KR20100026107A - Magnetic field generating apparatus having low noise - Google Patents

Abstract

PURPOSE: A magnetic field generating apparatus having low noise is provided, which can reduce noise from coil in the magnetic field generation. CONSTITUTION: A magnetic field generating apparatus having low noise comprises a case(500), a fan(510), a coil(540), and coil fitting units(520,550). In the case, the top penetration port and lower penetration port are formed in the surface. The case provides internal space of the constant size. The fan is located to be connected to the top penetration port. The coil is installed in the internal space of the case and generates the magnetic field. The coil fitting unit is installed to the top surface or the bottom surface of the coil.

Description

Low noise magnetic field generating device with excellent heat dissipation characteristics {Magnetic field generating apparatus having low noise}

The present invention relates to a magnetic field therapy device using a time-varying magnetic field, and more particularly, to generate a noise by applying a pulsed current to a coil to induce a magnetic field to be used for treatment and to provide it to the affected area such as the human epidermis. A low noise magnetic field generating device having a structure capable of reducing and efficiently dissipating heat generated from a coil.

In general, a magnetic field therapy device is a medical device that generates a magnetic field by applying a pulsed current to the coil, and stimulates and treats human tissue with the generated magnetic field. Such a magnetic field treatment device includes a magnetic field generating device having a coil for generating a magnetic field, and generates a magnetic field having a desired intensity around the coil by applying a current of about thousands A to the coil of the magnetic field generating device in a short time.

The magnetic field generating device increases the number of turns of the coil per unit area in order to increase the output of the induced magnetic field generated in the coil. As such, in order to increase the number of turns of the coil to increase the output of the induction magnetic field, a circular coil in which a coil coated with an insulating material on the surface is disposed so that adjacent coil lines are in close contact with each other and is wound at a high density. use.

On the other hand, when a high current is applied to the circular coil to induce a magnetic field, not only a considerable amount of noise is generated by the interaction of the coil lines that are in contact with each other, but also a large amount of heat of about 500 W to 2 KW is generated from the coil. Done. Failure to effectively cool the heat generated from the coil may cause the magnetic field therapy coil to overheat, change the inductance value of the coil, which may be dangerous for the patient, or cause the case to overheat, resulting in the magnetic device not operating properly. .

Various types of coil cooling methods have been proposed to solve this problem. The coil cooling method is largely classified into (1) a cooling medium circulation method using oil or cooling water, and (2) an air circulation method.

First, Nippon Goden Co., Ltd. installs a cooling medium flow conduit inside a quadrangular through-conductor forming a magnetic pole coil, flows the cooling medium through the cooling medium flow conduit, and circulates the refrigerant through the conduit to generate heat from the coil. A method of cooling has been proposed. 1 is a perspective view schematically showing a coil according to the foregoing scheme. However, this method increases the coil size and makes it difficult to produce a small coil. In addition, it is difficult to increase the number of turns of the coil by the size of the coil, thereby efficiently securing a sufficient magnetic field required for magnetic stimulation. Unexpected problem occurs.

In addition, Korean Patent Laid-Open Publication No. 10-2003-0065126 has been proposed "a magnetic pole coil cooling system of a device using a magnetic field", which discloses a cooling system using a cooling oil. 2 is a block diagram showing the overall system according to the above patent. As shown in FIG. 2, the coil cooling system of the aforementioned patent connects a coil case surrounding a coil, a cooling oil pump, and a cooler using a cooling oil pipe in a circulation structure, and flows cooling oil into the cooling oil pipe to generate the coil. The cooling oil in the coil case heated by heat is cooled by the cooler, and then circulated back into the coil case to cool the coil. However, such a cooling system has to be provided with a cooling oil pump, a cooler, and a cooling oil pipe separately, which not only increases the structure and the manufacturing cost but also increases the overall size of the product, making it difficult to miniaturize it.

As described above, in the cooling method using the cooling oil, since the coil is disposed in a closed space in which the cooling oil flows, the noise generated from the coil may be reduced, but it is required to further include a structure for circulating the cooling oil. If the overall structure is complicated and the hot coolant leaks, there are problems causing damage to both the patient and the equipment.

On the other hand, the cooling method using the air circulation method does not require the cooling oil and the sealed space, but the noise generated from the coil is not blocked more than about 92 dB and is transmitted to the outside by the through hole for air circulation, which makes it difficult to treat the patient. There is a problem of severe noise generation.

An object of the present invention for solving the above problems is to provide a low-noise magnetic field generating device having a structure that can reduce the noise generated from the coil at the time of magnetic field generation, and can efficiently discharge heat generated from the coil to the outside. .

Magnetic field generating apparatus according to the first aspect of the present invention for achieving the above technical problem,

An upper through hole and a lower through hole formed on a surface of the case, the case providing an inner space of a predetermined size; A fan disposed such that an area through which air is discharged or sucked is connected to an upper through hole of the case; A coil installed in an inner space of the case to generate a magnetic field; A coil fixing part mounted on an upper surface or a lower surface of the coil to fix the coil, wherein the coil is formed in a spiral shape from a central part, and a gap is formed between adjacent coil lines. Adjacent coil lines are not in contact with each other.

The magnetic field generating device having the above-mentioned characteristics further includes a spacer disposed between adjacent coil lines of the coil, the spacer providing a gap between the adjacent coil lines.

The coil fixing part of the magnetic field generating device having the above-described characteristics is mounted on the upper surface of the coil to provide a gap having a predetermined thickness between the coil and the upper surface of the case, or mounted on the lower surface of the coil. To provide a gap having a predetermined thickness between the coil and the lower surface of the case, or may be mounted on both the upper surface and the lower surface.

The magnetic field generating device according to the present invention having the above-described configuration efficiently discharges heat generated from a coil to the outside using an air circulation method, thereby making it simple in structure and miniaturized.

In addition, the magnetic field generating device according to the present invention is to ensure that a gap is formed between adjacent coil lines of the coil wound along the spiral direction so that adjacent areas of the coil do not come into contact with each other, thereby ensuring noise generated by the vibration of the coil. It can be reduced. In order to confirm the noise reduction effect, the noise generated in the magnetic field generating device according to the conventional method and the magnetic field generating device according to the present invention was measured, and the measuring equipment was measured at a distance of 10 cm from the device using the DT-8850 soundlevel meter of CEM. The measured results are shown in Table 1.

Kinds Noise [dB] (a) Air circulation magnetic field generating device using coil with gap (invention) 82.7 (b) Oil-cooled magnetic field generator using coil without gap 85.5 (c) Magnetic field generator of air circulation type using coil without gap 92.0 (d) Magnetic field generating apparatus including core of air circulation type using coil without gap 99.5

Through Table 1, it can be seen that (c) and (d), which are magnetic field generators of the conventional air circulation method, are significantly high as 92.0 dB and 99.5 dB, respectively. The magnetic field generating device of (b) has a noise of 85.5 dB, but the magnetic field generating device (a) of the present invention has a smallest noise of 82.7 dB. That is, the magnetic field generating device of the air circulation method using a coil with a gap according to the present invention is significantly reduced in noise than the magnetic field generating device of the air circulation method using a coil without a conventional gap, the coil without a conventional gap It was confirmed that the noise was reduced compared to the oil-cooled magnetic field generator used.

In addition, the magnetic field generating device according to the present invention further comprises a spacer in the gap of the coil to maintain a constant gap between adjacent coil lines of the coil, it is possible to maintain a constant intensity of the output induced magnetic field.

Hereinafter, a magnetic field generating device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Magnetic field generating apparatus according to a preferred embodiment of the present invention is mounted on the end of the cantilever of the magnetic field treatment device.

3 (a) and 3 (b) are a perspective view and a bottom view showing the overall appearance of a magnetic field generating device according to a preferred embodiment of the present invention. (A) and (b) are sectional drawing and perspective view along the AA 'direction of FIG. 5 is an exploded perspective view of the magnetic field generating device shown in FIG. 4. 3 to 5, the magnetic field generating device according to the present invention includes an upper space 500, a lower case 560 connected to a lower end of the upper case, and an inner space formed by the upper case and the lower case. The fan 510, the first coil fixing part 520, the coil 540, and the second coil fixing part 550 that are sequentially disposed on the side are provided. Hereinafter, each component described above will be described in detail.

The upper case 500 has an upper surface connected to the magnetic field treatment device 40, and has one or more upper through holes 502 through which air flows out from the interior space or air flows into the interior space. The lower case 560 is fixed to the lower portion of the upper case 500. By fixedly connecting the upper case and the lower case, it provides an internal space in which the above-described components can be arranged. Meanwhile, in another embodiment of the present invention, the upper case and the lower case may be manufactured and used as one physical case. The lower case 560 or the lower surface of the case is placed on the affected part such as the skin of the patient.

The lower case 560 includes one or two lower through holes 562 and 564 through which air is introduced from the outside or the air is discharged to the outside. The lower through hole may be selectively provided on the side or the bottom of the lower case, or may be provided on both the side and the bottom. In addition, the lower through hole may be formed on the side of the upper case. However, the upper through hole is formed in the upper region of the arrangement position of the coil and the lower through hole is formed in the lower region of the arrangement position of the coil, so that the air flowing in from the outside after passing through the coil to flow out It is preferable.

On the other hand, when the upper case and the lower case is made of one case according to another embodiment of the present invention, the upper through hole is formed on the surface of the case located in the upper region than the arrangement position of the coil, the lower through hole is disposed of the coil It is preferably formed on the surface of the case located in the lower region than the position.

The fan 510 is mounted inside the upper case as shown in FIG. 4, and an area in which air flows out or flows in the fan is preferably connected to the upper through hole of the upper case. The direction of inflow and outflow of air into the interior of the cooling device is determined by the rotational direction of the fan. Meanwhile, in another embodiment of the present invention, the fan 510 may be mounted outside the upper case, and in this case, an area in which air of the fan is leaked or introduced is connected to the upper through hole of the upper case. It is preferable.

The coil 540 is a circular coil wound along a spiral direction with respect to the center portion. The coil 540 is wound along a spiral direction, and a gap Gd (d) of FIG. 6 is formed between adjacent coil lines so that adjacent coil lines do not contact each other. By thus preventing adjacent coil lines of the coil from contacting each other, noise generated by the interaction between adjacent coil lines in operation can be significantly reduced. In addition, it is possible to efficiently discharge heat generated from the coil to the outside of the magnetic field generator by preventing adjacent coil lines of the coil from contacting each other so that external air can flow between the coil lines.

The first coil fixing part 520 and the second coil fixing part 550 are fixedly connected to the upper surface and the lower surface of the coil, respectively. In this case, the fixing method may be fixed by using a fixing member such as a screw, using an adhesive, or the like.

The first coil fixing part 520 is fixedly mounted on the upper surface of the coil to prevent the coil from moving and to keep the gaps formed between the coil and the coil not to be disturbed, as well as between the coil and the fan or the coil. And a gap having a predetermined thickness is formed between the upper case and the upper case to smooth the air flow.

The second coil fixing part 550 is fixedly mounted on the lower surface of the coil and, like the first coil fixing part, prevents the coil from moving and keeps the gaps formed between the coil and the coil undisturbed. In addition, the second coil fixing part 550 is disposed at a position spaced apart from the lower surface of the lower case by a predetermined distance so that a gap having a predetermined thickness is formed between the coil and the lower case, thereby penetrating the lower case. It is desirable to facilitate the inflow and outflow of air from the spheres.

The first and second coil fixing parts 520 and 550 may be implemented in various forms. According to various embodiments of the first and second coil fixing parts, a cross-shaped (+) having four legs, a structure having three legs, or a straight shape having two legs may be formed based on a central portion. It may be configured as, in addition to it may be configured coil fixing of various shapes. In this case, the first coil fixing part mounted on the upper part and the second coil fixing part mounted on the lower part may be configured in different shapes or may be configured in the same shape.

On the other hand, the magnetic field generating device according to the present invention further comprises a spacer disposed in the gap (Gap) formed between the adjacent coil line of the coil, to maintain a constant width of the gap formed between the adjacent line of the coil It is possible to prevent the width from being deformed. The shape of the spacer may be implemented in various ways, and various embodiments of the spacer will be described.

6 is a perspective view showing a coil equipped with a spacer to illustrate a spacer 800 that may be used in the magnetic field generating device 41 according to the preferred embodiment of the present invention. Referring to FIG. 6, a spacer 800 is a piece fixedly disposed in a gap formed between adjacent lines of a coil, and the spacers are formed of an insulating material. 6 is a perspective view partially enlarged of the spacer shown in a circle indicated by a dotted line in FIG. 6.

 7 is a perspective view and a cross-sectional view illustrating another embodiment of the spacer by way of example. Referring to FIG. 7, (a) is an exploded perspective view according to another embodiment of a spacer, (b) is a perspective view showing a form in which (a) is combined, and (c) is a cutaway along the AA direction of (b). It is sectional drawing about each component shown, and (d) is sectional drawing cut along the AA direction of (b). The spacer illustrated in FIG. 7 is manufactured by integrating the first coil fixing part and the spacers. As shown in FIG. 7, the spacer according to the present embodiment includes a first coil fixing part 920, a coil 940, and a second coil fixing part 950, and the first coil fixing part 920. The uneven portion 930 is formed on the surface in contact with the coil, and the protruding regions 932 of the uneven portion act as a spacer. Preferably, the thickness d ″ of the protruding regions 932 is equal to or smaller than the gap d of the coil. Protruding regions of the uneven portion 932 formed in the first coil fixing part 920 are formed. 932 is fitted into a gap formed between adjacent regions of the coil.

The operation of the magnetic field generating device having the above-described configuration will be described below.

8 conceptually illustrates the flow of air in a magnetic field generating device according to a preferred embodiment of the present invention. Referring to FIG. 8A, air flows through the lower through hole of the lower case according to the operation of the fan as shown by the arrow, and the introduced air flows between the coils, the inner space, and the fan. It flows out through the upper through hole of the upper case. At this time, as the air introduced passes through the coils and receives heat from the coils and flows out, the heat generated from the coils is efficiently discharged to the outside. FIG. 8 (b) shows that by operating the fan in the opposite direction, outside air flows in through the upper through hole of the upper case and inside air through the lower through hole of the lower case as shown by the arrow. Outflow.

Although the present invention has been described above with reference to preferred embodiments thereof, this is merely an example and is not intended to limit the present invention, and those skilled in the art do not depart from the essential characteristics of the present invention. It will be appreciated that various modifications and applications which are not illustrated above in the scope are possible. And differences relating to such modifications and applications should be construed as being included in the scope of the invention as defined in the appended claims.

The magnetic field generating device according to the present invention can be widely used in magnetic field therapy devices.

1 to 2 are perspective views showing the cooling apparatus of the magnetic field treatment device according to the prior art.

3A and 3B are a perspective view and a bottom view of a magnetic field generating device 41 according to a preferred embodiment of the present invention.

(A) is sectional drawing along the A-A 'direction of FIG. 3 (a), (b) is a perspective view with respect to a cross section.

FIG. 5 is an exploded perspective view of the magnetic field generating device 41 shown in FIG. 5.

6 is a perspective view showing a coil equipped with a spacer to illustrate a spacer 800 that may be used in the magnetic field generating device 41 according to the preferred embodiment of the present invention.

FIG. 7 illustrates another embodiment of the spacer of the magnetic field generating device 41 according to the preferred embodiment of the present invention, (a) is an exploded perspective view according to another embodiment of the spacer, (b) is (a) is a perspective view showing the combined form, (c) is a cross-sectional view of each part shown by cutting along the AA direction of (b), (d) is shown by cutting along the AA direction of (b) One cross section.

8 conceptually illustrates the flow of air in a magnetic field generating device according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

500: upper case

502: upper through hole

560: lower case

562, 564: lower through hole

510: fan

520, 920: first coil fixing part

540, 940: coil

550, 950: second coil fixing part

800: spacer

930: uneven portion

Claims (11)

An upper through hole and a lower through hole formed on a surface of the case, the case providing an inner space of a predetermined size; A fan disposed such that an area through which air is discharged or sucked is connected to an upper through hole of the case; A coil installed in an inner space of the case to generate a magnetic field; A coil fixing part mounted on an upper surface or a lower surface of the coil to fix the coil; And a coil wound in a spiral shape from a central portion of the coil, and a gap formed between adjacent coil lines so that adjacent coil lines do not contact each other. An upper through hole and a lower through hole formed on a surface of the case, the case providing an inner space of a predetermined size; A fan disposed such that an area through which air is discharged or sucked is connected to an upper through hole of the case; And A coil installed in an inner space of the case to generate a magnetic field; And a coil wound in a spiral shape from a central portion of the coil, and a gap is formed between adjacent coil lines so that adjacent coil lines do not contact each other. The magnetic field generating device of claim 1, further comprising a spacer disposed between adjacent coil lines of the coil, the spacer providing a gap between the adjacent coil lines. Magnetic field generating device. The magnetic field generating device of claim 1, wherein the coil fixing part is mounted on an upper surface of the coil and provides a gap having a predetermined thickness between the coil and the upper surface of the case. The magnetic field generating device of claim 1, wherein the coil fixing part is mounted on a lower surface of the coil and provides a gap having a predetermined thickness between the coil and the lower surface of the case. The magnetic field generating device of claim 1, wherein an uneven portion is formed on a surface of the coil fixing portion which is in contact with the coil, and protruding regions of the uneven portion are fitted into gaps of the coil. An upper through hole and a lower through hole formed on a surface of the case, the case providing an inner space of a predetermined size; A fan disposed such that an area through which air is discharged or sucked is connected to an upper through hole of the case; A coil installed in an inner space of the case to generate a magnetic field; And A spacer disposed between adjacent coil lines of the coil to form a gap to prevent adjacent coil lines of the coil from contacting each other; And a coil wound in a spiral shape from a central portion of the coil, and a gap formed between adjacent coil lines so that adjacent coil lines do not contact each other. The method of claim 1, wherein the upper through hole is formed on the surface of the case located in the upper region of the coil and the lower through hole is formed on the surface of the case located in the lower region of the coil. Magnetic field generating device, characterized in that formed. The method of claim 1, wherein the lower through hole of the case is formed on the surface of the case located in the lower region of the coil, and optionally formed on the side or bottom of the case, Magnetic field generating device characterized in that all formed on the bottom. The magnetic field generating device of claim 7, further comprising a coil fixing part provided on an upper surface of the coil, wherein the coil fixing part provides a constant gap between the coil and the surface of the case. Magnetic field generating device, characterized in that. The magnetic field generating device of claim 7, further comprising a coil fixing part installed on a lower surface of the coil, wherein the coil fixing part provides a constant gap between the coil and the surface of the case. Magnetic field generating device, characterized in that.

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