CN111601412A - Cage type magnetic shielding electromagnetic induction heating device - Google Patents

Cage type magnetic shielding electromagnetic induction heating device Download PDF

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Publication number
CN111601412A
CN111601412A CN202010593998.6A CN202010593998A CN111601412A CN 111601412 A CN111601412 A CN 111601412A CN 202010593998 A CN202010593998 A CN 202010593998A CN 111601412 A CN111601412 A CN 111601412A
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CN
China
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magnetic field
electromagnetic induction
induction heating
alternating magnetic
magnetic
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CN202010593998.6A
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Inventor
乔志洪
王梅千
周年春
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Hunan Qianhao Electrical And Mechanical Technology Development Co ltd
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Hunan Qianhao Electrical And Mechanical Technology Development Co ltd
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Priority to CN202010593998.6A priority Critical patent/CN111601412A/en
Publication of CN111601412A publication Critical patent/CN111601412A/en
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/36Coil arrangements

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

A cage type magnetically shielded electromagnetic induction heating apparatus comprising: a thermal insulation and a semi-alternating magnetic field source; wherein the source of the semi-alternating magnetic field comprises: an alternating magnetic field generating unit and a skeleton; the alternating magnetic field generating unit consists of an E-shaped magnetic core and a coil arranged on the E-shaped magnetic core, and the invention adopts an electromagnetic induction heating mode, saves electricity by at least more than 35 percent compared with the currently adopted electric heating coil, is convenient to install, improves the heat efficiency and the heat preservation effect, ensures that the working environment is moderate and comfortable, has no electromagnetic pollution to the surrounding environment, and is green and environment-friendly.

Description

Cage type magnetic shielding electromagnetic induction heating device
Technical Field
The invention relates to the technical field of fluid heating in a conductor pipeline, plastic heating in a metal charging barrel or heating and smelting of a low-melting-point conductive material, in particular to a cage type magnetic shielding electromagnetic induction heating device.
Background
At present, in alpine regions, the outdoor steel pipe oil pipeline, especially the thick oil transportation, is often blocked due to freezing even though a thermal insulation layer is coated outside the pipeline. In the industries of plastics and the like, due to the requirement of an injection molding or extrusion molding process, plastic raw materials are required to be heated from low temperature to high temperature meeting the requirement of the injection molding or extrusion molding process within the limited length of a steel charging barrel to be injected from a tail end nozzle. The current common technical method is to adopt heating resistance wires to wrap and heat or adopt ceramic infrared tubes to wrap and heat. The technologies and the methods have the defects that some technologies and the methods have high energy consumption, some have potential safety hazards, some control precision of the temperature cannot meet the process requirement, and some technologies and the methods cause the environmental temperature to be greatly increased and are not environment-friendly. Of course, electromagnetic induction heating is available at present, but because the technical limit still has electromagnetic leakage to influence the normal operation of equipment in the surrounding environment, or cause physical damage to people, or because the cost is high, the industrial practical application is very little.
Disclosure of Invention
The invention aims to provide a cage type magnetic shielding electromagnetic induction heating device, which comprises: the semi-alternating magnetic field source is arranged outside the heat insulation piece;
wherein the source of the semi-alternating magnetic field comprises: the device comprises an alternating magnetic field generating unit for generating an alternating magnetic field by electrifying and a framework for mounting the alternating magnetic field generating unit; the alternating magnetic field generating unit consists of an E-shaped magnetic core and a coil arranged on the E-shaped magnetic core.
In one embodiment, the alternating magnetic field generating unit is embedded in the inner side of the framework, and the alternating magnetic field generating unit is provided with a plurality of circles which are uniformly distributed in a radial shape for 360 degrees.
In one embodiment, an E-shaped magnetic core comprises: a middle magnetic pole, a side magnetic pole and a magnetic yoke; the coil is wound on the periphery of the middle magnetic pole, and the coil is partially embedded between the middle magnetic pole and the side magnetic pole and positioned on the inner side of the magnetic yoke.
In one embodiment, the coil is wound on the periphery of the middle magnetic pole, is partially embedded between the middle magnetic pole and the side magnetic pole and is positioned inside the magnetic yoke.
In one embodiment, the alternating magnetic field generating unit is provided with a power frequency, intermediate frequency, high frequency and ultrahigh frequency alternating power supply, and generates corresponding power frequency, intermediate frequency, high frequency and ultrahigh frequency alternating magnetic field sources.
In one embodiment, the framework is a semi-annular cylindrical structure, and two semi-annular cylindrical structures form a whole-ring closed framework; the alternating magnetic field generating unit is embedded in the inner side of the framework, and the alternating magnetic field generating unit is radially and uniformly distributed for 360 degrees of circumference to form a cage type magnetic shielding.
In one embodiment, a mounting component for fixedly connecting the two semi-annular cylindrical frameworks is further arranged at the connecting position of the closed frameworks.
In one embodiment, the E-shaped magnetic core comprises a middle magnetic pole, a side magnetic pole and a magnetic yoke which are integrated, and the E-shaped magnetic core is made of high-resistance high-permeability materials.
In one embodiment, the thermal insulation member comprises: the coil comprises a heat insulation layer arranged outside the metal charging barrel in a wrapping mode and a plate-shaped heat insulation block arranged outside the heat insulation layer, wherein the plate-shaped heat insulation block is arranged between adjacent E-shaped magnetic cores and on the inner side of the coil, and therefore the coil is protected more effectively.
In one embodiment, the heating device wraps the metal charging barrel arranged on the injection molding machine or the extrusion molding machine, and can heat the plastic in the charging barrel instead of the existing resistance wire heating or infrared tube heating; the heating device is wrapped outside the metal pipeline for conveying the fluid, so that the fluid substances in the pipeline can be heated; the heating device is wrapped on the outer surface of the crucible, so that the conductive material in the crucible can be heated and melted.
The invention has the following beneficial effects:
the invention adopts the non-heat source induction heating technology of power frequency, intermediate frequency, high frequency and ultrahigh frequency according to the provided alternating power supply frequency; the medium and high frequency electromagnetic induction heating has high speed and efficiency, no high temperature in the environment and no electricity leakage, and is the safest explosion-proof electric heating mode; meanwhile, the frequency range specified by the State environmental protection Bureau is adopted, so the frequency range is harmless to human bodies.
According to the alternating power supply frequency, the invention adopts a power frequency, medium frequency, high frequency and ultrahigh frequency electromagnetic induction heating mode, two groups of frameworks fixedly connected by the assembly component are matched with a semi-alternating magnetic field source embedded on the frameworks to wrap the outer surface of the metal charging barrel, the metal charging barrel generates eddy current in an alternating magnetic field to generate heat and directly conduct the heat to the material to be heated in the charging barrel, and the induction heating device does not generate heat per se, thereby having good electricity-saving effect and long service life. Compared with the currently adopted electric heating coil, the electricity is saved by at least more than 40%.
The cage type magnetic shielding electromagnetic induction heating device has high power efficiency: if the invention is used for heating materials for plastic pressure molding processing, the single induction heating device can replace the original 2-3 electric heating rings. The cage type magnetic shielding electromagnetic induction heating device is low in use cost, saves electric energy and is small in maintenance amount.
The invention adopts the creative alternating magnetic field generating unit embedded inside the annular cylindrical structure framework, and the alternating magnetic field generating unit is radially and uniformly distributed for 360 degrees of circumference to form the cage type magnetic shielding.
The cage type magnetic shielding electromagnetic induction heating device has no electromagnetic pollution to the surrounding environment, is environment-friendly, thoroughly solves the problems of large magnetic leakage and environmental pollution in the existing induction heating technology, and is efficient and energy-saving.
The cage type magnetic shielding electromagnetic induction heating device effectively solves the problems of high energy consumption, low efficiency, potential safety hazard, high environmental temperature, electromagnetic leakage which affects the normal operation of equipment in the surrounding environment or causes physical damage to people and the like in the prior art, and effectively reduces the manufacturing cost. Therefore, the device has the advantages of high efficiency, energy conservation, low use cost, less maintenance amount, long service life, moderate and comfortable working environment temperature, little external electromagnetic leakage, no electromagnetic pollution to the surrounding environment and environmental protection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of the present invention in operation;
FIG. 2 is a schematic view of an embodiment of the assembly and thermal insulation of the present invention;
FIG. 3 is a schematic cross-sectional view of a source of a semi-alternating magnetic field;
FIG. 4 is a schematic diagram of a half-section structure of the alternating magnetic field generating unit during operation;
FIG. 5 is a schematic structural diagram of an alternating magnetic field generating unit;
FIG. 6 is a schematic diagram of an E-shaped core structure according to the present invention;
FIG. 7 is a schematic diagram showing the distribution of the magnetic circuits of the instant operation of the unit composed of the alternating magnetic field generating unit and the metal charging barrel according to the present invention;
fig. 8 is a schematic diagram of a specific arrangement of a framework according to one embodiment of the present invention.
Detailed Description
It should be noted that all the directional indications (such as up, down, left, right, front, back, inner and outer, center … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
Referring to fig. 1 and 3, a cage type magnetic shielding electromagnetic induction heating apparatus includes: a heat insulation piece 20 coated outside the metal charging barrel and a semi-alternating magnetic field source 1 arranged outside the heat insulation piece 20;
wherein, half alternating magnetic field source 1 includes: an alternating magnetic field generating unit 11 for generating an alternating magnetic field by energization and a framework 12 for mounting the alternating magnetic field generating unit 11; the alternating magnetic field generating unit 11 is composed of an E-shaped core 111 and a coil 112 provided on the E-shaped core 111.
Preferably, the alternating magnetic field generating unit 11 is embedded inside the framework 12, the alternating magnetic field generating unit 11 is provided with a plurality of cage-type magnetic shielding bodies which are radially and uniformly distributed for 360 degrees, alternating current is provided for the alternating magnetic field generating unit 11, and eddy current is generated in the metal charging barrel to perform induction heating on the metal charging barrel, so that materials in the metal charging barrel are heated.
Preferably, the present invention further comprises a temperature control unit (not shown) for precisely controlling the heating temperature of the material in the metal charging barrel.
Referring to fig. 4 to 6, preferably, the alternating magnetic field generating unit 11 includes: an E-shaped core 111 and a coil 112. The E-shaped core 111 includes a center pole 111a, a side pole 111b, and a yoke 111 c.
The coil 112 is wound around the outer circumference of the middle magnetic pole 111a, and the coil 112 is partially embedded between the middle magnetic pole 111a and the side magnetic pole 111b and is located inside the magnetic yoke 111 c.
The E-shaped magnetic core 111 is made of a high-resistance high-permeability material. The middle pole 111a and the side pole 111b are teeth protruding from the inside of the yoke 111 c.
The magnetic flux passing through the middle magnetic pole 111a is shunted to the two magnetic poles 111b through the magnetic yoke 111c and guided to the surface layer of the metal charging barrel to be ideally balanced by arranging the magnetic flux passing sections of the middle magnetic pole 111a, the two magnetic poles 111b and the magnetic yoke 111c of the E-shaped magnetic core 111 to be matched; the E-shaped magnetic core 111 surrounds the periphery of the metal charging barrel in a radial and uniform distribution for 360 degrees to form a perfect cage type magnetic shielding, and blocks the alternating magnetic field generated by the alternating magnetic field generating unit 11 from radiating to the external space to achieve ideal shielding. Realizing the concept of environmental protection. The magnetic efficiency is improved to the maximum extent, and ideal energy conservation is achieved.
The E-shaped magnetic core 111 with high resistance and high magnetic permeability and uniformly distributed in a radiation mode is arranged around the metal charging barrel, so that the metal charging barrel becomes an effective barrier for preventing the alternating magnetic field from radiating to the outside non-working environment and leaking, an excellent cage type magnetic shielding is formed, and eddy current heating loss is low.
Referring to fig. 7, an alternating current is supplied to the alternating magnetic field generating unit 11, the coil 112 has an alternating current flowing through, an alternating magnetic field is generated in the middle magnetic pole 111a of the E-shaped magnetic core 111 due to electromagnetic induction, and the magnetic flux of the alternating magnetic field is shunted from the middle magnetic pole 111a of the E-shaped magnetic core 111 to the metal material cylinder layer (magnetic conductive and conductive material) through the air gap heat insulating member 20, then enters the two magnetic poles 111b through the air gap heat insulating layer 3, and then enters the middle magnetic pole 111a through the magnetic yoke 111c, thereby forming a butterfly-shaped two-magnetic closed loop.
The alternating magnetic field generates countless small eddy currents in the metal charging barrel due to electromagnetic induction, so that the metal charging barrel automatically generates heat due to the induced eddy currents, and then the liquid or solid non-conductive materials in the charging barrel are heated by the heat conducted by the metal charging barrel. When the metal charging barrel is heated, the electromagnetic induction heating device does not generate heat, so the electromagnetic heat efficiency is high, and the energy conservation is remarkable. In addition, in the electromagnetic induction heating, the magnetic gathering pole is added, the same heat energy is obtained in the same metal heated body in unit time, the required excitation electric power is reduced by about 25%, the electric power loss of the electromagnetic coil 112 is reduced by about 90%, and the self eddy current heat loss of the alternating magnetic field generating unit 11 taking the E-shaped magnetic core 111 made of high-resistance high-permeability material as the core and the induction heating unit composed of the same is extremely small.
Preferably, the alternating magnetic field generating unit 11 is provided with a power frequency, intermediate frequency, high frequency and ultrahigh frequency alternating power supply, and the alternating magnetic field generating unit 11 generates corresponding power frequency, intermediate frequency, high frequency and ultrahigh frequency alternating magnetic field sources. Because the E-shaped magnetic core 111 is made of a high-resistance high-permeability material, the self-induced eddy current loss or hysteresis loss of the alternating magnetic field generating unit 11 is extremely small no matter at power frequency, medium frequency, high frequency or ultrahigh frequency, i.e., the cage type magnetic shielding electromagnetic induction heating device of the invention has extremely high electromagnetic thermal efficiency and extremely remarkable energy saving.
Referring to fig. 2, the heat insulator 20 includes: the coil 112 is more effectively protected by covering the heat insulating layer 3 provided outside the metal cylinder and the plate-like heat insulating block 2 provided outside the heat insulating layer 3, and the plate-like heat insulating block 2 is provided between the adjacent E-shaped magnetic cores 111 and inside the coil 112.
Preferably, the electromagnetic induction heating device is wrapped on the outer surface of a metal charging barrel of the injection molding machine or the plastic extruding machine, and can replace the existing resistance wire heating or infrared tube heating to heat the plastic in the charging barrel; the heating device is wrapped outside the metal pipeline for conveying the fluid, so that the fluid substances in the pipeline can be heated; the heating device is wrapped on the outer surface of the crucible, so that the conductive material in the crucible can be heated and melted.
Example 2
Referring to fig. 1, fig. 2 and fig. 8, the difference from the above embodiment is that the frame 12 is a semi-ring cylindrical structure, and two semi-ring cylindrical structure frames 121 form a whole ring closed frame 12; alternating magnetic field generating unit 11 is embedded inside framework 12, and alternating magnetic field generating unit 11 is radially and uniformly distributed for 360 degrees of circumference to become cage type magnetic shielding.
An assembly component 30 for fixedly connecting the closed framework 12 formed by the two semi-annular cylindrical frameworks 121 is also arranged at the connecting position of the closed framework 12, and the assembly component 30 can be a structure for fixedly assembling any part which is arranged in a split mode, such as a nut matched screw rod and/or a flange.
Still more preferably, the fitting assembly 30 is composed of a hinge 4 and a latch 5, the hinge 4 is provided at one joint of the closed frames 12 formed by the two half-ring cylindrical structural frames 121, and the latch 5 is provided at the other joint of the closed frames 12 formed by the two half-ring cylindrical structural frames 121. The hinge 4 is connected with an electromagnetic induction heating device consisting of two groups of semi-alternating magnetic field sources 1 and is fastened by a lock 5. The installation steps are simplified by the provision of the hinge 4 and the latch 5, so that the installation and maintenance process is simplified.
The hinge 4 is connected with the two groups of semi-alternating magnetic field sources 1 to form an electromagnetic induction heating device; the metal charging barrel is wrapped by the heat insulation layer 3, the heat insulation layer 3 is encircled by the induction heating unit, and the metal charging barrel is encircled by the electromagnetic induction heating device.
The invention adopts the structure that two groups of semi-alternating magnetic field sources 1 connected by hinges 4 are an electromagnetic induction heating device, is convenient to install, and adds a heat insulation layer 3 between the pipeline and the heating unit, thereby better improving the heat efficiency and the heat insulation effect and ensuring that the temperature of the working environment is moderate and comfortable.
As shown in fig. 6, when the electromagnetic induction heating device is operated, the polarities of any two adjacent poles (the side magnetic pole 111b and the side magnetic pole 111b, the side magnetic pole 111b and the middle magnetic pole 111a, and the middle magnetic pole 111a) in the same electromagnetic induction heating device are different, the magnetic convergence of the magnetic poles and the magnetic yoke 111c enables the alternating magnetic field generated by the alternating magnetic field generating unit 11 to be shunted by the magnetic yoke 111c, the magnetic poles converge and guide, and the high-density alternating magnetic field is transmitted to the metal charging barrel, and the internal magnetic circuit is extremely short and is always. There are studies showing that: in the electromagnetic induction heating, the magnetic core with high magnetic permeability is increased to gather magnetism, the same metal heated body can obtain the same heat energy in unit time, the required excitation electric power is reduced by about 25%, and the loss electric power of the alternating magnetic field generating unit 11 is reduced by about 90%. Therefore, the cage type magnetic shielding electromagnetic induction heating device is high in efficiency and extremely remarkable in energy-saving effect.
According to the embodiment, further extension is performed, the closed framework 12 can be further configured to be composed of a plurality of framework modules (not shown) connected through the assembly component 30, and the purposes of convenient transportation and flexible installation can be achieved only by configuring the assembly component 30 between any adjacent framework modules as a movable locking mechanism.
Furthermore, the assembly components 30 for connecting the framework modules are all provided with movable locking mechanisms, so that the size of the finally formed closed framework 12 can be flexibly adjusted according to application scenes.
Therefore, the invention can exert the optimal magnetic efficiency and thermal efficiency and achieve the optimal energy-saving effect, namely, high efficiency and energy saving; has accurate heating depth and heating area, and the temperature is easy to control. The electromagnetic induction heating device is structurally arranged by adopting the electromagnetic induction heating device consisting of the two semi-alternating magnetic field sources 1 connected by the hinge 4, so that the installation and maintenance are more concise and convenient. When the metal charging barrel is heated, the electromagnetic induction heating device does not generate heat, and the plate-shaped heat insulation block 2 protects the coil 112 again, so that the cage type magnetic shielding electromagnetic induction heating device has longer service life.
The working principle of the invention is as follows:
the invention relates to an energy conversion device for converting electric energy into heat energy by utilizing an electromagnetic induction principle and a Joule law, when alternating current passes through a coil 112, an alternating magnetic field is generated due to electromagnetic induction, the alternating magnetic field in the coil 112 is guided to permeate a heat insulation layer 3 to a metal charging barrel layer (magnetic conductive and conductive material) through magnetism gathering of a middle magnetic pole 111a of an E-shaped magnetic core 111, countless small eddy currents are generated in the metal charging barrel, so that the metal charging barrel self generates heat due to induced high-frequency eddy currents, and then the heat is conducted through the metal charging barrel to finish heating of liquid or solid non-conductive materials in the charging barrel.
The principles of the present invention derive from the following basic recognition: the current flowing through the conductor has a thermal effect; joule's law; the ferromagnetic substance has a thermal effect caused by hysteresis loss under the alternating magnetic flux; air is a conductor to magnetism and does not saturate; the static magnetic field B has no influence on the heated body; the magnetic permeability of the magnetic material is far greater than that of air, and is thousands of times or even tens of thousands of times; the magnetic material can gather and concentrate the magnetic flux generated in the coil 112 for conduction and also can focus and conduct, thereby reducing the magnetic field divergence, improving the energy density, reducing the influence of magnetic flux leakage and generating magnetic shielding; the magnetic induction intensity, the magnetic intensity rate and the magnetic efficiency in the induction space can be improved by the magnetic material.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A cage type magnetic shielding electromagnetic induction heating device is characterized by comprising: the semi-alternating magnetic field source is arranged outside the heat insulation piece;
wherein the source of the semi-alternating magnetic field comprises: the device comprises an alternating magnetic field generating unit for generating an alternating magnetic field by electrifying and a framework for mounting the alternating magnetic field generating unit; the alternating magnetic field generating unit consists of an E-shaped magnetic core and a coil arranged on the E-shaped magnetic core.
2. The cage type magnetic shielding electromagnetic induction heating device according to claim 1, wherein the alternating magnetic field generating unit is embedded inside the framework, and the alternating magnetic field generating unit is provided with a plurality of circles which are radially and uniformly distributed for 360 degrees.
3. The cage type magnetically shielded electromagnetic induction heating apparatus as claimed in claim 1, wherein said E-shaped magnetic core comprises: a middle magnetic pole, a side magnetic pole and a magnetic yoke; the coil is wound on the periphery of the middle magnetic pole, and the coil is partially embedded between the middle magnetic pole and the side magnetic pole and is positioned on the inner side of the magnetic yoke.
4. A cage-type magnetically shielded electromagnetic induction heating apparatus as claimed in claim 3, wherein said coil is wound around the periphery of said middle pole, partially embedded between said middle pole and said side poles and inside the yoke.
5. The cage-type magnetically shielded electromagnetic induction heating apparatus as claimed in claim 1, wherein said alternating magnetic field generating unit is supplied with power frequency, medium frequency, high frequency and ultra high frequency alternating power supplies, and generates corresponding power frequency, medium frequency, high frequency and ultra high frequency alternating magnetic field sources.
6. The cage type magnetic shielding electromagnetic induction heating device according to any one of claims 1 to 5, wherein the framework is a semi-ring cylindrical structure, and two semi-ring cylindrical structures form a whole ring closed framework; the alternating magnetic field generating unit is embedded inside the framework, and the alternating magnetic field generating unit is radially and uniformly distributed for 360 degrees of circumference to form a cage type magnetic shielding.
7. A cage type magnetically shielded electromagnetic induction heating apparatus as claimed in claim 6, wherein a fitting assembly for fixedly connecting the two half-ring cylindrical structures is further provided at the junction of the closed frames.
8. A cage type magnetic shielding electromagnetic induction heating device according to any one of claims 1 to 4, characterized in that said E-shaped magnetic core comprises a middle magnetic pole, a side magnetic pole and a magnetic yoke in one body, and said E-shaped magnetic core is made of high-resistance high-permeability material.
9. A cage type magnetically shielded electromagnetic induction heating apparatus as claimed in any one of claims 1 to 4 wherein said thermal shield comprises: the coil comprises a heat insulation layer arranged outside the metal charging barrel in a wrapping mode and a plate-shaped heat insulation block arranged outside the heat insulation layer, wherein the plate-shaped heat insulation block is arranged between adjacent E-shaped magnetic cores and on the inner side of the coil, and the coil is protected more effectively.
10. The cage type magnetic shielding electromagnetic induction heating device according to any one of claims 1 to 9, wherein the heating device is wrapped on the outer surface of a metal charging barrel of an injection molding machine or an extrusion molding machine, and can be used for heating plastics in the charging barrel instead of the conventional resistance wire heating or infrared tube heating; the heating device is wrapped outside the metal pipeline for conveying the fluid, so that the fluid substances in the pipeline can be heated; the heating device is wrapped on the outer surface of the crucible, so that the conductive material in the crucible can be heated and melted.
CN202010593998.6A 2020-06-24 2020-06-24 Cage type magnetic shielding electromagnetic induction heating device Pending CN111601412A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112362523A (en) * 2020-10-27 2021-02-12 合肥工业大学 Energy utilization rate evaluation method of induction heating functional pavement based on ice melting test
CN113163535A (en) * 2021-04-23 2021-07-23 深圳市碧源达科技有限公司 Narrow-side line electromagnetic induction heating device and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005100935A (en) * 2003-08-25 2005-04-14 Tokyo Denki Univ Pipe induction heating device
CN105072728A (en) * 2015-08-07 2015-11-18 湖南千豪机电技术开发有限公司 Magnetic shielding tube-type electromagnetic induction heating device
CN212876147U (en) * 2020-06-24 2021-04-02 湖南千豪机电技术开发有限公司 Cage type magnetic shielding electromagnetic induction heating device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005100935A (en) * 2003-08-25 2005-04-14 Tokyo Denki Univ Pipe induction heating device
CN105072728A (en) * 2015-08-07 2015-11-18 湖南千豪机电技术开发有限公司 Magnetic shielding tube-type electromagnetic induction heating device
CN212876147U (en) * 2020-06-24 2021-04-02 湖南千豪机电技术开发有限公司 Cage type magnetic shielding electromagnetic induction heating device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112362523A (en) * 2020-10-27 2021-02-12 合肥工业大学 Energy utilization rate evaluation method of induction heating functional pavement based on ice melting test
CN112362523B (en) * 2020-10-27 2022-12-09 合肥工业大学 Energy utilization rate evaluation method of induction heating functional pavement based on ice melting test
CN113163535A (en) * 2021-04-23 2021-07-23 深圳市碧源达科技有限公司 Narrow-side line electromagnetic induction heating device and method

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