KR100841596B1 - Cooling device of coil for magnetic stimulator - Google Patents

Abstract

A cooling device of a coil for magnetic stimulator is provided to cool the heat of the coil efficiently by manufacturing the coil generating a magnetic field with a copper pipe and circulating the cooling liquid therein. A cooling device of a coil for magnetic stimulator includes a coil(200), a cooling liquid, a pump(210), and a cooling liquid storing tank(220). The coil consists of a tube that receives the power and generates magnetic field. The cooling liquid is circulated in the coil and absorbs the heat. The pump maintains the flow of the cooling liquid in a predetermined direction. The cooling liquid storing tank stores the cooling liquid. The cooling device includes a condenser(230), a temperature sensor(240) and a control portion(250) that extracts the temperature from the temperature sensor and operates a fan of the condenser.

Description

Cooling device of coil for magnetic stimulator

1 is a view showing a circuit of a conventional magnetic field therapy device,

2 is a block diagram of a magnetic field treatment device according to one embodiment of the present invention;

3 is a cross-sectional view of a coil which is an embodiment of the present invention;

4 is a view showing an eight-shaped coil according to another embodiment of the present invention;

Figure 5a is a magnetic field density of the eight-shaped coil according to another embodiment of the present invention,

5B is an induction electric field density of an 8-shaped coil according to another embodiment of the present invention.

       <Explanation of symbols for main parts of the drawings>

200: coil 210: pump

220: coolant storage tank 230: condenser

240: temperature sensor 250: control unit

260: Compressor

The present invention relates to a cooling device for a magnetic field therapy device, and more particularly, to a cooling device for cooling a coil generating a magnetic field in a magnetic field therapy device for stimulating or treating a patient's body using a magnetic field.

In general, a magnetic field therapy device using a magnetic field is a device that generates a magnetic field by applying a pulse current to the coil, and the current generated by the generated magnetic field is induced in the human tissue to stimulate and treat the affected part. The magnetic field therapy device includes a coil for generating a magnetic field, and generates a magnetic field having a desired intensity around the coil by flowing a current of several thousand A to the coil in a short time (50 to 300 µs).

1 is a diagram illustrating a circuit 100 of a conventional magnetic field therapy device.

는 스위칭 소자에 의해 펄스전류(I)가 자기장 유도 코일

에 흐른다. 이때, 자기장의 세기를 높이기 위해서는 전원측의 캐패시턴스(C)나 전압(V)을 올리면 된다.Referring to FIG. 1, energy charged in a large capacity capacitor connected to a power supply side

Is the magnetic field induction coil

Flows on. At this time, in order to increase the strength of the magnetic field, the capacitance C or the voltage V on the power supply side may be increased.

에 의해 코일에서 열로 소모된다.Therefore, due to raising the capacitance (C) or voltage (V), when a large current (I) flows in the coil, not only a magnetic field is induced from the energy (W _L ) but also some energy of W _L is Joule's law.

Is consumed as heat in the coil.

In addition, the heat generated continuously increases not only the inductance L of the coil, but also the internal resistance R of the coil, and as a result, more heat is generated in the coil by the Joule law.

Therefore, if the heat is not cooled effectively, the coil is overheated and the inductance value is changed, as well as the coil case surrounding the coil is overheated. These problems are not only dangerous to the patient, but also cause malfunction of the magnetic field therapy device, and thus cannot continuously carry out magnetic therapy.

In order to solve this problem, US Patent No. 6,179,770 is composed of a circulation structure using one or more coils, a coil case surrounding the coil, a conduit and a tube for supplying the cooling gas, and supplies the cooling gas into the coil case to supply the cooling gas. A system was developed to cool the generated heat.

However, this method has a problem in that the structure of the coil for cooling is complicated, the heat generated from the coil cannot be efficiently cooled, and there is a difficulty in managing the cooling gas.

Accordingly, the present invention provides a cooling device for a magnetic field therapy device to efficiently cool the heat of the coil by implementing a cooling device with a simple structure for manufacturing a coil generating a magnetic field with a copper tube and circulating a coolant therein. There is an object of the present invention.

The object of the present invention is a coil consisting of a tube for generating a magnetic field by receiving power; A coolant circulating inside the coil to absorb heat; A pump for maintaining the flow of the cooling liquid in a constant direction; And a coolant storage tank for storing the coolant.

Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

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

2 is a block diagram of a magnetic field treatment device according to an embodiment of the present invention.

Referring to FIG. 2, the cooling device of the magnetic field therapy device includes a coil 200, a pump 210, a coolant storage tank 220, a condenser 230, a temperature sensor 240, a controller 250, a compressor 260, and the like. It consists of.

The coil 200 has a characteristic of generating a magnetic field by receiving a current, and may treat a patient using the magnetic field generated by the coil 200. In addition, the coil 200 generates heat together with the magnetic field. Therefore, the coil 200 according to an embodiment of the present invention is preferably manufactured in the form of a tube capable of circulating a coolant therein.

In addition, the coil 200 is made of a copper tube having high corrosion resistance, good thermal or electrical conductivity, and excellent mechanical properties, and the shape of the coil 200 is most preferably made of a pancake type that draws a circle from the inside.

In addition, the coil 200 made of a copper tube may be applied to any shape that can efficiently generate a magnetic field even if it is not a pancake type.

The pump 210 extracts the coolant from the coolant storage tank 220 to inject and circulate the inside of the coil 200.

The coolant storage tank 220 stores a low temperature liquid coolant. In addition, the coolant storage tank 220 also stores the coolant in a liquid state circulated inside the coil 200.

The coolant uses a commercially available refrigerant oil such as silicon oil or transformer oil to prevent corrosion of the coil 200.

The condenser 230 is interlocked with the coolant storage tank 220 and maintains the coolant in a low temperature state by air cooling.

The temperature sensor 240 is installed in the moving passage of the coolant circulated from the magnetic field generating coil 200 between the coolant storage tank 220 and the condenser 230 to measure the temperature of the coolant.

In addition, by installing an additional temperature sensor (not shown) outside the coil 200, the heat generated by the coil 200 may be measured.

The controller 250 extracts the temperature of the coolant measured by the temperature sensor 240, and operates the fan of the condenser 230 when the temperature of the initially set coolant exceeds. In general, when the temperature of the coolant exceeds 43 degrees, the impedance increases, causing an abnormality in the device, and the generation efficiency of the magnetic field is reduced. Therefore, it is most preferable that the set temperature of the cooling liquid of the control part 250 is 43 degrees or less.

In addition, the controller 250 may extract the temperature of a temperature sensor (not shown) installed outside the coil 200, and determine whether the pump is operated by comparing the temperature of the temperature sensor 240 of the coolant movement passage.

The compressor 260 is operated by the controller 250 when the temperature of the cooling liquid in the temperature sensor 240 exceeds the set temperature. The compressor 260 is interlocked with the condenser 230 and maintains the temperature of the coolant at a low temperature by using the refrigerant gas. In consideration of environmental pollution, the refrigerant gas uses HCFC (Hydro-Chloro-Fluoro-Carbon), PFC (Per-Fluoro-Carbon), HFC (Hydro-Fluoro-Carbon), or the like.

In addition, the arrow of FIG. 2 shows circulation of the said coolant.

3 is a cross-sectional view of a coil 300 which is an embodiment of the present invention.

3 is a cross-sectional view of the coil 200 of FIG. 2 cut in a dotted line direction.

Referring to FIG. 3, the coil 300 is composed of a copper tube 310, a glass fiber 320, an epoxy resin 330, and a housing 340.

The copper tube 310 has a shape for efficiently generating a magnetic field by receiving a current. In order to efficiently generate a magnetic field, the copper tube 310 is composed of a single layer rather than a plurality of layers. When composed of a plurality of layers, the overall impedance is increased, which does not generate a magnetic field efficiently.

In addition, the shape of the copper tube 310 is implemented as an ellipse, thereby increasing the generation efficiency of the magnetic field, it is also easy to install an insulating film of the glass fiber 320.

Therefore, even if the copper tube 310 is composed of a single layer, there is no problem in generating the necessary magnetic field as a treatment device.

Glass fiber 320 is installed to insulate the copper tube 310 through which current flows. Since the glass fiber 320 is insulated between the copper tubes 310, the glass fiber 320 is insulated from only one surface of the copper tube 310 by an insulating film. Since an insulating film is not provided above and below the magnetic field of the copper tube 310, it is effective for generating the magnetic field.

Here, the glass fiber 320 is a general chemical that is commonly used as an insulator, and is an excellent insulating film having a thin thickness of SiO ₂ .

The epoxy resin 330 is injected into the housing 340 to be filled, and serves as an insulator on the outer surface of the coil 300 while fixing the copper tube 310 and the glass fiber 320.

The housing 340 surrounds the outside of the coil 300.

Referring to FIG. 3, the coil 300 may be implemented with a minimum radius with the glass fiber 320 insulated from the copper tube 310 interposed therebetween, thereby reducing the size of the entire coil 300 to efficiently generate a magnetic field. .

4 is a diagram illustrating a figure of eight coil 400 according to another embodiment of the present invention.

Referring to Figure 4, by connecting the two coils made of copper tube to implement the eight-shape, it is possible to concentrate the induction electric field by the generation of the magnetic field. The magnetic field generated by the magnetic field therapy device is an induction electric field that actually affects the patient. Therefore, the eight-shaped coil 400 can maximize the therapeutic effect by using the intensive magnetic field treatment, such as the head in the desired area.

5A and 5B are diagrams illustrating magnetic and induction electric fields of an eight-shaped coil according to another embodiment of the present invention.

Referring to Figure 5a, the density of the magnetic field generated in the eight-shaped coil occurs in the form of two cylinders.

5b shows the density of the electric field induced in the two cylindrical magnetic fields. The density of the electric field is most concentrated in the center, and by using this property, a strong treatment effect can be expected in a narrow area.

Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various modifications and variations are possible without departing from the spirit of the present invention and equivalents of the claims to be described below.

Therefore, the cooling device of the magnetic field treatment device of the present invention has the advantage of reducing the possibility of leakage of the coolant by injecting and circulating a coolant with a low temperature to the coil manufactured in the form of a copper tube with an insulating film, the effect of excellent cooling efficiency have.

In addition, since the coil is manufactured in the form of a copper tube through which a large current flows and the coolant is circulated, the magnetic field generating coil does not need an additional device for cooling, and thus the structure is simple.

In addition, by implementing the shape of the copper tube elliptical has the advantage of easy to install the glass fiber, there is an effect that can efficiently generate a magnetic field.

In addition, by implementing the shape of the coil to the eight-shaped has the effect that can be intensive magnetic field treatment.

Claims (9)

A coil consisting of a tube receiving power and generating a magnetic field; A coolant circulating inside the coil to absorb heat; A pump for maintaining the flow of the cooling liquid in a constant direction; And Coolant storage tank for storing the coolant Cooling device of the magnetic field treatment device comprising a. The method of claim 1, The cooling device includes a condenser to keep the coolant at a low temperature in association with the coolant storage tank; A temperature sensor for measuring a temperature of the cooling liquid; And Control unit for extracting the temperature from the temperature sensor to operate the fan of the condenser Cooling device of the magnetic field treatment device further comprising. The method of claim 2, A compressor operated by the control unit and supplying refrigerant gas to the condenser Cooling device of the magnetic field treatment device further comprising. The method of claim 1, The coolant is a cooling device of the magnetic field therapy device using a silicone oil or transformer oil to prevent corrosion of the coil. The method of claim 1, The coil is a cooling device of the magnetic field treatment device consisting of a copper tube having a high corrosion resistance, good electrical conductivity and excellent mechanical properties. The method of claim 5, Cooling device of the magnetic field treatment device of the elliptical cross section of the copper tube. The method of claim 1, The coil is a pancake type or eight-shaped cooling device of the magnetic field treatment device. The method of claim 1, Cooling device of a magnetic field therapy device, there is an insulator between the coils. The method of claim 8, And the coils are insulated and fixed by an epoxy resin.

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