KR100697014B1 - Damper of washing machine - Google Patents

Abstract

In the damper of the washing machine according to the present invention, any one of a cylinder and a piston is made of a combination of a magnetic body and a magnetic body and a conductor, and a permanent magnet is installed on the other side of the cylinder and the piston, so that the induction current formed by the permanent magnet during vibration of the tub The damping force of the damper in proportion to the amount of vibration of the tub is generated continuously, there is an advantage that can minimize the vibration / noise.

Washing machine, damper, cylinder, piston, magnetic material, conductor, permanent magnet, induction current

Description

Damper of washing machine

1 is an internal configuration of a washing machine according to the prior art,

2 is a partially cutaway perspective view of a washing machine according to the prior art,

3 is a longitudinal sectional view of an essential part of the damper shown in FIGS. 1 and 2;

4 is a longitudinal sectional view of an essential part of a damper first embodiment of a washing machine according to the present invention;

5 is an exploded perspective view of an essential part of a first embodiment of a washing machine damper according to the present invention;

6 is a longitudinal sectional view of an essential part of a damper second embodiment of a washing machine according to the present invention;

7 is a longitudinal sectional view of an essential part of a damper third embodiment of a washing machine according to the present invention;

8 is a longitudinal sectional view of an essential part of a damper fourth embodiment of a washing machine according to the present invention;

9 is a longitudinal sectional view of an essential part of a damper fifth embodiment of a washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

2: base 10: tub

20: damper 22: cylinder

23: cylinder holder 24: conductor

25: magnetic material 26,26 ': piston

27; Piston Holder 28: Magnetic Material

29: conductor 50,50 ′: permanent magnet

The present invention relates to a damper of a washing machine, and more particularly, to a damper of a washing machine in which any one of a cylinder and a piston includes a magnetic material and a permanent magnet is mounted on the other side of the cylinder and the piston.

In general, a washing machine uses washing water to remove contaminants on clothes, bedding, etc. (hereinafter referred to as 'foam') contained in a drum by using water and detergent (hereinafter referred to as 'washing water'). It is a device that cleans fabrics through rinsing and dehydration.

1 is an internal configuration diagram of a washing machine according to the prior art, Figure 2 is a partially cutaway perspective view of the washing machine according to the prior art.

1 and 2, the conventional washing machine is provided with a base 2, a cabinet 4 installed above the base 2, and a front door of the cabinet 4, 5) and a cabinet cover 7 having a door 6 for opening and closing the fabric access hole 5, a top cover 8 provided above the cabinet 4, and the cabinet 4 The tub 10 is installed so as to be located between the left and right side portions of the tub (10) containing the wash water, the drum (14) rotatably positioned inside the tub (10) to accommodate the laundry, and the drum (14). It is configured to include a motor 18 installed in the tub 10 to rotate.

The tub 10 is a circular cylinder lying on its side, and an opening hole is formed at the rear of the gun entrance hole, and a water supply device 11 for supplying washing water to the inside of the tub 10 is connected to the tub 10. The lower part is connected to the drainage device 12 for draining the wash water in the tub 10 to the outside.

The drum 14 is a circular cylinder lying on its side, and an opening hole is formed at the rear of the fabric access hole, a through hole 15 is formed to allow the wash water to enter and exit, and a lifter for flowing the fabric on the inner circumferential surface thereof. 16) is mounted.

The motor 18 is provided with a shaft 18a penetrating the tub 10 and connected to the rear side of the drum 14.

The tub 10 has a plurality of springs 19 are installed between the upper portion and the cabinet 4 to be cushioned by the plurality of springs 19, and a plurality of springs are disposed between the lower portion and the base 2. Two dampers 20 are installed to cushion the plurality of dampers 20.

3 is a longitudinal sectional view of an essential part of the damper shown in FIGS. 1 and 2.

As shown in FIGS. 1 to 3, the damper 20 has a cylinder 22 connected to one side of the base 2 and the tub 10, and the other side of the base 2 and the tub 10. It is composed of a piston 26 connected, and a friction ring 32 installed on one side of the cylinder 22 and the piston 26 and friction with the other side.

Hereinafter, the cylinder 22 is connected to the tub 10 and the piston 26 is connected to the base 2.

The cylinder 22 is a cylinder holder 23 is formed on one side is coupled by a pair of fixed end 13 and the hinge pin 13a formed in the tub 10, the other side is opened to the piston 26 ) Is inserted.

The piston 26 is a piston holder 27 is formed on one side is coupled by a pair of fixed end 3 and the hinge pin (3a) formed on the lower side of the base 2, the other side is the cylinder 22 Inserted therein, the tub 10 and the cylinder 22 vibrates linearly inside the cylinder 22 during vibration.

The friction ring 32 is attached to the end circumferential surface of the piston 26 inserted into the cylinder 22 to limit the movement of the tub 10 while friction with the inner wall of the cylinder 22, The vibration transmitted to the base 2 is reduced.

 An elastic member such as a sponge or rubber is used for the friction ring 32, and the damping force of the damper 20 varies according to its thickness, material, and quantity.

However, since the frictional force of the friction ring 32 has a single value, the damper 20 of the washing machine according to the related art has the same damping force against excessive vibration or normal vibration, and supports the tub 10 or There is a problem that limits come to reduce the vibration transmitted from the tub (10).

The present invention has been made in order to solve the above problems of the prior art, it is an object of the present invention to provide a damper of a washing machine that can minimize the vibration / noise by the continuous damping force proportional to the amount of vibration.

The damper of the washing machine according to the present invention for solving the above problems is a cylinder composed of a conductor and a magnetic layer; A piston having a portion inserted into the cylinder; It is characterized in that it comprises a permanent magnet installed in the piston to generate an induced current by interaction with the cylinder to form a damping force.

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The piston is characterized in that made of a magnetic material.

The damper of the washing machine according to the present invention includes a cylinder; A piston partially inserted into the cylinder, the piston comprising a layer of conductors and magnetic bodies; It is characterized in that it comprises a permanent magnet is installed in the cylinder to generate an induced current by interaction with the piston to form a damping force.

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The cylinder is characterized in that made of a magnetic material.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a longitudinal sectional view of the main part of the damper first embodiment of the washing machine according to the present invention, Figure 5 is an exploded perspective view of the main part of a first embodiment of the washing machine damper according to the present invention.

4 and 5, the damper of the washing machine according to the present embodiment includes: a cylinder 22 made of at least one of a conductor 24 and a magnetic body 25; A piston 26 partially inserted into the cylinder 22; It is configured to include a permanent magnet 50 installed in the piston 26 to generate an induced current by interaction with the cylinder 22 to form a damping force.

The cylinder 22 is connected to one side of the base 2 and the tub 10, the piston 26 is connected to the other side of the base 2 and the tub 10, hereinafter, the cylinder 22 Is connected to the tub 10 and the piston 26 is limited to being connected to the base 2 will be described.

The cylinder 22 may be made of only a conductor 24 such as aluminum or copper, or may be made of only a magnetic body 25 such as iron. Hereinafter, the cylinder 22 may be a combination of the conductor 24 and the magnetic body 25. The description will be limited.

The cylinder 22 has a conductor 24 attached to the inner surface of the magnetic body 25 so that the conductor 24 and the magnetic body 25 are positioned inside and outside to form a layer.

The magnetic body 25 is preferably made of any one of a ferromagnetic material and a paramagnetic material.

The cylinder 22 may be provided with a cylinder holder 23 in the magnetic body 25 so that the magnetic body 25 may be hinged to the tub 10 while forming the exterior of the cylinder 22. The magnetic body 25 is mounted in a separate cylinder member (not shown) and the cylinder holder 23 is provided in the separate cylinder member so that the cylinder member forms the appearance of the cylinder 22 to the tub 10. Of course, hinged connections are also applicable.

The piston 26 is partially inserted inside the conductor 24 such that a portion thereof is located inside the cylinder 22, in particular the conductor 24.

The piston 26 is preferably made of a magnetic material to minimize the magnetic resistance to increase the amount of magnetic flux generated in the permanent magnet 50.

The permanent magnet 50 is magnetized to the outer circumferential surface of the piston 26, in particular, the portion located inside the cylinder 22 so that the permanent magnet 50 can be located inside the conductor 24.

)으로 착자되는 것도 가능하고, 상기 피스톤(26)의 길이방향(z)으로 착자되는 것도 가능하며, 이하, 복수개가 원주 방향(

) 및 길이 방향(z)으로 착자되는 것으로 한정하여 설명한다.The permanent magnet 50 is the circumferential direction of the piston 26 (

May be magnetized in the longitudinal direction z of the piston 26, and a plurality of the circumferential directions may be

) And the magnetized in the longitudinal direction z will be described.

In addition, the permanent magnet 50 is preferably a plurality of rows magnetized in the longitudinal direction of the piston 26 to increase the damping force.

Looking at the operation of the present invention configured as described above are as follows.

First, when the washing machine is operated, an excitation force is generated in the tub 10, and the excitation force is transmitted to the cylinder 22 of the damper 20 through the tub 10.

)에 의해서 길이방향으로 이동(z 방향)하게 되고, 이 때, 상기 실린더(22)에는 실린더(22)와 피스톤(26)의 상대운동에 의해 상기 영구자석(50)에서 나오는 자속(Φ)으로부터 속도에 비례하는 역기전력(e,페러데이의 법칙 식1 참조)이 발생한다.The cylinder 22 has a transmitted excitation force (

Is moved in the longitudinal direction (z direction), and at this time, the cylinder 22 is formed from the magnetic flux? Emitted from the permanent magnet 50 by the relative movement of the cylinder 22 and the piston 26. A counter electromotive force (e, see Faraday's Law Equation 1) is proportional to the velocity.

[Equation 1]

Here, e is the counter electromotive force, Φ is the linkage flux, v is the relative speed of the cylinder and the piston.

At this time, the cylinder 22 generates a current i in the circumferential direction θ by the electric circuit equation (2) consisting of the generated counter electromotive force and the circuit constant of the cylinder 22.

[Equation 2]

Here, R is a cylinder circuit resistance, L is a cylinder circuit inductance, and i is an induction current.

) 이 발생한다.In addition, the cylinder 22 is opposed to the direction of movement (z direction) according to Lorenz's law (3) by the generated current i and the magnetic flux Φ which is connected to the cylinder 22 by the permanent magnet 50. Force, that is, damping force (

) Occurs.

[Equation 3]

Where k is the force constant.

)과 댐핑력(

)에 의한 힘의 평형방정식 식 4 로부터 결정된다.On the other hand, the vibration amount of the damper 20 is the excitation force (

) And damping force (

The equilibrium equation of force by

[Equation 4]

Where m is the mass acting on the cylinder.

)는 댐퍼(20)의 실린더(22) 재질 내부에서 줄열에너지(

)로 변환(식5 참조)되게 되어 결국 진동량이 줄게 되고, 상기 세탁기의 진동/소음을 저감시키게 된다.At this time, when viewed from the energy side, the kinetic energy represented by vibration by the excitation force (

) Is the Joule thermal energy () inside the material of the cylinder 22 of the damper 20

), Thus reducing the amount of vibration and reducing vibration / noise of the washing machine.

Equation 5

6 is a longitudinal sectional view of an essential part of a damper second embodiment of a washing machine according to the present invention.

Damper 20 of the washing machine according to the present embodiment, as shown in Figure 6, the piston 22 is made of only the magnetic material 25, other components and damping other than the piston 22 made of only the magnetic material 25 Since the force generation principle and the like are the same as in the first embodiment of the present invention, the same reference numerals are used and detailed description thereof will be omitted.

7 is a longitudinal sectional view of an essential part of a damper third embodiment of a washing machine according to the present invention.

As shown in FIG. 7, the damper 20 of the washing machine according to the present embodiment includes a coil 24 in which the cylinder 22 is short-circuited, thereby inducing the induced current i and the damping force according to the number of turns of the coil. The other components other than the shorted coil and the principle of damping force generation are adjustable, and therefore the same reference numerals are used, and detailed description thereof will be omitted.

8 is a longitudinal sectional view of an essential part of a damper fourth embodiment of a washing machine according to the present invention.

Damper 20 of the washing machine according to this embodiment, as shown in Figure 8, the cylinder 22; A piston 26 'inserted into the cylinder 22 and formed of at least one of a magnetic body 28 and a conductor 29; And a permanent magnet 50 'installed in the cylinder 22 to generate an induced current by interaction with the piston 26' to form a damping force, and the piston 26 'includes a magnetic material ( 28) and the conductor 29, and other configurations and damping force generating principles other than the permanent magnet 50 'mounted on the cylinder 22 are the same as those of the first embodiment of the present invention. Use and detailed description thereof is omitted.

The piston 26 'is partially inserted into the permanent magnet 50' such that a portion thereof is positioned inside the cylinder 22, in particular, the permanent magnet 50 '.

The piston 26 ′ has a conductor 29 attached to the outer surface of the magnetic body 28 so that the magnetic body 28 and the conductor 29 are positioned inside and outside to form a layer.

The piston 26 'may be provided with a piston holder 27 in the magnetic body 28 so that the magnetic body 28 may be hinged to the base 2 while forming the exterior of the piston 26'. In addition, the magnetic body 29 is mounted to the outside of a separate piston member (not shown) and the piston holder 27 is provided on the separate piston member so that the piston member forms the appearance of the piston 26 'while the base ( Of course, the hinged connection to 2) is also applicable.

The magnetic body 28 is preferably made of any one of a ferromagnetic material and a paramagnetic material.

The conductor 29 is mounted on the outer circumferential surface of the magnetic body 28, in particular the portion located inside the cylinder 22.

The permanent magnet 50 ′ is magnetized to the inner circumferential surface of the cylinder 22 so that the permanent magnet 50 ′ may be located outside the conductor 29.

)으로 착자되는 것도 가능하고, 상기 실린더(22)의 길이방향(z)으로 착자되는 것도 가능하며, 이하, 복수개가 원주 방향(

) 및 길이 방향(z)으로 착자되는 것으로 한정하여 설명한다.The permanent magnet 50 'is the circumferential direction of the cylinder 22 (

May be magnetized in the longitudinal direction z of the cylinder 22, and a plurality of the circumferential directions may be

) And the magnetized in the longitudinal direction z will be described.

In addition, the permanent magnet 50 ′ is preferably magnetized in multiple rows in the longitudinal direction of the cylinder 22 to increase damping force.

9 is a longitudinal sectional view of an essential part of a damper fifth embodiment of a washing machine according to the present invention.

As shown in FIG. 9, the damper 20 of the washing machine according to the present embodiment includes a coil 24 in which a piston 26 'is short-circuited, and thus induced current i and damping force according to the number of turns of the coil. And other components other than the shorted coil and the principle of damping force generation are the same as in the fourth embodiment of the present invention, and the same reference numerals are used and detailed description thereof will be omitted.

On the other hand, the present invention is not limited to the above embodiment, it is also applied when the damper is connected to any one of the cabinet 4, the cabinet cover 7, the top cover 8, and the tub 10. It is possible, of course, is applicable to the case other than the tub 10 and the base 2 is connected, of course, various embodiments of the shape is possible within the technical scope to which the present invention belongs.

Damper of the washing machine according to the present invention is configured as described above any one of the cylinder and the piston is made of a magnetic material and a combination of the magnetic material and the conductor, the permanent magnet is installed on the other side of the cylinder and the piston, the vibration of the tub in the permanent magnet Since the damping force of the damper in proportion to the amount of vibration of the tub is continuously generated by the induced current formed therein, there is an advantage of minimizing vibration / noise.

In addition, since the damper of the washing machine according to the present invention generates an induction current without connecting an external power source, an algorithm for continuously controlling a circuit and damping force such as an external power supply device and a sensor is unnecessary, and thus the cost is low and easy to manufacture. There is one advantage.

In addition, the damper of the washing machine according to the present invention may have not only the longitudinal damping force but also the radial damping force according to the magnetizing direction of the permanent magnet, thereby improving the damping ability.

Claims (6)

A cylinder in which the conductor and the magnetic body are composed of layers; A piston having a portion inserted into the cylinder; The damper of the washing machine, characterized in that it comprises a permanent magnet installed on the piston to generate an induced current by interaction with the cylinder to form a damping force. delete The method of claim 1, The damper of the washing machine, characterized in that the piston is made of a magnetic material. A cylinder; A piston partially inserted into the cylinder, the piston comprising a layer of conductors and magnetic bodies; And a permanent magnet installed in the cylinder, the permanent magnet generating an induced current through interaction with the piston to form a damping force. delete The method of claim 4, wherein Damper of the washing machine, characterized in that the cylinder is made of a magnetic material.

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