WO2017103305A1 - Device for heating by magnetic induction - Google Patents

Device for heating by magnetic induction Download PDF

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Publication number
WO2017103305A1
WO2017103305A1 PCT/ES2016/070862 ES2016070862W WO2017103305A1 WO 2017103305 A1 WO2017103305 A1 WO 2017103305A1 ES 2016070862 W ES2016070862 W ES 2016070862W WO 2017103305 A1 WO2017103305 A1 WO 2017103305A1
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WO
WIPO (PCT)
Prior art keywords
cylindrical body
magnets
heating device
magnetic induction
induction heating
Prior art date
Application number
PCT/ES2016/070862
Other languages
Spanish (es)
French (fr)
Inventor
Manuel MARTÍNEZ RUIZ
Original Assignee
Maxwell & Lorentz, S.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maxwell & Lorentz, S.L. filed Critical Maxwell & Lorentz, S.L.
Publication of WO2017103305A1 publication Critical patent/WO2017103305A1/en

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications

Definitions

  • the present invention is related to the generation of heat for heating applications, such as for obtaining hot water, by proposing a device for producing heat by magnetic induction, with which said function can be developed under improved conditions of efficiency and profitability. .
  • solutions oriented to the heating of fluids have been developed, such as, for example, water circulating through a copper tube or other conductive material, with a tube carrying a magnet distribution being arranged in relation to the tube, associating the disk with a rotary drive motor.
  • Solutions of this type are, for example, those contemplated in documents ES1077579U, US2549362, US20090223948, US5012060, US7339144, US8408378 and US201 10272399, all based on the use of a magnet carrier support rotatably driven by a motor, to be created by the magnets in motion a variable magnetic field in relation to a metallic tube of circulation of a fluid. But such solutions have not been successful in practical implementation, due to the low heat production performance in relation to the energy consumption necessary to drive the carrier support of the magnets.
  • Spanish patent application P2014314766 of the same applicant as the present invention, contemplates an embodiment to improve the performance of magnetic induction heat production by means of moving magnets, using two or more discs rotating magnet carriers, arranged so that the magnets of the consecutive discs are influenced by favoring the rotary actuation of the discs.
  • This solution requires, however, an exact synchronism of the movement of the disks so that the magnetic influence between them is adequate, which makes assembly difficult.
  • JP2004316943 presents another embodiment in this regard, using a rotating cylindrical body bearing magnets arranged longitudinally at its periphery, a coil of circulation of a fluid to be heated going around the cylindrical body. Due to the size of the magnets used, this solution is more effective than that of a magnet carrier disk where the dimension of the magnets is very limited. However, the heat production efficiency is also low in relation to the energy consumption required to drive the rotating movement of the cylindrical body carrying the magnets. Object of the invention
  • a device for generating heat by magnetic induction by means of moving magnets is proposed, with an embodiment that allows to improve the performance of the solutions known in that direction and, consequently, the application performance.
  • the device object of the invention comprises a cylindrical body that is axially attachable to a rotating actuating means, the cylindrical body being provided at its periphery with a distribution of longitudinal magnets of alternating polarities in the distribution, and going around said cylindrical body a circulation coil of a fluid to be heated.
  • the coil that surrounds the cylindrical body carrying the magnets is housed within a metal housing of an electrical conductive material and thermal conductor, which determines a mass of heat accumulation that produces the movement of the magnets incorporated in the cylindrical body, to transmit said heat to the circulation coil of the fluid to be heated.
  • the rotary drive shaft of the cylindrical body there is also a disk provided on the face facing the cylindrical body with a distribution of radial magnets, also of alternating polarities in its distribution.
  • a complement of magnetic influence is achieved on the housing that houses the circulation coil of the fluid to be heated and, consequently, of the heat that is produced to heat the coil, said complement also being of a remarkable intensity due to the dimension of the magnets arranged radially on the disk.
  • the cylindrical body comprises coupling means for coupling of fixing means, so that the fixing means are coupled in the coupling means and the magnets housed in slots lengths that the cylindrical body has, end portions of the longitudinal grooves are externally covered, the magnets being retained in the longitudinal grooves.
  • the coupling means are external threads and the fixing means are cylindrical bushes with an internal thread, so that a threaded coupling of the fixing means in the coupling means is stable.
  • the magnetic induction heating device comprises the rotationally actuated shaft and a means of tightening, so that by means of the tightening means a tightening fixation between the cylindrical body and the axis is stable.
  • the shaft can be fixed and released with respect to the cylindrical body quickly and easily.
  • the coil is defined by a groove on an external surface of one of the walls along with an internal surface of the other of the walls.
  • the groove develops according to a helical path externally surrounding the wall in which it is located.
  • the heating device object of the present invention comprises at least one striated area in correspondence with an internal surface of one of the walls to radially and externally wrap the longitudinal grooves of the cylindrical body.
  • the magnetic induction heating device comprises two of the cylindrical bodies, the cylindrical bodies being separated from each other according to a distance that allows an interaction between magnetic fields generated by the magnets of each of the cylindrical bodies of each other, of so that the rotation of one of the cylindrical bodies contributes to the rotation of the other of the cylindrical bodies. In this way, a reduction in the energy consumption that is required to drive the rotating movement of the cylindrical bodies bearing the magnets is obtained.
  • said device object of the invention results in characteristics that make it effectively advantageous for the function to which it is intended, acquiring its own life and preferential character with respect to conventional devices of the same application, since it improves the functional conditions. and their performance.
  • Figure 1 shows in perspective an embodiment of the device object of the invention.
  • Figure 2 shows a perspective of the device of the previous figure, with the housing of the circulation coil of the fluid to be heated diametrically sectioned, the magnets of the cylindrical body and the disk incorporated in a rotating shaft having been removed.
  • Figure 3 is a perspective view of the assembly of the cylindrical body and the disk incorporated in a rotating shaft, without the magnets thereof.
  • Figure 4 is a perspective like the previous one, with the cylindrical body and the disk provided with their magnets.
  • Figure 5 is a perspective of the inner wall and the bottom cover of the housing of housing of the coil in the device of the invention.
  • Figure 6 is a perspective like the previous one, with some halves of radial supports for holding the coil in the housing.
  • Figure 7 is a perspective like that of the previous figure with the coil incorporated on the halves of the radial supports.
  • Figure 8 is a perspective like that of the previous figure with the radial support brackets complete with the two halves.
  • Figure 9 is a perspective of the housing of the complete coil housing, without the top cover.
  • Figure 10 shows the cylindrical body according to another embodiment of the device object of the invention.
  • Figure 1 1 shows a view of the cylindrical body and the rotating shaft according to the other embodiment.
  • Figure 12 shows a section of the cylindrical body and the rotating shaft along an A-A line included in Figure 11.
  • Figure 13 shows another view of the cylindrical body and the rotating shaft according to the other embodiment.
  • Figure 14 shows a section of the cylindrical body and the rotating shaft along a line B-B included in Figure 13.
  • Figure 15 shows the internal wall of the housing according to the other embodiment.
  • Figure 16 shows a section of the internal wall of the housing along a line C-C included in Figure 15.
  • Figure 17 shows an exploded view of the device object of the present invention comprising two of the cylindrical bodies according to the other embodiment.
  • Figure 18 shows a section of the device object of the present invention along a D-D line included in Figure 17.
  • Figure 19 shows a bottom view of the device object of the present invention comprising two of the cylindrical bodies according to the other embodiment.
  • Figure 20 shows a section of the device object of the present invention along an E-E line included in Figure 19.
  • the object of the invention relates to a device intended to heat a circulating fluid by a coil (1) of copper, or other thermal conductive material, by generating heat by magnetic induction of magnets (2 and 3) that are incorporated in a cylindrical body (4) and a disk (5), which in turn are arranged on a shaft (6) that is rotatable by means of a motor, or any other conventional means of rotary drive.
  • the device comprises a distribution of magnets (2) arranged longitudinally on the periphery of the cylindrical body (4), with alternating polarities of the successive magnets (2) in the distribution, said magnets (2) being fitted in longitudinal grooves (7) that the cylindrical body (4) has on its periphery.
  • Another distribution of magnets (3) is provided in a radial arrangement in the disk (5), in turn with alternate polarities of the successive magnets (3) in the distribution, said magnets (3) being fitted in slots (8) radial that the disc (5) has on its face oriented towards the cylindrical body (4).
  • the housing (9) comprises two concentric cylindrical walls (9.1 and 9.2) and two covers extremes (10 and 1 1) that close the two walls (9.1 and 9.2).
  • the housing (9) comprises two concentric cylindrical walls (9.1 and 9.2) and two covers extremes (10 and 1 1) that close the two walls (9.1 and 9.2).
  • the supports (12) are formed by two complementary halves that are arranged respectively attached to the walls (9.1 and 9.2) of the housing (9), fitting into grooves (13) that said walls (9.1 and 9.2) have longitudinally in their respective faces facing each other, while at their opposite edges between them said complementary halves of the supports (12) have recesses (14) by coupling them on the coils of the coil (1).
  • the covers (10, 1 1) are connected to the housing (9) by means of screws (15) of a non-magnetic material, such as bronze, so that said screws (15) are not influenced by the magnetic fields preventing They can loosen up.
  • the structural assembly of the housing (9) and the incorporation of the coil (1) in it are very simple, and having a large number of supports (12) in the fastening of the coil (1), the assembly of said housing (9) determines a very compact mass that favors the use of the magnetic influence of the magnets (2 and 3), when the cylindrical body (4) and the disk (5) rotate, to generate heat that is transmitted with great efficiency to the coil (1) in order to heat the circulating application fluid therein.
  • the device designed to heat a fluid by generating heat by magnetic induction comprises the cylindrical body (4 '), said cylindrical body (4') having the longitudinal grooves (7 ') for receiving the magnets ( 2) in the cylindrical body (4 '), in addition to coupling means (16).
  • the first coupling means (16) are for coupling fixing means (17), which are included in the heating device to keep the magnets (2) of the cylindrical body (4 ') in the grooves (7') Longitudinal
  • the longitudinal grooves (7 ') are configured for arrangement of two of the magnets (2) of the cylindrical body (4') facing each other and correspondingly with the periphery as with a central area of the cylindrical body (4 ').
  • the longitudinal grooves (7 ') are diametrically through. Accordingly, in each of the longitudinal grooves (7 ') two of the magnets (2) are arranged radially facing each other.
  • the cylindrical body (4 ') is diametrically sized according to the diametral measurement of the magnets (2) of the longitudinal grooves (7') together. This other embodiment allows to reduce greatly the diametral dimensions and the total weight of the cylindrical body (4 '), which facilitates its rotation.
  • the coupling means (16) are located close to end portions of the longitudinal grooves (7 ').
  • the fixing means (17) are configured so that by coupling them in the coupling means (16), only the end portions of the longitudinal grooves (7 ') are covered or covered by said fixing means (17), that is radially and externally wrapped.
  • the magnets (2) housed in the longitudinal grooves (7 ') are prevented from leaving the cylindrical body (4'), and more specifically of said longitudinal grooves (7 '), by contact of the magnets (2) with the fixing means (17).
  • a central longitudinal part of the magnets (2) is free, that is not perimetrically wrapped by the fixing means (17).
  • the fixing means (17) being coupled in the coupling means (16) most of said longitudinal grooves (7 '), and therefore also of the magnets (2) housed in said grooves (7') , are free or externally not covered by the fixing means (17).
  • the coupling means (16) are external threads arranged in the cylindrical body (4 '), and the fixing means (17) are cylindrical bushes with an internal thread.
  • the cylindrical body (4 ') is sized according to different diameters, the diameter being larger in an average longitudinal part than in a part near a free end.
  • the longitudinal grooves (7 ') of the cylindrical body (4') are two.
  • the coupling means (16) are sized according to an external diameter of the cylindrical body (4 ') larger in the middle longitudinal part than in the part close to each of the free ends of the cylindrical body (4 ').
  • the cylindrical body (4 ') is insertable through the fixing means (17) intended to be coupled in the coupling means (16) located in the middle longitudinal part of the cylindrical body (4') until said means of fixing (17) are attachable in said means of coupling (16); while the cylindrical body (4 ') is insertable through the fixing means (17) intended to engage in the coupling means (16) located the part close to each of the free ends of the cylindrical body (4') only until said fixing means (17) are attachable in said coupling means (16).
  • the diameter of the cylindrical body (4 ') is reduced as it is a part of it closest to its free ends .
  • the described configuration is adapted according to the number of the longitudinal grooves (7 ') included in the cylindrical body (4').
  • the heating device comprises clamping means (18).
  • the tightening means (18) include a through threaded hole and a threaded threaded element in the through threaded hole; and more preferably there are several through threaded holes and threaded elements, such as three of each.
  • the coil (1 ') is located inside the housing (9') between the two walls (9.1 ', 9.2'), an internal wall (9.1 ') and an external wall (9.2'). More specifically, the coil (1 ') is between the two walls (9.1', 9.2 ') surrounding the cylindrical body (4'), being defined directly by said two walls (9.1 ', 9.2') together, such and as is appreciable in Figure 20.
  • the coil (1 ') is defined by a groove in an outer surface of the inner wall (9.1') through which the fluid to be heated can circulate, as is appreciable in the Figures 15 and 16, and by an inner surface of the outer wall (9.2 ').
  • the groove develops according to a helical path to increase the exposure time of the fluid to the heat generated in the housing (9 ') as it passes through said coil (V).
  • the groove has ridges (19) that project externally with respect to the outer surface of the inner wall (9.1 ') to a lesser extent than lateral ones (20) that laterally define the coil (1').
  • the ridges (19) increase the contact surface between the inner wall (9.1 ') and the fluid to be heated for a greater transmission of the heat generated in said inner wall (9.1') by the rotation of the magnets (2) of the body cylindrical (4 ').
  • the inner wall (9.1 ') has an inlet (21) and an outlet (22) for fluid inlet and outlet, as is clearly visible in Figure 16.
  • the inlet (22) is located at correspondence with one end of the coil (1 ') and the outlet (22) in correspondence with the other end of the coil (1').
  • the inlet (21) and the outlet (22) are arranged so that the fluid enters the coil (1 ') and leaves it through the end caps (10', 1 1 ').
  • the end caps (10 ', 1 1') that is to say a lower end cover (10 ') and an upper end cover (1 1'), are correspondingly configured for this.
  • the heating device comprises a striated area (23) in correspondence with the inner wall (9.1 ') to improve heat generation, and more specifically with an internal surface of said inner wall (9.1'), as is appreciable in Figure 16.
  • the inner wall (9.1 ') has one of these striated areas (23) for each of the longitudinal grooves (7') of the cylindrical body (4 ').
  • each of the longitudinal grooves (7 ') is wrapped radially and externally by one of the striated areas (23).
  • the heating device comprises at least one bearing (24) for the rotation of the cylindrical body (4 ').
  • the end caps (10 ', 11') have a housing (25) to accommodate the bearings (24).
  • one of the bearings (24) is arranged in correspondence with one of the free ends of the cylindrical body (4 ') and another in correspondence with the shaft (6') fixed at the other free end of the cylindrical body ( 4').
  • the amount of the cylindrical bodies (4 ') included in the heating device is determined being allowed a contribution in the rotation of the same between them by the magnetic fields generated by the magnets (2) of each one of them. In this way, the amount of the cylindrical bodies (4 ') included in the heating device can be two, as can be seen, for example, through figures 17 and 20, six, etc.
  • the cylindrical bodies (4 ') included in the heating device are spaced apart from each other according to a distance that allows an interaction between the magnetic fields generated by the magnets (2) of each of the cylindrical bodies (4') with each other. . In this way, a consumption associated with the actuation of the cylindrical bodies (4 ') for its rotation is reduced.
  • the housing (9 ') associated with each of the cylindrical bodies (4') enhances the effect of the magnets (2) located inside. Being two the cylindrical bodies (4 ') included in the heating device, said device entails an increase in the number of at least some of the elements associated with each of the cylindrical bodies (4'), as is observable in figures 17 and 20.
  • the heating device comprises a spindle (26) for each of the axes (6 '), a bar (27), tension adjustment means (28) comprising a fixed part (28.1) and a moving part (28.2 ) movable with respect to the fixed part (28.1), and movement transmission means (29), such as belts or chains.
  • tension adjustment means comprising a fixed part (28.1) and a moving part (28.2 ) movable with respect to the fixed part (28.1
  • movement transmission means such as belts or chains.
  • the clamping means (18) are also included in the heating device to establish the fixing and release, quickly and easily, between each of the axes (6 ') and the corresponding spindle (26), in addition to the rod (27) and an output shaft (30) of the motor itself or the conventional means of rotary drive included in the heating device. Accordingly, by means of the output shaft (30) a turn is transmitted to the bar (27). The rotation received by the bar (27) is transmitted to each of the spindles (26) by means of motion transmission means (29). The rotation received by the bar (27) is transmitted to each of the spindles (26) by means of motion transmission means (29).
  • the movable part (28.2) is arranged with respect to the fixed part (28.1) so that the movement transmission means (29 ) are in a state of tension due to tensile stress.
  • the rotation received by each of the spindles (26) is transmitted to the corresponding axis (6 '), which in turn transmits the rotation to the cylindrical body (4') to which it is fixed.
  • the output shaft (30) crosses one of the two end caps (10'), specifically the lower end cap (10 ').
  • the axes (6 ') pass through the lower end cover (10') to contact the spindles (26) and the output shaft (30) passes through said cover (10 ') to contact the bar (27).
  • one of the discs (5) with their respective magnets (3) can be arranged in each of the axes (6 ') on the face facing the cylindrical body (4') to increase the heating at the corresponding end of said cylindrical body (4 ').
  • each of the end caps (10 ', 1 1') has an inlet hole (31) for fluid inlet to one of the coils (1 ') and an outlet hole (32) for the outlet of the fluid of one of the coils (1 ').
  • the inlet hole (31) is arranged in correspondence with one of the cylindrical bodies (4 '), close to its spindle (26), and the exit hole (32) in correspondence with the other of the cylindrical bodies (4'), close to its spindle (26).
  • the other of the end caps (1 1 '), the upper end cover (1 1') also has the inlet hole (31) and the outlet hole (32) for communication of both coils (1 ') .

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

The invention relates to a device for heating by magnetic induction, comprising a cylindrical body (4, 4') which can be actuated in rotation and provided with magnets (2) arranged longitudinally on the periphery of the cylindrical body (4, 4') according to a distribution with alternating polarities of the successive magnets (2) in the distribution, a coil (1, 1') being arranged around said cylindrical body (4, 4') for the circulation of a fluid to be heated, where the coil (1, 1') is housed in a casing (9, 9') of an electrically conductive and thermally conductive material, in which heat is generated by the magnetic influence of the magnets (2) in movement, said heat being transmitted to the coil (1, 1').

Description

DESCRIPCIÓN  DESCRIPTION
DISPOSITIVO DE CALENTAMIENTO POR INDUCCIÓN MAGNÉTICA Sector de la técnica MAGNETIC INDUCTION HEATING DEVICE Technical sector
La presente invención está relacionada con la generación de calor para aplicaciones de calentamiento, como por ejemplo para obtener agua caliente, proponiendo un dispositivo de producción de calor mediante inducción magnética, con el cual se puede desarrollar dicha función en unas condiciones mejoradas de eficacia y rentabilidad. The present invention is related to the generation of heat for heating applications, such as for obtaining hot water, by proposing a device for producing heat by magnetic induction, with which said function can be developed under improved conditions of efficiency and profitability. .
Estado de la técnica State of the art
Es conocido que, cuando en el ámbito del campo magnético de un imán en movimiento se dispone un elemento de material conductor eléctrico, la influencia del campo magnético variable que actúa sobre dicho elemento genera en él un calor que le produce un calentamiento. It is known that when an element of electric conductive material is disposed within the scope of a moving magnet, the influence of the variable magnetic field acting on said element generates heat in it that produces heating.
Basándose en ese fenómeno, se han desarrollado soluciones orientadas al calentamiento de fluidos, como por ejemplo agua circulante por un tubo de cobre u otro material conductor, disponiéndose en relación con el tubo un disco portador de una distribución de imanes, asociando el disco a un motor de accionamiento giratorio. Based on this phenomenon, solutions oriented to the heating of fluids have been developed, such as, for example, water circulating through a copper tube or other conductive material, with a tube carrying a magnet distribution being arranged in relation to the tube, associating the disk with a rotary drive motor.
Soluciones de este tipo son, por ejemplo, las contempladas en los documentos ES1077579U, US2549362, US20090223948, US5012060, US7339144, US8408378 y US201 10272399, todas ellas basadas en la utilización de un soporte portador de imanes accionado giratoriamente por un motor, para crear mediante los imanes en movimiento un campo magnético variable en relación con un tubo metálico de circulación de un fluido. Pero tales soluciones no han tenido éxito de implantación práctica, debido al bajo rendimiento de producción de calor en relación con el consumo de energía necesario para accionar el soporte portador de los imanes. Solutions of this type are, for example, those contemplated in documents ES1077579U, US2549362, US20090223948, US5012060, US7339144, US8408378 and US201 10272399, all based on the use of a magnet carrier support rotatably driven by a motor, to be created by the magnets in motion a variable magnetic field in relation to a metallic tube of circulation of a fluid. But such solutions have not been successful in practical implementation, due to the low heat production performance in relation to the energy consumption necessary to drive the carrier support of the magnets.
La solicitud de Patente española P201431476, de la misma solicitante que la presente invención, contempla una realización para mejorar el rendimiento de la producción de calor por inducción magnética mediante imanes en movimiento, empleando dos o más discos giratorios portadores de imanes, dispuestos de manera que los imanes de los discos consecutivos se influencian favoreciendo el accionamiento giratorio de los discos. Esta solución requiere sin embargo un exacto sincronismo del movimiento de los discos para que la influencia magnética entre ellos sea adecuada, lo cual dificulta y encarece el montaje. Spanish patent application P201431476, of the same applicant as the present invention, contemplates an embodiment to improve the performance of magnetic induction heat production by means of moving magnets, using two or more discs rotating magnet carriers, arranged so that the magnets of the consecutive discs are influenced by favoring the rotary actuation of the discs. This solution requires, however, an exact synchronism of the movement of the disks so that the magnetic influence between them is adequate, which makes assembly difficult.
El documento JP2004316943 plantea otra realización al respecto, utilizando un cuerpo cilindrico giratorio portador de imanes dispuestos longitudinalmente en su periferia, yendo alrededor del cuerpo cilindrico un serpentín de circulación de un fluido a calentar. Por la dimensión de los imanes que se utilizan, esta solución es más eficaz que la de un disco portador de imanes en donde la dimensión de los imanes está muy limitada. Sin embargo, el rendimiento de la producción de calor es también bajo en relación con el consumo de energía que se requiere para accionar el movimiento giratorio del cuerpo cilindrico portador de los imanes. Objeto de la invención JP2004316943 presents another embodiment in this regard, using a rotating cylindrical body bearing magnets arranged longitudinally at its periphery, a coil of circulation of a fluid to be heated going around the cylindrical body. Due to the size of the magnets used, this solution is more effective than that of a magnet carrier disk where the dimension of the magnets is very limited. However, the heat production efficiency is also low in relation to the energy consumption required to drive the rotating movement of the cylindrical body carrying the magnets. Object of the invention
De acuerdo con la presente invención se propone un dispositivo para generar calor por inducción magnética mediante imanes en movimiento, con una realización que permite mejorar el rendimiento de las soluciones conocidas en ese sentido y, por consiguiente, las prestaciones de aplicación. In accordance with the present invention, a device for generating heat by magnetic induction by means of moving magnets is proposed, with an embodiment that allows to improve the performance of the solutions known in that direction and, consequently, the application performance.
El dispositivo objeto de la invención comprende un cuerpo cilindrico que es acoplable axialmente a un medio de accionamiento giratorio, yendo provisto el cuerpo cilindrico en su periferia con una distribución de imanes longitudinales de polaridades alternas en la distribución, y yendo alrededor de dicho cuerpo cilindrico un serpentín de circulación de un fluido a calentar. The device object of the invention comprises a cylindrical body that is axially attachable to a rotating actuating means, the cylindrical body being provided at its periphery with a distribution of longitudinal magnets of alternating polarities in the distribution, and going around said cylindrical body a circulation coil of a fluid to be heated.
Según la invención, el serpentín que rodea al cuerpo cilindrico portador de los imanes se aloja dentro de una carcasa metálica de un material conductor eléctrico y conductor térmico, la cual determina una masa de acumulación del calor que produce el movimiento de los imanes incorporados en el cuerpo cilindrico, para transmitir dicho calor al serpentín de circulación del fluido a calentar. According to the invention, the coil that surrounds the cylindrical body carrying the magnets is housed within a metal housing of an electrical conductive material and thermal conductor, which determines a mass of heat accumulation that produces the movement of the magnets incorporated in the cylindrical body, to transmit said heat to the circulation coil of the fluid to be heated.
Se obtiene de esta manera una realización que, debido a la dimensión de los imanes incorporados en el cuerpo cilindrico, produce una gran influencia magnética generadora de calor sobre la carcasa que aloja al serpentín de circulación del fluido a calentar y, por otro lado, debido al efecto acumulador térmico de dicha carcasa que aloja al serpentín, se logra también un máximo aprovechamiento de la influencia magnética de los imanes para el calentamiento del serpentín. An embodiment is thus obtained which, due to the size of the magnets incorporated in the cylindrical body, produces a great magnetic influence generating heat on the housing that houses the circulation coil of the fluid to be heated and, on the other hand, due to the thermal accumulating effect of said housing that houses the coil, maximum utilization of the magnetic influence of the magnets for the heating of the heat is also achieved coil.
En el eje de accionamiento giratorio del cuerpo cilindrico se dispone además un disco provisto en la cara orientada hacia el cuerpo cilindrico con una distribución de imanes radiales, también de polaridades alternas en su distribución. Con lo cual, mediante el accionamiento giratorio se logra un complemento de influencia magnética sobre la carcasa que aloja al serpentín de circulación del fluido a calentar y, por consiguiente del calor que se produce para calentar el serpentín, siendo dicho complemento también de una notable intensidad debido a la dimensión de los imanes dispuestos radialmente en el disco. In the rotary drive shaft of the cylindrical body there is also a disk provided on the face facing the cylindrical body with a distribution of radial magnets, also of alternating polarities in its distribution. Thus, by means of the rotary drive, a complement of magnetic influence is achieved on the housing that houses the circulation coil of the fluid to be heated and, consequently, of the heat that is produced to heat the coil, said complement also being of a remarkable intensity due to the dimension of the magnets arranged radially on the disk.
Según otro ejemplo de realización del dispositivo objeto de la presente invención, el cuerpo cilindrico comprende unos medios de acople para acople de unos medios de fijación, de forma que estando los medios de fijación acoplados en los medios de acople y los imanes alojados en unas ranuras longitudinales que tiene el cuerpo cilindrico, partes extremas de las ranuras longitudinales quedan externamente cubiertas quedando retenidos los imanes en las ranuras longitudinales. Preferentemente, los medios de acople son roscas externas y los medios de fijación son casquillos cilindricos con una rosca interna, de forma que es establecible un acople por enroscado de los medios de fijación en los medios de acople. According to another embodiment of the device object of the present invention, the cylindrical body comprises coupling means for coupling of fixing means, so that the fixing means are coupled in the coupling means and the magnets housed in slots lengths that the cylindrical body has, end portions of the longitudinal grooves are externally covered, the magnets being retained in the longitudinal grooves. Preferably, the coupling means are external threads and the fixing means are cylindrical bushes with an internal thread, so that a threaded coupling of the fixing means in the coupling means is stable.
El dispositivo de calentamiento por inducción magnética comprende el eje accionable en giro y unos medios de apriete, de forma que mediante los medios de apriete es establecible una fijación por apriete entre el cuerpo cilindrico y el eje. Así, se puede fijar y liberar el eje con respecto al cuerpo cilindrico de manera rápida y sencilla. The magnetic induction heating device comprises the rotationally actuated shaft and a means of tightening, so that by means of the tightening means a tightening fixation between the cylindrical body and the axis is stable. Thus, the shaft can be fixed and released with respect to the cylindrical body quickly and easily.
El serpentín está definido por un surco en una superficie externa de una de las paredes junto con una superficie interna de la otra de las paredes. De esta manera se reduce el número de elementos a ser empleados y se maximiza la trasmisión de calor de la carcasa al fluido del serpentín. Preferentemente, el surco se desarrolla de acuerdo a una trayectoria helicoidal rodeando externamente la pared en la que se localiza. Así, se aumenta el tiempo de exposición del fluido al calor de la carcasa en su paso por dicho serpentín. El dispositivo de calentamiento objeto de la presente invención comprende al menos una zona estriada en correspondencia con una superficie interna de una de las paredes para envolver radial y externamente las ranuras longitudinales del cuerpo cilindrico. Mediante las zonas estriadas se mejora la generación de calor en la carcasa metálica de material conductor eléctrico y conductor térmico. The coil is defined by a groove on an external surface of one of the walls along with an internal surface of the other of the walls. In this way the number of elements to be used is reduced and the transmission of heat from the housing to the coil fluid is maximized. Preferably, the groove develops according to a helical path externally surrounding the wall in which it is located. Thus, the exposure time of the fluid to the heat of the housing in its passage through said coil is increased. The heating device object of the present invention comprises at least one striated area in correspondence with an internal surface of one of the walls to radially and externally wrap the longitudinal grooves of the cylindrical body. By means of the striated areas, the generation of heat in the metal housing of electrical conductive material and thermal conductor is improved.
Preferentemente, el dispositivo de calentamiento por inducción magnética comprende dos de los cuerpos cilindricos, estando los cuerpos cilindricos separados entre sí de acuerdo a una distancia que permite una interacción entre campos magnéticos generados por los imanes de cada uno de los cuerpos cilindricos entre sí, de forma que el giro de uno de los cuerpos cilindricos contribuye en el giro del otro de los cuerpos cilindricos. De esta manera se obtiene una reducción en el consumo de energía que se requiere para accionar el movimiento giratorio de los cuerpos cilindricos portadores de los imanes. Preferably, the magnetic induction heating device comprises two of the cylindrical bodies, the cylindrical bodies being separated from each other according to a distance that allows an interaction between magnetic fields generated by the magnets of each of the cylindrical bodies of each other, of so that the rotation of one of the cylindrical bodies contributes to the rotation of the other of the cylindrical bodies. In this way, a reduction in the energy consumption that is required to drive the rotating movement of the cylindrical bodies bearing the magnets is obtained.
Por lo tanto, dicho dispositivo objeto de la invención resulta de unas características que le hacen eficazmente ventajoso para la función a la que está destinado, adquiriendo vida propia y carácter preferente respecto de los dispositivos convencionales de la misma aplicación, ya que mejora las condiciones funcionales y el rendimiento de los mismos. Therefore, said device object of the invention results in characteristics that make it effectively advantageous for the function to which it is intended, acquiring its own life and preferential character with respect to conventional devices of the same application, since it improves the functional conditions. and their performance.
Descripción de las figuras Description of the figures
La figura 1 muestra en perspectiva un ejemplo de realización del dispositivo objeto de la invención. Figure 1 shows in perspective an embodiment of the device object of the invention.
La figura 2 muestra una perspectiva del dispositivo de la figura anterior, con la carcasa de alojamiento del serpentín de circulación del fluido a calentar diametralmente seccionada, habiéndose eliminado los imanes del cuerpo cilindrico y del disco incorporados en un eje giratorio. Figure 2 shows a perspective of the device of the previous figure, with the housing of the circulation coil of the fluid to be heated diametrically sectioned, the magnets of the cylindrical body and the disk incorporated in a rotating shaft having been removed.
La figura 3 es una perspectiva del conjunto del cuerpo cilindrico y el disco incorporados en un eje giratorio, sin los imanes de los mismos. Figure 3 is a perspective view of the assembly of the cylindrical body and the disk incorporated in a rotating shaft, without the magnets thereof.
La figura 4 es una perspectiva como la anterior, con el cuerpo cilindrico y el disco provistos de sus imanes. La figura 5 es una perspectiva de la pared interna y la tapa inferior de la carcasa de alojamiento del serpentín en el dispositivo de la invención. Figure 4 is a perspective like the previous one, with the cylindrical body and the disk provided with their magnets. Figure 5 is a perspective of the inner wall and the bottom cover of the housing of housing of the coil in the device of the invention.
La figura 6 es una perspectiva como la anterior, con algunas mitades de soportes radiales de sujeción del serpentín en la carcasa de alojamiento. Figure 6 is a perspective like the previous one, with some halves of radial supports for holding the coil in the housing.
La figura 7 es una perspectiva como la de la figura anterior con el serpentín incorporado sobre las mitades de los soportes radiales. Figure 7 is a perspective like that of the previous figure with the coil incorporated on the halves of the radial supports.
La figura 8 es una perspectiva como la de la figura anterior con los soportes radiales de sujeción completos con las dos mitades. Figure 8 is a perspective like that of the previous figure with the radial support brackets complete with the two halves.
La figura 9 es una perspectiva de la carcasa de alojamiento del serpentín completa, sin la tapa superior. La figura 10 muestra el cuerpo cilindrico según otro ejemplo de realización del dispositivo objeto de la invención. Figure 9 is a perspective of the housing of the complete coil housing, without the top cover. Figure 10 shows the cylindrical body according to another embodiment of the device object of the invention.
La figura 1 1 muestra una vista del cuerpo cilindrico y el eje giratorio según el otro ejemplo de realización. Figure 1 1 shows a view of the cylindrical body and the rotating shaft according to the other embodiment.
La figura 12 muestra una sección del cuerpo cilindrico y el eje giratorio a lo largo de una línea A-A incluida en la figura 11. Figure 12 shows a section of the cylindrical body and the rotating shaft along an A-A line included in Figure 11.
La figura 13 muestra otra vista del cuerpo cilindrico y el eje giratorio según el otro ejemplo de realización. Figure 13 shows another view of the cylindrical body and the rotating shaft according to the other embodiment.
La figura 14 muestra una sección del cuerpo cilindrico y el eje giratorio a lo largo de una línea B-B incluida en la figura 13. La figura 15 muestra la pared interna de la carcasa según el otro ejemplo de realización. Figure 14 shows a section of the cylindrical body and the rotating shaft along a line B-B included in Figure 13. Figure 15 shows the internal wall of the housing according to the other embodiment.
La figura 16 muestra una sección de la pared interna de la carcasa a lo largo de una línea C- C incluida en la figura 15. La figura 17 muestra una vista explosionada del dispositivo objeto de la presente invención comprendiendo dos de los cuerpos cilindricos según el otro ejemplo de realización. Figure 16 shows a section of the internal wall of the housing along a line C-C included in Figure 15. Figure 17 shows an exploded view of the device object of the present invention comprising two of the cylindrical bodies according to the other embodiment.
La figura 18 muestra una sección del dispositivo objeto de la presente invención a lo largo de una línea D-D incluida en la figura 17. Figure 18 shows a section of the device object of the present invention along a D-D line included in Figure 17.
La figura 19 muestra una vista inferior del dispositivo objeto de la presente invención comprendiendo dos de los cuerpos cilindricos según el otro ejemplo de realización. Figure 19 shows a bottom view of the device object of the present invention comprising two of the cylindrical bodies according to the other embodiment.
La figura 20 muestra una sección del dispositivo objeto de la presente invención a lo largo de una línea E-E incluida en la figura 19. Figure 20 shows a section of the device object of the present invention along an E-E line included in Figure 19.
Descripción detallada de la invención Detailed description of the invention
El objeto de la invención se refiere a un dispositivo destinado para calentar un fluido circulante por un serpentín (1) de cobre, u otro material conductor térmico, mediante generación de calor por inducción magnética de unos imanes (2 y 3) que van incorporados en un cuerpo cilindrico (4) y en un disco (5), los cuales a su vez van dispuestos sobre un eje (6) que es accionable en giro mediante un motor, o cualquier otro medio convencional de accionamiento giratorio. The object of the invention relates to a device intended to heat a circulating fluid by a coil (1) of copper, or other thermal conductive material, by generating heat by magnetic induction of magnets (2 and 3) that are incorporated in a cylindrical body (4) and a disk (5), which in turn are arranged on a shaft (6) that is rotatable by means of a motor, or any other conventional means of rotary drive.
El dispositivo comprende una distribución de imanes (2) dispuestos longitudinalmente en la periferia del cuerpo cilindrico (4), con polaridades alternas de los sucesivos imanes (2) en la distribución, yendo dichos imanes (2) encajados en unas ranuras (7) longitudinales que el cuerpo cilindrico (4) tiene en su periferia. The device comprises a distribution of magnets (2) arranged longitudinally on the periphery of the cylindrical body (4), with alternating polarities of the successive magnets (2) in the distribution, said magnets (2) being fitted in longitudinal grooves (7) that the cylindrical body (4) has on its periphery.
Otra distribución de imanes (3) está prevista en una disposición radial en el disco (5), a su vez con polaridades alternas de los sucesivos imanes (3) en la distribución, yendo dichos imanes (3) encajados en unas ranuras (8) radiales que el disco (5) tiene en su cara orientada hacia el cuerpo cilindrico (4). Another distribution of magnets (3) is provided in a radial arrangement in the disk (5), in turn with alternate polarities of the successive magnets (3) in the distribution, said magnets (3) being fitted in slots (8) radial that the disc (5) has on its face oriented towards the cylindrical body (4).
Alrededor del cuerpo cilindrico (4) va dispuesta una carcasa (9) de material conductor eléctrico y conductor térmico, como por ejemplo bronce, sin que este material sea limitativo, alojándose dentro de dicha carcasa (9) el serpentín (1) de circulación del fluido a calentar. La carcasa (9) comprende dos paredes (9.1 y 9.2) cilindricas concéntricas y dos tapas extremas (10 y 1 1) que cierran las dos paredes (9.1 y 9.2). A través de una de las (10) pasa el eje (6) al que están unidos el cuerpo cilindrico (4) portador de los imanes (2) y el disco (5) portador de los imanes (3), yendo el serpentín (1) incluido entre las dos paredes (9.1 y 9.2), en sujeción respecto de ellas mediante unos soportes (12) radiales que van unidos a las paredes (9.1 y 9.2). Around the cylindrical body (4) there is arranged a housing (9) of electrical conductive material and thermal conductor, such as bronze, without this material being limiting, with the said circulation coil (1) housed inside said housing (9). fluid to heat. The housing (9) comprises two concentric cylindrical walls (9.1 and 9.2) and two covers extremes (10 and 1 1) that close the two walls (9.1 and 9.2). Through one of the (10) passes the shaft (6) to which the cylindrical body (4) carrying the magnets (2) and the disk (5) carrying the magnets (3) are attached, the coil ( 1) included between the two walls (9.1 and 9.2), attached to them by means of radial supports (12) that are attached to the walls (9.1 and 9.2).
Los soporte (12) están formados por dos mitades complementarias que se disponen unidas respectivamente a las paredes (9.1 y 9.2) de la carcasa (9), encajando en unas ranuras (13) que dichas paredes (9.1 y 9.2) tienen longitudinalmente en sus respectivas caras enfrentadas de la una hacia la otra, mientras que en sus bordes enfrentados entre ellas dichas mitades complementarias de los soportes (12) tienen unas escotaduras (14) mediante las se acoplan sobre las espiras del serpentín (1). The supports (12) are formed by two complementary halves that are arranged respectively attached to the walls (9.1 and 9.2) of the housing (9), fitting into grooves (13) that said walls (9.1 and 9.2) have longitudinally in their respective faces facing each other, while at their opposite edges between them said complementary halves of the supports (12) have recesses (14) by coupling them on the coils of the coil (1).
Las tapas (10, 1 1) se unen a la carcasa (9) mediante unos tornillos (15) de un material no magnético, como por ejemplo bronce, de manera que dichos tornillos (15) no se ven influenciados por los campos magnéticos impidiéndose que puedan aflojarse. The covers (10, 1 1) are connected to the housing (9) by means of screws (15) of a non-magnetic material, such as bronze, so that said screws (15) are not influenced by the magnetic fields preventing They can loosen up.
Con todo ello así el montaje estructural de la carcasa (9) y la incorporación del serpentín (1) en ella resultan muy sencillos, y disponiendo un número elevado de soportes (12) en la sujeción del serpentín (1), el conjunto de dicha carcasa (9) determina una masa muy compacta que favorece el aprovechamiento de la influencia magnética de los imanes (2 y 3), cuando giran el cuerpo cilindrico (4) y el disco (5), para generar un calor que se transmite con gran eficiencia al serpentín (1) a efectos de calentar el fluido de aplicación circulante por el mismo. With all this, the structural assembly of the housing (9) and the incorporation of the coil (1) in it are very simple, and having a large number of supports (12) in the fastening of the coil (1), the assembly of said housing (9) determines a very compact mass that favors the use of the magnetic influence of the magnets (2 and 3), when the cylindrical body (4) and the disk (5) rotate, to generate heat that is transmitted with great efficiency to the coil (1) in order to heat the circulating application fluid therein.
Según otro ejemplo de realización, el dispositivo destinado para calentar un fluido mediante generación de calor por inducción magnética comprende el cuerpo cilindrico (4'), teniendo dicho cuerpo cilindrico (4') las ranuras (7') longitudinales para recepción de los imanes (2) en el cuerpo cilindrico (4'), además de unos medios de acople (16). Los primeros medios de acople (16) son para acople de unos medios de fijación (17), los cuales son comprendidos en el dispositivo de calentamiento para mantener los imanes (2) del cuerpo cilindrico (4') en las ranuras (7') longitudinales. According to another embodiment, the device designed to heat a fluid by generating heat by magnetic induction comprises the cylindrical body (4 '), said cylindrical body (4') having the longitudinal grooves (7 ') for receiving the magnets ( 2) in the cylindrical body (4 '), in addition to coupling means (16). The first coupling means (16) are for coupling fixing means (17), which are included in the heating device to keep the magnets (2) of the cylindrical body (4 ') in the grooves (7') Longitudinal
Preferentemente, las ranuras (7') longitudinales están configuradas para disposición de dos de los imanes (2) del cuerpo cilindrico (4') enfrentados entre sí y en correspondencia tanto con la periferia como con una zona central del cuerpo cilindrico (4'). También de manera preferente, las ranuras (7') longitudinales son diametralmente pasantes. De acuerdo con esto, en cada una de las ranuras (7') longitudinales se disponen dos de los imanes (2) radialmente enfrentados entre sí. El cuerpo cilindrico (4') está dimensionado diametralmente en función de la medida diametral que presentan los imanes (2) de las ranuras (7') longitudinales de manera conjunta. Este otro ejemplo de realización permite reducir en gran medida las dimensiones diametrales y el peso total del cuerpo cilindrico (4'), lo cual facilita su giro. Los medios de acople (16) se localizan próximos a unas partes extremas de las ranuras (7') longitudinales. Asimismo, los medios de fijación (17) están configurados para que mediante su acople en los medios de acople (16), sólo las partes extremas de las ranuras (7') longitudinales queden tapadas o cubiertas por dichos medios de fijación (17), es decir radial y externamente envueltas. De esta forma, los imanes (2) alojados en las ranuras (7') longitudinales quedan impedidos de salirse del cuerpo cilindrico (4'), y más concretamente de dichas ranuras (7') longitudinales, por contacto de los imanes (2) con los medios de fijación (17). Una parte longitudinal central de los imanes (2) queda libre, es decir no perimetralmente envuelta por los medios de fijación (17). De hecho, estando los medios de fijación (17) acoplados en los medios de acople (16) la mayor parte de dichas ranuras (7') longitudinales, y por tanto también de los imanes (2) alojados en dichas ranuras (7'), quedan libres o externamente no tapadas por los medios de fijación (17). Preferably, the longitudinal grooves (7 ') are configured for arrangement of two of the magnets (2) of the cylindrical body (4') facing each other and correspondingly with the periphery as with a central area of the cylindrical body (4 '). Also preferably, the longitudinal grooves (7 ') are diametrically through. Accordingly, in each of the longitudinal grooves (7 ') two of the magnets (2) are arranged radially facing each other. The cylindrical body (4 ') is diametrically sized according to the diametral measurement of the magnets (2) of the longitudinal grooves (7') together. This other embodiment allows to reduce greatly the diametral dimensions and the total weight of the cylindrical body (4 '), which facilitates its rotation. The coupling means (16) are located close to end portions of the longitudinal grooves (7 '). Likewise, the fixing means (17) are configured so that by coupling them in the coupling means (16), only the end portions of the longitudinal grooves (7 ') are covered or covered by said fixing means (17), that is radially and externally wrapped. In this way, the magnets (2) housed in the longitudinal grooves (7 ') are prevented from leaving the cylindrical body (4'), and more specifically of said longitudinal grooves (7 '), by contact of the magnets (2) with the fixing means (17). A central longitudinal part of the magnets (2) is free, that is not perimetrically wrapped by the fixing means (17). In fact, the fixing means (17) being coupled in the coupling means (16) most of said longitudinal grooves (7 '), and therefore also of the magnets (2) housed in said grooves (7') , are free or externally not covered by the fixing means (17).
De acuerdo con el ejemplo mostrado en las figuras, preferentemente los medios de acople (16) son roscas externas dispuestas en el cuerpo cilindrico (4'), y los medios de fijación (17) son casquillos cilindricos con una rosca interna. Así, el cuerpo cilindrico (4') está dimensionado de acuerdo a diferentes diámetros, siendo el diámetro mayor en una parte longitudinal media que en una parte próxima a un extremo libre. En el ejemplo mostrado en las figuras, las ranuras (7') longitudinales del cuerpo cilindrico (4') son dos. De acuerdo con esto, los medios de acople (16) están dimensionados de acuerdo a un diámetro externo del cuerpo cilindrico (4') mayor en la parte longitudinal media que en la parte próxima a cada uno de los extremos libres del cuerpo cilindrico (4'). According to the example shown in the figures, preferably the coupling means (16) are external threads arranged in the cylindrical body (4 '), and the fixing means (17) are cylindrical bushes with an internal thread. Thus, the cylindrical body (4 ') is sized according to different diameters, the diameter being larger in an average longitudinal part than in a part near a free end. In the example shown in the figures, the longitudinal grooves (7 ') of the cylindrical body (4') are two. Accordingly, the coupling means (16) are sized according to an external diameter of the cylindrical body (4 ') larger in the middle longitudinal part than in the part close to each of the free ends of the cylindrical body (4 ').
Así, el cuerpo cilindrico (4') es insertable a través de los medios de fijación (17) destinados a acoplarse en los medios de acople (16) localizados en la parte longitudinal media del cuerpo cilindrico (4') hasta que dichos medios de fijación (17) son acoplables en dichos medios de acople (16); mientras que el cuerpo cilindrico (4') es insertable a través de los medios de fijación (17) destinados a acoplarse en los medios de acople (16) localizados la parte próxima a cada uno de los extremos libres del cuerpo cilindrico (4') sólo hasta que dichos medios de fijación (17) son acoplables en dichos medios de acople (16). De esta forma se aporta un montaje simple e inequívoco. Thus, the cylindrical body (4 ') is insertable through the fixing means (17) intended to be coupled in the coupling means (16) located in the middle longitudinal part of the cylindrical body (4') until said means of fixing (17) are attachable in said means of coupling (16); while the cylindrical body (4 ') is insertable through the fixing means (17) intended to engage in the coupling means (16) located the part close to each of the free ends of the cylindrical body (4') only until said fixing means (17) are attachable in said coupling means (16). In this way a simple and unequivocal assembly is provided.
En caso de ser tres o más las ranuras (7') longitudinales incluidas en el cuerpo cilindrico (4'), el diámetro del cuerpo cilindrico (4') se ve reducido según se trata de una parte del mismo más próxima a sus extremos libres. La configuración descrita es adaptada de acuerdo con el número de las ranuras (7') longitudinales incluidas en el cuerpo cilindrico (4'). If there are three or more longitudinal grooves (7 ') included in the cylindrical body (4'), the diameter of the cylindrical body (4 ') is reduced as it is a part of it closest to its free ends . The described configuration is adapted according to the number of the longitudinal grooves (7 ') included in the cylindrical body (4').
El dispositivo de calentamiento comprende unos medios de apriete (18). Preferentemente los medios de apriete (18) incluyen un agujero roscado pasante y un elemento roscado enroscable en el agujero roscado pasante; y más preferentemente son varios los agujeros roscados pasantes y los elementos roscados, como por ejemplo tres de cada uno. The heating device comprises clamping means (18). Preferably, the tightening means (18) include a through threaded hole and a threaded threaded element in the through threaded hole; and more preferably there are several through threaded holes and threaded elements, such as three of each.
Mediante dichos medios de apriete (18) se establece una fijación y una liberación, de manera rápida y sencilla, entre dos elementos diferentes, por ejemplo entre el eje (6') accionable en giro y el cuerpo cilindrico (4'). Uno de estos medios de apriete (18) se localiza en el eje (6') para, una vez dispuesto uno de los extremos libres del cuerpo cilindrico (4') acoplado en un extremo de dicho eje (6'), preferentemente por inserción, fijar por apriete la posición relativa del cuerpo cilindrico (4') con respecto al eje (6') mediante el elemento roscado previo paso a través del eje (6'). El serpentín (1 ') se localiza dentro de la carcasa (9') entre las dos paredes (9.1', 9.2'), una pared interna (9.1 ') y una pared externa (9.2'). Más concretamente, el serpentín (1 ') se encuentra entre las dos paredes (9.1 ', 9.2') rodeando al cuerpo cilindrico (4'), estando definido directamente por dichas dos paredes (9.1 ', 9.2') de manera conjunta, tal y como es apreciable en la figura 20. El serpentín (1 ') está definido por un surco en una superficie externa de la pared interna (9.1 ') por el que puede circular el fluido a ser calentado, tal y como es apreciable en las figuras 15 y 16, y por una superficie interna de la pared externa (9.2'). De esta manera se reduce el número de elementos a ser empleados y se maximiza la trasmisión de calor de la carcasa (9') de material conductor eléctrico y conductor térmico al fluido del serpentín (1 '). El surco se desarrolla de acuerdo a una trayectoria helicoidal para aumentar el tiempo de exposición del fluido al calor generado en la carcasa (9') en su paso por dicho serpentín (V). El surco tiene unas crestas (19) que se proyectan externamente con respecto a la superficie externa de la pared interna (9.1') en menor medida que unos laterales (20) que definen lateralmente el serpentín (1 '). Las crestas (19) aumentan la superficie de contacto entre la pared interna (9.1 ') y el fluido a ser calentado para una mayor transmisión del calor generado en dicha pared interna (9.1 ') por el giro de los imanes (2) del cuerpo cilindrico (4'). By means of said tightening means (18) a fixation and release is established, quickly and easily, between two different elements, for example between the axis (6 ') rotatable and the cylindrical body (4'). One of these clamping means (18) is located on the shaft (6 ') so that, once one of the free ends of the cylindrical body (4') is arranged, coupled to one end of said shaft (6 '), preferably by insertion , tighten the relative position of the cylindrical body (4 ') with respect to the axis (6') by means of the threaded element before passing through the axis (6 '). The coil (1 ') is located inside the housing (9') between the two walls (9.1 ', 9.2'), an internal wall (9.1 ') and an external wall (9.2'). More specifically, the coil (1 ') is between the two walls (9.1', 9.2 ') surrounding the cylindrical body (4'), being defined directly by said two walls (9.1 ', 9.2') together, such and as is appreciable in Figure 20. The coil (1 ') is defined by a groove in an outer surface of the inner wall (9.1') through which the fluid to be heated can circulate, as is appreciable in the Figures 15 and 16, and by an inner surface of the outer wall (9.2 '). In this way the number of elements to be used is reduced and the heat transmission of the housing (9 ') of electrical conductive material and thermal conductor to the coil fluid (1') is maximized. The groove develops according to a helical path to increase the exposure time of the fluid to the heat generated in the housing (9 ') as it passes through said coil (V). The groove has ridges (19) that project externally with respect to the outer surface of the inner wall (9.1 ') to a lesser extent than lateral ones (20) that laterally define the coil (1'). The ridges (19) increase the contact surface between the inner wall (9.1 ') and the fluid to be heated for a greater transmission of the heat generated in said inner wall (9.1') by the rotation of the magnets (2) of the body cylindrical (4 ').
De acuerdo con esto, la pared interna (9.1 ') tiene una entrada (21) y una salida (22) para entrada y salida del fluido, tal y como es claramente apreciable en la figura 16. La entrada (22) se localiza en correspondencia con un extremo del serpentín (1 ') y la salida (22) en correspondencia con el otro extremo del serpentín (1 '). Asimismo, preferentemente la entrada (21) y la salida (22) están dispuestas de forma que el fluido entra al serpentín (1 ') y sale del mismo a través de las tapas extremas (10', 1 1'). Las tapas extremas (10', 1 1 '), es decir una tapa extrema inferior (10') y una tapa extrema superior (1 1 '), están correspondientemente configuradas para ello. Accordingly, the inner wall (9.1 ') has an inlet (21) and an outlet (22) for fluid inlet and outlet, as is clearly visible in Figure 16. The inlet (22) is located at correspondence with one end of the coil (1 ') and the outlet (22) in correspondence with the other end of the coil (1'). Likewise, preferably the inlet (21) and the outlet (22) are arranged so that the fluid enters the coil (1 ') and leaves it through the end caps (10', 1 1 '). The end caps (10 ', 1 1'), that is to say a lower end cover (10 ') and an upper end cover (1 1'), are correspondingly configured for this.
Adicionalmente, el dispositivo de calentamiento comprende una zona estriada (23) en correspondencia con la pared interna (9.1 ') para mejorar la generación de calor, y más concretamente con una superficie interna de dicha pared interna (9.1 '), tal y como es apreciable en la figura 16. Preferentemente, la pared interna (9.1 ') tiene una de estas zonas estriadas (23) por cada una de las ranuras (7') longitudinales del cuerpo cilindrico (4'). Estando el dispositivo de calentamiento en disposición de ser usado, cada una de las ranuras (7') longitudinales queda envuelta radial y externamente por una de las zonas estriadas (23). Additionally, the heating device comprises a striated area (23) in correspondence with the inner wall (9.1 ') to improve heat generation, and more specifically with an internal surface of said inner wall (9.1'), as is appreciable in Figure 16. Preferably, the inner wall (9.1 ') has one of these striated areas (23) for each of the longitudinal grooves (7') of the cylindrical body (4 '). The heating device being ready to be used, each of the longitudinal grooves (7 ') is wrapped radially and externally by one of the striated areas (23).
El dispositivo de calentamiento comprende al menos un cojinete (24) para el giro del cuerpo cilindrico (4'). Preferentemente, son dos los cojinetes (24) comprendidos en el dispositivo de calentamiento para el giro del cuerpo cilindrico (4'). Las tapas extremas (10', 11 ') tienen un alojamiento (25) para alojar los cojinetes (24). Así, mediante los cojinetes (24) el cuerpo cilindrico (4') es sujetado a la vez que es permitido su giro. De acuerdo con esto, uno de los cojinetes (24) es dispuesto en correspondencia con uno de los extremos libres del cuerpo cilindrico (4') y otro en correspondencia con el eje (6') fijado en el otro extremo libre del cuerpo cilindrico (4'). La cantidad de los cuerpos cilindricos (4') comprendidos en el dispositivo de calentamiento está determinada siendo permitida una contribución en el giro de los mismos entre sí mediante los campos magnéticos generados por los imanes (2) de cada uno de ellos. De esta manera, la cantidad de los cuerpos cilindricos (4') comprendidos en el dispositivo de calentamiento puede ser de dos, tal y como es apreciable por ejemplo a través de las figuras 17 y 20, de seis, etc. The heating device comprises at least one bearing (24) for the rotation of the cylindrical body (4 '). Preferably, there are two bearings (24) included in the heating device for the rotation of the cylindrical body (4 '). The end caps (10 ', 11') have a housing (25) to accommodate the bearings (24). Thus, by means of the bearings (24) the cylindrical body (4 ') is held while its rotation is allowed. Accordingly, one of the bearings (24) is arranged in correspondence with one of the free ends of the cylindrical body (4 ') and another in correspondence with the shaft (6') fixed at the other free end of the cylindrical body ( 4'). The amount of the cylindrical bodies (4 ') included in the heating device is determined being allowed a contribution in the rotation of the same between them by the magnetic fields generated by the magnets (2) of each one of them. In this way, the amount of the cylindrical bodies (4 ') included in the heating device can be two, as can be seen, for example, through figures 17 and 20, six, etc.
Los cuerpos cilindricos (4') comprendidos en el dispositivo de calentamiento están distanciados entre sí de acuerdo a una distancia que posibilita una interacción entre los campos magnéticos generados por los imanes (2) de cada uno de los cuerpos cilindricos (4') entre sí. De esta manera se disminuye un consumo asociado al accionamiento de los cuerpos cilindricos (4') para su giro. La carcasa (9') asociada a cada uno de los cuerpos cilindricos (4') potencia el efecto de los imanes (2) localizados en su interior. Siendo dos los cuerpos cilindricos (4') comprendidos en el dispositivo de calentamiento, dicho dispositivo conlleva un incremento en el número de, al menos, algunos de los elementos asociados a cada uno de los cuerpos cilindricos (4'), tal y como es observable en las figuras 17 y 20. Algunos de estos elementos son la carcasa (9'), los imanes (2), el eje (6'), los medios de fijación (17) y los medios de acople (16). Otros elementos, en cambio, no necesariamente deben verse incrementados en número. Siendo dos los cuerpos cilindricos (4') comprendidos en el dispositivo de calentamiento, mediante las dos tapas extremas (10', 1 1') se cierran conjuntamente las dos paredes (9.1', 9.2') de ambos cuerpos cilindricos (4'). The cylindrical bodies (4 ') included in the heating device are spaced apart from each other according to a distance that allows an interaction between the magnetic fields generated by the magnets (2) of each of the cylindrical bodies (4') with each other. . In this way, a consumption associated with the actuation of the cylindrical bodies (4 ') for its rotation is reduced. The housing (9 ') associated with each of the cylindrical bodies (4') enhances the effect of the magnets (2) located inside. Being two the cylindrical bodies (4 ') included in the heating device, said device entails an increase in the number of at least some of the elements associated with each of the cylindrical bodies (4'), as is observable in figures 17 and 20. Some of these elements are the housing (9 '), the magnets (2), the shaft (6'), the fixing means (17) and the coupling means (16). Other elements, on the other hand, should not necessarily be increased in number. With two cylindrical bodies (4 ') included in the heating device, the two walls (9.1', 9.2 ') of both cylindrical bodies (4') are closed together by the two end caps (10 ', 1 1'). .
El dispositivo de calentamiento comprende un husillo (26) por cada uno de los ejes (6'), una barra (27), unos medios de ajuste de tensión (28) que comprenden una parte fija (28.1) y una parte móvil (28.2) desplazable con respecto a la parte fija (28.1), y unos medios de transmisión de movimiento (29), tales como correas o cadenas. Así, más de uno de los cuerpos cilindricos (4'), por ejemplo dos, pueden ser accionados para su giro por el mismo medio convencional de accionamiento giratorio. The heating device comprises a spindle (26) for each of the axes (6 '), a bar (27), tension adjustment means (28) comprising a fixed part (28.1) and a moving part (28.2 ) movable with respect to the fixed part (28.1), and movement transmission means (29), such as belts or chains. Thus, more than one of the cylindrical bodies (4 '), for example two, can be driven for rotation by the same conventional means of rotary actuation.
Los medios de apriete (18) también son comprendidos en el dispositivo de calentamiento para establecer la fijación y la liberación, de manera rápida y sencilla, entre cada uno de los ejes (6') y el husillo (26) correspondiente, además de entre la barra (27) y un eje de salida (30) propio del motor o el medio convencional de accionamiento giratorio comprendido en el dispositivo de calentamiento. De acuerdo con esto, mediante el eje de salida (30) se transmite un giro a la barra (27). El giro recibido por la barra (27) es transmitido a cada uno de los husillos (26) mediante los medios de transmisión de movimiento (29). El giro recibido por la barra (27) es transmitido a cada uno de los husillos (26) mediante los medios de transmisión de movimiento (29). Para una correcta transmisión del giro de la barra (27) a cada uno de los husillos (26), la parte móvil (28.2) está dispuesta con respecto a la parte fija (28.1) de forma que los medios de transmisión de movimiento (29) se encuentran en un estado de tensión por un esfuerzo de tracción o estirado. Asimismo, el giro recibido por cada uno de los husillos (26) es transmitido al eje (6') correspondiente, el cual a su vez transmite el giro al cuerpo cilindrico (4') al que se encuentra fijado. The clamping means (18) are also included in the heating device to establish the fixing and release, quickly and easily, between each of the axes (6 ') and the corresponding spindle (26), in addition to the rod (27) and an output shaft (30) of the motor itself or the conventional means of rotary drive included in the heating device. Accordingly, by means of the output shaft (30) a turn is transmitted to the bar (27). The rotation received by the bar (27) is transmitted to each of the spindles (26) by means of motion transmission means (29). The rotation received by the bar (27) is transmitted to each of the spindles (26) by means of motion transmission means (29). For a correct transmission of the rotation of the bar (27) to each of the spindles (26), the movable part (28.2) is arranged with respect to the fixed part (28.1) so that the movement transmission means (29 ) are in a state of tension due to tensile stress. Likewise, the rotation received by each of the spindles (26) is transmitted to the corresponding axis (6 '), which in turn transmits the rotation to the cylindrical body (4') to which it is fixed.
Al igual que los ejes (6'), el eje de salida (30) atraviesa una de las dos tapas extremas (10'), concretamente la tapa extrema inferior (10'). Los ejes (6') atraviesan la tapa extrema inferior (10') para contactar con los husillos (26) y el eje de salida (30) atraviesa dicha tapa (10') para contactar con la barra (27). Adicionalmente se puede disponer en cada uno de los ejes (6') uno de los disco (5) con sus respectivos imanes (3) en la cara orientada hacia el cuerpo cilindrico (4') para aumentar el calentamiento en el extremo correspondiente de dicho cuerpo cilindrico (4'). Like the axes (6 '), the output shaft (30) crosses one of the two end caps (10'), specifically the lower end cap (10 '). The axes (6 ') pass through the lower end cover (10') to contact the spindles (26) and the output shaft (30) passes through said cover (10 ') to contact the bar (27). Additionally, one of the discs (5) with their respective magnets (3) can be arranged in each of the axes (6 ') on the face facing the cylindrical body (4') to increase the heating at the corresponding end of said cylindrical body (4 ').
Los serpentines (1 ') son dispuestos conectados entre sí para el paso del fluido a ser calentado por cada uno de los serpentines (1'). Para esto cada una de las tapas extremas (10', 1 1 ') tiene un orificio de entrada (31) para la entrada del fluido a uno de los serpentines (1 ') y un orificio de salida (32) para la salida del fluido de uno de los serpentines (1 '). The coils (1 ') are arranged connected to each other for the passage of the fluid to be heated by each of the coils (1'). For this, each of the end caps (10 ', 1 1') has an inlet hole (31) for fluid inlet to one of the coils (1 ') and an outlet hole (32) for the outlet of the fluid of one of the coils (1 ').
En el ejemplo apreciable en la figura 19, en la tapa extrema inferior (10') a través de la cual pasan los dos ejes (6') se disponen el orificio de entrada (31) en correspondencia con uno de los cuerpo cilindricos (4'), próximo a su husillo (26), y el orificio de salida (32) en correspondencia con el otro de los cuerpos cilindricos (4'), próximo a su husillo (26). Asimismo, la otra de las tapas extremas (1 1 '), la tapa extrema superior (1 1'), igualmente tiene el orificio de entrada (31) y el orificio de salida (32) para comunicación de ambos serpentines (1 '). In the example that can be seen in figure 19, in the lower end cover (10 ') through which the two axes (6') pass, the inlet hole (31) is arranged in correspondence with one of the cylindrical bodies (4 '), close to its spindle (26), and the exit hole (32) in correspondence with the other of the cylindrical bodies (4'), close to its spindle (26). Also, the other of the end caps (1 1 '), the upper end cover (1 1'), also has the inlet hole (31) and the outlet hole (32) for communication of both coils (1 ') .

Claims

REIVINDICACIONES
1. - Dispositivo de calentamiento por inducción magnética, que comprende un cuerpo cilindrico (4, 4') accionable en giro y provisto con imanes (2) longitudinalmente dispuestos en la periferia del cuerpo cilindrico (4, 4') según una distribución con polaridades alternas de los sucesivos imanes (2) en la distribución, yendo alrededor de dicho cuerpo cilindrico (4, 4') un serpentín (1 , 1 ') de circulación de un fluido a calentar, caracterizado por que el serpentín (1 , 1 ') se aloja dentro de una carcasa (9, 9') de un material conductor eléctrico y conductor térmico, en la cual por influencia magnética de los imanes (2) en movimiento se genera un calor que se transmite al serpentín (1 , 1 '). 1. - Magnetic induction heating device, comprising a cylindrical body (4, 4 ') rotatable and provided with magnets (2) longitudinally arranged on the periphery of the cylindrical body (4, 4') according to a distribution with polarities alternate of the successive magnets (2) in the distribution, going around said cylindrical body (4, 4 ') a coil (1, 1') of circulation of a fluid to be heated, characterized in that the coil (1, 1 ' ) it is housed inside a housing (9, 9 ') of an electrically conductive and thermal conductive material, in which a heat is generated by magnetic influence of the moving magnets (2) that is transmitted to the coil (1, 1' ).
2. - Dispositivo de calentamiento por inducción magnética, según la reivindicación 1 , caracterizado por que el cuerpo cilindrico (4) va incorporado axialmente en un eje (6) accionable en giro, en el cual eje (6) se incorpora axialmente un disco (5) provisto con imanes (3) en una distribución con polaridades alternas, los cuales imanes (3) generan calor por influencia magnética en la carcasa (9). 2. - Magnetic induction heating device according to claim 1, characterized in that the cylindrical body (4) is axially incorporated in a shaft (6) rotatable, in which axis (6) a disk is axially incorporated ( 5) provided with magnets (3) in a distribution with alternating polarities, which magnets (3) generate heat by magnetic influence on the housing (9).
3. - Dispositivo de calentamiento por inducción magnética, según una cualquiera de las reivindicaciones anteriores, caracterizado por que la carcasa (9) comprende dos paredes (9.1 y 9.2) cilindricas concéntricas, y dos tapas extremas (10 y 11) que cierran las paredes (9.1 y 9.2), yendo el serpentín (1) incluido entre las dos paredes (9.1 y 9.2) en sujeción mediante unos soportes radiales (12) que va unidos a las paredes (9.1 y 9.2). 3. - Magnetic induction heating device according to any one of the preceding claims, characterized in that the housing (9) comprises two concentric cylindrical walls (9.1 and 9.2), and two end caps (10 and 11) that close the walls (9.1 and 9.2), the coil (1) included between the two walls (9.1 and 9.2) being held in place by means of radial supports (12) that are attached to the walls (9.1 and 9.2).
4. - Dispositivo de calentamiento por inducción magnética, según una cualquiera de las reivindicaciones anteriores, caracterizado por que los imanes (2) se disponen encajados en unas ranuras (7) longitudinales que el cuerpo cilindrico (4) tiene en su periferia. 4. - Magnetic induction heating device according to any one of the preceding claims, characterized in that the magnets (2) are arranged embedded in longitudinal grooves (7) that the cylindrical body (4) has on its periphery.
5. - Dispositivo de calentamiento por inducción magnética, según una cualquiera de las reivindicaciones 2 a 4, caracterizado por que los imanes (3) están encajados en unas ranuras (8) radiales que tiene el disco (5) en su cara orientada hacia el cuerpo cilindrico (4). 5. - Magnetic induction heating device according to any one of claims 2 to 4, characterized in that the magnets (3) are embedded in radial grooves (8) that the disc (5) has on its face facing the cylindrical body (4).
6. - Dispositivo de calentamiento por inducción magnética, según una cualquiera de las reivindicaciones 3 a 5, caracterizado por que los soportes radiales (12) están formados por dios mitades complementarias, las cuales se disponen encajadas, respectivamente, en unas ranuras (13) que las paredes (9.1 y 9.2) tienen longitudinalmente en sus respectivas caras enfrentadas de la una hacia la otra, poseyendo dichas mitades complementarias de los soportes radiales (12) en sus bordes enfrentados entre ellas unas escotaduras (14) mediante las que se acoplan sobre las espiras del serpentín (1). 6. - Magnetic induction heating device according to any one of claims 3 to 5, characterized in that the radial supports (12) are formed by complementary god halves, which are arranged, respectively, embedded in slots (13) that the walls (9.1 and 9.2) have longitudinally on their respective faces facing each other, said complementary halves of the radial supports (12) at their edges facing each other recesses (14) by which they are coupled on the coils of the coil (1).
7.- Dispositivo de calentamiento por inducción magnética según la reivindicación 1 , caracterizado por que el cuerpo cilindrico (4') comprende unos medios de acople (16) para acople de unos medios de fijación (17), de forma que estando los medios de fijación (17) acoplados en los medios de acople (16) y los imanes (2) alojados en unas ranuras (7') longitudinales que tiene el cuerpo cilindrico (4'), partes extremas de las ranuras (7') longitudinales quedan externamente cubiertas quedando retenidos los imanes (2) en las ranuras (7') longitudinales. 7. Magnetic induction heating device according to claim 1, characterized in that the cylindrical body (4 ') comprises coupling means (16) for coupling fixing means (17), so that the means of fixing (17) coupled in the coupling means (16) and the magnets (2) housed in longitudinal grooves (7 ') which has the cylindrical body (4'), end portions of the longitudinal grooves (7 ') are externally covered with the magnets (2) being retained in the longitudinal grooves (7 ').
8. - Dispositivo de calentamiento por inducción magnética según la reivindicación 7, caracterizado por que los medios de acople (16) son roscas externas y los medios de fijación (17) son casquillos cilindricos con una rosca interna, de forma que es establecible un acople por enroscado de los medios de fijación (17) en los medios de acople (16). 8. - Magnetic induction heating device according to claim 7, characterized in that the coupling means (16) are external threads and the fixing means (17) are cylindrical bushes with an internal thread, so that a coupling is stable by screwing the fixing means (17) into the coupling means (16).
9. - Dispositivo de calentamiento por inducción magnética según la reivindicación 7 u 8, caracterizado por que comprende un eje (6') accionable en giro y unos medios de apriete (18), de forma que mediante los medios de apriete (18) es establecible una fijación por apriete entre el cuerpo cilindrico (4') y el eje (6'). 9. - Magnetic induction heating device according to claim 7 or 8, characterized in that it comprises a shaft (6 ') which can be rotatable and means of clamping (18), such that by means of the clamping means (18) it is a tightening fixation between the cylindrical body (4 ') and the shaft (6') can be established.
10. - Dispositivo de calentamiento por inducción magnética según una cualquiera de las reivindicaciones 7 a 9, caracterizado por que el serpentín (1 ') está definido por un surco en una superficie externa de una de las paredes (9.1') junto con una superficie interna de la otra de las paredes (9.2'). 10. - Magnetic induction heating device according to any one of claims 7 to 9, characterized in that the coil (1 ') is defined by a groove in an external surface of one of the walls (9.1') together with a surface internal of the other of the walls (9.2 ').
1 1. - Dispositivo de calentamiento por inducción magnética según una cualquiera de las reivindicaciones 7 a 10, caracterizado por que comprende al menos una zona estriada (23) en correspondencia con una superficie interna de una de las paredes (9.1 ') para envolver radial y externamente las ranuras (7') longitudinales del cuerpo cilindrico (4'). 1 1. - Magnetic induction heating device according to any one of claims 7 to 10, characterized in that it comprises at least one striated area (23) in correspondence with an internal surface of one of the walls (9.1 ') for radial wrapping and externally the longitudinal grooves (7 ') of the cylindrical body (4').
12. - Dispositivo de calentamiento por inducción magnética según una cualquiera de las reivindicaciones 7 a 1 1 , caracterizado por que comprende dos de los cuerpos cilindricos (4'), estando los cuerpos cilindricos (4') separados entre sí de acuerdo a una distancia que permite una interacción entre campos magnéticos generados por los imanes (2) de cada uno de los cuerpos cilindricos (4') entre sí, de forma que el giro de uno de los cuerpos cilindricos (4') contribuye en el giro del otro de los cuerpos cilindricos (4'). 12. - Magnetic induction heating device according to any one of claims 7 to 1, characterized in that it comprises two of the cylindrical bodies (4 '), the cylindrical bodies (4') being separated from each other according to a distance that it allows an interaction between magnetic fields generated by the magnets (2) of each of the cylindrical bodies (4 ') with each other, so that the rotation of one of the cylindrical bodies (4') contributes to the rotation of the other of the cylindrical bodies (4 ').
PCT/ES2016/070862 2015-12-14 2016-12-05 Device for heating by magnetic induction WO2017103305A1 (en)

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WO1997046051A1 (en) * 1996-05-29 1997-12-04 Railfix N.V. Boiler with permanent magnets
DE19933114A1 (en) * 1999-07-19 2001-01-25 Ulrich Wigger Magnetic motor for generating energy, has rotors with equal numbers of rotatable permanent magnets with magnetic fields acting on opposing magnets of adjacent rotors
WO2002087285A1 (en) * 2001-04-19 2002-10-31 Paolo Arnaldo Rosastro Device for converting magnetic energy into thermal energy, particularly for heating material in a solid or fluid state
US20130062340A1 (en) * 2011-09-14 2013-03-14 Wan Chun Hsu Centrifugal Magnetic Heating Device

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