular and triangles, from the viewpoint of making, it is relatively more suitable outwards becoming horn-like towards the face of weld of gimbal.In a word, circular or circular and polygonal combining all can be adopted, and still, is suitable for actual use in the square and square following scope.
Figure 29 and Figure 30 have shown the embodiment of a circumferential passage 16a, are to see from the top of the face of weld of the gimbal 11 that is provided with passage.Figure 29 has shown a passage with straight-line profile vertical with dividing plate 15.The passage that Figure 30 shows has identical width along outer circle wall 10.
Figure 31 has shown the different modifieds with the similar beeline channel of Figure 29.More particularly, Figure 31 A has shown a kind of along the tapered passage of direction of rotation.Figure 31 B has shown a kind of passage along the direction of rotation flue.Figure 31 C has shown a kind of passage along the angled straight-line profile of direction of rotation and dividing plate 15, and its upstream extremity is near rotating shaft.Figure 31 D has shown the passage that a kind of central part inwardly takes in.Figure 31 E has shown a kind of passage that takes in round about.Figure 31 F has shown a kind of passage along the angled straight-line profile of direction of rotation and dividing plate 15, and its downstream is near rotating shaft.Figure 31 G has shown a kind of passage that goes out towards crown of roll.Figure 31 H has shown a kind of towards the recessed passage of axle opposite direction.
Figure 32 has shown the different modifieds of the beeline channel that extends along outer circle wall as shown in figure 30.Figure 32 A has shown that an example surface is the passage of straight line for arc, a side surface.Figure 32 B has shown along the passage of direction of rotation flue.Figure 32 C has shown along the tapered passage of direction of rotation.Figure 32 D has shown the near passage of central part receipts.Figure 32 E has shown that central part receives near passage round about.
Above-mentioned passage 16a is the level cross-sectionn shape in the difformity of circumferencial direction, and passage can have the perpendicular cross-sectional shape of similar characteristics, and in fact employed profile is combining of these shapes.
In the above-described embodiments, though the tangent line of dividing plate 15 and the external peripheral surface of gimbal 11 be provided with perpendicularly,, angled even dividing plate is arranged to along direction of rotation, also can reach predetermined purpose, as Figure 33 and shown in Figure 34.
In the above-described embodiments, though gimbal 11 all is single loop configuration,, even between the inner peripheral wall of gimbal and outer circle wall, a circumference dividing plate 20 is set, gimbal is divided into as shown in figure 35 multiring structure, also can reach predetermined purpose.
In the embodiment of the invention described above, because the liquid 13 that is included in the equalizing feature is reaching mobile between the resonance point, the imbalance that motion produced of contained liquid 13 can not increase, and therefore, has reduced resonance amplitude.And resonance amplitude reduces, and the range of application of fluid balance device increases.As a result, a less numerical value can be got in the slit between rotary part and the stationary parts, makes machine in the size with a compactness.And self-excited vibration produces rotary speed can be transferred to a higher rotary speed.What as a result, the specified rotary speed of machine can be established is higher.And because vibration has obtained stablizing, vibration and noise reduce, and the reliability of machine also just can be strengthened.
Claims (18)
1. a washing machine is made up of following part: bucket in, and bottom centre position of bucket is equipped with an impeller in this; An outer bucket, above-mentioned interior barreled is therein; An outside framework supports above-mentioned outer bucket by suspending rod; An equalizing feature, comprise a cavity ring that is installed in above-mentioned interior bucket upper, open end, the inner space of above-mentioned cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, is sealed in the liquid in the above-mentioned cavity, and the lane device that allows aforesaid liquid between above-mentioned cavity, to flow;
Wherein, a bucket rotary speed reaches before the critical speed in above-mentioned, and the change of the aforesaid liquid Free Surface that the rotation by bucket in above-mentioned produces makes above-mentioned lane device suppress aforesaid liquid flowing between above-mentioned cavity.
2. a washing machine is made up of following part: bucket in, and bottom centre position of bucket is equipped with an impeller in this; An outer bucket, above-mentioned interior barreled is therein; An outside framework supports above-mentioned outer bucket by suspending rod; An equalizing feature, comprise a cavity ring that is installed in above-mentioned interior bucket upper, open end, the inner space of above-mentioned cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, is sealed in the liquid in the above-mentioned cavity, and the lane device that allows aforesaid liquid between above-mentioned cavity, to flow;
Wherein, above-mentioned lane device comprises a second channel, has only when bucket remains static in above-mentioned, and second channel just allows aforesaid liquid to flow between above-mentioned cavity, the bucket rotary speed surpasses after the critical speed in above-mentioned, and first passage just allows aforesaid liquid to flow between above-mentioned cavity.
3. according to a kind of washing machine of claim 2, it is characterized in that above-mentioned first passage and above-mentioned second channel link together.
4. a washing machine is made up of following part: bucket in, and bottom centre position of bucket is equipped with an impeller in this; An outer bucket, above-mentioned interior barreled is therein; An outside framework supports above-mentioned outer bucket by suspending rod; An equalizing feature, comprise a cavity ring that is installed in above-mentioned interior bucket upper, open end, the inner space of above-mentioned cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, is sealed in the liquid in the above-mentioned cavity, and the lane device that allows aforesaid liquid between above-mentioned cavity, to flow;
Wherein, above-mentioned lane device comprises a first passage and a second channel, the vertical direction zone of bucket (3) Free Surface (21b) of aforesaid liquid (13) when remaining static in above-mentioned, this first passage 16a and the Free Surface (21a) that is obtained when the rotary speed of bucket (3) surpasses critical speed in above-mentioned contact, and than above-mentioned Free Surface (21a) more close above-mentioned in the rotating shaft of bucket (3); Second channel (16b) is arranged on the vertical direction zone of above-mentioned Free Surface (21b), (21b) contacts with above-mentioned Free Surface, and the more close above-mentioned rotating shaft of Free Surface (21) of the aforesaid liquid that obtains when being in specified rotary speed than bucket (3) in above-mentioned.
5. according to a kind of washing machine of claim 4, it is characterized in that above-mentioned first passage (16a) and above-mentioned second channel (16b) link together.
6. according to a kind of washing machine of claim 4, it is characterized in that, above-mentioned lane device and above-mentioned equalizing feature are to determine like this, make (lt/S0)＞(16n/ π) set up, wherein l represents the length of above-mentioned lane device, S0 represents the cross-sectional area of above-mentioned lane device, and t represents the height of above-mentioned cavity, and n represents the number of above-mentioned equalizing feature along the cavity of circumference separation.
7. a washing machine is made up of following part: bucket in, and bottom centre position of bucket is equipped with an impeller in this; An outer bucket, above-mentioned interior barreled is therein; An outside framework supports above-mentioned outer bucket by suspending rod; An equalizing feature, comprise a cavity ring that is installed in above-mentioned interior bucket upper, open end, the inner space of above-mentioned cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, is sealed in the liquid in the above-mentioned cavity, and the lane device that allows aforesaid liquid between above-mentioned cavity, to flow;
Wherein, above-mentioned lane device comprises a first passage and a second channel, first passage (16a) is arranged on the zone of above-mentioned interior bucket (3) vertical direction of the Free Surface (21b) of aforesaid liquid when remaining static, surpass the Free Surface (21a) of the aforesaid liquid (13) that critical speed obtained with respect to the rotary speed of bucket (3) in above-mentioned, this passage (16a) be in above-mentioned in the opposite direction of rotating shaft of bucket (2); Second channel (16b) is arranged on the zone of above-mentioned Free Surface (21b) vertical direction, (21b) contacts with above-mentioned Free Surface, and the more close above-mentioned rotating shaft of Free Surface (21) of the aforesaid liquid (13) that obtains when being in specified rotary speed than bucket (3) in above-mentioned.
8. according to a kind of washing machine of claim 7, it is characterized in that above-mentioned first passage (16a) and above-mentioned second channel (16b) link together.
9. according to a kind of washing machine of claim 7, it is characterized in that, above-mentioned lane device and above-mentioned equalizing feature are to determine like this, make (lt/S0)＞(16n/ π) set up, wherein l represents the length of above-mentioned lane device, S0 represents the cross-sectional area of above-mentioned lane device, and t represents the height of above-mentioned cavity, and n represents the number of above-mentioned equalizing feature along the cavity of circumference separation.
10. equalizing feature that is used in the washing machine, washing machine comprise that a bottom centre position is equipped with the interior bucket of impeller, its inside be equipped with above-mentioned in the outer bucket of bucket, and support the outside framework of above-mentioned outer bucket by suspending rod,
Above-mentioned equalizing feature comprises a cavity ring that is installed in above-mentioned interior bucket upper, open end, the inner space of above-mentioned cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, be sealed in the liquid in the above-mentioned cavity, and the lane device that allows aforesaid liquid between above-mentioned cavity, to flow;
Wherein, the rotary speed of bucket reaches before the critical speed in above-mentioned, and the change of the Free Surface of the aforesaid liquid that the rotation by bucket in above-mentioned produces makes above-mentioned lane device suppress aforesaid liquid flowing between above-mentioned cavity.
11. an equalizing feature that is used in the washing machine, washing machine comprise that a bottom centre position is equipped with the interior bucket of impeller, its inside be equipped with above-mentioned in the outer bucket of bucket, and support the outside framework of above-mentioned outer bucket by suspending rod,
Above-mentioned equalizing feature comprises a cavity ring that is installed in above-mentioned interior bucket upper, open end, the inner space of above-mentioned cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, be sealed in the liquid in the above-mentioned cavity, and the lane device that allows aforesaid liquid between above-mentioned space, to flow;
Wherein, above-mentioned lane device comprises a second channel, has only when bucket remains static in above-mentioned, and second channel just allows aforesaid liquid to flow in above-mentioned cavity; The bucket rotary speed surpasses after the critical speed in above-mentioned, and first passage just allows aforesaid liquid to flow between above-mentioned cavity.
12. a kind of equalizing feature according to claim 11 is characterized in that, above-mentioned first passage and above-mentioned second channel link together.
13. an equalizing feature that is used in the washing machine, washing machine comprise that a bottom centre position is equipped with the interior bucket of impeller, its inside be equipped with above-mentioned in the outer bucket of bucket, and support the outside framework of above-mentioned outer bucket by suspending rod,
Above-mentioned equalizing feature comprises a cavity ring that is installed in above-mentioned interior bucket upper, open end, the inner space of above-mentioned cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, be sealed in the liquid in the above-mentioned cavity, and the lane device that allows aforesaid liquid between above-mentioned cavity, to flow;
Wherein, above-mentioned lane device comprises a first passage and a second channel, the zone of bucket (3) vertical direction of the Free Surface (21b) of aforesaid liquid (13) when remaining static in above-mentioned, first passage (16a) and the Free Surface (21a) that is obtained when the rotary speed of bucket (3) surpasses critical speed in above-mentioned contact, and than above-mentioned Free Surface (21a) more close above-mentioned in the rotating shaft of bucket (3); Second channel (16b) is arranged on the zone of above-mentioned Free Surface (21b) vertical direction, (21b) contacts with above-mentioned Free Surface, and the more close above-mentioned rotating shaft of Free Surface (21) of the aforesaid liquid (13) that obtains when being in specified rotary speed than bucket (3) in above-mentioned.
14. a kind of equalizing feature according to claim 13 is characterized in that, above-mentioned first passage and above-mentioned second channel link together.
15. a kind of equalizing feature according to claim 13, it is characterized in that, above-mentioned lane device and above-mentioned equalizing feature are to determine like this, make (lt/S0)＞(16n/ π) set up, wherein l represents the length of above-mentioned lane device, S0 represents the cross-sectional area of above-mentioned lane device, and t represents the height of above-mentioned cavity, and n represents the number of above-mentioned equalizing feature along the cavity of circumference separation.
16. an equalizing feature that is used in the washing machine, washing machine comprise that a bottom centre position is equipped with the interior bucket of impeller, its inside be equipped with above-mentioned in the outer bucket of bucket, and support the outside framework of above-mentioned outer bucket by suspending rod,
Above-mentioned equalizing feature comprises a cavity ring that is installed in above-mentioned interior bucket upper, open end, the inner space of above-mentioned cavity ring is separated into the dividing plate of a plurality of cavitys along circumference, be sealed in the liquid in the above-mentioned cavity, and the lane device that allows aforesaid liquid between above-mentioned cavity, to flow;
Wherein, above-mentioned lane device comprises a first passage and second channel, first passage (16a) is arranged on the zone of above-mentioned interior bucket (3) vertical direction of the Free Surface (21b) of aforesaid liquid when remaining static, surpass the Free Surface (21a) of the aforesaid liquid (13) that critical speed obtained with respect to the rotary speed of bucket (3) in above-mentioned, this passage (16a) be in above-mentioned in the opposite direction of rotating shaft of bucket (3); The zone that is arranged on above-mentioned Free Surface (21b) vertical direction of second channel (16b), (21b) contacts with above-mentioned Free Surface, the more close above-mentioned rotating shaft of Free Surface (21) of the aforesaid liquid (13) that this zone obtains when being in specified rotary speed than bucket (3) in above-mentioned.
17. a kind of equalizing feature according to claim 16 is characterized in that, above-mentioned first passage and above-mentioned second channel link together.
18. a kind of equalizing feature according to claim 16, it is characterized in that, above-mentioned lane device and above-mentioned equalizing feature are to determine like this, make (lt/S0)＞(16n/ π) set up, wherein l represents the length of above-mentioned lane device, S0 represents the cross-sectional area of above-mentioned lane device, and t represents the height of above-mentioned cavity, and n represents the number of above-mentioned equalizing feature along the cavity of circumference separation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP048275/94 | 1994-03-18 | ||
| JP048275/1994 | 1994-03-18 | ||
| JP4827594 | 1994-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1126257A true CN1126257A (en) | 1996-07-10 |
| CN1074068C CN1074068C (en) | 2001-10-31 |
Family
ID=12798895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95103541A Expired - Fee Related CN1074068C (en) | 1994-03-18 | 1995-03-17 | Washing machine and balance member |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR0175118B1 (en) |
| CN (1) | CN1074068C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085753C (en) * | 1995-05-30 | 2002-05-29 | 株式会社日立制作所 | Washing machine |
| CN1091187C (en) * | 1996-05-23 | 2002-09-18 | 三星电子株式会社 | Ball balancer for washing machine |
| CN1091817C (en) * | 1996-05-30 | 2002-10-02 | 三星电子株式会社 | Balancing device for drum washing machine |
| CN1093578C (en) * | 1996-05-11 | 2002-10-30 | 三星电子株式会社 | Drum washing machine |
| CN1095897C (en) * | 1996-05-30 | 2002-12-11 | 三星电子株式会社 | Balancing device for drum washing machine |
| CN102341539A (en) * | 2009-03-09 | 2012-02-01 | 松下电器产业株式会社 | Washing machine |
| CN103233341A (en) * | 2013-05-09 | 2013-08-07 | 合肥荣事达洗衣设备制造有限公司 | Three-channel balancing ring |
| CN107429465A (en) * | 2015-03-26 | 2017-12-01 | 松下知识产权经营株式会社 | Washing machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100332761B1 (en) * | 1998-12-26 | 2002-09-17 | 엘지전자주식회사 | Vibration Reduction Device for Fully Automatic Washing Machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1056736A (en) * | 1975-04-18 | 1979-06-19 | Gentaro Hayashi | Balancing construction for centrifugal extractor |
| JPS5351671A (en) * | 1976-10-20 | 1978-05-11 | Hitachi Ltd | Drum type washing machine |
| JPS6022215B2 (en) * | 1978-05-09 | 1985-05-31 | ブラザー工業株式会社 | How to make a balance ring |
| JPS56148391A (en) * | 1980-04-18 | 1981-11-17 | Tokyo Shibaura Electric Co | Balancer device for hydroextractor |
| JPS59183846A (en) * | 1983-03-31 | 1984-10-19 | Toshiba Corp | Balancer for centrifugal rotary machine |
-
1995
- 1995-03-17 KR KR1019950005571A patent/KR0175118B1/en not_active IP Right Cessation
- 1995-03-17 CN CN95103541A patent/CN1074068C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085753C (en) * | 1995-05-30 | 2002-05-29 | 株式会社日立制作所 | Washing machine |
| CN1093578C (en) * | 1996-05-11 | 2002-10-30 | 三星电子株式会社 | Drum washing machine |
| CN1091187C (en) * | 1996-05-23 | 2002-09-18 | 三星电子株式会社 | Ball balancer for washing machine |
| CN1091817C (en) * | 1996-05-30 | 2002-10-02 | 三星电子株式会社 | Balancing device for drum washing machine |
| CN1095897C (en) * | 1996-05-30 | 2002-12-11 | 三星电子株式会社 | Balancing device for drum washing machine |
| CN102341539A (en) * | 2009-03-09 | 2012-02-01 | 松下电器产业株式会社 | Washing machine |
| CN102341539B (en) * | 2009-03-09 | 2013-03-20 | 松下电器产业株式会社 | Washing machine |
| CN103233341A (en) * | 2013-05-09 | 2013-08-07 | 合肥荣事达洗衣设备制造有限公司 | Three-channel balancing ring |
| CN107429465A (en) * | 2015-03-26 | 2017-12-01 | 松下知识产权经营株式会社 | Washing machine |
| CN110747601A (en) * | 2015-03-26 | 2020-02-04 | 松下知识产权经营株式会社 | Washing machine |
| CN107429465B (en) * | 2015-03-26 | 2020-06-30 | 松下知识产权经营株式会社 | Washing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1074068C (en) | 2001-10-31 |
| KR950027082A (en) | 1995-10-16 |
| KR0175118B1 (en) | 1999-05-01 |
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