CN208337921U - Low emissivity electromagnetic induction heater - Google Patents

Abstract

The utility model discloses Low emissivity electromagnetic induction heaters, belong to electromagnetic heating technique field, solves electromagnetic induction heater height radiation in the prior art, the low technical problem of heating efficiency, Low emissivity electromagnetic induction heater in the utility model, including radiation protection shell and it is located at the intracorporal electromagnetic wire coil of radiation protection shell, the radiation protection shell includes upper housing, it is offered on the upper housing and the matched heating gate of cookware, the Low emissivity electromagnetic induction heater further includes the reflector for being located at the heating gate edge and extending downwardly to be centered around on the outside of the electromagnetic wire coil, the reflector is connected as one with the upper housing.

Description

Low emissivity electromagnetic induction heater

[technical field]

The utility model relates to electromagnetic heating technique field more particularly to Low emissivity electromagnetic induction heaters.

[background technique]

Electromagnetic heater is that cookware is heated using electromagnetic induction principle, can inevitably be generated during heating Some electromagnetic radiation, electromagnetic radiation leakage in order to prevent, electromagnetic heater is internally provided with radiation protection shell in the prior art, Electromagnetic wire coil is mounted in radiation protection shell, and radiation protection shell includes upper housing and lower case, is offered on upper housing and cookware The heating gate to match, magnetic line of force a part that electromagnetic wire coil generates when working are absorbed by radiation protection shell, and a part passes through institute It states heating gate and is transferred to cookware, to realize the heating to cookware.Due to not being defined in the prior art to the size of heating gate, Therefore when heating gate size be arranged it is excessive when, then by heating gate leak magnetic flux increase, lead to electromagnetic radiation value Increase；If the size of heating gate be arranged it is too small when, most of magnetic line of force can be absorbed by radiation protection shell, reduce electromagnetic heating Heating efficiency.

[utility model content]

A kind of Low emissivity electricity is provided the technical problem to be solved by the utility model is to overcome the deficiencies in the prior art Metal-magnetic needle can enhance the albedo of electromagnetic wave, promote heating efficiency, and can be reduced the leakage of electromagnetic wave, drop The radiation value of low electromagnetic induction heater.

In order to solve the above technical problems, the utility model adopts the following technical solution:

Low emissivity electromagnetic induction heater, including radiation protection shell and be located at the intracorporal electromagnetic wire coil of radiation protection shell, institute Stating radiation protection shell includes upper housing and lower case, is offered on the upper housing and the matched heating gate of cookware, the low spoke Radio Metal-magnetic needle further includes being located at the heating gate edge and extending downwardly to be centered around on the outside of the electromagnetic wire coil Reflector, the reflector is connected as one with the upper housing.

Further, the upper housing includes electromagnetic absorption piece and the ELECTROMAGNETIC REFLECTION piece on the inside of electromagnetic absorption piece, institute Reflector is stated to be connected as one with the ELECTROMAGNETIC REFLECTION piece.

Further, the reflector and the ELECTROMAGNETIC REFLECTION piece are integrally formed.

Further, the ELECTROMAGNETIC REFLECTION piece is the plastic cement that aluminium flake, aluminum alloy sheet or surface are coated with the coat of metal Piece.

Further, the ELECTROMAGNETIC REFLECTION piece rivets with the electromagnetic absorption piece and fixes or crimp to form complex.

Further, the electromagnetic wire coil includes wire coil bracket and the magnetic conduction item for being mounted on the wire coil bracket back side, described anti- The bottom for penetrating cover is equipped with the bending edges that extend radially inwardly, projected length of the bending edges on the magnetic conduction item be 3mm~ 15mm。

Further, there are the gaps of 1mm~10mm between the bending edges and the magnetic conduction item.

Further, the reflector is in horn-like, and the reflector has upper opening and under shed, the upper opening Bore is greater than the bore of the under shed, and the upper opening matches with the heating gate.

Further, the diameter of the heating gate is D, and the peripheral side diameter of the electromagnetic wire coil is D1, meet 15mm≤ D-D1≤45mm。

Further, the lower case includes the box body of side reflector plate and open upper end, and the box body includes being integrally formed Bottom absorbing sheet and side absorbing sheet, the side reflector plate is located on the inside of the side absorbing sheet, and the upper case cover is mounted in the box On body.

The utility model has the beneficial effects that

The Low emissivity electromagnetic induction heater of the utility model further includes being located at heating gate edge and extending downwardly to enclose The reflector being wound on the outside of electromagnetic wire coil, reflector are connected as one with upper housing.Reflector is centered around on the outside of electromagnetic wire coil, such as This one, reflector can the electromagnetic wave that will likely escape reflected towards heating gate direction so that more magnetic lines of force converge in pot Have bottom, promotes heating efficiency；In addition, the top due to reflector is arranged along the edge of heating gate, and reflector and upper casing Body is connected as one, therefore can be promoted to the wrapped of electromagnetic wire coil, reflects escape above electromagnetic wire coil most possibly Electromagnetic wave, to reduce the leakage of electromagnetic wave, reduce the radiation of electromagnetic induction heater to avoid it to external radiation Value；Finally, the waste material stretching when reflector in the utility model can use heating gate processing is made, therefore can effectively subtract The waste of few material, reduces manufacturing cost.

Upper housing includes electromagnetic absorption piece and the ELECTROMAGNETIC REFLECTION piece on the inside of electromagnetic absorption piece, reflector and ELECTROMAGNETIC REFLECTION Piece is connected as one.At work through detection electromagnetic heater, the magnetic field of alternation produces 10Hz- because of harmonic wave effect The electromagnetic wave of 400KHz, the utility model are shielded using the frequency electromagnetic waves that ELECTROMAGNETIC REFLECTION piece will be greater than 100KHz in electromagnetic heating In device, make it by reflection loss, reduces the risk of its leakage.And the low-frequency electromagnetic wave lower than 100KHz is inhaled by electromagnetic absorption piece Conduction is received to the cookware on electromagnetic heater, increases its efficiency, while also preventing the leakage of low-frequency electromagnetic wave；In addition, Reflector is connect with ELECTROMAGNETIC REFLECTION piece, can reduce the assembling difficulty of reflector.

Reflector and ELECTROMAGNETIC REFLECTION piece are integrally formed.It is designed in this way, the assembling procedure in later period can be reduced, while also guaranteeing The sealing performance of reflector and ELECTROMAGNETIC REFLECTION piece junction, avoids electromagnetic leakage.

ELECTROMAGNETIC REFLECTION piece rivets with electromagnetic absorption piece and fixes or crimp to form complex.It is designed in this way, mounting structure letter It is single, it is convenient for commercialization.

Electromagnetic wire coil includes wire coil bracket and the magnetic conduction item for being mounted on the wire coil bracket back side, and the bottom of reflector is equipped with radial The bending edges to extend internally, projected length of the bending edges on magnetic conduction item are 3mm~15mm.It is designed in this way, can either effectively subtract The leakage of few magnetic line of force, and can guarantee the heat dissipation effect of electromagnetic wire coil；When projected length of the bending edges on magnetic conduction item is less than 3mm When, due to be transferred to the magnetic line of force at the right-angled corner of magnetic conduction outer end can be formed because of the change in path overshoot leak, because The too short of this bending edges setting can not play the role of reflecting the magnetic line of force, cause the magnetic line of force from bottom leakage, cause electromagnetism spoke It penetrates and increases；When projected length of the bending edges on magnetic conduction item is greater than 15mm, bending edges block the area of electromagnetic wire coil bottom compared with Greatly, radiation air is not easy the position lower section for being circulated to electromagnetic wire coil bottom corresponding to bending edges, so as to cause the heat dissipation of electromagnetic wire coil Effect is poor.

There are the gaps of 1mm~10mm between bending edges and magnetic conduction item.Be designed in this way, can make bending edges and magnetic conduction item it Between there are the air gap, to promote the reflecting effect to the magnetic line of force, and required safety when electric equipment compartment safe handling can be reached Distance, while the height of fuselage can also be reduced；When gap existing between bending edges and magnetic conduction item is less than 1mm, bending edges pair Magnetic line of force reflecting effect is poor, and radiation-proof effect is poor, while even electrical phenomena easily occurs for electric equipment compartment；It is deposited when between bending edges and magnetic conduction item Gap be greater than 10mm when, increase the height of fuselage, improve manufacturing cost.

For reflector in horn-like, reflector has upper opening and under shed, and the bore of upper opening is greater than the bore of under shed, Upper opening matches with heating gate.It is designed in this way, the reflecting surface of reflector can be made to be arranged towards heating gate direction, promoted instead with this Efficiency is penetrated, and the magnetic line of force after reflection can be more evenly distributed in pan bottom, while design is also avoided that irony in this way Desktop reversely heated, enable electromagnetic induction heater normal use on irony desktop；Furthermore it designs in this way Afterwards, it is not necessary that bottom reflection piece is arranged in lower case, further reduces costs.

The diameter of heating gate is D, and the peripheral side diameter of electromagnetic wire coil is D1, meets 15mm≤D-D1≤45mm.So set Meter, can either guarantee heating efficiency, and can reduce electromagnetic exposure；When D-D1 is less than 15mm, the aperture of heating gate is too small, reflection The magnetic line of force to cookware bottom is less, and heating efficiency is lower；When D-D1 is greater than 45mm, the aperture of heating gate is too big, and electromagnetism is let out Reveal more.

Lower case includes the box body of side reflector plate and open upper end, and box body includes that integrally formed bottom absorbing sheet and side absorb Piece, side reflector plate are located on the inside of the absorbing sheet of side, and upper case cover is on box body.It is designed in this way, radiation protection can be further increased Shell effectively reduces electromagnetic radiation value to shielding electromagnetic waves effect.

These features and advantages of the utility model will the detailed exposure in following specific embodiment, attached drawing.

[Detailed description of the invention]

The utility model is described further with reference to the accompanying drawing:

Fig. 1 is the cross-sectional view of electromagnetic oven in the preferred embodiment in the utility model；

Fig. 2 is the enlarged diagram of A in Fig. 1；

Fig. 3 is the detonation configuration signal of radiation protection shell, electromagnetic wire coil and reflector in the preferred embodiment in the utility model Figure.

Appended drawing reference:

1, pedestal；2, panel；3, upper ledge；4, electromagnetic wire coil；41, wire coil bracket；42, magnetic conduction item；5, radiation protection shell； 51, electromagnetic absorption piece；52, ELECTROMAGNETIC REFLECTION piece；53, box body；54, side reflector plate；6, insulating base；7, reflector；8, gap.

[specific embodiment]

The Low emissivity electromagnetic induction heater of the utility model, including radiation protection shell and be located at radiation protection shell it is intracorporal Electromagnetic wire coil, the radiation protection shell include upper housing and lower case, are offered on the upper housing and the matched heating of cookware Mouthful, the Low emissivity electromagnetic induction heater further includes being located at the heating gate edge and extending downwardly to be centered around the electricity Reflector on the outside of magnet-wire disk, the reflector are connected as one with the upper housing.Reflector is centered around on the outside of electromagnetic wire coil, In this way, which the electromagnetic wave that reflector can will likely escape is reflected towards heating gate direction, so that more magnetic lines of force converge in Cookware bottom promotes heating efficiency；In addition, due to reflector top along heating gate edge be arranged, and reflector with it is upper Shell is connected as one, therefore can be promoted to the wrapped of electromagnetic wire coil, reflects escape above electromagnetic wire coil most possibly The electromagnetic wave of ease, to reduce the leakage of electromagnetic wave, reduces the radiation of electromagnetic induction heater to avoid it to external radiation Value；Finally, the waste material stretching when reflector in the utility model can use heating gate processing is made, therefore can effectively subtract The waste of few material, reduces manufacturing cost.

The technical solution of the utility model embodiment is explained below with reference to the attached drawing of the utility model embodiment and Illustrate, but following embodiments are only the preferred embodiment of the utility model, and not all.Based on the implementation example in the implementation mode, Those skilled in the art's obtained other embodiments without making creative work, belong to the utility model Protection scope.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of Describe the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " multiple " It is two or more, unless otherwise restricted clearly.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be Concrete meaning in the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above " One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only Indicate that first feature horizontal height is less than second feature.

Shown in 3, the electromagnetic induction heater in this preferred embodiment is electromagnetic oven, and electromagnetic oven includes bottom Seat 1, panel 2, upper ledge 3, electromagnetic wire coil 4 and radiation protection shell 5, panel 2, which is mounted on upper ledge 3, forms cover assembly, radiation protection Shell 5 is mounted in the furnace chamber that cover assembly and pedestal 1 are formed, and electromagnetic wire coil 4 is located in radiation protection shell 5, radiation protection shell 5 It is inside additionally provided with insulating base 6, electromagnetic wire coil 4 is mounted on insulating base 6.

Specifically, radiation protection shell 5 includes upper housing and lower case in the present embodiment, upper housing includes electromagnetic absorption piece 51 With ELECTROMAGNETIC REFLECTION piece 52, for electromagnetic absorption piece 51 close to panel 2, ELECTROMAGNETIC REFLECTION piece 52 is located at the inside of electromagnetic absorption piece 51, and with The distance of 0mm~2mm is kept between panel 2.In order to simplify the installation of ELECTROMAGNETIC REFLECTION piece 52, it is convenient for commercialization, in the present embodiment ELECTROMAGNETIC REFLECTION piece 52 and electromagnetic absorption piece 51 rivet fixed or crimp and to form complex.Lower case includes 54 He of side reflector plate The box body 53 of open upper end, box body 53 include integrally formed bottom absorbing sheet and side absorbing sheet, and side reflector plate 54 is mounted on side suction The inside to take up, side reflector plate 54 and ELECTROMAGNETIC REFLECTION piece 52 are the modeling that aluminium flake, aluminum alloy sheet or surface are coated with the coat of metal Film, for upper case cover on box body 53, the edge of ELECTROMAGNETIC REFLECTION piece 52 is fitted in the top of side reflector plate 54.In this way, Radiation protection shell 5 wraps up electromagnetic wire coil 4 wherein, to realize to shielding electromagnetic waves, effectively reduces electromagnetic radiation value.

At work through detection electromagnetic oven, the magnetic field of alternation produces the electromagnetism of 10Hz-400KHz because of harmonic wave effect Wave, the present embodiment are shielded using the frequency electromagnetic waves that ELECTROMAGNETIC REFLECTION piece 52 and side reflector plate 54 will be greater than 100KHz in radiation protection shell In body 5, make it by reflection loss, reduces the risk of its leakage.And the low-frequency electromagnetic wave lower than 100KHz is by electromagnetic absorption piece 51 Assimilation and conductivity increases its efficiency to cookware, while also preventing the leakage of low-frequency electromagnetic wave.It is also provided on upper housing and pot Have matched heating gate, i.e., offer the through-hole that a cookware matches respectively on electromagnetic absorption piece 51 and ELECTROMAGNETIC REFLECTION piece 52, Two through-holes are arranged concentrically and are formed heating gate, and magnetic line of force a part that electromagnetic wire coil 4 generates when working is transmitted across heating gate To cookware, to realize the heating to cookware.

Electromagnetic oven in this preferred embodiment further includes being located at heating gate edge and extending downwardly to be centered around electromagnetic wire coil 4 The reflector 7 in outside, for reflector 7 in horn-like, reflector 7 has upper opening and under shed, and the bore of upper opening is opened under being greater than The bore of mouth, upper opening is arranged concentrically with heating gate and diameter is equal, and reflector 7 is connected as one with upper housing, with fixed anti- Penetrate the installation site of cover 7.In the present embodiment, the installation for the ease of reflector 7 is fixed, the top of reflector 7 preferably with electricity Magnetoreflection piece 52 is fixedly connected.In this way, in electromagnetic oven work, electromagnetic wave that reflector 7 can will likely escape is towards adding The reflection of the direction Re Kou promotes heating efficiency so that more magnetic lines of force converge in cookware bottom；In addition, due to the top of reflector 7 Portion is arranged along heating gate edge, therefore can be promoted to the wrapped of electromagnetic wire coil 4, is reflected most possibly from electromagnetic wire coil The electromagnetic wave of top escape, to reduce the leakage of electromagnetic wave, reduces the radiation value of electromagnetic oven to avoid it to external radiation； Secondly, the reflecting surface of reflector 7 is arranged towards heating gate direction in the present embodiment, it is able to ascend reflection efficiency, and after reflection The magnetic line of force can be more evenly distributed in pan bottom, while such design is also avoided that and reversely add to the desktop of irony Heat enables electromagnetic oven normal use on irony desktop, avoids being burned；Furthermore the reflector 7 in the present embodiment can benefit It is made of waste material stretching of the ELECTROMAGNETIC REFLECTION piece 52 when processing heating gate after punching press, therefore the waste of material can be effectively reduced； Finally, it is not necessary that bottom reflection piece is arranged in lower case, being further reduced costs after design in this way.

In order to simplify the assembling procedure in later period, reflector 7 and ELECTROMAGNETIC REFLECTION piece 52 in the present embodiment are integrally formed.So One, it also ensures the sealing performance of reflector 7 Yu 52 junction of ELECTROMAGNETIC REFLECTION piece, avoids electromagnetic leakage.

It is understood that reflector seperated can also be formed with ELECTROMAGNETIC REFLECTION piece, reflector and ELECTROMAGNETIC REFLECTION piece pass through weldering Connect or combination process be connected to one, or reflector and electromagnetic absorption piece are connected to one, reflector with Electromagnetic absorption piece, which is welded and fixed, to be integrated or is integrally formed.

Electromagnetic wire coil 4 in the present embodiment includes wire coil bracket 41 and the magnetic conduction item 42 for being mounted on the wire coil bracket back side, is The magnetic line of force at the right-angled corner of magnetic conduction outer end reflected, the bottom of reflector is equipped with and radially-inwardly prolongs in the present embodiment It stretches and bending edges 71 in a ring, projected length L of the bending edges 71 on magnetic conduction item 42 is 3mm~15mm.It is designed in this way, it can The leakage of the magnetic line of force is enough effectively reduced, and can guarantee the heat dissipation effect of electromagnetic wire coil；When projected length L is less than 3mm, due to passing It is handed to the magnetic line of force at the right-angled corner of magnetic conduction outer end and can form overshoot because of the change in path and leak, therefore bending edges 71 The too short meeting being arranged can not be played the role of reflecting the magnetic line of force, cause the magnetic line of force from bottom leakage, electromagnetic radiation is caused to increase；When When projected length L is greater than 15mm, the area that bending edges 71 block electromagnetic wire coil bottom is larger, and radiation air is not easy to be circulated to electromagnetic wire Pan bottom corresponds to below the position of bending edges, poor so as to cause the heat dissipation effect of electromagnetic wire coil.Projection in the present embodiment is long Spend the preferred 10mm of L, in this way, can convenient for bending edges 71 machine-shaping and to the reflecting effect of electromagnetic wave with And promote the heat dissipation effect of electromagnetic wire coil.Certainly, optionally, projected length L can also be 3mm, 5mm, 7mm, 9mm, 12mm, 14mm With 15mm etc..As long as projected length L between 3mm and 15mm, will not enumerate here, it is above-mentioned it is listed be only compared with Good embodiment is not used to limit this range.

Magnetic conduction outer end corner is transferred in order to further avoid the magnetic line of force to leak, magnetic conduction item in the present embodiment Outer end corner is equipped with rounded corner, is designed in this way, can comply with the trend of the magnetic line of force, effectively the magnetic line of force can be avoided to change by magnetic stripe It forms overshoot when becoming path and generates leakage.

In order to promote bending edges 71 to the reflecting effect of the magnetic line of force, deposited between bending edges 71 and magnetic conduction item 42 in the present embodiment In the gap of 1mm~10mm 8.It is designed in this way, can make between bending edges 71 and magnetic conduction item 42 there are the air gap, to be promoted pair The reflecting effect of the magnetic line of force, and required safe distance when electric equipment compartment safe handling can be reached, while fuselage can also be reduced Highly；When the height in gap 8 is less than 1mm, bending edges 71 are poor to magnetic line of force reflecting effect, and radiation-proof effect is poor, while electrical Between easily occur even electrical phenomena；When the height in gap 8 is greater than 10mm, the height of fuselage is increased, manufacturing cost is improved.This reality The highly preferred 5mm for applying an intermediate gap 8, in this way, not only can guarantee the reflecting effect to the magnetic line of force, but also can guarantee electric equipment compartment Use distance safely.Certainly, optionally, the height in gap 8 can be also 1mm, 3mm, 4mm, 6mm, 7mm, 9mm and 10mm etc..Only Want the height in gap 8 between 1mm and 10mm, will not enumerate here, it is above-mentioned it is listed be only preferred embodiment , not it is used to limit this range.

It is understood that in order to which reflector to be smoothly sleeved on to the peripheral side of electromagnetic wire coil, reflector from up to down Bottom can also be not provided with bending edges, or setting extends axially downward the bending edges to be formed.

In order to guarantee the heating efficiency of electromagnetic oven and reduce electromagnetic radiation, the diameter of heating gate is D, electromagnetism in the present embodiment The peripheral side diameter of drum is D1, meets 15mm≤D-D1≤45mm.It is designed in this way, can either guarantee heating efficiency, and can drop Low electromagnetic exposure；When D-D1 is less than 15mm, the aperture of heating gate is too small, and the magnetic line of force for reflexing to cookware bottom is less, heating Efficiency is lower；When D-D1 is greater than 45mm, the aperture of heating gate is too big, and electromagnetic exposure is more.D-D1 is preferred in the present embodiment 30mm, certainly, optionally, D-D1 can be also 15mm, 20mm, 25mm, 35mm, 40mm and 45mm etc..As long as D-D1 is between 15mm Between 45mm, will not enumerate here, it is above-mentioned it is listed be only preferred embodiment, be not used to limit this model It encloses.

Using EN62233-2008 standard, and using ELT-400 household electrical appliances electromagnetic radiation exposure measuring instrument in the present embodiment Electromagnetic oven test after it is found that electromagnetic oven all directions radiation value compared with electromagnetic oven in the prior art, in the present embodiment Fall is 5%-10%；In addition, the heating efficiency in the present embodiment also improves 0.2%-0.4% by contrast test, This is because the reflection of electromagnetic wave of leakage to cookware bottom is increased the reason of the electromagnetic wave absorptivity of cookware by reflector 7.

The utility model only elaborates the effect of the utility model by taking electromagnetic oven as an example, it will be understood that the utility model Structure can also be used on other household appliances such as warmer, rice cooker, electric food warmer or soy bean milk making machine of electromagnetic heating.This non- The variation of matter is also in scope of protection of the utility model.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, being familiar with the those skilled in the art should be understood that the utility model includes but is not limited to attached drawing and specific embodiment party above Content described in formula.The modification of any function and structure principle without departing from the utility model is intended to be included in claims Range in.

Claims (10)

1. Low emissivity electromagnetic induction heater, including radiation protection shell and it is located at the intracorporal electromagnetic wire coil of radiation protection shell, it is described Radiation protection shell includes upper housing, is offered on the upper housing and the matched heating gate of cookware, which is characterized in that the low spoke Radio Metal-magnetic needle further includes being located at the heating gate edge and extending downwardly to be centered around on the outside of the electromagnetic wire coil Reflector, the reflector is connected as one with the upper housing.

2. Low emissivity electromagnetic induction heater according to claim 1, which is characterized in that the upper housing includes electromagnetism Absorbing sheet and the ELECTROMAGNETIC REFLECTION piece on the inside of electromagnetic absorption piece, the reflector are connected as one with the ELECTROMAGNETIC REFLECTION piece.

3. Low emissivity electromagnetic induction heater according to claim 2, which is characterized in that the reflector and the electricity Magnetoreflection piece is integrally formed.

4. Low emissivity electromagnetic induction heater according to claim 2, which is characterized in that the ELECTROMAGNETIC REFLECTION piece is aluminium Piece, aluminum alloy sheet or surface are coated with the sheet of the coat of metal.

5. Low emissivity electromagnetic induction heater according to claim 2, which is characterized in that the ELECTROMAGNETIC REFLECTION piece and institute It states electromagnetic absorption piece riveting fixation or crimping forms complex.

6. Low emissivity electromagnetic induction heater according to claim 1, which is characterized in that the electromagnetic wire coil includes line Disc carrier and the magnetic conduction item for being mounted on the wire coil bracket back side, the bottom of the reflector are equipped with the bending edges extended radially inwardly, Projected length of the bending edges on the magnetic conduction item is 3mm~15mm.

7. Low emissivity electromagnetic induction heater according to claim 6, which is characterized in that the bending edges are led with described There are the gaps of 1mm~10mm between magnetic stripe.

8. according to claim 1 to Low emissivity electromagnetic induction heater described in one of 7, which is characterized in that the reflector In horn-like, the reflector has upper opening and under shed, and the bore of the upper opening is greater than the bore of the under shed, institute Upper opening is stated to match with the heating gate.

9. Low emissivity electromagnetic induction heater according to claim 8, which is characterized in that the diameter of the heating gate is The peripheral side diameter of D, the electromagnetic wire coil are D1, meet 15mm≤D-D1≤45mm.

10. according to claim 1 to Low emissivity electromagnetic induction heater described in one of 7, which is characterized in that the radiation protection Shell further includes lower case, and the lower case includes the box body of side reflector plate and open upper end, and the box body includes being integrally formed Bottom absorbing sheet and side absorbing sheet, the side reflector plate is located on the inside of the side absorbing sheet, and the upper case cover is mounted in the box On body.