JP2009174768A - Superheated steam generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a superheated steam generator capable of generating superheated steam with extremely high energy efficiency. <P>SOLUTION: The superheated steam generator is equipped with a cylindrical container 3 equipped with an inlet 1 for introducing a raw material of superheated steam and an outlet 2 discharging the superheated steam, an induction heating coil 4 wound around an outer circumference of the cylindrical container 3, an exothermic body 5 housed in the cylindrical container 3 and heated by electromagnetic induction by carrying electricity to the induction heating coil 4, and a preheating tube 6 preheating the raw material of the superheated steam and supplying it to the inlet 1. The preheating tube 6 is wound around an outer side of the induction heating coil 4 and composed to be heated by the electromagnetic induction by carrying electricity to the induction heating coil 4 to preheat the raw material of the superheated steam circulated through an interior. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a superheated steam generator that can be used in various technical fields, and can generate superheated steam in a wide temperature range, for example, 120 ° C to 700 ° C, and cook, boil, boil, steam, bake. , Cultivation, roasting, drying, sterilization, sterilization, dissolution, melting, welding, cleaning, hot air, hot air, humidification, air conditioning, etc.

Various types of superheated steam generators using induction heating have been proposed, but the following Patent Document 1 is disclosed as preheating raw water introduced into an induction heating tank. In the superheated steam generator of Patent Document 1, an induction coil is wound around the outer periphery of a conductive cylindrical body having a lower end side inside as a stagnation zone, and the induction coil is made of a metal pipe, Water from the water supply section that supplies water to the water zone is supplied to the water-stagnation zone in a preheated state by cooling the induction coil through the hollow interior of the induction coil. .
JP 2003-297537 A

  However, in the conventional superheated steam generator, the raw water is merely preheated with the heat obtained by simply cooling the induction coil, so the preheating efficiency is not so high, and warm water can be obtained by preheating. . As a result, heating must be performed from hot water obtained by preheating until superheated steam is obtained at once by induction heating, which requires large electric power and energy efficiency is not so high.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a superheated steam generator that can generate superheated steam with extremely high energy efficiency.

  In order to achieve the above object, the superheated steam generator of the present invention includes a cylindrical container having an inlet for introducing a raw material of superheated steam and a discharge port for discharging superheated steam, and a coil wound around the outer periphery of the cylindrical container. An induction heating coil, a heating element housed in the cylindrical container and generating heat by electromagnetic induction by energization of the induction heating coil, a preheating pipe that preheats a raw material of superheated steam and supplies the raw material to the inlet And the preheating tube is configured to preheat a raw material of superheated steam that is wound around the outside of the induction heating coil and generates heat by electromagnetic induction by energization of the induction heating coil and circulates in the interior. This is the gist.

  The preheating pipe that preheats the raw material of the superheated steam and supplies it to the introduction port is a raw material of the superheated steam that is wound around the outside of the induction heating coil and generates heat by electromagnetic induction by energization of the induction heating coil and circulates inside Is preheated. Thus, since the raw material of the superheated steam is preheated by the heat generation of the preheating tube by electromagnetic induction by energizing the induction heating coil, it can be preheated with extremely high thermal efficiency as compared with the prior art. In addition, the heating element is heated by the magnetic field inside the coil generated by the induction heating coil, and the preheating tube is preheated by the magnetic field generated outside the coil, which has not been used for conventional heating. Steam can be generated. In addition, the presence of a conductive preheating tube around the outside of the coil exerts a shielding effect that reduces the influence of the induction heating coil noise on the surroundings, resulting in extremely low energy loss without the magnetic field escaping outside. Less.

  In the present invention, when the heating element is provided with a non-heating area so as to penetrate the central portion of the induction heating coil, the heating efficiency is relatively low due to the induction current because the distance from the coil is long inside the coil. By providing a non-heat generating area in the center of the coil, the non-heat generating area can be used for a flow path or the like, and the space can be effectively used. In addition, since the non-heat generating region is provided so as to penetrate the center of the induction heating coil, the heat capacity of the heat generating region is reduced accordingly, and magnetic flux concentrates on the annular heat generating region surrounding the non-heat generating region, The heating rate increases.

  In the present invention, when the distance between the preheating tube and the induction heating coil is set to be smaller than the radius of the induction heating coil, the thermal efficiency in the preheating tube can be ensured better.

  Next, the best mode for carrying out the present invention will be described.

  1 and 2 show a superheated steam generator according to an embodiment of the present invention.

  The superheated steam generator includes a cylindrical container 3 having an inlet 1 for introducing a superheated steam raw material and a discharge port 2 for discharging superheated steam, and an induction heating coil wound around the outer periphery of the cylindrical container 3. 4, a heating element 5 housed in the cylindrical container 3 and generating heat by electromagnetic induction by energizing the induction heating coil 4, and a preheating pipe 6 that preheats the raw material of the superheated steam and supplies it to the inlet 1. And.

  The cylindrical container 3 is formed in a bottomed cylindrical shape, and the upper opening is closed with a lid member 11. The lid member 11 is connected to a raw material introduction pipe 12 that forms the introduction port 1 and a discharge pipe 13 that forms the discharge port 2. The raw material introduction pipe 12 passes through the lid member 11, and the tip opening 14 extends slightly above the bottom of the cylindrical container 3.

  In this example, the heating element 5 is formed of a porous body made of a material heated by electromagnetic induction. The heating element 5 has a cylindrical shape in which an insertion hole 15 through which the raw material introduction tube 12 is inserted is formed at the center. Further, a plurality of flow passages 16 extending in the vertical direction in the drawing so as to be along the insertion hole 15 are formed in a portion outside the insertion hole 15 of the heating element 5.

  A cylindrical spacer 17 is accommodated in the bottom of the cylindrical container 3, and a plurality of heating elements 5 are stacked on the spacer 17. The spacer 17 is composed of a porous body, and a central through portion 18 communicates with the internal passage of the raw material introduction pipe 12, and supplies the raw material introduced from the raw material introduction pipe 12 to the heating element 5 through the porous body. It is like that.

  The raw material supplied to the heating element 5 is heated by the heat of the heating element 5 heated by induction, and becomes superheated steam. At this time, although there is a rapid pressure rise, the generated superheated steam is mitigated by passing through the flow passage 16. Further, a buffer space 19 for relaxing the pressure of superheated steam generated when the raw material is heated by the heating element 5 is provided in a region closer to the discharge port 2 than the heating element 5 in the cylindrical container 3. It is discharged from the discharge port 2 through the space 19.

  The preheating tube 6 is configured to preheat the raw material of superheated steam that is wound around the outside of the induction heating coil 4 and generates heat by electromagnetic induction by energization of the induction heating coil 4 and circulates inside. . That is, the preheating tube 6 is made of a magnetic material such as metal, and the raw material supplied from the raw material supply unit 20 is heated while passing through the preheating tube 6. A discharge portion 21 of the preheating pipe 6 is connected to the introduction pipe 12 so that the preheated raw material is supplied to the introduction port 1.

  On the other hand, as described above, the heating element 5 has the insertion hole 15 formed in the central portion, and this insertion hole 15 functions as a non-heating region C formed so as to penetrate the central portion of the induction heating coil 4. . The distance S between the preheating tube 6 and the induction heating coil 4 is set to be approximately equal to the distance T between the virtual center circle O of the heat generating region H that exhibits the annular shape of the heating element 5 and the induction heating coil. .

  As described above, the preheating pipe 6 that preheats the raw material of the superheated steam and supplies it to the inlet 1 is wound around the outside of the induction heating coil 4 and generates heat due to electromagnetic induction caused by energization of the induction heating coil 4. The raw material of superheated steam that circulates inside is preheated. Thus, since the raw material of the superheated steam is preheated by the heat generation of the preheating pipe 6 by electromagnetic induction by energization of the induction heating coil 4, it can be preheated with extremely high thermal efficiency as compared with the prior art. In addition, the heating element 5 is heated by the magnetic field inside the coil generated by the induction heating coil 4 and the preheating tube 6 is preheated by the magnetic field generated outside the coil, which has not been used for conventional heating. Superheated steam can be generated efficiently. In addition, the presence of the conductive preheating tube 6 in the peripheral portion outside the coil exhibits a shielding effect and reduces the influence of the noise of the induction heating coil 4 on the surroundings, so that the magnetic field does not escape to the outside and energy is lost. Is extremely low.

  In addition, since the heating element 5 is provided with a non-heating region C so as to penetrate the central portion of the induction heating coil 4, the coil is far from the coil inside the coil and the heating efficiency due to the induction current is relatively low. By providing the non-heat generating area C in the center of the above, the non-heat generating area C can be used as a flow path or the like, and the space can be effectively used. Further, since the non-heat generating region C is provided so as to penetrate the center of the induction heating coil 4, the heat capacity of the heat generating region is reduced accordingly, and the magnetic flux is concentrated on the annular heat generating region surrounding the non-heat generating region C. For this reason, the rate of temperature increase is increased.

  The distance S between the preheating tube 6 and the induction heating coil 4 is preferably set smaller than the radius of the induction heating coil. The distance S between the preheating tube 6 and the induction heating coil 4 is preferably set to be smaller than the distance T between the virtual center circle O of the heat generating region H that exhibits the annular shape of the heating element 5 and the induction heating coil 4. . By doing in this way, the thermal efficiency in the preheating pipe | tube 6 is ensured more favorably.

  FIG. 3 shows a superheated steam generator according to a second embodiment of the present invention.

  In this example, the induction heating coil 4 a is a tubular body, the raw material is introduced to one end side of the induction heating coil 4 a, and the other end side of the induction heating coil 4 a is connected to the raw material supply unit 20 of the preheating pipe 6. Thereby, when the raw material is supplied to the induction heating coil 4a and the coil is cooled, the raw material is preheated, and the raw material preheated in the induction heating coil 4a is further introduced into the preheating pipe 6. Other than that is the same as that of the said 1st Embodiment, and attaches | subjects the same code | symbol to the same part. This embodiment also has the same effects as the first embodiment.

  In each of the above embodiments, both the raw material introduction port 1 and the discharge port 2 are formed on one end side of the cylindrical container 3. However, the present invention is not limited to this, and the raw material introduction port 1 is disposed on one end side. The discharge port 2 may be provided on the other end side.

  Further, water can be typically cited as a raw material used in the superheated steam generator, but the present invention is not limited to this, and various raw materials can be used.

It is a longitudinal cross-sectional view which shows the superheated steam generator of one Embodiment of this invention. It is a cross-sectional view of the superheated steam generator. It is a longitudinal cross-sectional view which shows the superheated steam generator of 2nd Embodiment.

Explanation of symbols

1: Introduction port 2: Discharge port 3: Cylindrical container 4: Induction heating coil 4a: Induction heating coil 5: Heating element 6: Preheating tube 11: Lid member 12: Raw material introduction tube 13: Discharge tube 14: Tip opening 15: Insertion hole 16: Flow path 17: Spacer 18: Through part 19: Buffer space 20: Raw material supply part 21: Discharge part

Claims (3)

A cylindrical container provided with an inlet for introducing superheated steam raw material and a discharge outlet for discharging superheated steam, an induction heating coil wound around the outer periphery of the cylindrical container, and housed in the cylindrical container A heating element that generates heat by electromagnetic induction by energizing the induction heating coil, and a preheating pipe that preheats the raw material of the superheated steam and supplies the raw material to the inlet,
The preheating tube is configured to preheat a raw material of superheated steam that is wound around the outside of the induction heating coil and generates heat by electromagnetic induction by energization of the induction heating coil and circulates in the interior. A superheated steam generator.   The superheated steam generator according to claim 1, wherein the heating element is provided with a non-heating region so as to penetrate a central portion of the induction heating coil.   The superheated steam generator according to claim 2, wherein a distance between the preheating tube and the induction heating coil is set smaller than a radius of the induction heating coil.

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