JP2012160369A - Magnet rotation type heat generating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnet rotation type heat generating apparatus which generates high temperature heat and prevents the deterioration of magnetic force due to the temperature increase of permanent magnets.SOLUTION: A heat shield plate 26 is arranged between a rotor 5, supported so as to rotate relative to a base 2 and having multiple permanent magnets 4 arranged on an upper surface thereof in a concentric circular manner, and a heat generation plate 6 located near the upper side of the rotor 5 and supported to be fixed relative to the base 2. The heat shield plate 26 blocks heat radiated from the heat generation plate 6 to the permanent magnets 4 side and prevents airflow generated by rotations of the rotor 5 from being blown onto the heat generation plate 6, thereby preventing heat from being taken from the heat generation plate 6 by the airflow.

Description

  The present invention relates to a device that converts energy of rotational motion into thermal energy, and more particularly to a magnet rotation type heat generating device having a structure that generates heat by generating an eddy current in a conductor by the rotational motion of a permanent magnet.

  Conventionally, as described in Patent Document 1 and Patent Document 2, for example, a conductor and a permanent magnet are arranged to face each other, and an eddy current is generated in the conductor by rotating the permanent magnet with respect to the conductor. There has been proposed a heat generating device having a structure that generates heat.

JP-A-11-312574 Japanese Patent No. 3955888

  The apparatus described in Patent Document 1 rotates a permanent magnet by a drive motor, heats a conductor facing the permanent magnet, and circulates in a heat medium fluid jacket provided on the conductor side. It is comprised as a magnet type heater which was made to heat.

  Further, the apparatus described in Patent Document 2 rotates a rotor on which a permanent magnet is attached by wind power, heats a heating unit including a conductive material disposed in the magnetic field, and heats the heating unit. It is constituted as a permanent magnet type eddy current heating device which heats fluid which passes through fluid circuits connected to each other.

  As described above, in a conventional heat generating device having a structure in which an eddy current is generated in a conductor by rotating the permanent magnet, the permanent magnet arranged in the vicinity of the conductor receives heat radiated from the conductor. When exposed to a long time, there was a problem that the permanent magnet became hot and its magnetic force was weakened.

  Further, when the permanent magnet rotates, the surrounding air is dragged to generate an air flow, and when this hits the conductor surface, heat is taken away from the conductor, and it is difficult to heat the conductor to a high temperature.

  Therefore, the present invention eliminates the problems of the conventional heat generating device as described above, can generate a high temperature, and can prevent a decrease in magnetic force due to a temperature increase of the permanent magnet. The purpose is to provide.

  The magnet rotation type heat generating device of the present invention provided for the above purpose includes a base, an input shaft rotatably supported with respect to the base, and a center position fixed to one end of the input shaft. A rotor made of a nonmagnetic material having a plurality of concentric magnet holding holes formed on a surface opposite to the shaft side at equal intervals on a concentric circle with respect to the center position, and embedded in each magnet holding hole A plurality of permanent magnets, each of which is magnetized in the axial direction of the rotor and adjacent to the circumferential direction of the rotor, and whose magnetic poles are magnetized in opposite directions, and a nonmagnetic metal material, A heat generating plate fixedly supported to the base via an electric insulator so as to face and face the surface of the rotor where the magnet holding hole is formed, and the heat generating plate and the rotor. Placed in a fixed position between, non-magnetic , Electrical insulation, heat resistance, and is formed of a material provided with the heat insulating property, in which a heat shielding plate for suppressing the transfer of heat between said heating plate and the rotor.

  In the magnet rotation type heat generating device of the present invention, it is desirable that a variable speed motor for rotationally driving the rotor is incorporated, and the input shaft is also used as the output shaft of the motor. It is also desirable that the input shaft is driven to rotate by a windmill or a water wheel. Furthermore, it is also desirable that the input shaft is rotationally driven by human power through a speed increasing mechanism.

  According to the magnet rotation type heat generating device according to the first aspect of the present invention, since the heat shield plate is disposed between the heat generating plate and the permanent magnet provided on the rotor, it is radiated from the high temperature heat generating plate. Heat is blocked by the heat shield plate, and a decrease in magnetic force due to a temperature increase of the permanent magnet can be prevented.

  In addition, when the rotor rotates at high speed, the air flow generated by the surrounding air is blocked by the heat shield and does not hit the heat generating plate, so that the heat generating plate is prevented from being cooled by hitting the air flow. Can be generated.

  Further, according to the magnet rotation type heat generating device according to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the input shaft is further provided as the output shaft of the variable speed motor built in the device. Therefore, the number of parts can be reduced and the entire apparatus can be made compact, and the amount of heat generated by the heat generating plate can be easily adjusted by changing the rotational speed of the rotor.

According to the magnet rotation type heat generating device according to the invention described in claim 3, in addition to the effect of the invention described in claim 1, fuel and electric power for generating heat are unnecessary, and global warming is achieved. Since it is possible to generate heat without generating CO ₂ which is said to be a cause of conversion, it is possible to contribute to energy saving and reduction of environmental load.

  According to the magnet rotation type heat generating device according to the invention described in claim 4, in addition to the effect of the invention described in claim 3, in the emergency such as a camp site or an earthquake where power and fuel cannot be secured. It can be effectively used as a heat source for cooking and heating.

It is a longitudinal section showing one embodiment of a magnet rotation type exothermic device of the present invention. It is a disassembled perspective view which shows one Embodiment of the magnet rotation type heat generating apparatus of this invention. It is a top view of the base in one Embodiment of the magnet rotation type heat generating apparatus of this invention. It is a top view of the rotor in one Embodiment of the magnet rotation type heat generating apparatus of this invention. It is a fragmentary sectional view which shows the XX cross section of FIG. It is a top view of the support | pillar holding plate in one Embodiment of the magnet rotation type heat generating apparatus of this invention. It is a perspective view which shows the heat generating plate and heat shield in 1 embodiment of the magnet rotation type heat generating apparatus of this invention. It is a fragmentary longitudinal cross-section which shows the attachment structure of the heat shield to the heat generating plate lower surface in one Embodiment of the magnet rotation type heat generating apparatus of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a magnet rotating type heat generating apparatus (hereinafter simply referred to as a heat generating apparatus) of the present invention, and FIG. 2 is an exploded perspective view thereof (some parts are not shown). As shown in these drawings, the heating device 1 of the present invention is rotated by a variable speed motor 3 provided on a base 2 and has a large number of permanent magnets 4 (not shown in FIG. 2) on its upper surface. (Not shown) is provided with an aluminum rotor 5 embedded and fixed.

  In addition, an aluminum heat generating plate 6 is disposed above the rotor 5, and when the rotor 5 is rotated by the motor 3, the magnetic flux of the permanent magnet 4 penetrating the heat generating plate 6 rotates together with the rotor 5. Thus, an eddy current is generated in the heat generating plate 6, and at this time, the heat generating plate 6 itself generates heat due to the electric resistance in the heat generating plate 6, and the heated object V placed on the upper surface is heated.

  As shown in FIG. 3, the base 2 has a square shape in plan view, and adjustment screws 7 </ b> A of rubber vibration-proof pads 7 are screwed into screw holes 2 </ b> A formed near the four corners of the base 2. And supported on a support surface A such as a floor or a stand through these vibration-proof pads 7.

  These anti-vibration pads 7 can be adjusted by rotating the screwing position of the adjusting screw 7A with respect to the corresponding screw hole 2A so that the base 2 is horizontal on the support surface A, and can be fixed by the lock nut 8. It is like that. Further, four motor post mounting holes 2B are formed around the central portion of the base 2 on the diagonal line. In addition, the base 2 in this embodiment is manufactured with the thick board made from aluminum for weight reduction.

  Fixing bolts 9 are respectively inserted into the motor column mounting holes 2B from the lower surface side of the base 2 and formed on the lower end surfaces of four aluminum motor columns 10 standing on the upper surface of the base 2. These motor struts 10 are fixed vertically to the upper surface of the base 2 by being screwed into the screw holes 10A (see FIG. 1).

  As shown in FIG. 2, screw holes 10 </ b> B similar to the screw holes 10 </ b> A on the lower end surface are formed on the upper end surfaces of these motor columns 10, and bolts provided at four locations on the mounting flange 3 </ b> A of the motor 3. The motor 3 is fixed on the base 2 in an upward state by passing through the fixing bolts 11 through the holes 3B and screwing into the screw holes 10B.

  The output shaft 3C of the motor 3 protruding upward from the mounting flange 3A is fitted with an annular spacer 12 having an axial slit (not shown) formed on a part of its peripheral surface so as to be elastically deformable. Further, a fixing ring 13 is attached so as to surround the outer periphery thereof.

  The fixing ring 13 is formed with an axial slit 13A in a part of its peripheral surface so that it can be elastically deformed, and an attachment hole 13B penetrating in the axial direction is formed on the circumference 3 concentric with the output shaft 3B. It is formed in the place.

  Although not shown, a fastening screw is attached to the fixing ring 13 so as to cross the slit 13A. By tightening the fastening screw, the clearance of the slit 13A is narrowed, and the fixing ring 13 is The outer peripheral surface of the output shaft 3 </ b> C is tightened via the spacer 12, and is fixed to this by friction.

  On the other hand, a shaft hole 5A into which the upper end of the output shaft 3C of the motor 3 is fitted is formed in the central portion of the rotor 5, and in the periphery thereof, positions where the centers of the three mounting holes 13B overlap each other. A screw hole 5B is formed through.

  A fixing bolt 14 is inserted into the mounting hole 13B of the fixing ring 13 from below and is screwed into the screw hole 5B of the rotor 5. The output shaft 3C of the motor 3 and the rotor 5 are connected via the fixing ring 13. They are connected and fixed together.

  4 is a plan view of the rotor 5, and FIG. 5 is a partial cross-sectional view showing the XX cross section in FIG. 4. As shown in FIG. Each of the cylindrical magnet housing holes 5C is formed on two inner and outer concentric circles with respect to the center of the shaft hole 5A.

  A cylindrical magnet 4 having a size matching the inner diameter and depth of the magnet housing hole 5C and magnetized in the axial direction is fitted in each magnet receiving hole 5C. As shown in FIG. 5, these permanent magnets 4 are formed with through holes 4A penetrating in the axial direction, and are formed at the center of the bottom of the magnet housing hole 5C through a countersunk screw 15 through the through hole 4A. Each permanent magnet 4 is embedded and fixed in the magnet housing hole by being screwed into the screw hole 5D.

  Further, the permanent magnets 4 adjacent to each other in the circumferential direction of the rotor 5 are arranged so that the directions of the N magnetic pole and the S magnetic pole are alternately opposite. As shown in FIG. The twelve permanent magnets 4 arranged above and the twelve permanent magnets 4 arranged on the inner circumference are arranged with a phase difference of 15 degrees at the central angle. In the present embodiment, these permanent magnets 4 are neodymium magnets having the strongest magnetic force among the currently available permanent magnets.

  As shown in FIG. 1, an aluminum column holding plate 16 is provided so as to overlap the upper surface of the base 2. As shown in FIG. 6, the support column holding plate 16 is formed in a square shape in plan view, and a large-diameter hole 16 </ b> A is opened in the center of the four motor support columns 10. ing.

  Further, column through holes 16B are formed in the vicinity of the four corners of the column holding plate 16, respectively, and two each between the two column through holes 16B adjacent in the direction along each side. Bolt holes 16C are formed side by side. Further, four small-diameter screw holes 16D are formed so as to penetrate each of the column through holes 16B.

  On the other hand, as shown in FIG. 3, on the base 2 side, strut through-holes 2C are formed at positions overlapping with the four strut through-holes 16B of the strut holding plate 16 in plan view, and each bolt hole 16C. Screw holes 2D are respectively formed at positions facing directly below.

  The column holding plate 16 is inserted into the bolt holes 16C from above by fixing bolts 17 (only one is shown in FIG. 2) and screwed into the respective screw holes 2D on the opposite base 2 side to thereby fix the base 2 It is fixed to.

  As shown in FIG. 1, a portion near the lower end of the column 18 is fitted in each of the column through hole 2 </ b> C and the column through hole 16 </ b> B that are arranged so as to overlap vertically at positions near the four corners of the base 2 and the column holding plate 16. Are combined.

  In the present embodiment, these struts 18 are made of a round bar made of aluminum, and are fixed on the top surface of the strut holding plate 16 so as to be coaxial with the four strut through holes 16B. It is fixed to the support column holding plate 16 via a tool 19.

  These fixing tools 19 have a through-hole 19A through which the support column 18 penetrates in the center. A fixing bolt 20 is passed through the bolt hole 19B of the flange formed at the lower end of the fixing device 19 from above. It is fixed to the column holding plate 16 by being screwed into a screw hole 16D formed around the column through hole 16B.

  Further, the upper half portion of these fixtures 19 can be elastically deformed by the slit structure similarly to the fixing ring 13 described above, and the upper portion of the through hole 19A is tightened by fastening the fastening screw 21 (see FIG. 2). The inner peripheral surface of the half is reduced in diameter, and the outer peripheral surface of the support column 18 is fixed.

  The vicinity of the upper end of each column 18 is fitted into a through hole 6 </ b> A formed in the vicinity of the four corners of the heat generating plate 6. The inner diameters of these through-holes 6A are formed larger than the outer diameters of the columns 18, and a flanged heat insulating collar 22 is inserted into the annular gap generated by the difference in diameter from the lower surface side of the heat generating plate 6. Further, a heat insulating washer 23 is disposed on the upper surface side, and fixing plates 24 and 25 are brought into contact with the lower surface of the heat insulating collar 22 and the upper surface of the heat insulating washer, respectively, and the heat generating plate 6 is fixed to the column 18.

  The heat insulating collar 22 and the heat insulating washer are made of ceramic in the present embodiment, and thermally and electrically insulate between the heat generating plate 6 and the column 18. The fixing rings 24 and 25 have a structure in which a fastening screw that crosses the slit is fastened and fixed to the outer peripheral surface of the column 18 like the fixing ring 13 and the fixture 19 described above. .

  As shown in FIG. 7, a substantially square glass wool heat shield plate 26 is attached to the lower surface of the heat generating plate 6 with fixing screws 27 in the vicinity of the four corners thereof. The four corner portions of the heat shield plate 26 are processed into a concave arc shape with a corner dropped in order to avoid interference with the heat insulating collar 22 and the fixing ring 24 described above. Note that the material of the heat shield plate 26 is not limited to glass wool, but may be any material that is non-magnetic, electrically insulating, heat resistant, and heat insulating.

  Further, as shown in FIG. 8, each fixing screw 27 is a screw formed on the lower surface of the heat generating plate 6 through a spacer 29 through a mounting hole 26 </ b> A through a washer 28 from below. It is screwed into the hole 6B, and a gap 29 is generated between the heat generating plate 6 and the heat shield plate 26 by the spacer 29, so that heat is hardly transmitted between the heat generating plate 6 and the heat shield plate 26.

  Next, the operation of the heat generating device 1 configured as described above will be described. When the heat generating device 1 is used, as shown in FIG. 1, the anti-vibration pads 7 attached to the bottom four corners of the base 2 are in close contact with the support surface A, and the base 2 is horizontal. After adjusting the screwing position of the male screw 7A of each anti-vibration pad 7 with respect to the screw hole 2A of the base 2, the lock nut 8 is tightened and fixed so that the adjustment position does not shift.

  Next, for example, a heated object V such as a pan is placed on the heat generating plate 6 and the motor 3 is energized to start it. When the output shaft 3C of the motor 3 rotates, the rotor 5 fixed to the output shaft 3C also rotates together.

  On the other hand, the magnetic flux spreads in an arch shape above the rotor 6 from between the permanent magnets 4 arranged in the circumferential direction with the magnetic poles NS alternately oriented on the upper surface of the rotor 6. This magnetic flux passes through the non-magnetic glass wool heat shield 26 disposed on the upper surface of the rotor 6 and enters the aluminum heat generating plate 6 thereabove.

  As the rotor 5 rotates, the magnetic flux emitted from the permanent magnet 4 moves in the rotational direction in the heat generating plate 6, and as a result, an eddy current is generated inside the heat generating plate 6 that is a conductor. At that time, Joule heat is generated by the electrical resistance of the heat generating plate 6 itself, the heat generating plate 6 becomes high temperature, and the heated object V placed on the upper surface of the heat generating plate 6 is heated.

  In the heat generating apparatus 1 of the present embodiment, since a variable speed motor is used as the motor 3, the amount of heat generated by the heat generating plate 6 can be easily and stably adjusted by changing the rotational speed of the rotor 5.

  A temperature sensor such as a thermistor is attached to the heat generating plate 6 to detect the temperature, and based on the temperature information, the number of rotations of the output shaft 3C of the motor 3 is controlled to set the temperature of the heat generating plate 6 to a desired value. A structure that can be automatically adjusted is also possible.

  Here, the permanent magnet 4 attached to the rotor 5 is vulnerable to heat, and there is a problem that the magnetism is weakened when exposed to a high temperature. However, between the heat generating plate 6 and the permanent magnet 4 is a glass wool shield. Since they are isolated by the hot plate 26, these permanent magnets 4 can avoid the influence of heat radiated from the high-temperature heating plate 6.

  On the other hand, the rotor 5 rotates at a high speed to entrain the surrounding air and generate an air flow. The air flow thus generated is blocked by the heat insulating plate 26 and does not hit the heat generating plate 6. There is no risk of being cooled by the air flow, and the heat generating plate 6 can be maintained at a high temperature.

  In the heating device 1 of the above-described embodiment, the rotor 5 is directly attached to the output shaft 3C of the motor 3. However, the rotor is fixed to an input shaft that is rotatably supported with respect to the base. The heat generating device 1 according to the above-described embodiment may be connected to the output shaft of the motor via a shaft coupling or the like, and the input shaft is also used as the output shaft 3 </ b> C of the motor 3.

  Further, in the heating device 1 of the above-described embodiment, as shown in FIG. 4, twelve permanent magnets 4 are arranged on the outer circumference of the upper surface of the rotor 5, and twelve permanent magnets are arranged on the inner circumference. The magnet 4 is arranged, and the permanent magnet 4 on the outer circumference and the permanent magnet 4 on the inner circumference are different in phase by 15 degrees at the central angle. The arrangement is not limited to this embodiment, and for example, it may be arranged on a single circumference or three or more concentric circumferences.

  Moreover, in the heat generating apparatus 1 of the above-described embodiment, the base 2 is formed in a square plate shape, and the heat generating plate 6 and the motor 3 are attached to the base 2 via the support column 18 and the motor support column 10. It is not necessary to limit to the thing of this embodiment, For example, you may attach a heat-generation board and a motor directly to the base formed in frame shape.

  Moreover, in the heat generating apparatus 1 of this embodiment, although aluminum material is frequently used for the base 2 and the support | pillar 18 etc. in order to reduce the weight of the whole apparatus, it is not limited to this, The strength and heat resistance of equivalent or more You may manufacture using the material which has property.

  Moreover, in the heat generating apparatus 1 of the above-described embodiment, the case where the object to be heated V such as a pan is placed on the upper surface of the heat generating plate 1 and heated is described. However, the heat generating apparatus of the present invention is It is not limited to the use for heating the heating element. For example, a heat radiating fin is provided on the heat generating plate to dissipate heat directly into the room, or the heat generating plate is provided with a fluid passage serving as a heat medium. By exchanging heat with a fluid and indirectly dissipating heat into the room through this fluid, it can also be used for heating applications.

  Further, the input shaft can be driven and connected to a rotational drive source outside the heat generating device for rotation. As an external rotational drive source, various things such as an internal combustion engine such as a gasoline engine, a windmill, and a water wheel can be used.

In particular, when using a windmill or water turbine that is rotated by natural energy such as wind power or hydraulic power as a rotational drive source for driving the input shaft, no fuel or electric power is required to generate heat, And since it becomes possible to generate heat without generating CO ₂ which is said to cause global warming, it is possible to contribute to energy saving and reduction of environmental load.

  In addition, the heat generating device may have a structure in which the input shaft is manually rotated by a manual handle or a foot pedal through a speed increasing mechanism using a known gear or the like. In this case, a power source and fuel are secured. It can be effectively used as a heat source for cooking, heating, etc. in emergency situations such as campsites and earthquakes that cannot be done.

DESCRIPTION OF SYMBOLS 1 Heat generating apparatus 2 Base 2A Screw hole 2B Motor support | pillar mounting hole 2C Support | pillar through-hole 2D Screw hole 3 Motor 3A Mounting flange 3B Bolt hole 3C Output shaft (also input shaft)
4 Permanent Magnet 4A Through Hole 5 Rotor 5A Shaft Hole 5B Screw Hole 5C Magnet Housing Hole 5D Screw Hole 6 Heating Plate 6A Through Hole 6B Screw Hole 7 Anti-Vibration Pad 7A Adjustment Screw 8 Lock Nut 9 Fixing Bolt 10 Motor Post 10A Screw Hole 10B Screw hole 11 Fixing bolt 12 Spacer 13 Fixing ring 13A Slot 13B Mounting hole 14 Fixing bolt 15 Flat head screw 16 Supporting plate 16A Hole 16B Posting through hole 16C Bolt hole 16D Screwing hole 17 Fixing bolt 18 Post 19 Fixing tool 19A Through hole 19B Bolt hole 20 Fixing bolt 21 Fastening screw 22 Insulating collar 23 Insulating washer 24, 25 Fixing ring 26 Heat shield plate 27 Fixing screw 28 Washer 29 Spacer

Claims (4)

Base and
An input shaft rotatably supported with respect to the base;
A non-magnetic structure in which a center position is fixed to one end of the input shaft, and a plurality of magnet holding holes having the same shape are formed on a surface opposite to the input shaft side at equal intervals on a concentric circle with respect to the center position. A rotor made of material,
A plurality of permanent magnets embedded and fixed in the respective magnet holding holes, each of which is magnetized in the axial direction of the rotor and adjacent to the circumferential direction of the rotor, and whose magnetic poles are magnetized in opposite directions to each other;
A heating plate formed of a non-magnetic metal material and fixedly supported with respect to the base via an electrical insulator so as to face and face the surface of the rotor where the magnet holding hole is formed;
Heat transfer between the heat generating plate and the rotor, which is disposed at a fixed position between the heat generating plate and the rotor and is formed of a material having non-magnetic properties, electrical insulation properties, heat resistance properties, and heat insulation properties. A magnet rotation type heat generating device characterized by comprising a heat shield plate that suppresses heat.   2. The magnet rotation type heat generating device according to claim 1, wherein a variable speed motor for rotating the rotor is incorporated, and an output shaft of the motor is also used as an input shaft.   2. The magnet rotation type heat generating device according to claim 1, wherein the input shaft is rotationally driven by a wind turbine or a water turbine.   2. The magnet rotation type heat generating device according to claim 1, wherein the input shaft is rotationally driven by human power through a speed increasing mechanism.

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