CN203219526U - Electromagnetic heating system - Google Patents
Electromagnetic heating system Download PDFInfo
- Publication number
- CN203219526U CN203219526U CN 201220584559 CN201220584559U CN203219526U CN 203219526 U CN203219526 U CN 203219526U CN 201220584559 CN201220584559 CN 201220584559 CN 201220584559 U CN201220584559 U CN 201220584559U CN 203219526 U CN203219526 U CN 203219526U
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- Prior art keywords
- heating system
- electromagnetic heating
- induction coil
- diameter
- ceramic panel
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- 230000006698 induction Effects 0.000 claims abstract description 23
- 239000000919 ceramic Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims description 16
- 230000005855 radiation Effects 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 230000003595 spectral effect Effects 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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- General Induction Heating (AREA)
Abstract
The utility model provides an electromagnetic heating system with a high-frequency induction coil. The diameter of a single guide wire of the induction coil is about 0.2 millimeter, wherein the guide wire with the diameter is proved to have low power losss. The electromagnetic heating system is composed of the following components: a ceramic panel for placing a heating container, an induction coil which is disc-shaped, a heat radiating device and an infrared temperature sensor.
Description
The utility model relates to a kind of system that utilizes the electromagnetic induction heater ware.
Existing electromagnetic heating system generally has the directly advantage of heat production on vessel, and namely directly in heated cooker bottom heat production, actual heater then keeps low temperature.The inferior position of electromagnetic heating system is higher relatively power consumption and the problem of the difficult heat radiation of electronic component.Electronic component is necessary for producing high frequency magnetic field and controlling heating system, but the heat production of the dissipated heat that electronic component produces and induction coil makes the heater temperature rise, and this just requires to improve heating system, solves heat dissipation problem.Simultaneously, the higher power utilization amount of electromagnetic oven high power generation also is to be worth improved part.According to scholars' such as German E.Baum traditional theory, the power loss of lead is by the top layer power loss
The external power loss that causes with magnetic field
Constitute.P wherein
SkinTotal surperficial power loss in the expression coil, I
0The electric current that flows through in the expression conductor, R
0The total D.C. resistance of expression coil, ρ
SkinBe constant, r
0Expression lead radius, δ represents length of penetration; P
AddTotal secondary power loss in the expression coil, η
CuBe the space factor of copper, l
wFor the average turn of lead is long, h
wBe the line layer thickness, k is the conductance of lead, and N is the number of turn, l
SpBe coil height, ρ
AddCoefficient for the secondary power loss.When the conductor cross-section diameter of induction coil reduces, the lead power loss will reduce, thereby reach energy-conserving action.By to the differentiate of total power consumption function, obtain making the diameter of lead power loss minimum to be
Wherein D is best diameter of wire, and k is the conductance of lead, and μ is the magnetic permeability of lead, l
SpBe coil height, f is excitation frequency, and N is the number of turn, C
BpBe constant.
Substance of the present utility model provides the electromagnetic heating system of a kind of low-power consumption, easy heat radiation, intelligent temperature control.
Traditional theory is thought, it is inappropriate that the diameter of induction coil lead further reduces on scholars' such as E.Baum theoretical optimal value D basis, further dwindle because work as the conductor cross-section diameter, the lead power loss enters and increases progressively the interval, does not reach the effect that cuts down the consumption of energy.So the basic value D of conductor cross-section diameter is the lower limit of induction coil diameter of wire.Yet experiment is found: when induction coil was used for electromagnetic heating system, thinner diameter of wire caused further reducing of energy consumption.Therefore, the utility model has redesigned diameter of wire, has improved heat abstractor, and adds temperature sensing device, the problem that overcome the high power loss that electromagnetic heating system exists, is difficult for heat radiation.
The utility model solves the technical scheme that its technical problem adopts:
According to experimental data, the diameter of solid conductor between scholars' such as E.Baum theoretical optimal value D 1/4 to 3/4 between be best.If diameter of wire further reduces, this will produce certain difficulty in the production of lead, increases production cost.Therefore, the lead of the above-mentioned specification of youngster's root twist into one be on the machinery production and electrical principles on optimal selection.
Generally speaking, electromagnetic heating system presses close to be heated the cooker below as much as possible.Differently in this be, another key character of the present invention is exactly between the ceramic panel of induction coil and carrying cooker a thermal insulation to be arranged, make heat can from be heated cooker one side rapidly conduction give induction coil, guarantee the effect of induction coil low temperature.Therefore we only need disperse a little heat that induction coil produces, and this is easy to realize by means of cooling devices such as fans.Simultaneously, the utility model has designed perfect cooling duct, and the dissipated heat that makes electronic component produce is difficult for accumulation.
Because heating realizes outside electromagnetic oven body, namely be heated the living heat of cooker, electromagnetic oven itself can not produce high temperature, so under the existing standard, temperature meter is not done rigid requirement on electromagnetic oven.But heat can be transmitted on the ceramic panel from cooker, makes the latter overheated.And be to be difficult to realize with the temperature that traditional method is measured ceramic panel.Therefore, according to the utility model, a kind of novel optical measurement mechanism is used to detect the temperature of ceramic panel.It comprises a kind of infrared ray responsive device, and for example silicon photoelectric diode can be measured temperature according to Planck's law of radiation.To under the fixed temperature, the radiation wavelength of ceramic panel is in the spectral sensitivity range of transducer, so quantifiable temperature signal can be captured by transducer.According to Wien's displacement law, along with the rising of ceramic panel temperature, the maximum of its radiation spectrum spectral radiance power also can rise.We can further utilize this signal at stop or turn down the power of heating system.
Under overheated situation that may occur in the heating system misoperation of above-mentioned ceramic panel, for example at the empty pot of panel heating a bite, so temperature control system must be carried out a barrier function.For example when temperature surpasses the predefined value of system, heating system will keep closed condition up to artificial disconnection connecting circuit again also, have been found that empty burning state and will have handled this problem because this means the user.And this barrier function control procedure can realize by control electronic devices such as microcomputers.
The beneficial effects of the utility model are, can make the abundant saves energy of electromagnetic heating system in the family, make green life idea find full expression in energy-conservation today that comes into one's own day by day.Simultaneously, system has realized extremely low thermal accumlation, the Based Intelligent Control of temperature, thereby guarantees fail safe and the convenience of operation.
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the vertical view of electromagnetic heating system.
Fig. 2 is the A-A profile among Fig. 1.
Fig. 3 is the B-B profile among Fig. 1.
Fig. 4 is the cross-sectional view that constitutes one lead of induction coil.
In Fig. 1, two electromagnetic ovens 10 are installed on the ceramic panel 12.Optical pickocff 36 is equipped with in the position of closing on central opening 35, and transducer has passed induction coil, for detection of the radiation of ceramic panel.May cause damage to ceramic panel owing to be heated the high temperature of cooker, thereby be necessary to utilize the temperature of 36 pairs of ceramic panels of optical pickocff to measure adjusting power.Optical pickocff 36 is infrared detectors, and its spectral sensitivity is in ultrared scope.According to Wien's displacement law, along with the ceramic panel temperature rises, the maximum of its radiation spectrum spectral radiance power also can rise.Optical pickocff 36 is silicon photoelectric diodes, in preestablishing the safe temperature scope, the energy of ceramic panel spectral radiance power is in the spectral sensitivity range of optical pickocff, so formed the signal that to survey, can be used for regulating heating power after this signal is handled by microcomputer or disconnect electromagnetic heating system.
In Fig. 2, the adjusting that we utilize knob 26 and power governor 27 to realize heating power, these electronic components can be installed under the ceramic panel 12, and it is stashed.Tray box 23 both sides that sheet metal constitutes are connecting aluminum cooling body 15.The top of cooling body 15 is fluted 29, and magnetic field hair generator 14 is housed in the groove.There is supporting plate 16 cooling body 15 belows, and supporting plate 16 has formed lower casing.Minor face 24 1 sides of ceramic panel have been reserved ventilating opening 25.The fan 17 of ventilating opening inboard sucks air, make it by cooling duct and cooled region after, take heat out of heating system.Therefore, the element in the system can perhaps be conducted heat to cooling body 15 by the directly cooling of air stream, takes away heat by air stream from cooling body again.
In Fig. 3, the induction coil 30 of dish is housed in the magnetic field hair generator 14, a side of close ceramic panel is thermal insulation 32.Induction coil 30 is formed by bundle conductor 38 coiled coils.Cooling ribs 18 is connected the bottom of metal tray box, thereby forms cooling duct 19, and electromagnetic oven 10 has been passed along axis in the cooling duct.Supporting plate is screwed on the cooling ribs 18 with screw, so cooling duct 19 and bigger cooled region 28 have constituted the air duct of cooling body below together.
In Fig. 4, bundle conductor 38 is by youngster's root, and preferably five to nine is that seven leads 40 twist into one in the present embodiment.Every lead 40 is again by five to nine, is that seven seal wires 39 constitute in the present embodiment.Carry out insulation processing with conventional method between the every lead 40, for example wrap up with the thermal resistance varnish coat.The diameter of section of single wire 39 between 0.1 to 0.4mm, 0.2mm preferably.The seal wire of this diameter is applicable to the power frequency of 20kHz to 30kHz, for the electric current of other frequencies, should follow the basic value that following formula is determined the single wire diameter
The optimum value d of seal wire 39 diameter of sections between basic value D 1/4 to 3/4 between.Experiment finds that with the seal wire of such minor diameter, the power loss of induction coil will be greatly diminished.
Claims (8)
1. electromagnetic heating system is characterized in that: system is made of induction coil, air duct, the temperature infrared inductor that the lead of field generator for magnetic, specified diameter constitutes.
2. electromagnetic heating system according to claim 1, it is characterized in that: the bundle conductor of induction coil twists into twisted wire by 5 to 9 leads.
3. electromagnetic heating system according to claim 2, it is characterized in that: the diameter d of single wire is 1/4 to 3/4 of theoretical optimal value D.
4. electromagnetic heating system according to claim 2 is characterized in that: the diameter d of single wire between 0.1mm between the 0.4mm.
5. electromagnetic heating system according to claim 1, it is characterized in that: induction coil is installed under the ceramic panel, is provided with thermal insulation at induction coil near a side of ceramic panel, and induction coil is provided with cooling body and air duct away from a side of ceramic panel.
6. electromagnetic heating system according to claim 1 is characterized in that: the temperature infrared inductor is arranged under the induction coil.
7. electromagnetic heating system according to claim 6, it is characterized in that: the temperature infrared inductor does not contact with ceramic panel.
8. electromagnetic heating system according to claim 7, it is characterized in that: the temperature infrared inductor has the specific range of sensitivity, and its scope is the infrared radiation scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220584559 CN203219526U (en) | 2012-11-08 | 2012-11-08 | Electromagnetic heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220584559 CN203219526U (en) | 2012-11-08 | 2012-11-08 | Electromagnetic heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203219526U true CN203219526U (en) | 2013-09-25 |
Family
ID=49209026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220584559 Expired - Fee Related CN203219526U (en) | 2012-11-08 | 2012-11-08 | Electromagnetic heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203219526U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102932979A (en) * | 2012-11-08 | 2013-02-13 | 傅福兴 | Electromagnetic heating system |
-
2012
- 2012-11-08 CN CN 201220584559 patent/CN203219526U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102932979A (en) * | 2012-11-08 | 2013-02-13 | 傅福兴 | Electromagnetic heating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130925 Termination date: 20131108 |