CN108006966A - Electromagnetic induction heater and its method - Google Patents
Electromagnetic induction heater and its method Download PDFInfo
- Publication number
- CN108006966A CN108006966A CN201711095623.1A CN201711095623A CN108006966A CN 108006966 A CN108006966 A CN 108006966A CN 201711095623 A CN201711095623 A CN 201711095623A CN 108006966 A CN108006966 A CN 108006966A
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- tank body
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- induction heater
- diversion pipe
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- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 230000001464 adherent effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 4
- 238000003491 array Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000132179 Eurotium medium Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/04—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid
- F24H7/0408—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply
- F24H7/0433—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply the transfer medium being water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H2250/00—Electrical heat generating means
- F24H2250/08—Induction
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Induction Heating (AREA)
Abstract
Electromagnetic induction heater of the present invention and its method, propose that the structure equipped with labyrinth type heating path is improved in a kind of, by extending heating path to greatest extent, to improve heat transfer efficiency, relatively reduce tank body volume and floor space.A tank body is mainly included, electromagnetic coil is wound with the periphery of tank body, introducing port and export mouth for turning on heated medium are provided with tank body.Tank body has insulating layer and interior bucket；Portion is provided with multiple diversion pipes along tank body axial alignment within the inner barrel, and diversion pipe is arranged radially based on same center, and the through hole of adjacent guide pipe is staggered along tank body axial direction two side ends；Along tank body radially, between the inner wall and diversion pipe of interior bucket, be inserted with some groups of heat conduction grids.
Description
Technical field
The present invention proposes a kind of apparatus structure heated using high-frequency electromagnetic to liquid medium and its application method
Improve, be specifically adapted for the heating of conduction oil and oil storage heat accumulation, belong to electrically with fluid HVAC system design field.
Background technology
The industrial heat energy of most domestic still produces heat source using coal-fired, oil-fired steam boiler at present, increasingly severe
Under environmental protection index, per unit area yield energy consumption, policy and laws and regulations requirement, it is the heat-supplying mode that national policy is supported energetically that the coal of heat source, which changes electricity,.
Electric heat supply is not only a kind of safety and clean heat-supplying mode, while can also mitigate atmosphere pollution, operative employee is significantly increased
Make quality, the application of such clean energy resource will become inexorable trend.
Current relatively advanced heat-supplying mode favorably uses electromagnetic induction heating conduction oil, passes through more warm circulatory system control temperature
Degree, distributed with hot device, heat supply nearby is heated in groups, to substitute pipe network steam comprehensively, so that as efficient, environmentally friendly, energy saving, peace
Full heat source.
Such as the Chinese patent of following earlier application, Application No. CN201120037333.3, title is high-frequency electromagnetic hot water
Device, hot-water boiler, its major programme are that tank body uses stainless steel material, and heat-resistant insulating layer is enclosed in the outside of tank body, electromagnetic wire
Circle keeps certain gap installed in the outside of heat-resistant insulating layer, and with heat-resistant insulating layer.Water level sensor is installed in tank body
And be inserted into heating water, its water inlet pipe, outlet pipe penetrate the bottom of shell, and on tank body.At work, electromagnetic coil
High frequency electric sensing make tank body produce vortex and generate heat so as to flow through tank interior water progress heat temperature raising.Above-mentioned Shen
Please there are the shortcomings that have, the structure of (1) circulating water pipe is unreasonable with additionally arranging circuit, heating heating it is less efficient.(2) if reaching
Preferable heat source temperature, it is inevitable using circulating water pipe length in reducing flow velocity, extending as cost, it is necessary to which larger take up an area volume and area
Tank body, manufacture cost it is also just higher.(3) only with the radiation transferring heat energy from peripheral tank body, transmission efficiency is low, heating time
It is long.Say on the whole, the overall heat energy distribution of such scheme, transmission are unreasonable.
In view of this, it is special to propose present patent application.
The content of the invention
Electromagnetic induction heater of the present invention and its method, its object is to solve above-mentioned existing in the prior art ask
Inscribe and propose that the structure equipped with labyrinth type heating path is improved in a kind of, by extending heating path to greatest extent, to improve
Heat transfer efficiency, relatively reduce tank body volume and floor space.
At the same time, it is even more important that the electromagnetic induction heater that the application is proposed not is the pot for belonging to pressure vessel
Stove, thus from structural strength, material selection for it is just more flexible, cost is also relatively lower for manufacture, electrical control and safety
Performance can greatly improve.
For achieving the above object, the electromagnetic induction heater mainly includes：
One tank body,
Electromagnetic coil is wound with the periphery of tank body,
The introducing port and export mouth for turning on heated medium are provided with tank body.
It is in place of difference with the prior art, tank body has insulating layer and interior bucket；
Portion is provided with multiple diversion pipes along tank body axial alignment within the inner barrel, and it is radial that diversion pipe is based on same center
Arrangement, the through hole of adjacent guide pipe are staggered along tank body axial direction two side ends；
Along tank body radially, between the inner wall and diversion pipe of interior bucket, be inserted with some groups of heat conduction grids.
As above basic engineering structure is described, and insulating layer is heat-resistant insulating layer, and interior bucket selects electric conductive dustproof material, works as electricity
When magnetic coil produces high frequency magnetic field by high frequency electric, interior bucket made of metal is subject to sensing to produce vortex and generate heat rapidly, is situated between
Matter is heated in diversion pipe by adherent exchange, by kelvin effect, and temperature constantly rise is until reach requirement.
The heat conduction grid being plugged between the inner wall of interior bucket and diversion pipe, can pass to water conservancy diversion by thermal energy is directly adherent
Medium in pipe, the supplementary means of this contact heat transfer are greatly improved the medium efficiency of heating surface.
Most important improvement is characterized in that the diversion pipe of axial alignment is based on same center and is arranged in shape is penetrated, adjacent guide pipe
Through hole be staggered along tank body axial direction two side ends so that medium is only capable of along identical single direction, followed by all water conservancy diversion
Whole length of pipe, this labyrinth type flow-guiding structure, can extend heating path to greatest extent, medium heating is quick, heating
Uniformly, so that larger save electric power, effectively reduce energy consumption.
More preferable improvement project is the tank body generally cylinder, several diversion pipe concentrics, equidistantly
Arrangement.I.e. whole diversion pipes be in concentric circles arrangement mode, medium along tank body axial direction, reciprocally connect flows through diversion pipe shape back and forth
Into circulating path, can fully be absorbed to the thermal energy that interior bucket passes over.
The inclined at an angle of heat conduction grid can be plugged in water conservancy diversion pipe outer wall so that the medium inside diversion pipe produces turbulent flow
And more uniformly it is heated.
A further improvement is that on the tank body, introducing port, export mouth are alternately set along its axial direction both ends, so that
Obtain medium and requirement is reached by heating step by step, heating in tank interior space is flowed through.
Under conditions of tank body volume and floor space are certain, the designing scheme for realizing most long heating path is export mouth
On the longitudinal center line of tank body, introducing port is located at tank body longitudinal center line distalmost end.I.e. medium is from closest to interior bucket inner wall
Diversion pipe enter tank body, diametrically, progressively flow through each diversion pipe from outside to inside, finally by axial centre flow out tank
Body.This heating path is most long and progressively heat temperature raising, efficiency of heating surface highest.
For discharge it is initial import medium when, remaining air in tank body, on the tank body, export mouth side is provided with and puts
Air valve interface.
A kind of new heating means are realized using above-mentioned improved electromagnetic induction heater, that is, pass through electromagnetic coil
It is adherent to transmit heat to tank interior space, after medium imports interior bucket, flow through vertically by the multiple diversion pipes of tandem array successively
And the circulation route formed；
By heat conduction grid, the heat imported to the medium transmission inside diversion pipe from interior bucket inner wall.
Improve heat transfer efficiency for auxiliary, can from heat conduction grid obliquely, adherent medium into diversion pipe transmit heat
Amount, promotes medium to form local turbulence.
To obtain longest thermally conductive pathways, medium export mouth is arranged on the longitudinal center line of tank body, introducing port is set
It is placed in the distalmost end apart from tank body longitudinal center line.
Before electromagnetic coil imports electric current, after medium is imported tank body, deflated by the vent valve for being arranged on a high position；Wait to be situated between
After matter fills, vent valve is closed；
Medium in integrally heating pipeline after circulation is formed, then is connected electromagnetic coil and heated.
In conclusion electromagnetic induction heater of the present invention and its method have the following advantages：
1st, electromagnetic induction heater is not the affiliated management and control pressure vessel of steam boiler, in structural strength, material selection
It is relatively easy to promote, manufacture advantage of lower cost, electrical control and security performance greatly improve.It is more suitable for by the device pair
Cold conditions heat transfer conduction oil is heated, and is controlled temperature by more warm circulatory systems, is realized that distribution is supplied nearby in groups with hot device
Heat heating, to substitute pipe network steam, becomes efficient, environmentally friendly, energy saving, safe heat source.
2nd, using labyrinth type heat conduction pipeline, heating path is extended to greatest extent, heat transfer efficiency is higher, with identical rule
The heat-conducting oil furnace of lattice, which is compared, can reduce tank body volume and floor space.
3rd, internal sealing and circulating mode is taken so that medium heat conduction oil avoids contacting oxygen under high-temperature liquid state and occurring old
Change, especially suitable for conduction oil, it is ensured that conduction oil will not in advance be scrapped and increased with oily cost.
4th, medium (such as conduction oil) is heated evenly in heat conduction pipeline and realizes dynamic circulation turbulent erosion.
If heat conduction pipeline the 5, is used stainless steel again, coking is less susceptible to, reduces the workload of periodic cleaning；
6th, medium (such as conduction oil) is heated and insulation, oil storage is integrated, save manufacture cost.
Brief description of the drawings
The application is described further below in conjunction with attached drawing；
Fig. 1 is the structure diagram of the electromagnetic induction heater；
Fig. 2 is the axial cross-sectional views of the device；
Fig. 3 is the radial section schematic diagram of the device；
As shown in Figure 1 to Figure 3, tank body 1, electromagnetic coil 2, introducing port 11, export mouth 12, insulating layer 13, interior bucket 14, water conservancy diversion
Pipe 15, through hole 16, heat conduction grid 17, vent valve interface 18.
Embodiment
Embodiment 1, is described in further detail the present invention with reference to embodiment.
As shown in Figure 1, the electromagnetic induction heater can be used for the heating and insulation oil storage of conduction oil, it includes tank
Body 1, upper and lower 2 groups of electromagnetic coils 2 are wound with the periphery of tank body 1.
As shown in Figures 2 and 3, the tank body 1 generally cylinder, it is by 14 groups of enclosed insulating layer 13 and interior bucket
Into.
Multiple diversion pipes 15 along 1 axial alignment of tank body are internally provided with interior bucket 14,15 concentric of diversion pipe, equidistantly
Arrangement, i.e., the longitudinal center line based on tank body 1 are arranged radially.The through hole 16 of adjacent guide pipe 15 is along the axial both sides of tank body 1
End is alternately set；Arrow instruction in figure, conduction oil flow through the path and direction of diversion pipe 15.
For turning on the introducing port 11 and export mouth 12 of conduction oil, along the axial both ends of tank body 1, alternately set, wherein leading
On the longitudinal center line of tank body 1, introducing port 11 is located at the distalmost end away from 1 longitudinal center line of tank body for outlet 12.That is conduction oil
From outermost, i.e. closest to diversion pipe 15 is entered at 14 inner wall of interior bucket, be radially recycled to longitudinal center line step by step, finally from
Export mouth 12 discharges tank body 1.During the flowing through of each diversion pipe 15, conduction oil along tank body 1 it is axial complete it is once unidirectional
Flowing.But the axial flow direction contrast in adjacent 2 diversion pipes 15, and so on.
Along tank body 1 radially, between 14 inner wall of interior bucket and multiple diversion pipes 15, be inserted with 2 groups of heat conduction grids 17 up and down, lead
It is in a slanted angle between heat grate 17 and diversion pipe 15.
In 12 side of export mouth, 2 groups of vent valve interfaces 18 are provided with.
Using such as above-mentioned electromagnetic induction heater, the present invention also realizes a kind of new electromagnetic-induction heating method：
Heat is transmitted to 1 inner space of tank body by the way that electromagnetic coil 2 is adherent, after conduction oil is imported into interior bucket 14, vertically
Followed by the circulation route formed by the multiple diversion pipes 15 of tandem array, finally by being arranged on 1 longitudinal center line of tank body
Export mouth 12 flow out.Conduction oil enters diversion pipe 15 from outermost, i.e. closest to the introducing port 11 at 14 inner wall of interior bucket, progressively
Ground is radially recycled to longitudinal center line, finally discharges tank body 1 from export mouth 12.During the flowing through of each diversion pipe 15,
Conduction oil completes an one-way flow along tank body 1 is axial.But the just phase of the axial flow direction in adjacent 2 diversion pipes 15
Instead, and so on.
By heat conduction grid 17, the heat imported to the medium transmission inside diversion pipe 15 from 14 inner wall of interior bucket.Heat conduction grid
17 obliquely, the adherent medium into diversion pipe 15 transmits heat, promotes medium to form local turbulence.
After medium is imported tank body 1, deflated by the vent valve for being arranged on a high position；After medium fills, vent valve is closed；It is situated between
Matter in integrally heating pipeline after circulation is formed, then is connected electromagnetic coil 2 and heated.
Specific operating process is as follows：
1st, cold conditions conduction oil is pumped into from introducing port 11, by deflating by hand positioned at high-order vent valve, treats that conduction oil fills
After tank body 1, vent valve is closed；
2nd, after (can be all closed by nitrogen charging) forms circulation to conduction oil in total system pipeline, 2 groups are connected
Electromagnetic coil 2 carries out heating with full power conduction oil；
3rd, the labyrinth type heating path that conduction oil is formed in heat conducting pipe 15 by through hole 16 up and down staggeredly, adherent friendship
Change, kelvin effect heat；
4th, heat conduction grid 17 forms local turbulence by adherent transmission high temperature to conduction oil and heats up and thermally equivalent；
When the 5th, reaching more consistent setting operating temperature into and out of oily temperature measuring point, one of electromagnetic coil 2 can be closed；
When the 6th, reaching dynamic thermostatic stable state, whole electromagnetic coils 2 are closed；
7th, keep operating temperature and sealing and circulating state, it is necessary to when can restart electromagnetic coil 2, carry out intermittent heating or
Carry out mending temperature using the low power consumption stage；
When the 8th, without heat, circulation pump group is closed.
As described above, given plan content in conjunction with the accompanying drawings and embodiments, can derive similar technical solution.But
Every content without departing from technical solution of the present invention, the technical spirit according to the present invention are made above example any simple
Modification, equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of electromagnetic induction heater, includes tank body (1), electromagnetic coil (2) is wound with the periphery of tank body (1),
The introducing port (11) and export mouth (12) for turning on heated medium are provided with tank body (1),
It is characterized in that：Tank body (1) has insulating layer (13) and interior bucket (14)；
Multiple diversion pipes (15) along the axial concentric arrays of tank body (1), diversion pipe (15) base are internally provided with interior bucket (14)
It is arranged radially in same center, the through hole (16) of adjacent guide pipe (15) is staggered along the axial two side ends of tank body (1)；
Along tank body (1) radially, between interior bucket (14) inner wall and diversion pipe (15), be inserted with some groups of heat conduction grids (17).
2. electromagnetic induction heater according to claim 1, it is characterised in that：Tank body (1) the generally cylinder
Body, equidistantly several diversion pipe (15) concentrics, arrangement.
3. electromagnetic induction heater according to claim 1 or 2, it is characterised in that：Heat conduction grid (17) and diversion pipe
(15) inclined angle between.
4. electromagnetic induction heater according to claim 1 or 2, it is characterised in that：On the tank body (1), along it
Axial both ends alternately set introducing port (11), export mouth (12).
5. electromagnetic induction heater according to claim 4, it is characterised in that：Export mouth (12) is located at tank body (1)
On longitudinal center line, introducing port (11) is located at tank body (1) longitudinal center line distalmost end.
6. electromagnetic induction heater according to claim 1 or 2, it is characterised in that：On the tank body (1), export
Mouth (12) side is provided with vent valve interface (18).
7. the heating means of application electromagnetic induction heater as described in claim 1 to 6, it is characterised in that：Pass through electromagnetic wire
Circle (2) is adherent to transmit heat to tank body (1) inner space, after medium imports interior bucket (14), flows through held in the mouth by head and the tail successively vertically
The circulation route for connecing multiple diversion pipes (15) and being formed；
The heat imported by heat conduction grid (17), the medium transmission to diversion pipe (15) inside from interior bucket (14) inner wall.
8. electromagnetic-induction heating method according to claim 7, it is characterised in that：Heat conduction grid (17) obliquely, it is adherent
Medium into diversion pipe (15) transmits heat, promotes medium to form local turbulence.
9. electromagnetic-induction heating method according to claim 8, it is characterised in that：Medium export mouth (12) is arranged at tank
On the longitudinal center line of body (1), introducing port (11) is arranged at the distalmost end apart from tank body (1) longitudinal center line.
10. electromagnetic-induction heating method according to claim 9, it is characterised in that：After medium is imported tank body (1), by
The vent valve for being arranged on a high position is deflated；After medium fills, vent valve is closed；
Medium in integrally heating pipeline after circulation is formed, then is connected electromagnetic coil (2) and heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711095623.1A CN108006966A (en) | 2017-11-09 | 2017-11-09 | Electromagnetic induction heater and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711095623.1A CN108006966A (en) | 2017-11-09 | 2017-11-09 | Electromagnetic induction heater and its method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108006966A true CN108006966A (en) | 2018-05-08 |
Family
ID=62051318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711095623.1A Pending CN108006966A (en) | 2017-11-09 | 2017-11-09 | Electromagnetic induction heater and its method |
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| Country | Link |
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| CN (1) | CN108006966A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109938568A (en) * | 2018-12-21 | 2019-06-28 | 台州卓标企业管理咨询有限公司 | A kind of multi-function metal ground cushion |
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| CN207438916U (en) * | 2017-11-09 | 2018-06-01 | 青岛万龙智控科技有限公司 | Electromagnetic induction heater |
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2017
- 2017-11-09 CN CN201711095623.1A patent/CN108006966A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| CN1844777A (en) * | 2006-05-11 | 2006-10-11 | 杨杰 | Electromagnetic water heater with modularized structure |
| JP2012132614A (en) * | 2010-12-21 | 2012-07-12 | Yutaka Giken Co Ltd | Heat exchanger |
| CN202692432U (en) * | 2012-07-17 | 2013-01-23 | 孔祥斌 | Fluid electromagnetic heating apparatus, household circulation heating system and heat conduction oil circulating system |
| CN103759406A (en) * | 2014-01-24 | 2014-04-30 | 陈国良 | Single-tank, double-pipe and bidirectional electric heating device and air energy instant electric water heater |
| CN204202173U (en) * | 2014-10-20 | 2015-03-11 | 常州市凯凯照明电器有限公司 | A kind of great-power electromagnetic heater |
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| CN109938568A (en) * | 2018-12-21 | 2019-06-28 | 台州卓标企业管理咨询有限公司 | A kind of multi-function metal ground cushion |
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Effective date of registration: 20200528 Address after: 310058 Xihu District, Zhejiang, Yuhang Tong Road, No. 866, No. Applicant after: ZHEJIANG University Applicant after: QINGDAO WANLONG INTELLIGENT TECHNOLOGY Co.,Ltd. Applicant after: QINGDAO WANLONG HIGH-TECH GROUP Co.,Ltd. Address before: 266000 Shandong province Qingdao City, Zhengzhou Road No. 3 Applicant before: QINGDAO WANLONG INTELLIGENT TECHNOLOGY Co.,Ltd. Applicant before: QINGDAO WANLONG HIGH-TECH GROUP Co.,Ltd. |
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Application publication date: 20180508 |