JP2016167460A - Electric heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric heating device of pressurized fluid such as water and air, in which the pressurized fluid such as high-temperature water, high-temperature steam and high-temperature air jetted from a nozzle is produced as high-temperature pressurized fluid in a short time and with excellent thermal efficiency.SOLUTION: In an electric heating device of fluid having tubes 30 for forming a passage of the fluid in the inside thereof and electric lines 21 wound around the tubes, a thermal insulation material 22 is provided around the tubes, an electric resistance heating part A is constituted by the electric lines and the insulation material, a core 40 is provided in the passage of the fluid formed in the tubes, and electromagnetic induction is generated by the core using the electric lines as an electromagnetic coil, thereby heating the fluid in the passage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric heating device for pressurized fluid such as water and air passing through a heating pipe.

  Conventionally, in this type of electric heating device for pressurized fluid such as water and air, there is a cylindrical electric heater of Patent Document 1 invented by the applicant of the present application, and a spot such as a high-pressure steam cleaner, metal, synthetic resin, etc. Contributed to the heating tube industry.

Japanese Patent No. 2539686

  Regarding the electric heating device for pressurized fluid, there is a further demand for expecting high-temperature heating with high efficiency in a short time, and the inventor has succeeded in improving the cylindrical electric heater correspondingly. . The present invention provides an electric heating device capable of improving the thermal efficiency and obtaining a high-temperature pressurized fluid in a short time.

  In the fluid electric heating device according to the present invention, an electric wire is wound around a tube forming a fluid passage therein, a heat insulating material is provided around the tube, and the electric wire and the heat insulating material A fluid in a fluid passage is heated by electrical resistance, a core is provided in the fluid passage in the tube, and the core is electromagnetically heated by the core using the electric wire as an electromagnetic coil. And

  Moreover, the said electric heating apparatus has provided the helical fin in the outer peripheral surface of the said core in the said fluid channel | path.

  In addition, the electric heating device includes a preheating pipe / heat insulation pipe connected to an inlet side end of the pipe, and the preheating pipe / heat insulation pipe is connected to the electric resistance heating unit configured by the electric wire and the heat insulating material. It is wound around.

  The fluid electric heating apparatus according to the present invention uses a combination of electric resistance heating and electromagnetic induction heating to improve thermal efficiency and obtain a high-temperature pressurized fluid in a short time.

  In addition, the electric heating device is intended to improve the thermal efficiency and obtain a high-temperature pressurized fluid in a short time by applying a spiral flow motion to the passage of pressurized fluid such as water or air that is the object to be heated. .

  In addition, the electric heating device preheats the pressurized fluid and insulates the outer periphery of the device before full-scale fluid heating, thereby improving the thermal efficiency and obtaining the high-temperature pressurized fluid in a short time.

It is principle explanatory drawing which showed the Example of this invention in sectional drawing. It is principle explanatory drawing which showed another Example of this invention in sectional drawing.

  Preferred forms of the invention are described in Example 1 and Example 2.

  FIG. 1 shows a principle explanatory diagram of Embodiment 1 of an electric heating apparatus for pressurized fluid such as water and air according to the present invention.

  The electric heating apparatus for pressurized fluid such as water and air according to the first embodiment of the present invention includes an electrical resistance heating section A, an electromagnetic induction heating section B, and a fin spiral formation 50 capable of heating by spiral movement of the pressurized fluid. Has been.

  The electric resistance heating part A is composed of a metal cylinder 10, a bobbin 20, an electric heating wire 21, and a heat-resistant fire-resistant and electrically insulating granular oxide magnesium 22.

  The metal cylinder 10 is made of stainless steel and includes an inner cylinder 11 and an outer cylinder 12.

  The bobbin 20 is made of heat insulating and fire resistant magnesium oxide, and a known electric heating wire 21 such as a nichrome wire is wound in a coil shape.

  The bobbin 20 around which the electric heating wire 21 is wound is inserted between the outer cylinder 12 and the inner cylinder 11, and is strongly compressed and filled with adiabatic and fire-resistant and electrically insulating powdered magnesium oxide. Yes.

  The electromagnetic induction heating unit B includes a stainless steel nozzle tube 30, a heat-resistant magnetic metal round bar-shaped core 40, and a fin spiral formed product 50.

  The nozzle tube 30 is formed so that a pressurized fluid can flow in from a fluid inflow hole 31 at the rear of the tube and flow out from the tip of the nozzle 32.

  The core 40 generates heat using the electric heating wire 21 wound around the bobbin 20 in a coil shape as an electromagnetic coil, and is fixed to the nozzle tube 30 via a fin spiral formation 50 wound around the core 40. The

  The fin helix formation 50 is made of a heat-resistant metal such as nickel or aluminum, and generates heat by electromagnetic induction heating in the same manner as the core 40.

  Further, the fin spiral formation 50 is fixed to the core in the nozzle tube 30 and is closely inserted into the nozzle tube 30 so as to pass through the nozzle tube 30 from the fluid inflow hole 31 to the tip of the nozzle 32. Is heated at a high temperature by causing a spiral flow motion to further improve thermal efficiency.

  Therefore, the electric heating apparatus for pressurized fluid such as water and air according to the first embodiment of the present invention can be jetted out of the nozzle 32 at a high temperature in a short time while dramatically improving the thermal efficiency of the pressurized fluid.

  As described above, the electrical heating device for pressurized fluid according to the first embodiment of the present invention includes the inner cylinder 11 of the metal cylinder 10 including the inner cylinder 11 and the outer cylinder 12, and the outer cylinder 12 as illustrated. Between the outer cylinder 12 and the bobbin 20 and between the inner cylinder 11 and the bobbin 20, between the outer cylinder 12 and the bobbin 20. In addition, the electric resistance heating part A which is strongly compressed and filled with the granular refractory heat insulating material 22 and the refractory metal inserted so as to be in close contact with the inner peripheral surface of the inner cylinder 11 of the metal cylinder 10, A nozzle tube 30 that allows pressurized fluid such as air to flow from the fluid inflow hole 31 and flow out from the tip of the nozzle 32, and a refractory metal rod core 40 is provided in the tube of the nozzle tube 30, and the refractory metal rod The pressurized fluid is applied to the outer peripheral surface of the core 40 from the fluid inflow hole 31. An electromagnetic induction heating section B composed of a tightly inserted fin-formed product 50 that is allowed to flow in a spiral manner toward the nozzle 32 tip direction, and is inserted from the nozzle 32 tip. The pressurized fluid can be ejected as a high-temperature pressurized fluid in a short time with high thermal efficiency.

  FIG. 2 shows a principle explanatory diagram of Embodiment 2 of the electric heating apparatus for pressurized fluid such as water and air according to the present invention.

  The electric heating apparatus for pressurized fluid such as water and air according to the second embodiment of the present invention includes an electrical resistance heating unit A, an electromagnetic induction heating unit B, and a fin spiral formation 50 capable of heating by spiral flow motion of the pressurized fluid. And a preheated and heat insulating tube 60 for pressurized fluid.

  Since the electrical resistance heating unit A, the electromagnetic induction heating unit B, and the fin spiral formed product 50 are the same as those in the first embodiment, detailed description thereof is omitted.

  The pressurized fluid preheating pipe / heat insulating pipe 60 is a pipe that allows the pressurized fluid to flow from the fluid supply hole 61 of the pipe 60 and allows the preheated pressurized fluid to flow into the fluid inlet hole 31 of the nozzle pipe 30. It also serves as a heat insulating pipe on the outer periphery of the part A.

  Therefore, the electric heating device for pressurized fluid such as water and air of the present embodiment can preheat the fluid, so that the thermal efficiency is further improved compared with the electric heating device of the first embodiment, and the high temperature pressurized fluid is nozzled in a short time. 32 can be ejected from the tip.

  As described above, the electric heating device for pressurized fluid such as water and air according to the second embodiment of the present invention has the above-described inner portion of the metal tube 10 including the inner tube 11 and the outer tube 12 as illustrated in FIG. Between the cylinder 11 and the outer cylinder 12, a fireproof and heat insulating bobbin 20 around which an electric heating wire 21 is wound is inserted, between the outer cylinder 12 and the bobbin 20, and between the inner cylinder 11 and the bobbin. 20 is made of a refractory metal inserted in close contact with the inner peripheral surface of the inner cylinder 11 of the metal cylinder 10 and the electric resistance heating part A that is strongly compressed and filled with the granular refractory heat insulating material 22. A nozzle pipe 30 that allows a pressurized fluid such as water or air to flow into the pipe from the fluid inflow hole 31 and flow out from the tip of the nozzle 32; and a heat-resistant metal rod core 40 is provided in the pipe of the nozzle pipe 30; On the outer peripheral surface of the refractory metal rod core 40, the pressurized fluid is supplied to the fluid inflow hole. An electromagnetic induction heating section B comprising a fin-fixed material 50 fixedly inserted in a spiral manner from 1 to the nozzle 32 in a spiral direction and ejected; The pressurized fluid circulation pipe is tightly wound around the outer peripheral surface of the cylinder 12, and is allowed to flow from the fluid supply hole 61 of the pressurized fluid into the fluid inflow hole 31 of the nozzle pipe 30. A preheating pipe / heat insulation pipe 60, and the pressurized fluid can be ejected from the tip of the nozzle 32 as a high-temperature pressurized fluid in a short time with high thermal efficiency.

  In the electric heating device according to the first and second embodiments of the present invention, like the cylindrical electric heater of Japanese Patent No. 2539686, the electric resistance heating unit A having excellent electric insulation and withstand voltage and good thermal conductivity, and electric resistance While using the coil winding of the electric heating wire 21 used in the heating part A, electromagnetic induction heating by a metal nozzle tube 30 and a heat-resistant metal rod core 40 (or electromagnetic induction heating when the fin formation 50 is a metal) The pressurized fluid is electrically heated by the part B.

  The present invention is heated by electrical heating by the electric resistance heating unit A and the electromagnetic induction heating unit B, and by spiral flow of pressurized fluid such as water or air that is heated through the nozzle tube 30 toward the tip of the nozzle 32. The physical fluid is heated at a high temperature in a short time with high thermal efficiency and ejected from the nozzle tip. In addition to these, if a preheating pipe 60 for pressurized fluid is used in combination, the pressurized fluid is heated at a high temperature more efficiently.

  The electric heating apparatus for pressurized fluid such as water and air according to the present invention can be easily manufactured and mass-produced.

DESCRIPTION OF SYMBOLS 10 Metal cylinder 11 Inner cylinder 12 Outer cylinder 20 Bobbin 21 Electric heating wire 22 Granular heat insulation refractory material A Electrical resistance heating part 30 Nozzle pipe 31 Fluid inflow hole 32 Nozzle 40 Metal round bar core 50 Fin spiral formation B Electromagnetic induction heating Section 60 Fluid preheating pipe / heat insulation pipe 61 Fluid supply hole

Claims (3)

Wind an electrical wire around the tube that forms the fluid passage inside,
A heat insulating material is provided around the tube, and the electric wire and the heat insulating material are used to heat the fluid in the fluid passage by electric resistance.
Providing a core in the fluid passage in the tube;
An electric fluid heating apparatus, wherein the electric wire is an electromagnetic coil and the core electromagnetically heats the fluid in the fluid passage.   The fluid electric heating device according to claim 1, wherein a spiral fin is provided on an outer peripheral surface of the core in the fluid passage. Connect the preheating tube and heat insulation tube to the inlet side end of the tube,
3. The fluid electric heating device according to claim 1, wherein the preheating tube and the heat insulating tube are wound around an electric resistance heating unit constituted by the electric wire and the heat insulating material. .

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