JP6516562B2 - Fluid heating device - Google Patents

Description

  The present invention relates to a fluid heating apparatus that heats a fluid to be heated, such as water, using electromagnetic induction.

  As a conventional fluid heating device, for example, as shown in Patent Document 1, there is a device in which a primary coil is wound around a closed magnetic circuit core and a heating conductor tube in which a fluid to be heated flows is wound. The fluid heating device is configured to heat the fluid to be heated by applying an alternating voltage to the primary coil and causing the heating conductor tube to generate heat by electromagnetic induction.

  However, the heating conductor tube that generates heat due to electromagnetic induction gives heat to the fluid to be heated flowing inside, and at the same time releases heat to the outside, resulting in heat loss. Since the heat dissipation heats surrounding components, a separate heat countermeasure is required. For example, although heat insulation can be performed by providing a heat insulating material, in order to perform sufficient heat insulation (to ensure thermal safety), the amount of heat insulating material used increases.

  In addition, when the liquid is heated and changes its state to gas, its volume is greatly increased (about 1700 times in the case of water), as a countermeasure, dedicated pressure accumulation that can cope with high temperature in the flow path of the fluid to be heated You will need a bowl. The provision of the dedicated pressure accumulator not only complicates the apparatus configuration but also makes it difficult to miniaturize the apparatus.

JP 2012-163229 A

  Therefore, the present invention has been made to solve the above-mentioned problems, and it is possible to provide a pressure accumulation function without providing a dedicated pressure accumulator while improving thermal safety and improving heat exchange efficiency. As its main task.

  That is, the fluid heating device according to the present invention comprises a first heating mechanism for heating the fluid to be heated, and a second heating mechanism for further heating the fluid to be heated heated by the first heating mechanism, and the first heating A mechanism and the second heating mechanism are provided on a cylindrical iron core, an outer circumferential surface of the cylindrical iron core, and a magnetic path forming portion forming a closed magnetic path together with the cylindrical iron core, the cylindrical iron core and the magnetic path A heating flow path forming portion provided between the forming portions and heating the fluid to be heated which generates heat by electromagnetic induction and flows inside, and is provided between the cylindrical iron core and the magnetic path forming portion, and the cylindrical iron core An induction coil for generating a magnetic flux inside, a cooling pipe provided between the cylindrical iron core and the magnetic path forming portion, and a cooling medium through which a cooling medium flows, and the heating flow path forming portion of the second heating mechanism The flow passage cross-sectional area is the heating flow of the first heating mechanism. The flow passage volume of the heating flow passage forming portion of the second heating mechanism is larger than the flow passage cross sectional area of the forming portion, and the flow passage volume of the heating flow passage forming portion of the first heating mechanism is larger. Do.

  In the present invention, since the heating flow path forming portion which is a heat source is disposed between the cylindrical iron core and the magnetic path forming portion, the heat leaking from the heating flow path forming portion to the outside can be It can be locked inside. And, in this configuration, since the cooling core through which the cooling medium flows is provided between the cylindrical iron core and the magnetic path forming portion, the thermal safety of the fluid heating device is improved while reducing the amount of the heat insulating material used. be able to.

Further, in the present invention, since the first heating mechanism and the second heating mechanism are provided, the fluid to be heated can be easily heated to a desired temperature. At this time, since the flow passage cross-sectional area of the heating flow passage forming portion of the second heating mechanism is larger than the flow passage cross-sectional area of the heating flow passage forming portion of the first heating mechanism, the heating flow passage forming portion of the second heating mechanism The flow velocity of the fluid to be heated flowing through the first heating mechanism can be made smaller than the flow velocity of the fluid to be heated flowing through the heating flow passage forming portion of the first heating mechanism, and the heat exchange efficiency in the second heating mechanism can be improved. Can be easily heated to the temperature of
Here, the flow passage cross-sectional area of the heating flow passage forming portion is a flow passage cross-sectional area in a cross section orthogonal to the flow passage direction, and in the case where the heating flow passage forming portion has a plurality of branched inner flow passages, It is the total of the flow-path cross-sectional area of the said several internal flow path.

  Furthermore, in the present invention, the flow passage cross sectional area and the flow passage volume of the heating flow passage forming portion of the second heating mechanism are larger than the flow passage cross sectional area and the flow passage volume of the heating flow passage forming portion of the first heating mechanism. In particular, the heating flow passage of the second heating mechanism exhibits the pressure accumulation function, and there is no need to provide a dedicated pressure accumulator, and it is possible to reduce the pulsating flow of the heated fluid to be heated.

The heating flow passage forming portion of the first heating mechanism is formed by winding a conductor pipe in a spiral shape, and the heating flow passage forming portion of the second heating mechanism is formed on the side wall of the cylindrical conductor. It is desirable that a plurality of internal flow paths be formed along the direction.
With this configuration, since the heating flow passage forming portion of the first heating mechanism is formed of a spiral conduit, the heat transfer area for the fluid to be heated can be increased. Further, since the heating flow passage forming portion of the second heating mechanism is formed of a cylindrical conductor in which a plurality of internal flow passages are formed, the heat transfer area for the fluid to be heated is increased, and the flow passage cross sectional area and flow The passage volume can be made larger than the passage cross sectional area and passage volume of the heating passage forming portion of the first heating mechanism by a simple configuration.
The heating channel forming portion of the second heating mechanism is formed of a spiral conduit in the same manner as the heating channel forming portion of the first heating mechanism, and the pipe diameter of the spiral conduit is made from that of the first heating mechanism. However, it is difficult to increase the flow passage cross-sectional area and the flow passage volume as compared with a cylindrical conductor in which a plurality of internal flow passages are formed.

The cooling pipe includes an outer cooling pipe provided between the heating flow path forming portion and the magnetic path forming portion, and an inner cooling pipe provided between the heating flow path forming portion and the cylindrical iron core. It is desirable to include.
With this configuration, both sides in the radial direction of the heating flow path forming portion can be sandwiched by the outer cooling pipe and the inner cooling pipe, and the function of blocking the heat leaked to both sides in the radial direction from the heating flow path forming portion Thus, the thermal safety of the fluid heating device can be further improved while reducing the amount of heat insulating material used.

It is desirable that the cooling pipe is connected to the heating flow path forming unit, and the fluid to be heated flows to the heating flow path forming unit after flowing through the cooling pipe.
With this configuration, it is possible to preheat the fluid to be heated using the heat leaked to the outside from the heating flow passage forming portion. That is, it is possible to efficiently heat the fluid to be heated by reducing the loss due to the heat radiation from the heating flow passage forming portion.

Preferably, the cooling pipe is electrically connected to the induction coil, and an external AC power supply is connected to the cooling pipe and the induction coil.
With this configuration, it is possible to increase the number of turns of the coil element for generating the magnetic flux inside the cylindrical core.

  Here, if the induction coil is wound around the outer periphery of the outer cooling pipe, the heat leaked from the heating flow path forming portion from the inside of the apparatus while preventing the induction coil from becoming high temperature is provided. It can be absorbed by the fluid to be heated, and thermal safety can be improved.

The magnetic path forming portion connects the cylindrical outer core path forming portion provided on the radially outer side of the cylindrical iron core, and both axial end portions of the cylindrical core and the outer magnetic path forming portion. It is desirable that a radial magnetic path forming portion be provided, and the radial magnetic path forming portion be provided with a cooling flow path through which a cooling medium flows.
With this configuration, since the function of blocking the heat leaked to both sides in the axial direction from the heating flow passage forming portion is exhibited, the thermal safety of the fluid heating device is further improved while reducing the amount of the heat insulating material used. be able to.

  In order to further miniaturize the fluid heating device, one of the radial magnetic path forming portions of the first heating mechanism and the other of the radial magnetic path forming portions of the second heating mechanism are connected. Is desirable.

  In order to simplify the configuration of the fluid heating device, the cooling flow path provided in one of the radial magnetic path forming portions of the first heating mechanism and the radial magnetic path forming portion of the second heating mechanism It is desirable that the cooling flow path provided on the other side be shared.

It is desirable that the fluid to be heated flow to the cooling pipe or the heating flow path forming portion after flowing through the cooling flow path.
With this configuration, it is possible to preheat the fluid to be heated using the heat leaked to both sides in the axial direction from the heating flow passage forming portion. That is, it is possible to efficiently heat the fluid to be heated by reducing the loss due to the heat radiation from the heating flow passage forming portion.

  Preferably, the fluid to be heated is water, and the first heating mechanism and the second heating mechanism generate superheated steam. At this time, the first heating mechanism heats water to generate saturated steam, and the second heating mechanism heats saturated steam to generate superheated steam. The effect can be made more pronounced.

  According to the present invention configured as described above, the thermal safety can be improved, and the heat exchange efficiency can be improved, and the pressure accumulation function can be provided without providing a dedicated pressure accumulator.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows typically the structure of the fluid heating apparatus which concerns on one Embodiment of this invention. The figure which shows typically arrangement | positioning in the radial direction of the fluid heating apparatus of the embodiment. Sectional drawing along the axial direction in the heating flow-path formation part of a 1st heating mechanism, and the figure seen from the axial direction. Sectional drawing along the axial direction in the heating flow-path formation part of a 2nd heating mechanism, and sectional drawing orthogonal to an axial direction. Sectional drawing which shows typically the structure of the fluid heating apparatus of modification embodiment.

  Hereinafter, an embodiment of a fluid heating device according to the present invention will be described with reference to the drawings.

<1. Device configuration>
The fluid heating device 100 according to the present embodiment heats water, which is a fluid to be heated, to generate superheated steam, and as illustrated in FIG. 1, a first heating mechanism 100A that heats the fluid to be heated; The second heating mechanism 100B further heats the fluid to be heated heated by the first heating mechanism 100A. In the present embodiment, the first heating mechanism 100A mainly functions to heat water to generate saturated steam, and the second heating mechanism 100B mainly heats saturated steam to generate superheated steam. Play a function that

  Specifically, as shown in FIGS. 1 and 2, the first heating mechanism 100A and the second heating mechanism 100B are provided on the cylindrical iron core 2 and the outer peripheral surface of the cylindrical iron core 2, and together with the cylindrical iron core 2. A magnetic path forming portion 3 which forms a closed magnetic path, and a heating flow path forming portion 4 which is provided between the cylindrical iron core 2 and the magnetic path forming portion 3 and which generates heat by electromagnetic induction to heat the fluid to be heated flowing therein; An induction coil 5 provided between the cylindrical iron core 2 and the magnetic path forming portion 3 for generating magnetic flux inside the cylindrical iron core 2, and provided between the cylindrical iron core 2 and the magnetic path forming portion 3; And a cooling pipe 6 through which the cooling medium flows.

  In the internal space formed of the cylindrical iron core 2 and the magnetic path forming portion 3, the heat insulating material 102 is filled in portions other than the heating flow path forming portion 4, the induction coil 5, the cooling pipe 6 and the like. In addition, the cylindrical iron core 2 and the magnetic path forming portion 3 are fastening mechanisms such as fastening bolts penetrating in the axial direction in a state in which the heating flow path forming portion 4, the induction coil 5, the cooling pipe 6 and the heat insulating material 102 are accommodated. It is fastened from the axial direction by 101 and integrated.

  The cylindrical core 2 is a so-called involute core, and is formed in a cylindrical shape by radially stacking a plurality of silicon steel plates having curved portions whose cross section in the width direction is curved in an involute curve.

  The magnetic path forming portion 3 connects one end in the axial direction of the cylindrical outer core path forming portion 31 and the cylindrical iron core 2 and the outer magnetic path forming portion 31 provided outside the cylindrical iron core 2 in the radial direction. And a second radial magnetic path forming portion 33 connecting the other axial end portion of the cylindrical iron core 2 and the outer magnetic path forming portion 31. The magnetic path forming portion 3 forms a substantially cylindrical space between itself and the cylindrical iron core 2.

  The outer magnetic path forming portion 31 is a so-called involute core similar to the cylindrical core 2 and radially stacked a plurality of silicon steel plates having curved portions whose cross section in the width direction is curved in an involute curve. It has a cylindrical shape.

  Further, the second radial magnetic path forming portion 33 of the first heating mechanism 100A and the first radial magnetic path forming portion 32 of the second heating mechanism 100B are connected, for example, by bonding or the like. That is, the first heating mechanism 100A and the second heating mechanism 100B are integrally formed continuously along the axial direction.

  The heating channel forming unit 4 differs in the configuration between the first heating mechanism 100A and the second heating mechanism 100B.

  As shown in FIG. 3, the heating flow passage forming portion 4 (hereinafter referred to as "heating flow passage forming portion 4A") of the first heating mechanism 100A has a spiral shape (coil) along the outer periphery of the cylindrical iron core 2. Conductor tubes wound in the shape of a circle), and the mutually adjacent conductor tube elements (portions constituting one round of a spiral in the conductor tube) are short-circuited with each other. In the present embodiment, short circuiting is performed by joining the shorting strips 41A by welding or the like across all the conductor tube elements. The heating flow passage forming part 4A of the first heating mechanism 100A forms one internal flow passage 4sA without branching from the inlet to the outlet of the fluid to be heated. The heating flow passage forming portion 4A is disposed coaxially with the cylindrical iron core 2. In addition, in FIG. 1, although the heating flow-path formation part 4A was a thing of single-layer winding, you may be a thing of two or more-layer winding.

  As shown in FIG. 4, the heating flow passage forming portion 4 (hereinafter referred to as "heating flow passage forming portion 4B") of the second heating mechanism 100B is straight along the axial direction of the side wall of the cylindrical conductor 41B. A plurality of internal flow paths 4sB are formed in a shape of a circle. That is, the heating flow passage forming portion 4B of the second heating mechanism 100B forms a flow passage branched into the plurality of internal flow passages 4sB on the way from the introduction port of the fluid to be heated to the discharge port. Specifically, a plurality of through holes (drilled holes) are formed by drilling along the circumferential direction in the wall thickness central portion of the side wall of the cylindrical conductor 41B, and a plurality of through holes are formed on both end faces of the cylindrical conductor 41B. It is comprised by joining the cyclic | annular closure ring 42B in which the ditch | groove which communicates is formed. The plurality of through holes have an equal cross-sectional shape, and are formed in the cylindrical conductor 41B at equal intervals in the circumferential direction. An inlet for the fluid to be heated is formed in one closing ring 42B, and an outlet for the fluid to be heated is formed in the other closing ring 42B.

  Then, as shown in FIG. 1, the connection pipe 11 connects the outlet of the heating channel forming part 4A of the first heating mechanism 100A and the inlet of the heating channel forming part 4B of the second heating mechanism 100B. . Although the connection pipe 11 is configured to penetrate the side wall of the outer magnetic path forming portion 31, the first radial magnetic flux path forming portion 33 of the first heating mechanism 100A and the first radial magnetic field of the second heating mechanism 100B. The passage forming portion 32 may be penetrated.

  Further, the flow passage cross-sectional area of the heating flow passage forming part 4B of the second heating mechanism 100B is larger than the flow passage cross-sectional area of the heating flow passage forming part 4A of the first heating mechanism 100A. Here, the flow passage cross sectional area is a cross section orthogonal to the flow passage direction of the inner flow passage, and the flow passage cross sectional area of the heating flow passage forming portion 4B of the second heating mechanism 100B is the axial direction of the cylindrical conductor 41B. The total cross-sectional area of the plurality of internal flow paths 4sB in the cross section orthogonal to the Further, the flow passage cross-sectional area of the heating flow passage forming part 4A of the first heating mechanism 100A is a flow passage cross-sectional area of the internal flow passage 4sA in a cross section orthogonal to the tube axis direction of the conductor pipe. With this configuration, the flow velocity of the fluid to be heated flowing through the heating flow passage forming portion 4B of the second heating mechanism 100B is smaller than the flow velocity of the fluid to be heated flowing through the heating flow passage forming portion 4A of the first heating mechanism 100A. In the present embodiment, the flow passage cross-sectional area of the heating flow passage forming portion 4B of the second heating mechanism 100B is about 100 times the flow passage cross-sectional area of the heating flow passage forming portion 4A of the first heating mechanism 100A. The flow velocity of the fluid to be heated flowing through the internal flow passage 4sB of the heating mechanism 100B is about 1/100 of the flow passage of the fluid to be heated flowing through the internal flow passage 4sA of the first heating mechanism 100A.

  Furthermore, the flow passage volume of the heating flow passage forming part 4B of the second heating mechanism 100B is larger than the flow passage volume of the heating flow passage forming part 4A of the first heating mechanism 100A. In the present embodiment, the flow passage volume of the heating flow passage forming portion 4B of the second heating mechanism 100B is configured to be 500 times or more of the flow passage volume of the heating flow passage forming portion 4A of the first heating mechanism 100A. There is. With this configuration, the heating flow passage forming portion 4B of the second heating mechanism 100B functions as a pressure accumulator.

  The induction coil 5 is formed, for example, by winding a solid wire having a rectangular cross section in a cylindrical shape, and is disposed coaxially with the cylindrical core 2. In this embodiment, one end portion and the other end portion of the induction coil 5 extend from the side wall of the outer magnetic path forming portion 31 to the outside, and the external terminals T1 and T2 provided in the extending portion exchange external AC. Power is connected. The induction coil 5 may be configured to extend from the radial direction magnetic path forming portions 32 and 33 to the outside. An insulating material 9 a is provided on the cylindrical outer surface of the induction coil 5. In FIG. 2, the insulating material such as the insulating material 9 a is not shown.

  By applying an alternating voltage to the induction coil 5 of the first heating mechanism 100A, a magnetic flux flows through the cylindrical iron core 2 and the magnetic path forming portion 3 of the first heating mechanism 100A. A short circuit current flows into conductor pipe 4A which is a heating channel formation part by the magnetic flux concerned, and conductor pipe 4A performs Joule heat generation. Thus, water, which is a heated fluid flowing through the conductor pipe 4A, is heated to generate saturated steam.

  Moreover, a magnetic flux flows into the cylindrical iron core 2 and magnetic path formation part 3 of the 2nd heating mechanism 100B by applying an alternating voltage to the induction coil 5 of the 2nd heating mechanism 100B. A short circuit current flows into cylindrical conductor 4B which is a heating channel formation part by the magnetic flux concerned, and cylindrical conductor 4B Joule heat generation. From this, the saturated steam which is a to-be-heated fluid which flows through cylindrical conductor 4B is heated, and superheated steam is generated.

  The cooling pipe 6 includes a spirally wound outer cooling pipe 61 provided between the heating flow path forming portion 4 and the outer magnetic path forming portion 31, and the heating flow path forming portion 4 and the cylindrical iron core 2. And a spirally wound inner cooling pipe 62 provided therebetween. The outer cooling pipe 61 and the inner cooling pipe 62 are connected in series.

  The outer cooling pipe 61 is disposed on the radially outer side of the heating flow passage forming portion 4 coaxially with the cylindrical iron core 2. An insulating material 9 b is provided between the outer cooling pipe 61 and the heating flow path forming unit 4, specifically, along the cylindrical inner surface of the outer cooling pipe 61. In addition, in FIG. 1, although the outer side cooling pipe 61 was a thing of a single-layer winding, it may be a thing more than two-layer winding.

  The inner cooling pipe 62 is disposed radially inward of the heating flow passage forming portion 4 coaxially with the cylindrical iron core 2. An insulating material 9 c is provided between the inner cooling pipe 62 and the heating flow passage forming portion 4, specifically, along the cylindrical outer surface of the inner cooling pipe 62. The insulating material 9 d is also provided on the cylindrical inner surface of the inner cooling pipe 62. In addition, in FIG. 1, although the inner side cooling pipe 62 was a thing of a single-layer winding, it may be a thing more than two-layer winding.

  Furthermore, in the present embodiment, the first radial magnetic path forming portion 32 is provided with the annular first cooling flow path 7 through which the cooling medium flows, and the second radial magnetic path forming portion 33 is cooled. An annular second cooling flow passage 8 through which the medium flows is provided. Further, the second cooling flow passage 8 provided in the second radial magnetic path forming portion 33 of the first heating mechanism 100A, and the first provided in the first radial magnetic path forming portion 32 of the second heating mechanism 100B. The cooling flow channel 7 is shared.

  Thus, in the present embodiment, the fluid to be heated flows in the cooling pipe 6 and the cooling channels 7 and 8, and the fluid to be heated which has flowed through the cooling pipe 6 and the cooling channels 7 and 8 It is comprised so that it may flow to the heating flow-path formation part 4A of 1 heating mechanism 100A, and the heating flow-path formation part 4B of the 2nd heating mechanism 100B.

  Specifically, the inlet pipe 12 for the fluid to be heated is connected to the common cooling channel 7 (8), and the common cooling channel 7 (8) and the outer cooling pipe 61 of the second heating mechanism 100B Are connected by the connection pipe 13. Further, the inner cooling pipe 62 of the second heating mechanism 100B and the second cooling flow path 8 of the second heating mechanism 100B are connected by the connection pipe. With this configuration, the fluid to be heated introduced into the common cooling flow path 7 (8) flows through the outer cooling pipe 61 and the inner cooling pipe 62 of the second heating mechanism 100B in this order, and then the second heating mechanism 100B Flows into the second cooling channel 8 of

  The second cooling flow passage 8 of the second heating mechanism 100B and the first cooling flow passage 7 of the first heating mechanism 100A are connected by a connection pipe 15. The connection pipe 15 is provided through the inside of the cylindrical iron core 2 of the first heating mechanism 100A and the cylindrical iron core 2 of the second heating mechanism 100B. Further, the first cooling flow passage 7 of the first heating mechanism 100A and the inner cooling pipe 62 of the first heating mechanism 100A are connected by the connection pipe 16. Further, the outer cooling pipe 61 of the first heating mechanism 100A and the heating flow passage forming portion 4A of the first heating mechanism 100A are connected by the connection pipe 17. With this configuration, the fluid to be heated that has flowed into the second cooling channel 8 flows through the inner cooling pipe 62 and the outer cooling pipe 61 of the first heating mechanism 100A in this order, and then the heating channel of the first heating mechanism 100A. It flows through the heating channel forming part 4B of the forming part 4A and the second heating mechanism 100B in this order. And it is derived | led-out outside from the lead-out piping 18 connected to the outlet of the heating flow-path formation part 4B of 2nd heating mechanism 100B. In addition, the superheated steam derived | led-out from this lead-out piping 18 is introduce | transduced into the processing chamber where a to-be-processed object is processed using the said superheated steam.

  Next, the flow of the fluid to be heated of the fluid heating device 100 and the heating mode of the fluid to be heated will be described.

  Water, which is a fluid to be heated, is introduced from the introduction pipe 12 connected to the common cooling flow path 7 (8). Then, the fluid to be heated flows from the introduction pipe 12 into the common cooling channel 7 (8), and the first radial magnetic path forming portion 33 of the first heating mechanism 100A and the first of the second heating mechanism 100B. The radial magnetic path forming portion 32 is cooled and preheated by the radial magnetic path forming portions 32 and 33. Thereafter, the fluid to be heated flows through the connection pipe 13 and flows into the outer cooling pipe 61 and the inner cooling pipe 62 of the second heating mechanism 100B to cool the cooling pipes 61 and 62, and the cooling pipes 61, It is preheated by 62. The second radial magnetic path forming portion 33 of the first heating mechanism 100A is heated by the heating flow path forming portion 4A of the first heating mechanism 100A, and the first radial magnetic path forming of the second heating mechanism 100B is formed. The portion 32 and the cooling pipes 61 and 62 are heated by the heating flow passage forming portion 4B of the second heating mechanism 100B.

  Moreover, the to-be-heated fluid which flowed through the cooling pipes 61 and 62 of the 2nd heating mechanism 100B flows through the connection piping 14, flows in into the 2nd cooling channel 8 of the 2nd heating mechanism 100B, and the 2nd heating mechanism 100B. The second radial magnetic path forming portion 33 is cooled and preheated by the second radial magnetic path forming portion 33. Then, the fluid to be heated flows through the connection pipe 15 and flows into the first cooling channel 7 of the first heating mechanism 100A to cool the first radial magnetic path forming portion 32 of the first heating mechanism 100A. The first radial magnetic path forming portion 32 is preheated. Thereafter, the fluid to be heated flows through the connection pipe 16 and flows into the inner cooling pipe 62 and the outer cooling pipe 61 of the first heating mechanism 100A to cool the cooling pipes 61, 62, and the cooling pipes 61, It is preheated by 62. The second radial magnetic path forming portion 33 of the second heating mechanism 100B is heated by the heating flow path forming portion 4B of the second heating mechanism 100B, and the formation of the first radial magnetic path of the first heating mechanism 100A. The portion 32 and the cooling pipes 61 and 62 are heated by the heating flow passage forming portion 4A of the first heating mechanism 100A.

  Then, the fluid to be heated which has been preheated by the cooling channels 7, 8 and the cooling pipes 61, 62 of the first heating mechanism 100A and the cooling channels 7, 8 and the cooling pipes 61, 62 of the second heating mechanism 100B is The flow flows through the connection pipe 17 and flows into the heating flow passage forming portion 4A of the first heating mechanism 100A and the heating flow passage forming portion 4B of the second heating mechanism 100B. At this time, the fluid to be heated flowing through the heating flow passage forming portion 4A of the first heating mechanism 100A is heated by the induction heating heated flow passage forming portion 4A and becomes saturated steam. Moreover, the to-be-heated fluid which flows through the heating flow-path formation part 4B of 2nd heating mechanism 100B is heated by the heating flow-path formation part 4B by which induction heating was carried out, and becomes superheated steam. This superheated steam is led to the external or external pipe from the lead-out pipe 18 connected to the downstream end of the heating flow path forming portion 4B of the second heating mechanism 100B.

<2. Effects of this embodiment>
According to the fluid heating device 100 configured as described above, the heating flow path forming unit 4 serving as a heat source is disposed between the cylindrical iron core 2 and the magnetic path forming unit 3. The heat leaked to the outside can be confined inside the magnetic path forming portion 3. Further, in this configuration, since the cooling pipe 6 in which the cooling medium (water) flows is provided between the cylindrical iron core 2 and the magnetic path forming portion 3, the amount of use of the heat insulating material 101 can be reduced. Thermal safety can be improved. At this time, since the fluid to be heated flows through the cooling pipe 6, the fluid to be heated can be preheated using the heat leaked from the heating flow passage forming portion 4 to the outside. It is possible to efficiently heat the fluid to be heated by reducing the loss due to the heat radiation from the heat source.

  Further, in the present embodiment, since the first heating mechanism 100A and the second heating mechanism 100B are provided, the fluid to be heated can be easily heated to a desired temperature. At this time, since the flow passage cross-sectional area of the heating flow passage forming part 4B of the second heating mechanism 100B is larger than the flow passage cross-sectional area of the heating flow passage forming part 4A of the first heating mechanism 100A, the second heating mechanism 100B The flow velocity of the heated fluid flowing through the heating flow passage forming unit 4B can be made smaller than the flow velocity of the heated fluid flowing through the heating flow passage forming unit 4A of the first heating mechanism 100A, and the heat exchange in the second heating mechanism 100B Efficiency can be improved and heating to the desired temperature can be facilitated.

  Furthermore, in the present embodiment, the flow passage cross-sectional area and the flow passage volume of the heating flow passage forming portion 4B of the second heating mechanism 100B are the flow passage cross-sectional area and the flow passage of the heating flow passage forming portion 4A of the first heating mechanism 100A. Since it is larger than the volume, in particular, the heating flow passage forming part 4B of the second heating mechanism 100B exhibits the pressure accumulation function, and there is no need to provide a dedicated pressure accumulator, and the pulsating flow of the heated heated fluid is It can be reduced.

<3. Modified Embodiment of the Present Invention>
The present invention is not limited to the above embodiment.

  For example, the induction coil 5 and the cooling pipe 6 may be electrically connected in each of the heating mechanisms 100A and 100B, and an alternating voltage may be applied to the induction coil 5 and the cooling pipe 6 by an external AC power supply. By this configuration, the number of turns of the coil element for generating the magnetic flux inside the cylindrical iron core 2 can be increased.

  In the embodiment, the induction coil 5 is provided on the radially outer side of the outer cooling pipe 61. However, the induction coil 5 may be provided radially inward of the outer cooling pipe 61 or radially inner of the inner cooling pipe 62. You may arrange it.

  Furthermore, in the embodiment, the second radial magnetic path forming portion 33 of the first heating mechanism 100A and the first radial magnetic path forming portion 32 of the second heating mechanism 100B are connected by bonding or the like. Between them, for example, they may be connected via an intermediate member such as a heat insulating material, or the first radial direction of the second radial magnetic path forming portion 33 of the first heating mechanism 100A and the second heating mechanism 100B. The magnetic path forming portion 32 may be separated. At this time, the second cooling flow passage 8 of the first heating mechanism 100A and the first cooling flow passage 7 of the second heating mechanism 100B are not common, and may be individually provided.

  Moreover, the paths flowing through the respective portions of the fluid to be heated are not limited to the above embodiment. That is, the preheating path before flowing into the heating flow path forming portion 4A of the first heating mechanism 100A and the heating flow path forming portion 4B of the second heating mechanism 100B is not limited to the above embodiment. For example, in the above embodiment, the preheating path of the fluid to be heated is a single path up to the heating flow path forming portion 4A of the first heating mechanism 100A, but a plurality of paths having branch points or junctions It may be configured.

  In addition, the first cooling channel 7 and the second cooling channel 8 are formed between the outer surfaces of the first radial magnetic path forming portion 32 and the second magnetic path forming portion 33 as in the embodiment described above. Other than the above, it may be configured by piping through which the fluid to be heated flows. In this case, it is conceivable to provide the pipes to be the first cooling flow path 7 and the second cooling flow path 8 in contact with the outer surfaces of the first radial magnetic path forming portion 32 and the second magnetic path forming portion 33.

  In addition, another cooling medium may be flowed without flowing the fluid to be heated through the cooling pipe 6 and the cooling channels 7 and 8. In this case, although a separate cooling medium supply source is required, a cooling medium dedicated to cooling can be allowed to flow, and the thermal safety of the fluid heating device 100 can be further improved while reducing the amount of use of the heat insulating material 101. it can.

  Furthermore, in the embodiment, the heating flow passage forming portion 4A of the first heating mechanism 100A is formed of a spiral conductor pipe, and the heating flow passage forming portion 4B of the second heating mechanism 100B has a plurality of internal flow passages. Although it consisted of a cylindrical conductor, the structure of each heating flow-path formation part 4 is not restricted to this. For example, both may consist of a helical conductor pipe, and both may consist of a cylindrical conductor which has a plurality of internal flow paths.

  Further, the fluid heating device 100 of the present invention may have a plurality of first heating mechanisms 100A and a plurality of second heating mechanisms 100B. FIG. 5 shows a fluid heating device having one first heating mechanism 100A and two second heating mechanisms 100B. In this case, the heating flow passage forming portions 4B of the two second heating mechanisms 100B are connected in series via the connection pipe 19, and upstream of the heating flow passage forming portions 4B of the two second heating mechanisms 100B. The heating flow passage forming part 4A of the first heating mechanism 100A is connected via the connection pipe 11. The two second heating mechanisms 100B are the same as the first heating mechanism 100A and the second heating mechanism 100B of the embodiment, but the second radial magnetic path forming portion 33 of the one (upstream) second heating mechanism 100B. The first radial magnetic path forming portion 32 of the other (downstream side) second heating mechanism 100B is connected, for example, by bonding or the like. Then, the fluid to be heated which has flowed through the cooling channels 7 and 8 and the cooling pipes 61 and 62 of the heating mechanisms 100A and 100B is heated by the heating channel forming portion 4A of the first heating mechanism 100A and the second heating mechanism 100B. It is comprised so that it may flow through the flow-path formation part 4B. A lead-out pipe 18 is connected to the downstream end of the first radial direction magnetic path forming portion 32 of the second heating mechanism 100B on the downstream side. As described above, the heating performance of the fluid to be heated in the fluid heating device 100 can be improved if the plurality of second heating mechanisms 100B are provided.

  In addition, it goes without saying that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention.

100 ... fluid heating device 100A ... first heating mechanism 100B ... second heating mechanism 2 ... cylindrical iron core 3 ... magnetic path forming portion 31 ... outer magnetic path forming portion 32 ... First radial magnetic path forming portion 33 second radial magnetic path forming portion 4 heating flow path forming portion 5 induction coil 6 cooling pipe 61 outer cooling pipe 62 ... Inner cooling pipe 7 ... First cooling channel 8 ... Second cooling channel

Claims (9)

A first heating mechanism for heating the fluid to be heated;
A second heating mechanism that further heats the fluid to be heated heated by the first heating mechanism;
The first heating mechanism and the second heating mechanism are
Cylindrical iron core,
A magnetic path forming portion provided on an outer circumferential surface of the cylindrical core and forming a closed magnetic path together with the cylindrical core;
A heating flow path forming portion provided between the cylindrical iron core and the magnetic path forming portion, which generates heat by electromagnetic induction and heats a fluid to be heated flowing therein;
An induction coil provided between the cylindrical iron core and the magnetic path forming portion for generating a magnetic flux inside the cylindrical iron core;
And a cooling pipe provided between the cylindrical iron core and the magnetic path forming portion, through which a cooling medium flows,
The flow passage cross-sectional area of the heating flow passage forming portion of the second heating mechanism is larger than the flow passage cross-sectional area of the heating flow passage forming portion of the first heating mechanism,
The volume of the flow passage of the heat flow path forming portion of the second heating mechanism, much larger than the volume of the flow passage of the heat flow path forming portion of the first heating mechanism,
The cooling pipe includes an outer cooling pipe provided between the heating flow path forming portion and the magnetic path forming portion, and an inner cooling pipe provided between the heating flow path forming portion and the cylindrical iron core. fluid heating apparatus which comprises. The heating channel forming portion of the first heating mechanism is formed by winding a conductor pipe in a spiral shape,
The fluid heating device according to claim 1, wherein the heating flow passage forming portion of the second heating mechanism has a plurality of internal flow passages formed in the side wall of the cylindrical conductor along the axial direction. The cooling pipe is connected to the heating flow path forming unit,
The fluid heating apparatus according to claim 1 or 2 , wherein the fluid to be heated flows into the heating flow passage forming portion after flowing through the cooling pipe.   A first heating mechanism for heating the fluid to be heated;
  A second heating mechanism that further heats the fluid to be heated heated by the first heating mechanism;
  The first heating mechanism and the second heating mechanism are
  Cylindrical iron core,
  A magnetic path forming portion provided on an outer circumferential surface of the cylindrical core and forming a closed magnetic path together with the cylindrical core;
  A heating flow path forming portion provided between the cylindrical iron core and the magnetic path forming portion, which generates heat by electromagnetic induction and heats a fluid to be heated flowing therein;
  An induction coil provided between the cylindrical iron core and the magnetic path forming portion for generating a magnetic flux inside the cylindrical iron core;
  And a cooling pipe provided between the cylindrical iron core and the magnetic path forming portion, through which a cooling medium flows,
  The flow passage cross-sectional area of the heating flow passage forming portion of the second heating mechanism is larger than the flow passage cross-sectional area of the heating flow passage forming portion of the first heating mechanism,
  The channel volume of the heating channel forming part of the second heating mechanism is larger than the channel volume of the heating channel forming part of the first heating mechanism,
  The cooling pipe is electrically connected to the induction coil;
  An external AC power supply is connected to the cooling pipe and the induction coil. A first heating mechanism for heating the fluid to be heated;
A second heating mechanism that further heats the fluid to be heated heated by the first heating mechanism;
The first heating mechanism and the second heating mechanism are
Cylindrical iron core,
A magnetic path forming portion provided on an outer circumferential surface of the cylindrical core and forming a closed magnetic path together with the cylindrical core;
A heating flow path forming portion provided between the cylindrical iron core and the magnetic path forming portion, which generates heat by electromagnetic induction and heats a fluid to be heated flowing therein;
An induction coil provided between the cylindrical iron core and the magnetic path forming portion for generating a magnetic flux inside the cylindrical iron core;
And a cooling pipe provided between the cylindrical iron core and the magnetic path forming portion, through which a cooling medium flows,
The flow passage cross-sectional area of the heating flow passage forming portion of the second heating mechanism is larger than the flow passage cross-sectional area of the heating flow passage forming portion of the first heating mechanism,
The channel volume of the heating channel forming part of the second heating mechanism is larger than the channel volume of the heating channel forming part of the first heating mechanism,
The magnetic path forming portion connects the cylindrical outer core path forming portion provided on the radially outer side of the cylindrical iron core, and both axial end portions of the cylindrical core and the outer magnetic path forming portion. And a radial magnetic path forming portion,
The radial magnetic path forming portion is provided with a cooling flow passage through which a cooling medium flows,
The fluid heating device in which one side of the radial direction magnetic path formation part of the 1st heating mechanism and the other of the radial direction magnetic path formation part of the 2nd heating mechanism are connected . The cooling flow path provided in one of the radial magnetic path forming portions of the first heating mechanism and the cooling flow path provided in the other of the radial magnetic path forming portions of the second heating mechanism are common The fluid heating device according to claim 5, wherein   A first heating mechanism for heating the fluid to be heated;
  A second heating mechanism that further heats the fluid to be heated heated by the first heating mechanism;
  The first heating mechanism and the second heating mechanism are
  Cylindrical iron core,
  A magnetic path forming portion provided on an outer circumferential surface of the cylindrical core and forming a closed magnetic path together with the cylindrical core;
  A heating flow path forming portion provided between the cylindrical iron core and the magnetic path forming portion, which generates heat by electromagnetic induction and heats a fluid to be heated flowing therein;
  An induction coil provided between the cylindrical iron core and the magnetic path forming portion for generating a magnetic flux inside the cylindrical iron core;
  And a cooling pipe provided between the cylindrical iron core and the magnetic path forming portion, through which a cooling medium flows,
  The flow passage cross-sectional area of the heating flow passage forming portion of the second heating mechanism is larger than the flow passage cross-sectional area of the heating flow passage forming portion of the first heating mechanism,
  The channel volume of the heating channel forming part of the second heating mechanism is larger than the channel volume of the heating channel forming part of the first heating mechanism,
  The magnetic path forming portion connects the cylindrical outer core path forming portion provided on the radially outer side of the cylindrical iron core, and both axial end portions of the cylindrical core and the outer magnetic path forming portion. And a radial magnetic path forming portion,
  The radial magnetic path forming portion is provided with a cooling flow passage through which a cooling medium flows,
  The fluid heating device, wherein the fluid to be heated is configured to flow to the cooling pipe or the heating channel forming portion after flowing through the cooling channel. The heated fluid is water,
The fluid heating device according to any one of claims 1 to 7 , wherein superheated steam is generated by the first heating mechanism and the second heating mechanism. The first heating mechanism heats water to generate saturated steam,
The fluid heating device according to claim 8 , wherein the second heating mechanism heats saturated steam to generate superheated steam.