Electromagnetic heater with built-in electromagnetic induction coil and use method

Abstract

The invention discloses an electromagnetic heater with a built-in electromagnetic induction coil and a using method, the electromagnetic heater comprises a closed shell, the closed shell is used for insulating and closing an electromagnetic induction line, a heat exchange pipeline assembly is arranged in the closed shell, an electromagnetic heating assembly is arranged in the closed shell, and the electromagnetic heating assembly is arranged in the closed shell. The electromagnetic heating device is provided with the heat exchange pipeline assembly and the electromagnetic heating assembly, the electromagnetic heating assembly is arranged on the inner side of the heat exchange pipeline assembly, an electromagnetic induction coil is arranged in a built-in mode, traditional resistance heating is replaced with electromagnetic induction heating, and the electromagnetic heating device is more convenient to use. Heat loss and potential nitrogen harm caused by nitrogen filling are avoided, pollutants such as smoke dust and waste gas cannot be generated, the device is more environmentally friendly and sanitary, the heating efficiency is improved, the temperature rising speed is increased, and the temperature control accuracy is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnetic heaters, and in particular relates to an electromagnetic heater with a built-in electromagnetic induction coil and a use method thereof. Background Art

[0002] Electromagnetic heating technology has been widely used in various fields of industrial heating. The working principle of electromagnetic induction heating is mainly based on Faraday's law of electromagnetic induction. Its core is to use the electromagnetic induction phenomenon to convert electrical energy into thermal energy: when the alternating current passes through the induction coil, an alternating magnetic field is generated, and an induced eddy current is generated inside the conductor placed therein. When the eddy current flows inside the conductor, the electrons in the conductor accelerate and generate heat. Compared with other heating methods, this heating method can be connected to high voltage electricity, has a faster heating rate, stronger temperature control ability, and avoids direct contact with the heating medium. In a high-voltage working environment, the electromagnetic heating technology will save the cost of the transformer compared to resistance heating, which greatly reduces the equipment cost.

[0003] Most electric heaters in the traditional polysilicon field use resistance heating, such as a radiation heater described in Chinese patent CN104061684 A. The resistance heater heats the pipeline mainly by radiation heat transfer. The pipelines are staggered inside the equipment, and electric heating cores are evenly arranged on the outside and inside of the pipelines. The inside of the equipment is filled with nitrogen, and the medium to be heated exchanges heat with the pipeline to achieve the heating purpose.

[0004] The advantages of the above patent are relatively high thermal efficiency and explosion-proof structure, but there are also some disadvantages: 1. The actual heating efficiency is low and it consumes more energy than electromagnetic induction heating; 2. The main heat transfer mode of the equipment is radiation heat transfer, but considering that nitrogen is needed to prevent oxidation of the resistance wire, nitrogen will absorb part of the heat, resulting in some actual heat loss; 3. Resistance heating takes a long time to reach the preset temperature, and the heating speed is relatively slow. For some working conditions that require a high heating rate, resistance heating has fatal defects; 4. The temperature control of resistance heating is not accurate, which may cause large temperature deviation. There are many working conditions where heating uniformity must be considered, otherwise it will cause irreversible losses to the heated medium; 5. Resistance heating may produce pollutants such as smoke and exhaust gas in some cases, which is relatively poor in environmental protection and does not meet the current national environmental protection requirements; For this purpose, we propose an electromagnetic heater with a built-in electromagnetic induction coil and a method of using the same. Summary of the invention

[0005] The object of the present invention is to provide an electromagnetic heater with a built-in electromagnetic induction coil and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an electromagnetic heater with a built-in electromagnetic induction coil, comprising: A closed shell, the closed shell is used for insulating and enclosing the electromagnetic induction line; a heat exchange pipe assembly, wherein the heat exchange pipe assembly is arranged in the closed shell; The electromagnetic heating component is arranged in the closed shell, and the electromagnetic heating component is arranged on the inner side of the heat exchange pipe component.

[0007] Preferably, the outside of the heat exchange pipe assembly is wrapped with a heat insulation layer, and the heat exchange pipe assembly includes a heat exchange pipe and spiral guide strips arranged at equal intervals in the heat exchange pipe.

[0008] Preferably, the electromagnetic heating component comprises an electromagnetic induction coil and an insulating column, the electromagnetic induction coil is spirally wound on the insulating column, coil guide bars with equal spacing are spirally arranged inside the electromagnetic induction coil, and a cooling fluid is passed through the electromagnetic induction coil.

[0009] Preferably, the heat exchange pipe is in a square structure and is arranged in the closed shell in a waist-shaped circulation manner.

[0010] Preferably, the heat exchange pipeline includes a heat exchange straight pipe and a heat exchange bent pipe, and the heat exchange straight pipe and the heat exchange bent pipe are connected.

[0011] Preferably, a plurality of electromagnetic heating components are provided, and the plurality of electromagnetic heating components are arranged at equal intervals on the inner side of the heat exchange pipe component.

[0012] Preferably, the heat exchange pipe is annular and spirally arranged in the closed shell.

[0013] Preferably, the heat exchange pipe is a heat exchange pipe with a spiral structure.

[0014] Preferably, the electromagnetic heating component is provided with one, and the electromagnetic heating component is arranged on the inner side of the heat exchange pipe component.

[0015] A method for using an electromagnetic heater with a built-in electromagnetic induction coil comprises the following steps: A: When in use, the fluid to be heated is passed into the heat exchange pipe assembly, and the high-frequency AC power supply is connected to the electromagnetic heating assembly. An alternating magnetic field is generated around the electromagnetic heating assembly, and the heat exchange pipe assembly in the alternating magnetic field generates induced eddy currents to generate heat, thereby causing the heat exchange pipe assembly to heat the fluid to be heated; B: During the electromagnetic heating process, a cooling fluid is introduced into the electromagnetic heating component, and the cooling fluid cools the electromagnetic heating component.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a heat exchange pipe assembly and an electromagnetic heating assembly. The electromagnetic heating assembly is arranged on the inner side of the heat exchange pipe assembly and is arranged in a built-in electromagnetic induction coil manner. Electromagnetic induction heating is used instead of traditional resistance heating to avoid heat loss and potential nitrogen hazards caused by filling nitrogen. Pollutants such as smoke and exhaust gas are not generated, which is more environmentally friendly and hygienic, and the heating efficiency is improved, the heating speed is accelerated, and the temperature control accuracy is improved. 2. The present invention adopts a heat exchange pipe with spiral guide strips to replace the traditional light pipe structure, which has stronger heat exchange performance, can prevent and remove scale autonomously, and self-compensate for temperature stress. While saving resources, it reduces manufacturing costs, the risk of damage caused by temperature stress, and the difficulty of maintenance and cleaning caused by dirt after being put into use. It also increases the heat exchange efficiency while also using a faster flow rate to increase the anti-scaling and descaling ability of the pipeline; 3. The present invention adopts an electromagnetic induction coil with a coil guide strip, and is arranged in a spiral manner to destroy the laminar boundary layer of the inner tube of the electromagnetic induction coil, so that the flow of the cooling liquid reaches sufficient turbulence, has autonomous anti-scaling and cleaning, self-compensation for temperature stress, and reduces the loss of the electromagnetic induction coil; 4. The electromagnetic induction coil of the present invention adopts a coil guide strip with an inner spiral structure and adopts a built-in cooling fluid heat dissipation method to enhance the heat dissipation capacity of the electromagnetic induction coil and increase the service life of the electromagnetic induction coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a side cross-sectional structure of an electromagnetic heater of the present invention; Figure 2 It is a schematic diagram of a top view and a cross-sectional structure of an electromagnetic heater of the present invention; Figure 3 It is a schematic diagram of the main cross-sectional structure of the electromagnetic heater of the present invention; Figure 4 It is a structural schematic diagram of the electromagnetic heating assembly of the present invention; Figure 5 It is a schematic cross-sectional structural diagram of the heat exchange pipe of the present invention; Figure 6 It is a schematic cross-sectional structural diagram of the heat exchange pipe of the present invention; Figure 7 It is a schematic cross-sectional structural diagram of the heat exchange pipe of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the electromagnetic induction coil of the present invention; Fig. 9It is a schematic diagram of a side cross-sectional structure of an electromagnetic heater of the present invention; Fig.10 It is a schematic diagram of the front and cross-sectional structure of the electromagnetic heater of the present invention.

[0018] In the figure: 1. closed shell; 2. heat exchange pipe assembly; 201. heat exchange pipe; 2011. heat exchange straight pipe; 2012. heat exchange bent pipe; 202. spiral guide strip; 3. electromagnetic heating assembly; 301. electromagnetic induction coil; 302. insulating column; 303. coil guide strip; 4. thermal insulation layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In this embodiment, Figure 1-Figure 8 As shown, the electromagnetic heater with a built-in electromagnetic induction coil provided by the present invention comprises: A closed shell 1, which is used for insulating and enclosing the electromagnetic induction line; The heat exchange pipe assembly 2 is arranged in the closed shell 1. The heat exchange pipe assembly 2 is wrapped with a heat insulation layer 4 on the outside. The heat exchange pipe assembly 2 includes a heat exchange pipe 201 and spiral guide strips 202 arranged in the heat exchange pipe 201 at equal intervals. The heat exchange pipe 201 is a square structure and is arranged in the closed shell 1 in a waist-shaped circulation manner. The heat exchange pipe 201 includes a heat exchange straight pipe 2011 and a heat exchange elbow 2012. The heat exchange straight pipe 2011 and the heat exchange elbow 2012 are connected; The electromagnetic heating component 3 is arranged in the closed shell 1, and the electromagnetic heating component 3 is arranged on the inner side of the heat exchange pipe component 2. A plurality of electromagnetic heating components 3 are arranged, and the plurality of electromagnetic heating components 3 are arranged at equal intervals on the inner side of the heat exchange pipe component 2. The electromagnetic heating component 3 includes an electromagnetic induction coil 301 and an insulating column 302. The electromagnetic induction coil 301 is spirally wound on the insulating column 302. The electromagnetic induction coil 301 is spirally arranged with coil guide strips 303 at equal intervals. A cooling fluid is passed into the electromagnetic induction coil 301.

[0021] In this embodiment, Figure 4-Figure 10 As shown, the electromagnetic heater with a built-in electromagnetic induction coil provided by the present invention comprises: A closed shell 1, which is used for insulating and enclosing the electromagnetic induction line; The heat exchange pipe assembly 2 is arranged in the closed shell 1. The heat exchange pipe assembly 2 is wrapped with a heat insulation layer 4 on the outside. The heat exchange pipe assembly 2 includes a heat exchange pipe 201 and spiral guide strips 202 arranged in the heat exchange pipe 201 at equal intervals. The heat exchange pipe 201 is annular and arranged in the closed shell 1 in a spiral manner. The heat exchange pipe 201 is a heat exchange pipe with a spiral structure. The electromagnetic heating component 3 is arranged in the closed shell 1, and the electromagnetic heating component 3 is arranged on the inner side of the heat exchange pipe component 2. The electromagnetic heating component 3 is provided with one, and one electromagnetic heating component 3 is arranged on the inner side of the heat exchange pipe component 2. The electromagnetic heating component 3 includes an electromagnetic induction coil 301 and an insulating column 302. The electromagnetic induction coil 301 is spirally wound on the insulating column 302. The electromagnetic induction coil 301 is spirally provided with coil guide strips 303 with equal spacing. A cooling fluid is passed into the electromagnetic induction coil 301.

[0022] The present invention is provided with a heat exchange pipe assembly 2 and an electromagnetic heating assembly 3. The electromagnetic heating assembly 3 is arranged on the inner side of the heat exchange pipe assembly 2 and is arranged in a built-in electromagnetic induction coil manner. The electromagnetic induction heating is used to replace the traditional resistance heating, thereby avoiding heat loss and potential nitrogen hazards caused by filling nitrogen, and does not generate pollutants such as smoke and exhaust gas. It is more environmentally friendly and hygienic, and improves the heating efficiency, accelerates the heating speed, and improves the temperature control accuracy. The present invention adopts a heat exchange pipe 201 with a spiral guide strip 202 to replace the traditional light pipe structure, which has a stronger heat exchange performance, can prevent and remove scales autonomously, and can self-compensate for temperature stress, thereby saving resources, reducing manufacturing costs, the risk of damage caused by temperature stress, and the difficulty of maintenance and cleaning caused by dirt after being put into use, and increasing the heat exchange efficiency while also using a faster flow rate to increase the anti-scaling and descaling capabilities of the pipe; The present invention adopts an electromagnetic induction coil 301 with a coil guide bar 303, and arranges it in a spiral manner, destroying the laminar boundary layer of the inner tube of the electromagnetic induction coil 301, so that the flow of the cooling liquid reaches sufficient turbulence, has autonomous anti-scaling and cleaning, self-compensation for temperature stress, and reduces the loss of the electromagnetic induction coil 301; The electromagnetic induction coil 301 of the present invention adopts the coil guide bar 303 with an inner spiral structure and adopts a built-in cooling fluid heat dissipation method to enhance the heat dissipation capacity of the electromagnetic induction coil 301 and increase the service life of the electromagnetic induction coil 301.

[0023] The method for using the electromagnetic heater with a built-in electromagnetic induction coil provided by the present invention comprises the following steps: A: When in use, the fluid to be heated is passed into the heat exchange pipe assembly 2, and the high-frequency AC power supply is connected to the electromagnetic heating assembly 3, and an alternating magnetic field is generated around the electromagnetic heating assembly 3. The heat exchange pipe assembly 2 in the alternating magnetic field generates induced eddy currents to generate heat, thereby causing the heat exchange pipe assembly 2 to heat the fluid to be heated; B: During the electromagnetic heating process, the cooling fluid is introduced into the electromagnetic heating component 3, and the cooling fluid cools the electromagnetic heating component 3.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic heater with a built-in electromagnetic induction coil, characterized in that: include: A closed shell (1), the closed shell (1) being used for insulating and enclosing an electromagnetic induction line; A heat exchange pipe assembly (2), wherein the heat exchange pipe assembly (2) is arranged in the closed shell (1); An electromagnetic heating component (3), wherein the electromagnetic heating component (3) is arranged in the closed shell (1), and the electromagnetic heating component (3) is arranged on the inner side of the heat exchange pipe component (2).

2. The electromagnetic heater with a built-in electromagnetic induction coil according to claim 1, characterized in that: The heat exchange pipe assembly (2) is wrapped with a heat insulation layer (4) on the outside, and the heat exchange pipe assembly (2) comprises a heat exchange pipe (201) and spiral guide strips (202) arranged at equal intervals in the heat exchange pipe (201).

3. The electromagnetic heater with a built-in electromagnetic induction coil according to claim 1, characterized in that: The electromagnetic heating assembly (3) comprises an electromagnetic induction coil (301) and an insulating column (302); the electromagnetic induction coil (301) is spirally wound on the insulating column (302); coil guide bars (303) with equal spacing are spirally arranged inside the electromagnetic induction coil (301); and a cooling fluid is passed into the electromagnetic induction coil (301).

4. The electromagnetic heater with a built-in electromagnetic induction coil according to claim 2, characterized in that: The heat exchange pipe (201) is in a square structure and is arranged in a waist-shaped circulation manner in the closed shell (1).

5. The electromagnetic heater with a built-in electromagnetic induction coil according to claim 4, characterized in that: The heat exchange pipeline (201) comprises a heat exchange straight pipe (2011) and a heat exchange bent pipe (2012), and the heat exchange straight pipe (2011) and the heat exchange bent pipe (2012) are connected.

6. The electromagnetic heater with a built-in electromagnetic induction coil according to claim 3, characterized in that: A plurality of the electromagnetic heating components (3) are provided, and the plurality of the electromagnetic heating components (3) are arranged at equal intervals on the inner side of the heat exchange pipe component (2).

7. The electromagnetic heater with a built-in electromagnetic induction coil according to claim 2, characterized in that: The heat exchange pipe (201) is arranged in a ring-shaped spiral structure inside the closed shell (1).

8. The electromagnetic heater with a built-in electromagnetic induction coil according to claim 7, characterized in that: The heat exchange pipe (201) is a heat exchange pipe with a spiral structure.

9. The electromagnetic heater with a built-in electromagnetic induction coil according to claim 3, characterized in that: The electromagnetic heating component (3) is provided with one, and the electromagnetic heating component (3) is arranged on the inner side of the heat exchange pipe component (2).

10. The method for using the electromagnetic heater with a built-in electromagnetic induction coil according to any one of claims 1 to 9, characterized in that: The steps include: A: When in use, the fluid to be heated is passed into the heat exchange pipe assembly (2), and a high-frequency alternating current power source is connected to the electromagnetic heating assembly (3). An alternating magnetic field is generated around the electromagnetic heating assembly (3), and the heat exchange pipe assembly (2) in the alternating magnetic field generates induced eddy currents to generate heat, thereby causing the heat exchange pipe assembly (2) to heat the fluid to be heated; B: During the electromagnetic heating process, a cooling fluid is introduced into the electromagnetic heating component (3), and the cooling fluid cools the electromagnetic heating component (3).

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