CN206219833U - Drum washing machine - Google Patents

Drum washing machine Download PDF

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Publication number
CN206219833U
CN206219833U CN201621238094.7U CN201621238094U CN206219833U CN 206219833 U CN206219833 U CN 206219833U CN 201621238094 U CN201621238094 U CN 201621238094U CN 206219833 U CN206219833 U CN 206219833U
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CN
China
Prior art keywords
magnetic
inner cylinder
washing machine
winding
housing
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Active
Application number
CN201621238094.7U
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Chinese (zh)
Inventor
戴彪
张大龙
杨坚
宋爱
程海松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201621238094.7U priority Critical patent/CN206219833U/en
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Abstract

The utility model provides a drum washing machine. The drum washing machine comprises a shell, and an outer drum and an inner drum which are arranged in the shell, wherein the inner drum is rotatably arranged in the outer drum. The drum washing machine further comprises a magnetic body and a suspension winding, the magnetic body is arranged on the inner drum, the suspension winding is arranged on the shell, and the suspension winding is used for generating a first magnetic field to act on the magnetic body so as to enable the inner drum to suspend. When the magnetic suspension device is used, the suspension winding is connected with a power supply, so that the suspension winding generates a first magnetic field. The first magnetic field acts on the magnetic body, and the magnetic body supports the inner barrel to enable the inner barrel to be suspended. When the inner cylinder rotates, the balance of the inner cylinder is adjusted by adjusting the magnetic field of the suspension winding. Therefore, the parts such as a damping spring, a damping counterweight and the like are omitted, and the mass of the drum washing machine is reduced. On the other hand, the damping spring is saved, so that the problem that the damping spring is easy to damage when the roller washing piece is used for a long time can be avoided.

Description

Roller washing machine
Technical field
The utility model is related to washing machine technology field, in particular to a kind of roller washing machine.
Background technology
According to the difference of laundry principle, washing machine can be divided into impeller-type, three kinds of washing machines of stirring-type and drum-type.And roll Drum washing machine is by its unique advantage (clean than high, water consumption and power consumption are minimum) just increasingly by the green grass or young crops of family of China Look at.Roller washing machine rises in Europe, and clothes washing method is to imitate rod hammering to beat clothing principle design.Roller washing machine is by stainless Bucket in steel, mechanical programmed controller is used for by phosphatization, electrophoresis, the shell for spraying triple protection, and some heavy cement blocks The huge centrifugal force that balancing drum is produced when rotating does repeating motion, and the collective effect for adding washing powder and water does clothes washing Only.
The washing tube of roller washing machine is generally that horizontal type level is set, and spatially vertical up and down is made around trunnion axis during work Body is turned round.Barycenter is ceaselessly pumping relative to certain level face, so, except the eccentric vibration for causing of unloading The outer factor for being also contemplated that acceleration of gravity.The method for using (is hung in the corner wall of cabinet for the method for dynamic equilibrium with four Bar balances eccentric load), the method for rigid balancing is (on outer barrel plus balancing weight, increase are hung oneself the outstanding of spring and lower Damper Braces Hang device) vibration of casing is delivered to from outer barrel to reduce.
At present, inner tank of washing machine type of drive on the market is mainly belt pulley drive, gear driven, three kinds of electric-machine directly-driven Mode, all hangs damping spring, damping counterweight, to increase inner cylinder stability when rotated on inner cylinder.
Above-mentioned washing machine is due to damping spring, the presence of damping counterweight so that the quality of washing machine is very big, is not easy to move It is dynamic to carry, while part damping spring during long-time use of doing washing also is easily damaged.
Utility model content
Main purpose of the present utility model is to provide a kind of roller washing machine, to solve roller washing machine in the prior art Quality it is excessive be not easy to carry problem.
To achieve these goals, the utility model provides a kind of roller washing machine, including housing and is arranged on housing Interior outer barrel and inner cylinder, inner cylinder is installed in rotation in outer barrel, and roller washing machine also includes magnetic and suspending windings, magnetic Body is arranged on inner cylinder;Suspending windings are arranged on outer barrel and/or housing, and suspending windings are used to produce the first magnetic fields in magnetic Allowing inner cylinder to suspend on gonosome.
Further, roller washing machine also includes rotating winding, rotates winding and is arranged on outer barrel and/or housing, rotates Winding is used to produce the second magnetic fields on magnetic to allow inner cylinder to rotate.
Further, one end of inner cylinder forms entrance, and the other end relative with entrance of inner cylinder is formed with the first installation portion, Magnetic includes the first magnetic, and the first magnetic is arranged on the first installation portion, and institute's suspending windings include the first suspending windings, First suspending windings are arranged on position corresponding with the first installation portion on housing.
Further, rotating winding includes that first rotates winding, and first rotates winding installs on housing with first The corresponding position in portion.
Further, porch is formed with the second installation portion, and magnetic also includes the second magnetic, and the second magnetic is installed On the second installation portion, suspending windings include the second suspending windings, and the second suspending windings are arranged on housing and the second installation portion Corresponding position.
Further, rotating winding also includes that second rotates winding, and second rotates winding is arranged on housing and the second peace The corresponding position in dress portion.
Further, winding installation portion is formed with housing, suspending windings and/or rotation winding are arranged on winding installation portion On.
Further, winding installation portion is multiple, and multiple winding installation portions are set at intervals in the circumference of housing.
Further, magnetic is multiple, and multiple magnetics are arranged on inner cylinder at intervals.
Further, inner cylinder is arranged on outer barrel by bearing.
Using the technical solution of the utility model, when in use, suspending windings are switched on power, allow suspending windings to produce the One magnetic field.First magnetic fields magnetic, magnetic holds up inner cylinder so that inner cylinder suspends.It is outstanding by adjustment when inner cylinder is rotated The magnetic field of winding is floated to adjust the balance of inner cylinder.So the parts such as damping spring, damping counterweight are just eliminated, rolling is reduced The quality of cylinder washing machine.On the other hand, due to eliminating damping spring, also it is avoided that the mistake that laundry drum part is used in long-time The problem that damping spring is easily damaged in journey.
In addition to objects, features and advantages described above, the utility model also has other purposes, feature and excellent Point.Below with reference to figure, the utility model is described in further detail.
Brief description of the drawings
The Figure of description for constituting a part of the present utility model is used for providing being further understood to of the present utility model, this The schematic description and description of utility model is used to explain the utility model, does not constitute to improper limit of the present utility model It is fixed.In the accompanying drawings:
Fig. 1 shows the schematic side view of the embodiment one according to roller washing machine of the present utility model;And
Fig. 2 shows the schematic front view of the embodiment one of the roller washing machine of Fig. 1.
Wherein, above-mentioned accompanying drawing is marked including the following drawings:
10th, housing;11st, winding installation portion;20th, outer barrel;30th, inner cylinder;31st, entrance;32nd, the first installation portion;33rd, the second peace Dress portion;40th, magnetic;50th, suspending windings;60th, winding is rotated;70th, bearing.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can To be mutually combined.Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order that those skilled in the art more fully understand the utility model scheme, below in conjunction with the utility model reality The accompanying drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described Embodiment is only the embodiment of the utility model part, rather than whole embodiments.Based on the reality in the utility model Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all should When the scope for belonging to the utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing, " second " etc. is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so The term for using can be exchanged in the appropriate case, so as to embodiment of the present utility model described herein.Additionally, term " bag Include " and " having " and their any deformation, it is intended that covering is non-exclusive to be included, for example, containing series of steps Or the process of unit, method, system, product or equipment are not necessarily limited to those steps or the unit clearly listed, but can wrap Include not listing clearly or for these processes, method, product or other intrinsic steps of equipment or unit.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative Be also intended to include plural form, additionally, it should be understood that, when in this manual use term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Unless specifically stated otherwise, the part and positioned opposite, the digital table of step for otherwise illustrating in these embodiments Scope of the present utility model is not limited up to formula and numerical value.Simultaneously, it should be appreciated that each shown in accompanying drawing for the ease of description The size of individual part is not to be drawn according to actual proportionate relationship.For skill known to person of ordinary skill in the relevant Art, method and apparatus may be not discussed in detail, but in the appropriate case, the technology, method and apparatus should be considered as awarding Weigh a part for specification.In all examples shown here and discussion, any occurrence should be construed as merely example Property, not as limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that:It is similar Label and letter similar terms is represented in following accompanying drawing, therefore, once be defined in a certain Xiang Yi accompanying drawing, then with It need not be further discussed in accompanying drawing afterwards.
For the ease of description, space relative terms can be used herein, such as " ... on ", " ... top ", " in ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation levied.It should be appreciated that space relative terms are intended to comprising the orientation except device described in figure Outside different azimuth in use or operation.If for example, the device in accompanying drawing is squeezed, be described as " in other devices To be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction " Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and " in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and And respective explanations are made to the relative description in space used herein above.
In description of the present utility model, it is to be understood that the noun of locality such as " forward and backward, upper and lower, left and right ", " laterally, Vertically, vertically, level " and the indicated orientation such as " top, bottom " or position relationship be normally based on orientation shown in the drawings or position Relation is put, description the utility model is for only for ease of and is simplified description, in the case where opposite explanation is not made, these nouns of locality Do not indicate that and imply that the device or element of meaning there must be specific orientation or with specific azimuth configuration and operation, because This is it is not intended that limitation to the utility model protection domain;The noun of locality " inside and outside " refers to the wheel relative to each part in itself Wide is inside and outside.
Figures 1 and 2 show that the embodiment one of roller washing machine of the present utility model, the roller washing machine includes housing 10 And outer barrel 20 and inner cylinder 30 in housing 10 are arranged on, inner cylinder 30 is installed in rotation in outer barrel 20.Roller washing machine is also wrapped Include magnetic 40 and suspending windings 50, magnetic 40 is arranged on inner cylinder 30, suspending windings 50 are installed on the housing 10, suspend around Group 50 is used to produce the first magnetic fields on magnetic 40 to allow inner cylinder 30 to suspend.
When in use, suspending windings 50 are switched on power, allows suspending windings 50 to produce the first magnetic field.First magnetic fields magnetic Gonosome 40, magnetic 40 holds up inner cylinder 30 so that inner cylinder 30 suspends.When inner cylinder 30 is rotated, by adjusting suspending windings 50 Magnetic field adjusts the balance of inner cylinder 30.So the parts such as damping spring, damping counterweight are just eliminated, laundry drum is reduced The quality of machine.On the other hand, due to eliminating damping spring, also it is avoided that laundry drum part subtracts during long-time use The problem that shake spring is easily damaged.
As shown in figure 1, in the technical scheme of embodiment one, roller washing machine also includes rotating winding 60, rotates winding 60 install on the housing 10, and rotating after winding 60 is powered can produce the second magnetic field.Second magnetic fields in magnetic 40, to drive Inner cylinder 30 is rotated.So, the second magnetic field that winding 60 is produced is rotated by adjusting, the band of magnetic 40 that can also be allowed on inner cylinder 30 Dynamic inner cylinder 30 is rotated.When using, suspending windings 50 are adjusted respectively and winding 60 is rotated, allow the first magnetic field and the second magnetic field to synthesize One entirety, by studying the coupling condition of rotating torques and suspending power, seeks decoupling method, realizes independent control inner cylinder 30 Rotation and the stable suspersion of inner cylinder 30.
As shown in Fig. 2 one end of inner cylinder 30 forms entrance 31, the other end relative with entrance 31 of inner cylinder 30 is formed with the One installation portion 32.Magnetic 40 includes the first magnetic, and the first magnetic is arranged on the first installation portion 32.Institute's suspending windings 50 Including the first suspending windings, the first suspending windings install position corresponding with the first installation portion 32 on the housing 10.First hangs Floating winding is used to produce the first magnetic fields in the first magnetic on the first installation portion 32, to allow the first magnetic to hold up inner cylinder 30, it is allowed to suspend.
In the technical scheme of embodiment one, the first magnetic is arranged on the outer circumferential of the first installation portion 32, and first hangs Floating winding is arranged on the circumferential inner side on housing.
Used as a kind of optional implementation method, the first magnetic can also be arranged on the circumferential inner side of the first installation portion 32.
Used as a kind of optional implementation method, the first suspending windings can also be arranged on the outer circumferential of housing.
As shown in Fig. 2 rotating winding 60 includes that first rotates winding, first rotates winding installs on the housing 10 with first The corresponding position of installation portion 32.First rotates winding is used to produce the second magnetic field, and the second magnetic fields are in the first installation portion 32 On the first magnetic, with allow the first magnetic drive inner cylinder 30 rotate.
In the technical scheme of embodiment one, first rotates winding is arranged on the circumferential inner side of housing.
Used as a kind of optional implementation method, first rotates winding can also be arranged on the outer circumferential of housing.
As shown in Fig. 2 in the technical scheme of embodiment one, the second installation portion 33, magnetic 40 are formed with entrance 31 Also include the second magnetic, the second magnetic is arranged on the second installation portion 33.Suspending windings 50 include the second suspending windings, the Two suspending windings install position corresponding with the second installation portion 33 on the housing 10.Second suspending windings are used to produce the first magnetic , the first magnetic fields allow the second magnetic to hold up inner cylinder 30 in the second magnetic on the second installation portion 33, are allowed to suspend.
In the technical scheme of embodiment one, the second magnetic is arranged on the outer circumferential of the second installation portion 33, and second hangs Floating winding installs circumferential inner side on the housing 10.
Used as a kind of optional implementation method, the second magnetic can also be arranged on the circumferential inner side of the second installation portion 33, Or in embedded second installation portion 33.
Used as a kind of optional implementation method, the second suspending windings can also be arranged on the outer circumferential of housing.
As shown in Fig. 2 in the technical scheme of embodiment one, rotating winding 60 also includes that second rotates winding, second turn Dynamic winding installs position corresponding with the second installation portion 33 on the housing 10.Second rotates winding is used to produce the second magnetic field, Second magnetic fields in the second magnetic on the second installation portion 33, to allow the second magnetic to drive inner cylinder 30 to rotate.
In the technical scheme of embodiment one, by the first suspending windings and the second suspending windings to the two ends reality of inner cylinder 30 Existing magnetic suspension support, can allow the more stable suspension of inner cylinder 30.Meanwhile, rotate winding using first and the second rotation winding can More effectively to drive inner cylinder 30 to rotate, increase the power of roller washing machine.
As shown in figure 1, be formed with winding installation portion 11 on housing 10, suspending windings 50 and rotate winding 60 be installed in around On group installation portion 11.
As a kind of optional implementation method, it is also possible to only suspending windings 50 are arranged on winding installation portion 11, and incite somebody to action Other positions that winding 60 installs housing 10 are rotated, or, it is also possible to will only rotate winding 60 and be arranged on winding installation portion 11, And suspending windings 50 are installed other positions of housing 10.
As shown in figure 1, winding installation portion 11 for multiple, multiple winding installation portions 11 in the circumference of housing 10 at intervals Set.As one kind preferred embodiment, set at equal intervals between multiple winding installation portions 11.
As shown in figure 1, in the scheme of embodiment one, magnetic 40 is multiple, multiple magnetics 40 are installed at intervals On inner cylinder 30.As one kind preferred embodiment, multiple magnetics 40 equally spacedly set on the outer circumferential of inner cylinder 30 Put.In addition, used as a kind of optional implementation method, magnetic 40 can also be equally spacedly embedded on inner cylinder 30.
As shown in Fig. 2 inner cylinder 30 is arranged on outer barrel 20 by bearing 70, rotated relative to outer barrel 20 with reducing inner cylinder 30 When frictional force.
Roller washing machine of the present utility model also includes a kind of embodiment two, in the embodiment two not shown in figure, should Roller washing machine includes housing 10 and the outer barrel 20 and inner cylinder 30 that are arranged in housing 10, and inner cylinder 30 is installed in rotation on outer barrel In 20.Roller washing machine also includes magnetic 40 and suspending windings 50, and magnetic 40 is arranged on inner cylinder 30, and suspending windings 50 are pacified On outer barrel 20, suspending windings 50 are used to produce the first magnetic fields on magnetic 40 to allow inner cylinder 30 to suspend.Embodiment The difference of two technical scheme and the technical scheme of embodiment one is with suspending windings 50 are arranged on outer barrel 20.
Likewise, after suspending windings 50 are switched on power, allowing suspending windings 50 to produce the first magnetic field.First magnetic fields magnetic Gonosome 40, magnetic 40 holds up inner cylinder 30 so that inner cylinder 30 suspends.When inner cylinder 30 is rotated, by adjusting suspending windings 50 Magnetic field adjusts the balance of inner cylinder 30.So the parts such as damping spring, damping counterweight are just eliminated, laundry drum is reduced The quality of machine.
In embodiment two, roller washing machine also includes rotating winding 60, rotates winding 60 and is arranged on outer barrel 20.Equally , rotating after winding 60 is powered can produce the second magnetic field.Second magnetic fields in magnetic 40, to drive inner cylinder 30 to rotate.This Sample, the second magnetic field that winding 60 is produced is rotated by adjusting, and the magnetic 40 that can also be allowed on inner cylinder 30 drives inner cylinder 30 to rotate. When using, suspending windings 50 are adjusted respectively and winding 60 is rotated, allow the first magnetic field and the second magnetic field to synthesize an entirety, pass through The coupling condition of research rotating torques and suspending power, seeks decoupling method, realizes rotation and the inner cylinder 30 of independent control inner cylinder 30 Stable suspersion.
Roller washing machine of the present utility model also includes a kind of embodiment three, in the embodiment three not shown in figure, should Roller washing machine includes housing 10 and the outer barrel 20 and inner cylinder 30 that are arranged in housing 10, and inner cylinder 30 is installed in rotation on outer barrel In 20.Roller washing machine also includes magnetic 40 and suspending windings 50, and magnetic 40 is arranged on inner cylinder 30, and suspending windings 50 are pacified On outer barrel 20 and housing 10, suspending windings 50 are used to produce the first magnetic fields on magnetic 40 to allow inner cylinder 30 to hang It is floating.The difference of the technical scheme of embodiment two and the technical scheme of embodiment one is with suspending windings 50 are installed outside simultaneously On cylinder 20 and housing 10.
Likewise, after suspending windings 50 are switched on power, allowing suspending windings 50 to produce the first magnetic field.First magnetic fields magnetic Gonosome 40, magnetic 40 holds up inner cylinder 30 so that inner cylinder 30 suspends.When inner cylinder 30 is rotated, by adjusting suspending windings 50 Magnetic field adjusts the balance of inner cylinder 30.So the parts such as damping spring, damping counterweight are just eliminated, laundry drum is reduced The quality of machine.
In embodiment three, roller washing machine also includes rotating winding 60, rotates winding 60 and is arranged on outer barrel 20 and housing On 10.Likewise, rotating after winding 60 is powered, the second magnetic field can be produced.Second magnetic fields in magnetic 40, to drive inner cylinder 30 rotate.So, the second magnetic field that winding 60 is produced is rotated by adjusting, in the magnetic 40 that can also be allowed on inner cylinder 30 drives Cylinder 30 is rotated.When using, suspending windings 50 are adjusted respectively and winding 60 is rotated, allow the first magnetic field and the second magnetic field to synthesize one It is overall, by studying the coupling condition of rotating torques and suspending power, seek decoupling method, realize the rotation of independent control inner cylinder 30 With the stable suspersion of inner cylinder 30.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.

Claims (10)

1. a kind of roller washing machine, including housing (10) and the outer barrel (20) and inner cylinder (30) that are arranged in the housing (10), The inner cylinder (30) is installed in rotation in the outer barrel (20), it is characterised in that the roller washing machine also includes:
Magnetic (40), on the inner cylinder (30);
Suspending windings (50), on the outer barrel (20) and/or the housing (10), the suspending windings (50) are for producing The first magnetic fields are given birth on the magnetic (40) to allow the inner cylinder (30) to suspend.
2. roller washing machine according to claim 1, it is characterised in that the roller washing machine also includes:
Winding (60) is rotated, on the outer barrel (20) and/or the housing (10), rotation winding (60) is for producing The second magnetic fields are given birth on the magnetic (40) to allow the inner cylinder (30) to rotate.
3. roller washing machine according to claim 2, it is characterised in that one end of the inner cylinder (30) forms entrance (31), the other end relative with the entrance (31) of the inner cylinder (30) is formed with the first installation portion (32), the magnetic (40) including the first magnetic, first magnetic is arranged on first installation portion (32), institute's suspending windings (50) bag The first suspending windings are included, first suspending windings are arranged on corresponding with first installation portion (32) on the housing (10) Position.
4. roller washing machine according to claim 3, it is characterised in that the rotation winding (60) including first rotate around Group, described first rotates winding is arranged on position corresponding with first installation portion (32) on the housing (10).
5. roller washing machine according to claim 4, it is characterised in that entrance (31) place is formed with the second installation portion (33), the magnetic (40) also includes the second magnetic, and second magnetic is arranged on second installation portion (33), The suspending windings (50) include the second suspending windings, and second suspending windings are arranged on the housing (10) and described the The corresponding position of two installation portions (33).
6. roller washing machine according to claim 5, it is characterised in that the rotation winding (60) also includes that second rotates Winding, described second rotates winding is arranged on position corresponding with second installation portion (33) on the housing (10).
7. roller washing machine according to claim 2, it is characterised in that be formed with winding installation portion on the housing (10) (11), the suspending windings (50) and/or rotation winding (60) are on the winding installation portion (11).
8. roller washing machine according to claim 7, it is characterised in that the winding installation portion (11) is multiple, it is multiple The winding installation portion (11) is set at intervals in the circumference of the housing (10).
9. roller washing machine according to claim 1, it is characterised in that the magnetic (40) is multiple, it is multiple described Magnetic (40) is arranged on the inner cylinder (30) at intervals.
10. roller washing machine according to claim 1, it is characterised in that the inner cylinder (30) is installed by bearing (70) On the outer barrel (20).
CN201621238094.7U 2016-11-18 2016-11-18 Drum washing machine Active CN206219833U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621238094.7U CN206219833U (en) 2016-11-18 2016-11-18 Drum washing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621238094.7U CN206219833U (en) 2016-11-18 2016-11-18 Drum washing machine

Publications (1)

Publication Number Publication Date
CN206219833U true CN206219833U (en) 2017-06-06

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ID=58789944

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621238094.7U Active CN206219833U (en) 2016-11-18 2016-11-18 Drum washing machine

Country Status (1)

Country Link
CN (1) CN206219833U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106702657A (en) * 2016-11-18 2017-05-24 珠海格力电器股份有限公司 Drum washing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106702657A (en) * 2016-11-18 2017-05-24 珠海格力电器股份有限公司 Drum washing machine
CN106702657B (en) * 2016-11-18 2023-07-14 珠海格力电器股份有限公司 Drum washing machine

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