Electromagnetic induction heat source device and steam generator, warm air generator, and cool air generator utilizing the same

Abstract

To provide an electromagnetic induction warm air generator that can be incorporated into various production lines and saves space, capable of not only generating warm air and heating but also producing cool air and cooling effects.SOLUTION: A rotor 1a, equipped with multiple permanent magnets 5 mounted on a shaft 1 as its rotational axis, is inserted into the interior of a heated pipe 2. The heated pipe 2 features a coil-shaped specific heat medium flow path 8 wound around its outer circumference. The rotor 1a and the heated pipe 2 are housed within a cylindrical outer jacket 3. Multiple air-blowing groove strips 13 are formed along the inner circumference of a cylindrical wall 7 of the outer jacket 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an electromagnetic induction heat source device that generates steam, warm air heating, and hot water using Joule heat obtained by generating eddy currents using permanent magnets, and also generates cold air for cooling by utilizing the heat of vaporization when a heat medium evaporates, contributing to the heating and cooling of various factories, agricultural facilities, and ordinary homes. [Background technology]

[0002] Various electromagnetic induction heating devices have been proposed that use an induction heating technique in which an AC magnetic field is generated by an AC current. For example, in an induction heating device consisting of a conductive object to be heated and an AC magnetic field generating means, an induction heating device (see Patent Document 1) has been proposed in which the DC magnetic field generating means is a permanent magnet, and an AC magnetic field is applied to this DC magnetic field to rapidly heat the object to be heated, and a heating device (see Patent Document 2) has been proposed in which multiple permanent magnets are arranged around the outer periphery of a rotary in which eddy currents can be generated.

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-343541 [Patent Document 2] Republished WO2003 / 053103 [Patent Document 3] Patent No. 5720937 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] However, the above-mentioned conventional devices are used for drying and heating industrial materials, and there are almost no examples of their application as heating devices in ordinary homes or in the agricultural field.

[0005] Therefore, the present inventors have previously proposed in Patent Document 3 an electromagnetic induction type hot air generator that has a simple configuration and is useful as a highly efficient, safe and economical heat source for use in ordinary homes and agricultural fields.

[0006] The electromagnetic induction hot air generator of Patent Document 3 is generally composed of a rotatable flat rotor with a permanent magnet disposed inside, a heat generating unit located near the rotor and containing a conductive material in the magnetic field generated by the permanent magnet, and a hot air capture plate located near the heat generating unit and perforated with multiple hot air holes. The device offers the following advantages: "Since the conductive material generates heat by eddy currents, it has high thermal efficiency and is an eco-friendly heat source since it does not generate carbon dioxide. It also consumes little power, keeping running costs low. Furthermore, since the rotor has a simple structure in which a permanent magnet is disposed inside and rotated near the conductive material, it is less prone to breakdowns and easier to maintain. Temperature control is also easy, requiring only adjustment of the rotor's rotation speed. The hot air capture plate perforated with multiple hot air holes efficiently captures Joule heat generated in the heat generating unit."

[0007] The inventors have made improvements to the electromagnetic induction hot air generator to make it even easier to use. The inventors have carried out extensive research to develop a device that can not only generate hot air and hot water, but also cool air and provide cooling by utilizing the heat of vaporization that occurs when a specific heat medium evaporates due to the heat generated, and have developed a device that can not only heat water but also cool and heat the air by electromagnetic induction using permanent magnets. [Means for solving the problem]

[0008] The electromagnetic induction heat source device of the present invention has a first feature in that it comprises a cylindrical body made of a conductive material with hot air circulation holes or specific heat medium circulation passages on its outer periphery, and a rotor with a plurality of permanent magnets attached, the rotor having a shaft passing longitudinally through the center of the cylindrical body as its axis of rotation. When the rotor rotates, electromagnetic induction generates Joule heat in the cylindrical body, dissipating hot air from the hot air circulation holes and heating the specific heat medium flowing through the specific heat medium circulation passage. A second feature is that the hot air circulation holes or specific heat medium circulation passage are arranged in a barrel roll (spiral) shape. A third feature is that a heat capture guide plate is provided following the arrangement of the hot air circulation holes or heat medium circulation passage.

[0009] The electromagnetic induction heat source device of the present invention is useful for steam generators for power generation, hot air generators in agricultural facilities, and heating and cooling in various factories, agricultural facilities, and ordinary homes. Heat transfer media that can be used in the present invention include water, steam, heated air, gas, oil, etc. [Effects of the Invention]

[0010] The electromagnetic induction heat source device of the present invention has the following excellent effects. (1) Because eddy currents cause the conductive material to heat up, it is an eco-friendly heat source with good thermal efficiency and no carbon dioxide emissions. It also consumes little electricity, keeping running costs low. (2) By adopting an axial flow type, it can be incorporated into various production lines and space can be saved. (3) By selecting a specific heat medium or utilizing the heat of vaporization when the specific heat medium evaporates, not only hot air generation and heating action but also cold air and cooling action can be generated, making it possible to not only heat and supply hot water but also air conditioning and heating. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an exploded perspective view showing an embodiment of an electromagnetic induction heat source device according to the present invention. [Figure 2] (a) is a partially cutaway perspective view of the electromagnetic induction heat source device, and (b) is a cross-sectional view taken along line A-A. [Figure 3] 1A and 1B are a front cross-sectional view and a cross-sectional view taken along line BB in FIG. 1A, respectively, which schematically show an embodiment of a water heater according to the present invention. [Figure 4] 1 is a front cross-sectional view schematically showing an embodiment of seawater separation by a steam generator according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] This invention utilizes the phenomenon that by rotating a rotor with a permanent magnet with strong magnetic force inside it near a conductive material such as a metal plate at high speed, N and S magnetic poles alternately cross the conductive material jacket that surrounds the rotor, resulting in eddy currents being generated in the conductive material itself due to electromagnetic induction, and these eddy currents are converted into thermal energy, causing the conductive material to heat up.

[0013] As the conductive material, it is preferable to select a metal with good electrical conductivity, such as copper, silver, aluminum, or stainless steel, in which eddy currents are easily generated by magnetic force.

[0014] It is preferable to use a permanent magnet with a surface magnetic field of 3000 gauss or more, such as a neodymium magnet or samarium magnet. The stronger the magnetic force of the permanent magnet, the higher the temperature at which the conductive material will heat up. The permanent magnet rotates around the conductive material at several hundred rpm or more. The strength of the permanent magnet, the number of poles, and the rotation speed are determined according to the required amount of heat to be generated and the application. The temperature at which heat is generated can be easily adjusted by adjusting the rotation speed of the rotor.

[0015] As the material for the heated pipe 1 and the cylindrical body of the jacket 3, it is preferable to select a metal with good electrical conductivity such as copper, silver, aluminum, stainless steel, etc., similar to the conductive material used for the rotor. [Example]

[0016] 1 and 2, the electromagnetic induction heat source device of this embodiment comprises a heated pipe (first cylindrical body) 2 with a coil-shaped specific heat medium flow passage 8 wound around its outer periphery, and a cylindrical rotor 1a with a plurality of permanent magnets 5 attached, with a shaft 1 extending longitudinally through the inside of the heated pipe (first cylindrical body) 2, and the rotor 1a and heated pipe (first cylindrical body) 2 are housed within a cylindrical outer jacket (second cylindrical body) 3. Inside the cylindrical wall 7 of the outer jacket 3, a plurality of barrel-roll (spiral)-shaped cooling and heating guide fins (heat capture plates) 6 are erected along the inner periphery, and a plurality of air-blowing grooves 13 are formed.

[0017] When the rotor 1a rotates, electromagnetic induction occurs, generating Joule heat in the heated pipe 2, which dissipates hot air from the multiple heat dissipation holes 2a drilled in the heated pipe 2, and the device is used as a heat source device that heats the specific heat medium (for example, tap water) flowing through the specific heat medium flow passage 8 to produce hot water. In other words, the device of this embodiment is an axial flow type, which allows it to be incorporated into various production lines and saves space. Note that a drive source such as a motor that rotates the shaft 1 is not specifically shown here.

[0018] Furthermore, it is preferable that the heat radiation holes 2a and the specific heat medium flow passages 8 are formed in a barrel roll (spiral) shape, which allows for a large specific surface area. The hot air generated in the multiple air supply grooves 13 is blown to the outside as hot air by the negative pressure of the propeller 4 provided at the tip of the shaft 1.

[0019] The heat capture plate 6 is a means for capturing and collecting Joule heat generated in the heated pipe 2, which is the heat-generating part, and as shown in Figure 2, it is covered with an approximately cylindrical outer jacket (second cylinder) 7 having an aluminum cold and heat guide fan (hot air capture plate) 6 with multiple air flow grooves 6.

[0020] Then, room temperature air or water is introduced into the specific heat medium passage 8 inside the heated pipe 2, which generates heat through electromagnetic induction, and is heated using this thermal energy to produce hot air, warm air, warm water, or steam.By selecting a specific heat medium or utilizing the heat of vaporization when the specific heat medium evaporates, not only hot air and heating effects can be generated, but also cold air and cooling effects can be produced, making it possible to not only heat and supply hot water, but also air conditioning and heating. [Example]

[0021] Next, an example in which the present invention is applied to a water heater will be described. For convenience, the same components as those in the first embodiment will be denoted by the same reference numerals. As shown in Figure 3, in this embodiment, a cylindrical rotor 1a equipped with multiple permanent magnets 5 is inserted into the inner cylinder of the jacket 3, which is called a jacket tank and has a double-layered body consisting of an outer cylinder and an inner cylinder. The rotor 1a has a vertically extending shaft 1 as its rotation axis and is fitted with multiple permanent magnets 5. In this case, the inner cylinder corresponds to the heated pipe (first cylinder) 2. A plurality of heat-conducting plates 15 are radially arranged in a spiral pattern between the outer and inner cylinders. Room-temperature water (CW) that flows in through the inlet 3a of the tap water inlet pipe 11 and is stored is heated to hot water (HW) and supplied from the outlet 3b via the hot water outlet pipe 12. In the figure, reference numeral 9 denotes an on-off valve for each flow path. [Example]

[0022] Next, an example of applying the present invention to a solid-liquid separator for separating fresh water and salt from seawater is shown. As shown in Figure 4, the basic configuration of this embodiment is the same as that of the water heater described in Example 3. However, in this embodiment, stored seawater is heated to a temperature at which the water evaporates. This is called distillation. The liquid water vapor WV flows from the outlet 3b and is stored in an underground water storage tank 10 or cooling tank 14. Fresh water PW is pumped up by a pump P for use. The solid salt separated by distillation is extracted from the precipitated salt outlet 16 provided in the mantle 3.

[0023] That is, an electromagnetic induction heat source device is installed inside the tank, generating an alternating magnetic field to heat the tank body, which is made of a conductive material. The generated thermal energy is then used to heat the liquid inside the tank. In this way, instead of using an indirect heat exchanger, the pipe itself, which is made of a conductive material, is heated by electromagnetic induction, and the generated thermal energy can be used to heat the specific heat medium flowing inside the pipe. This method can be applied to hot water cleaning devices that store hot water in a tank using circulating heating, boiler feedwater tanks, etc.

[0024] Therefore, it can be directly installed in water supply and drainage pipes, air supply pipes, and piping or ducts for air conditioning and heating equipment, eliminating the need for a separate heating equipment. In this embodiment, the fluid flowing through the heating element is fresh water or seawater, but it goes without saying that the fluid may also be a heat transfer medium such as oil, air, or gas. [Industrial Applicability]

[0025] The device of the present invention is highly practical and extremely useful, as it can be applied to steam generators for power generation, hot air generators in agricultural facilities, various factories, agricultural facilities, and heating and cooling facilities in ordinary homes. [Explanation of symbols]

[0026] 1 Shaft (rotating axis) 1a Magnet attachment body (rotor) 1b Bearing 2 Heated pipe (first cylinder) 2a Heat radiation hole 3. Cloak (second cylindrical body) 3a Inlet 3b Outlet 4 propellers 5. Permanent magnets 6 Heat / cool guide fin (aluminum plate) 7. Cloak (second cylindrical body) 8 Specific heat medium flow path (snake coil) 8a Specific heat medium inlet 8b Specific heat medium outlet 9 Valves 10 Underground Water Tank 11 Waterworks Immigration Bureau 12 Hot water discharge pipe 13 Ventilation groove 14 Underground cooling tank 15 Heat conduction plate 16 Precipitated salt outlet 17 Steam distribution pipe

Claims

1. An electromagnetic induction heat source device characterized by comprising a cylindrical body made of a conductive material and having hot air flow holes or specific heat medium flow passages on its outer surface, and a rotor having a plurality of permanent magnets attached, with a shaft passing longitudinally through the center of the rotor as the rotation axis, wherein Joule heat is generated in the cylindrical body by the electromagnetic induction action that occurs when the rotor rotates, and hot air is dissipated from the hot air flow holes and the specific heat medium flowing through the specific heat medium flow passage is heated.

2. 2. The electromagnetic induction heat source device according to claim 1, wherein the hot air flow holes or the specific heat medium flow passages are arranged in a barrel roll (spiral) shape.

3. 3. The electromagnetic induction heat source device according to claim 1, wherein a heat capture guide plate is provided in accordance with the arrangement of the hot air flow holes or the specific heat medium flow passages.

4. A steam generator using the electromagnetic induction heat source device according to claim 1, 2 or 3.

5. A hot air generator using the electromagnetic induction heat source device according to claim 1, 2 or 3.

6. A cold air generator using the electromagnetic induction heat source device according to claim 1, 2 or 3.

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