WASHING MACHINE
In a washing machine, vibration of a cabinet vibrated by a tub is offset by a dynamic vibration absorber. Therefore, vibration of the cabinet is reduced and thus noise of the washing machine is reduced.
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The present invention relates to a washing machine, and more particularly, to a washing machine for reducing a vibration generating while operating the washing machine.
BACKGROUND ARTIn a conventional washing machine, as a drum rotates, a tub has a tendency to rotate in a rotating direction of the drum. Therefore, the tub vibrates by a vibration or an eccentricity. Referring to
The side cabinet 16 has a natural frequency according to a shape and rigidity. If a frequency of a vibration generating by a rotation of a drum (not shown) approaches the natural frequency, a vibration of the side cabinet 16 causes a large vibration, whereby noise is generated. Therefore, the vibration of the side cabinet 16 hinders stability of a product and generates noise.
DISCLOSURE OF INVENTION Technical ProblemThe present invention has been made in an effort to solve the above problems, and the present invention provides a washing machine for reducing a vibration generating while operating the same.
According to an aspect of the present invention, there is provided a washing machine including: a cabinet; a tub provided within the cabinet and for storing washing water; and a dynamic vibration absorber whose one end is fixed to the cabinet and whose the other end forms a free end and for offsetting a vibration of the cabinet vibrated by a vibration of the tub.
Technical SolutionThe dynamic vibration absorber may include a vibration member whose one end is fixed to the inside of the cabinet and whose the other end is extended to the inside of the cabinet. The other end of the vibration member may be extended to the downside of the inside of the cabinet. The dynamic vibration absorber may further include a mass member having a predetermined mass and coupled to the vibration member.
The cabinet may include a side cabinet for defining the side of space in which the tub is disposed.
The dynamic vibration absorber may have a natural frequency substantially identical to a natural frequency of the side cabinet.
When the side cabinet has a plurality of natural vibration modes, a plurality of dynamic vibration absorbers may be disposed.
The plurality of dynamic vibration absorbers may have natural frequencies corresponding to a plurality of natural vibration modes of the side cabinet.
The washing machine may further include a reinforcement member disposed at the inside of the side cabinet and for reinforcing rigidity of the side cabinet.
The dynamic vibration absorber may damp a vibration of the cabinet by vibrating in a phase opposite to a vibration phase of the cabinet.
Advantageous EffectsThe washing machine according to the present invention has the following effect.
First, because a portion of vibration energy to vibrate the cabinet is used to vibrate the dynamic vibration absorber, a vibration and noise of the cabinet reduce.
Second, when the dynamic vibration absorber vibrates in a phase opposite to a vibration phase of the cabinet, vibrations are offset to each other, so that a vibration and noise of the cabinet further reduce.
Third, because the dynamic vibration absorber can change a resonance frequency of the cabinet to the outside of an operation frequency range of the washing machine, a resonance phenomenon may not be generated while operating the washing machine.
Fourth, because a vibration of the cabinet reduces, a vibration transmitted to a base of the cabinet reduces. Therefore, in a floor surface in which the washing machine is provided, a vibration and noise reduce, whereby stability and reliability of a product are improved.
A washing machine according to the present invention includes all appliances that can process the laundry such as a simple washing machine, a drying machine, and a dehydrator. Hereinafter, as an example of the washing machine, the simple washing machine is described in detail.
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When the dynamic vibration absorber 120 vibrates, the dynamic vibration absorber 120 may cause noise by contacting with parts of the inside of the washing machine 100 or the side cabinet 116. However, referring to
An operation of the washing machine 100 of
If the washing machine 100 operates, the drum 103 rotates, and according to a rotation of the drum 103, the tub 102 vibrates, and the vibration is transmitted to the side cabinet 116 through the spring 105. As the side cabinet 116 vibrates, the dynamic vibration absorber 120 coupled to the upside of the side cabinet 116 vibrates. However, as shown in
However, in the washing machine 100 according to the present exemplary embodiment, as the dynamic vibration absorber 120 vibrates in a phase opposite to a vibration direction of the side cabinet 116, vibration energy to vibrate the side cabinet 116 is used to vibrate the dynamic vibration absorber 120. Therefore, an entire vibration of the washing machine 100 is damped. This is described in detail as follows. The dynamic vibration absorber 120 changes a resonance frequency of the washing machine 100. That is, as the dynamic vibration absorber 120 changes the resonance frequency to the outside of an operation vibration frequency range of the motor (not shown), a resonance phenomenon generating while operating the washing machine is prevented.
The side cabinet 116 has one natural vibration mode. However, the side cabinet 116 may have a plurality of different natural vibration modes. In this case, if a plurality of dynamic vibration absorbers is provided in the side cabinet 116 and has natural frequencies corresponding to the plurality of natural vibration modes, a plurality of resonance phenomena generating while operating the washing machine can be effectively reduced.
The embodiment of the invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
INDUSTRIAL APPLICABILITYBy providing a dynamic vibration absorber in a washing machine according to the present invention, a vibration of the washing machine can be reduced.
Claims
1. A washing machine comprising:
- a cabinet;
- a tub provided within the cabinet and for storing washing water; and
- a dynamic vibration absorber whose one end is fixed to the cabinet and whose the other end forms a free end and for offsetting a vibration of the cabinet vibrated by a vibration of the tub.
2. The washing machine of claim 1, wherein the dynamic vibration absorber comprises a vibration member whose one end is fixed to the inside of the cabinet and whose the other end is extended to the inside of the cabinet.
3. The washing machine of claim 2, wherein the other end of the vibration member is extended to the downside of the inside of the cabinet.
4. The washing machine of claim 2, wherein the dynamic vibration absorber further comprises a mass member having a predetermined mass and coupled to the vibration member.
5. The washing machine of claim 1, wherein the cabinet comprises a side cabinet for defining the side of space in which the tub is disposed.
6. The washing machine of claim 5, wherein the dynamic vibration absorber has a natural frequency substantially identical to a natural frequency of the side cabinet.
7. The washing machine of claim 1, wherein the other end of the dynamic vibration absorber is separated from the cabinet so that the dynamic vibration absorber does not contact with the cabinet, when the dynamic vibration absorber vibrates.
8. The washing machine of claim 5, wherein when the side cabinet has a plurality of natural vibration modes, a plurality of dynamic vibration absorbers is disposed.
9. The washing machine of claim 8, wherein the plurality of dynamic vibration absorbers has natural frequencies corresponding to a plurality of natural vibration modes of the side cabinet.
10. The washing machine of claim 5, further comprising a reinforcement member disposed at the inside of the side cabinet and for reinforcing rigidity of the side cabinet.
11. The washing machine of claim 10, wherein the dynamic vibration absorber comprises:
- a vibration member whose one end is coupled to the reinforcement member and whose the other end forms a free end extended to the downside of the inside of the cabinet; and
- a mass member having a predetermined mass and coupled to the vibration member,
- wherein the dynamic vibration absorber damps a vibration of the side cabinet by vibrating in a phase opposite to a vibration phase of the side cabinet.
12. The washing machine of claim 1, wherein the dynamic vibration absorber damps a vibration of the cabinet by vibrating in a phase opposite to a vibration phase of the cabinet.
Type: Application
Filed: Nov 9, 2007
Publication Date: Feb 18, 2010
Applicant: LG Electronics Inc. (Seoul)
Inventor: Kyung Seop Hong (Seoul)
Application Number: 12/514,218
International Classification: D06F 35/00 (20060101);