CN104185325B - Induction heating equipment - Google Patents
Induction heating equipment Download PDFInfo
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- CN104185325B CN104185325B CN201410204739.4A CN201410204739A CN104185325B CN 104185325 B CN104185325 B CN 104185325B CN 201410204739 A CN201410204739 A CN 201410204739A CN 104185325 B CN104185325 B CN 104185325B
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Abstract
The invention provides and a kind ofly can reduce the replacing man-hour of parts and the induction heating equipment of cost.This induction heating equipment possesses: load coil (1), and it utilizes the electric power come from induction heating power (4) supply to be configured in heated object (6) induction heating the gap (1a) of pars intermedia; Ancillary coil (2), its axle is parallel with the axle of described heater coil, and to be configured in the mode producing magnetic flux in the other direction with heater coil.
Description
Technical field
The present invention relates to a kind of by the induction heating equipment of metal tube soldered joint each other.
Background technology
In metal tube connection each other, soldering is carried out for the heat exchanger in air-conditioning etc.As the method for carrying out this soldering, propose the method used as the induction heating described in patent documentation 1.Fig. 9 shows the state of the induction heating of heat exchanger in patent documentation 1.
Heat exchanger comprises: with multiple plate wings 7 be made up of aluminium etc. of parallel shape configuration; On the iron plate 8 of the protection of plate wing 7 and outside border and plate wing 7 configured in parallel; The many velamens be made up of copper etc. configured to run through these plate wings 7 and the mode of iron plate 8 are in a thickness direction called the metal tube of pipe 6a; The many velamens connecting U-shaped between described many pipe 6a or other shape are called the metal tube of metal junction block 6b.Now, pipe 6a is engaged with junction block 6b, make cold-producing medium at pipe 6a Inner eycle.This joint method mainly uses soldering.
In being bent to form with falling U-shaped when heater coil 1 is to be U-shaped side-looking observation during top view, the gap that will during the top view of heater coil 1 be the part of U-shaped is used as space, heating part.Heated object 6 is made up of the annular solder 6c of pipe 6a, junction block 6b and the coincidence part that is entrenched in pipe 6a and junction block 6b.Under the state in space, heating part that heated object 6 is configured in heater coil 1, carry out soldering by carrying out induction heating.
But when using induction heating in the soldering at heat exchanger, the part existed beyond by heated object 6 heats such problem.Particularly, the heating of the iron plate 8 close with heated object 6 is remarkable, exists and produce qualitative unfavorable conditions such as burning on iron plate 8.
This is because, the magnetic flux produced by coil to heated object 6 with external leakage, and by the cause of the metal induction heating beyond heated object 6.
In the past, as suppressing the method sewing magnetic flux, the method used as the magnetic core 19 described in patent documentation 2 was proposed.The state of the induction heating of patent documentation 2 has been shown in Figure 10.Heater coil 1 is formed with the form being wound on magnetic core 19.By producing magnetic flux 10, by metal tube 18 induction heating at this heater coil 1 circulating current.Herein, magnetic core 19 uses that permeability is higher than air, the easy material concentrated of magnetic flux.Thus, when circulating current and when producing magnetic flux 10, magnetic flux 10 concentrates on magnetic core 19 in heater coil 1.So by making magnetic flux 10 concentrate on magnetic core 19, suppress externally sew magnetic flux.
[at first technical literature]
[patent documentation]
Patent documentation 1: No. H10-216930, Japanese Unexamined Patent Publication
Patent documentation 2: No. 4155577th, Japan Patent
[inventing the problem that will solve]
But, as described in use magnetic core document 2 structure in, in heating schedule, magnetic core is exposed on heating with the circulation of cooling, magnetic core can be caused to damage or deterioration., when being heated to the temperature more than this, there is the situation of physical damage or magnetism deterioration in characteristics in the majority below 500 degree of the heat resisting temperature of the strong magnetic material that magnetic core uses.And soldering is carried out mainly with the temperature more than 500 degree, magnetic core is also heated to the temperature close to this temperature.Therefore, when using magnetic core in induction brazing, easily cause damage or the deterioration of magnetic core.
In this high temperature induction heating, magnetic core becomes running stores, there is the problem that man-hour or cost are changed in cost.
Summary of the invention
The present invention completes for solving above-mentioned problem, its object is to, provides and can reduce the replacing man-hour of parts and the induction heating equipment of cost.
[for solving the means of problem]
To achieve these goals, induction heating equipment of the present invention is formed in such a way.
According to a mode of the present invention, a kind of induction heating equipment is provided, it possesses: load coil, and it has the heated object of the metal tube shape configured near metallic object in the gap configuration of pars intermedia, utilizes the electric power come from induction heating power supply by described heated object induction heating; Ancillary coil, its central shaft is parallel with the central shaft of described heater coil, and is configured in the mode producing magnetic flux in the opposite direction of the magnetic flux produced with described heater coil.
[invention effect]
As mentioned above, according to induction heating equipment of the present invention, by possessing the ancillary coil configured in the mode producing magnetic flux in the opposite direction of the magnetic flux produced with heater coil, do not use magnetic core just can suppress the heating of the metal beyond heated object, thus replacing man-hour and the cost of parts can be reduced.
Accompanying drawing explanation
Fig. 1 is the simple stereogram of the induction heating equipment of embodiments of the present invention;
Fig. 2 A is the figure of the representational magnetic flux distribution that in the vertical view of the induction heating equipment of embodiments of the present invention, heater coil and ancillary coil produce respectively;
Fig. 2 B is the figure of flow direction in the right side view of the induction heating equipment of embodiments of the present invention, that mainly produced respectively by heater coil and ancillary coil on iron plate;
Fig. 3 A is the figure of the definition representing the coil dimension in resolving;
Fig. 3 B is the figure representing the coil definition of angulation each other in resolving;
Fig. 4 is the coordinate diagram of the relation of the Distance geometry iron plate temperature represented between heater coil and the respective axle of ancillary coil;
Fig. 5 is the coordinate diagram representing the coil relation of angulation and iron plate temperature each other;
Fig. 6 is the coordinate diagram representing the width of ancillary coil and the relation of iron plate temperature;
Fig. 7 is the coordinate diagram representing the number of turns of ancillary coil and the relation of iron plate temperature;
Fig. 8 is the simple stereogram of the induction heating equipment of the series coil used in embodiments of the present invention;
Fig. 9 is the schematic arrangement figure of induction heating equipment in the past;
Figure 10 is the schematic arrangement figure of the induction heating equipment of use magnetic core in the past.
Embodiment
Hereinafter, with reference to the accompanying drawings of embodiments of the present invention.
Induction heating equipment 30 as embodiments of the present invention has been shown in Fig. 1.
Induction heating equipment 30 is configured to possess heater coil 1, ancillary coil 2, induction heating power 4.Induction heating power 4 prepares heater coil 1 first induction heating power 4A and these two heating power supplies of ancillary coil 2 second induction heating power 4B.
As have sensed heater 30 heating heated object 6 object an example heat exchanger by heated object 6, plate wing 7 and protection iron plate 8 form.
Plate wing 7 is parallel with iron plate 8, on the upper space of plate wing 7 configuration iron plate 8.Iron plate 8 is an example of metallic object.
Heated object 6 has pipe 6a, junction block 6b, is configured in the annular solder 6c of the coincidence part of pipe 6a and junction block 6b, is an example of the heated object of metal tube shape.Pipe 6a configures with and the form inserting plate wing 7 and iron plate 8 orthogonal with plate wing 7 and iron plate 8.Junction block 6b makes pipe 6a be connected to each other, and eliminates junction in figure.
First induction heating power 4A supplies electric power by cable 5a to heater coil 1.
Another second induction heating power 4B supplies electric power by cable 5b to ancillary coil 2.Now, the current phase of two first and second induction heating power 4A, 4B is set as consistent with each other.
Heater coil 1 is provided with gap 1a can arrange the mode of heated object 6 at the pars intermedia of solenoid coil.Heater coil 1 configures in the mode being inserted with heated object 6 in the gap 1a of the pars intermedia at heater coil 1.
Ancillary coil 2 is solenoid coil.Ancillary coil 2 configures to make the central shaft 2b of ancillary coil 2 mode parallel with the central shaft 1b of heater coil 1.And ancillary coil 2 configures in the mode of the reciprocal magnetic flux 11 in direction producing the magnetic flux 10 produced with heater coil 1.Ancillary coil 2 can use the component same with heater coil 1.
Induction heating equipment 30 action in such a way of described structure.
First, the mode being positioned at the gap 1a of the pars intermedia of heater coil 1 with heated object 6 configures heater coil 1.
Afterwards, to two first and second induction heating power 4A, 4B energising, thus the high-frequency current that circulates in heater coil 1 with ancillary coil 2.
By being energized respectively to heater coil 1 and ancillary coil 2, thus produce magnetic flux 10,11 respectively from coil 1,2.Utilize these magnetic fluxs 10,11 by heated object 6 induction heating.When the temperature of heated object 6 exceedes the fusing point of the wlding of annular solder 6c, annular solder 6c melts.
After annular solder 6c fusing, stop the energising of two first and second induction heating power 4A, 4B.
Afterwards, by being cooled by annular solder 6c, annular solder 6c is solidified, thus engage the pipe 6a and junction block 6b that form heated object 6.
Ancillary coil 2 has the effect will eliminated with the magnetic flux of external leakage from heater coil 1 to heated object 6.This is described below.
Fig. 2 A illustrates the state of the example of the representative magnetic flux 10,11 in the magnetic flux 10,11 that heater coil 1 and ancillary coil 2 both sides produce.Electric current 9 is represented by the arrow shown in thick dashed line.When this electric current 9 circulates with ancillary coil 2 at heater coil 1, represented the representative magnetic flux 10 in the magnetic flux that heater coil 1 produces by thick line, represented the representative magnetic flux 11 in the magnetic flux that ancillary coil 2 produces by fine rule.
The distribution of the magnetic flux 11 that the magnetic flux 10 being conceived to heater coil 1 generation produces with ancillary coil 2.When observing heater coil 1 and ancillary coil 2 outside, the magnetic flux 11 that magnetic flux 10 and ancillary coil 2 that known heater coil 1 produces produce is opposite direction (on the iron plate 8 for example, referring to following Fig. 2 B).It can thus be appreciated that in the outside of heater coil 1 with ancillary coil 2, each magnetic flux 10,11 weakens mutually.In order to confirm the magnetic flux distribution near iron plate 8, Fig. 2 B illustrates the magnetic flux distribution in the right side view of Fig. 2 A.Known, near iron plate 8, the magnetic flux 11 that magnetic flux 10 and ancillary coil 2 that heater coil 1 produces produce also is in the other direction, mutually weakens.It should be noted that, for the ease of illustrating the magnetic flux distributed in space with understanding, Fig. 2 A and Fig. 2 B all eliminates heated object.
So, by using ancillary coil 2, not using magnetic core just can suppress to sew magnetic flux to the part beyond heated object 6, thus the heating of iron plate 8 can be suppressed.
Herein, the shape of ancillary coil 2 and configuration are described.
About shape and the configuration of ancillary coil 2, utilize and resolve and carried out the derivation of better condition.Analytic simulation software Femtet (registered trade mark) (ver.11.1) (field, village software limited company) is used in parsing.
The analytic modell analytical model used in resolving is described.
Analytic modell analytical model and Fig. 1 are formed equivalently.But, because problem is the temperature of iron plate 8, therefore get rid of heated object 6 and resolve with plate wing 7 ground.Iron plate 8 burn impact immediately below the gap 1a of the pars intermedia of heater coil 1 significantly.Therefore, the temperature of the iron plate 8 of this part is resolved.
Utilize Fig. 3 A and Fig. 3 B, the heater coil 1 used in resolving and the shape of ancillary coil 2 and configuration are described.
Fig. 3 A is the vertical view of the induction heating equipment 30 shown in Fig. 1.Herein, by W
1represent the width of heater coil 1, by W
2represent the width of ancillary coil 2, by D
1represent the coil diameter of heater coil 1, by D
2represent the coil diameter of ancillary coil 2, represent the distance between coil 1,2, by d by L
1represent the diameter of the wire rod of heater coil 1, by d
2represent the diameter of the wire rod of ancillary coil 2.The width W of heater coil 1
1represent the width comprising the heater coil 1 of the wire rod of coil 1, as an example, this width is set to 26mm.The width W of ancillary coil 2
2represent the width comprising the ancillary coil 2 of the wire rod of coil 2, as an example, this width is set to 16mm.The coil diameter D of heater coil 1
1for forming solenoidal, the size that comprises the diameter of coil wire rod of heater coil 1, as an example, this diameter is set to 16mm.The coil diameter D of ancillary coil 2
2for forming solenoidal, the size that comprises the diameter of coil wire rod of ancillary coil 2, as an example, this diameter is set to 16mm.Distance L between coil 1,2 is the distance between the central shaft 1b of the heater coil 1 and central shaft 2b of ancillary coil 2, as an example, this distance is set to 17mm.The diameter d of the wire rod of heater coil 1
12mm is set to as an example.The diameter d of the wire rod of ancillary coil 2
22mm is set to as an example.Heater coil 1 is positioned at the gap 1a of pars intermedia mode with heated object 6 configures.As an example of heater coil 1, respectively reel in the both sides of heated object 6 three turn coil, amounts to and be wound with six turn coil.And, as an example, the number of turns of ancillary coil 2 is set to six circles.
As an example, central shaft 32 angulation of the straight line 31 intersected vertically respectively with the central shaft 1b of heater coil 1 and the central shaft 2b of ancillary coil 2 and pipe 6a is defined as coil 1,2 angulation θ each other.Fig. 3 B is the right side view of the induction heating equipment 30 shown in Fig. 1, and angle shown here is coil 1,2 angulation θ each other.In parsing, the mode becoming 90 degree with this angle θ sets.
As an example, iron plate 8 is long limit 500 × minor face, 150 × thickness 1mm, and the mode becoming 15mm with the distance of the central shaft 1b of heater coil 1 and iron plate 8 is configured.
As an example, the electric current independently supplied is set to 400A, and is fixing by the phase settings of both sides from first and second induction heating power 4A, 4B to heater coil 1 and ancillary coil 2.
As an example, the material of iron plate 8 is the iron that plating has tin, burns when temperature rises to the temperature higher than 400 degree.Therefore, can say that the condition of the temperature of iron plate 8 below 400 degree is preferred condition.And, from heating time more than needed, more preferably the temperature of iron plate 8 is below 300 degree.So, the temperature of the iron plate 8 during the parameter changed in analytic modell analytical model is studied, derives and make its temperature below 400 degree and the condition of the ancillary coil 2 of less than 300 degree.
The parameter used in parsing has four, the distance L between the coil being respectively heater coil 1 and ancillary coil 2, coil 1,2 angulation θ each other, the width W of ancillary coil
1, the number of turns of ancillary coil 2.These parameters are resolved respectively, carries out the derivation of the best point of ancillary coil 2.
First, the result that the relation of the distance L between figure 4 illustrates the coil of heater coil 1 and ancillary coil 2 and the temperature of iron plate 8 is resolved.
As shown in Figure 4, when the distance L of heater coil 1 and ancillary coil 2 at below 25mm, the temperature of iron plate 8 is below 400 degree.And when the distance L of heater coil 1 and ancillary coil 2 is at below 18mm, the temperature of iron plate 8 is below 300 degree.In addition, in order to make heater coil 1 not contact with ancillary coil 2, heater coil 1 is made to be greater than 16mm with the distance L of ancillary coil 2.
Based on the above, the distance L of preferred heater coil 1 and ancillary coil 2 is at below 25mm and be greater than 16mm, is more preferably greater than 16mm at below 18mm.
Next, figure 5 illustrates the result that the relation of the coil temperature of angulation θ and iron plate 8 is each other resolved.
As shown in Figure 5, when angle θ is more than 70 degree, the temperature of iron plate 8 is below 400 degree.And when angle θ is more than 85 degree, the temperature of iron plate 8 is below 300 degree.In addition, in order to make ancillary coil 2 not contact with iron plate 8, make coil each other angulation θ below 90 degree.
Based on the above, preferred coil each other angulation θ more than 70 degree and below 90 degree, more preferably more than 85 degree and below 90 degree.
Width W to ancillary coil has been shown in Fig. 6
2the result of resolving is carried out with the relation of the temperature in iron plate portion 8.
As shown in Figure 6, width W
2when below 30mm, the temperature of iron plate 8 is below 400 degree.And, work as width W
2when below 22mm, the temperature of iron plate 8 is below 300 degree.In addition, the width W making ancillary coil 2 is needed
2be greater than width when fully thickly being reeled by ancillary coil 2, in a concrete example of present embodiment, the diameter d of the wire rod of ancillary coil 2
2for 2mm, the number of turns of coil is six circles, and the width of the ancillary coil 2 when therefore fully thickly being reeled by ancillary coil 2 is 12mm.
Based on the above, the width W of preferred ancillary coil
2be greater than 12mm at below 30mm, be more preferably greater than 12mm at below 22mm.
Finally, figure 7 illustrates the result that the relation of the number of turns of ancillary coil 2 and the temperature of iron plate 8 is resolved.
As shown in Figure 7, when the number of turns is below five circles above 21 enclose, the temperature of iron plate 8 is at 400 degree.And when the number of turns is below six circles above 20 enclose, the temperature of iron plate 8 is below 300 degree.When the number of turns based on heater coil 1 be six circles calculate time, the number of turns of preferred ancillary coil 2 at more than 0.85 times less than 3.5 times of the number of turns of heater coil 1, more preferably more than 1 times less than 3.3 times.
According to described structure, by also arranging the ancillary coil 2 that the mode that produces magnetic flux 11 in reverse direction with the magnetic flux 10 produced with heater coil 1 configures except heater coil 1, even if do not arrange magnetic core, also can suppress to sew magnetic flux.Thus, do not need the magnetic core becoming running stores, thus replacing man-hour and the cost of component can be reduced.
It should be noted that, also heater coil 1 and ancillary coil 2 can be connected in series.Below, series coil 3 is called by being connected in series the coil of heater coil 1 with ancillary coil 2.The schematic drawing using the induction heating equipment 30B of series coil 3 has been shown in Fig. 8.
Induction heating equipment 30B possesses the series coil 3, the independent induction heating power 4 that heater coil 1 and ancillary coil 2 are connected in series.Heat exchanger is made up of heated object 6, plate wing 7 and iron plate 8.
The heat exchanger of an example as the object with the heated object 6 that sensed heater 30B heats is identical with aforesaid heat exchanger.
Series coil 3 is formed by being connected in series heater coil 1 and ancillary coil 2.It should be noted that, the shape of heater coil 1 and ancillary coil 2 and configuring as described above.
Induction heating power 4 is connected with the end of series coil 3 by cable 5, is supplied by high-frequency induction electric power to series coil 3.
The induction heating equipment 30B of described structure carries out action in such a way.
First, the mode being positioned at the gap 1a of the pars intermedia of heater coil 1 with heated object 6 configures series coil 3.
Afterwards, induction heating power 4 is energized, electric power is circulated in series coil 3.
High-frequency current makes the heater coil 1 of series coil 3 produce magnetic flux 10,11 respectively with ancillary coil 2.Carry out the action same with explanation before afterwards.Ancillary coil 2 has the effect that the magnetic flux 10 that produced by heater coil 1 is eliminated.Utilize the magnetic flux 10 produced by heater coil 1 by heated object 6 induction heating.Thus, annular solder 6c melts, and by being cooled, is engaged by the pipe 6a forming heated object 6 with junction block 6b.
Supplied by power supply 4A, 4B respectively in the structure of electric power with ancillary coil 2 at heater coil 1 as shown in Figure 1, need two induction heating powers 4A, 4B, thus the problem that the cost that there is equipment improves.And, also need to make two induction heating powers 4A, 4B become synchronous mode and control.
According to said structure, by heater coil 1 and ancillary coil 2 are connected in series, an induction heating power 4 can be set, thus the problem of equipment cost and the problem of control can be solved.And, same with the structure shown in Fig. 1, even if do not arrange magnetic core, also can suppress to sew magnetic flux, thus, also can reduce replacing man-hour and the cost of parts.
It should be noted that, by the arbitrary execution mode in appropriately combined above-mentioned various execution mode or variation or variation, the effect had separately can be played.
Industrial applicibility
Induction heating equipment of the present invention has the reduction replacing man-hour of parts and the effect of cost, and can be applicable to the purposes of the soldering of the metal tube at middle heat exchangers used such as air-conditionings.And induction heating equipment of the present invention also can be applicable in the purposes of the heating of the metal tubes such as the quench hardening of metal tube.
Claims (4)
1. an induction heating equipment, possesses:
Load coil, it has the heated object of the metal tube shape configured near metallic object in the gap configuration of pars intermedia, utilize the electric power come from induction heating power supply by described heated object induction heating;
Ancillary coil, its central shaft is parallel with the central shaft of described load coil, and is configured in the mode producing magnetic flux in the opposite direction of the magnetic flux produced with described load coil,
The surface crosswise of the magnetic flux that described load coil produces at described pars intermedia and described heated object.
2. induction heating equipment as claimed in claim 1, wherein,
With the described central shaft of described load coil and the straight line of the described orthogonality of center shaft of described ancillary coil and the central shaft angulation of described heated object more than 70 degree and less than 90 degree.
3. induction heating equipment as claimed in claim 1 or 2, wherein,
The number of turns of described ancillary coil is more than 0.85 times less than 3.5 times of the number of turns of described heater coil.
4. induction heating equipment as claimed in claim 1 or 2, wherein,
Described heater coil and described ancillary coil are connected in series, and from an induction heating power supply electric power.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013106303A JP5842183B2 (en) | 2013-05-20 | 2013-05-20 | Induction heating device |
| JP2013-106303 | 2013-05-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104185325A CN104185325A (en) | 2014-12-03 |
| CN104185325B true CN104185325B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410204739.4A Active CN104185325B (en) | 2013-05-20 | 2014-05-15 | Induction heating equipment |
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| JP (1) | JP5842183B2 (en) |
| CN (1) | CN104185325B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017004694A (en) * | 2015-06-08 | 2017-01-05 | パナソニックＩｐマネジメント株式会社 | Induction heating coil for soldering |
| JP6268653B2 (en) * | 2015-06-08 | 2018-01-31 | パナソニックＩｐマネジメント株式会社 | Induction heating coil and heating method |
| NL2015512B1 (en) * | 2015-09-28 | 2017-04-20 | Ultimaker Bv | Inductive nozzle heating assembly. |
| DE102022100728B4 (en) * | 2022-01-13 | 2023-08-24 | Bruker Optics Gmbh & Co. Kg | Desorber for a spectrometer |
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|---|---|---|---|---|
| EP0599519A1 (en) * | 1992-11-13 | 1994-06-01 | Raychem Corporation | Low emission induction heating coil |
| CN2259037Y (en) * | 1996-06-17 | 1997-08-06 | 丘波岭 | High frequency induction electromagnetic heating device |
| JP2014025118A (en) * | 2012-07-27 | 2014-02-06 | Fuji Electric Co Ltd | Induction heating apparatus |
| CN103567425A (en) * | 2013-11-18 | 2014-02-12 | 上海东震冶金工程技术有限公司 | High-efficiency electromagnetic induction heating device for molten steel in tundish |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3156746B2 (en) * | 1994-06-21 | 2001-04-16 | 北芝電機株式会社 | Induction heating device |
| US5786575A (en) * | 1995-12-20 | 1998-07-28 | Gas Research Institute | Wrap tool for magnetic field-responsive heat-fusible pipe couplings |
| JPH1092561A (en) * | 1996-09-19 | 1998-04-10 | Kitashiba Denki Kk | Induction heating apparatus |
| JPH10216930A (en) * | 1997-02-12 | 1998-08-18 | Keiji Matsumoto | Joining method for tube with joint in heat exchanger |
| JP4372329B2 (en) * | 2000-10-03 | 2009-11-25 | 北芝電機株式会社 | Induction heating device |
| JP4889534B2 (en) * | 2007-03-23 | 2012-03-07 | 三菱電機株式会社 | Induction heating cooker |
| JP5063755B2 (en) * | 2010-08-09 | 2012-10-31 | 三井造船株式会社 | Induction heating apparatus and induction heating method |
| JP2012058655A (en) * | 2010-09-13 | 2012-03-22 | Ricoh Co Ltd | Fixing device and image forming device |
-
2013
- 2013-05-20 JP JP2013106303A patent/JP5842183B2/en active Active
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2014
- 2014-05-15 CN CN201410204739.4A patent/CN104185325B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0599519A1 (en) * | 1992-11-13 | 1994-06-01 | Raychem Corporation | Low emission induction heating coil |
| CN2259037Y (en) * | 1996-06-17 | 1997-08-06 | 丘波岭 | High frequency induction electromagnetic heating device |
| JP2014025118A (en) * | 2012-07-27 | 2014-02-06 | Fuji Electric Co Ltd | Induction heating apparatus |
| CN103567425A (en) * | 2013-11-18 | 2014-02-12 | 上海东震冶金工程技术有限公司 | High-efficiency electromagnetic induction heating device for molten steel in tundish |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014229395A (en) | 2014-12-08 |
| JP5842183B2 (en) | 2016-01-13 |
| CN104185325A (en) | 2014-12-03 |
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