CN204201908U - Microwave gas cracker - Google Patents
Microwave gas cracker Download PDFInfo
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- CN204201908U CN204201908U CN201420498022.0U CN201420498022U CN204201908U CN 204201908 U CN204201908 U CN 204201908U CN 201420498022 U CN201420498022 U CN 201420498022U CN 204201908 U CN204201908 U CN 204201908U
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- cavity
- magnetron
- microwave
- plasma generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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Abstract
The utility model provides a kind of microwave gas cracker, for treatment of!medical waste, it comprises a stabilized power source, magnetron, excitation cavity, electromagnet, high steady signal source, four end circulators, waveguide switch, plasma generator, gas flow adjuster and absorbing load, stabilized power source, magnetron, electromagnet and excitation cavity form a microwave energy generator, provide the microwave power needed for plasma generation; High steady signal source is for providing stable 2450MHz microwave signal and injecting magnetron by four end circulators, and the frequency of oscillation of magnetron by institute's Injection Signal FREQUENCY CONTROL, and exports microwave energy to described plasma generator; Waveguide switch is arranged on the 3rd of described four end circulators the between port and plasma generator, for the conversion of microwave energy power output, gas flow adjuster is connected with described plasma generator, for regulating the gas flow entering plasma generator; Magnetron is the magnetron of a low apparent quality factor.
Description
Technical field
The utility model relates to microwave equipment technical field, in particular to a kind of microwave gas cracker of medical waste microwave processing equipment, for landfill flare exhausts purified treatment.
Background technology
Current research both domestic and external finds, in the problem of curbing environmental pollution, microwave technology has the advantages such as energy consumption is low, the reaction time is short, simple to operate, reactant productive rate increases, turn waste into wealth, and causes the research enthusiasm of scientific research institution of various countries and enterprise.
Microwave plasma torch is a kind of very important plasma generation form, plasma is produced by microwave electromagnetic energy, compare electrode discharge, there is not the evaporative emission problem of electrode, the span of plasma is not by the restriction of electrode gap, and the plasma produced is separated with energy source, can realize the open plasma of atmospheric pressure.These advantages make microwave plasma more and more extensive in commercial Application.
Tail gas after plasma flare system disposal of refuse burning, effectively can ionize pernicious gases such as bioxin in tail gas, eliminates the pernicious gas composition reduced in waste gas, reduces Biohazard Waste and burns the secondary pollution caused air.But microwave plasma body technique and promotion and application, be subject to the impact of microwave energy generator on microwave plasma steady operation, and efficiency and reliability aspect exist certain problem.Such as, plasma flare system microwave energy is unstable, and majority all needs to regulate plasma generator impedance phase coupling by three screw tuners, and microwave efficiency is low; Power density is not concentrated, and cracked gas is relatively single, cannot regulate according to gas and gas flow change autonomous power.
Utility model content
The utility model object is to provide a kind of novel microwave gas cracker, solves the cleaning harmful gas problem that waste incineration produces, and microwave plasma system efficiency is low, plasma torch instability problem to adopt injection frequency locking technology to solve.
Above-mentioned purpose of the present utility model is realized by the technical characteristic of independent claims, and dependent claims develops the technical characteristic of independent claims with alternative or favourable mode.
For reaching above-mentioned purpose, the utility model adopt technical scheme as follows:
A kind of microwave gas cracker, comprises a stabilized power source, magnetron, excitation cavity, electromagnet, high steady signal source, four end circulators, waveguide switch, plasma generator, gas flow adjuster and absorbing load, wherein:
Described stabilized power source is as a microwave power supply, be connected with described magnetron, described magnetron and electromagnet are fixed on described excitation cavity, and described stabilized power source, magnetron, electromagnet and excitation cavity form a microwave energy generator, provide the microwave power required for plasma generation;
Described four end ring shape utensils have four ports, first port is connected with the steady signal source of described height, second port is connected with described excitation cavity, and the 3rd port is connected with described plasma generator via described waveguide switch, and the 4th port is connected with described absorbing load;
Described absorbing load is for absorbing reflection power;
The steady signal source of described height is for providing stable 2450MHz microwave signal and by described four end circulators, 2450MHz microwave signal being injected described magnetron, the frequency of oscillation of this magnetron by institute's Injection Signal FREQUENCY CONTROL, and exports microwave energy to described plasma generator;
Between the 3rd port that described waveguide switch is arranged on described four end circulators and described plasma generator, for the conversion of microwave energy power output, by magnetron export power from TE10 patten transformation to the mode of operation TE11 of plasma generator;
Described gas flow adjuster is connected with described plasma generator, for regulating the gas flow entering plasma generator;
Described magnetron is the magnetron of a low apparent quality factor, and its apparent quality factor value is 100 ~ 120, and frequency is at 2450MHz ± 2.5MHz, continuous wave output power >=15kW.
In further embodiment, be also provided with a directional coupler between the 3rd end of described four end circulators and described waveguide switch, this directional coupler is also connected with a power detector, for monitoring input power and the reflection power of microwave energy generator.
In further embodiment, the steady signal source of described height is a solid-state injection source, its injecting power >=200W, and frequency is 2450MHz and power stability is ± 1W.
In further embodiment, ripple factor≤1% of described stabilized power source.
In further embodiment, described excitation cavity is standard BJ-22 type excitation cavity.
From above the technical solution of the utility model, the microwave gas cracker that the utility model proposes, compared with prior art, its remarkable result is:
1, gas pyrolysis device of the present utility model adopts and injects frequency locking technology, realizes microwave energy generator firm power and exports;
2, adopt four end circulator designs, effectively weaken feedback power and microwave energy generator is had an impact, ensure the steady operation of microwave energy generator;
3, adopt and inject frequency locking technology and four end circulators as the power source of microwave plasma flare and energy output system, microwave energy utilization ratio is high, and plasma flare is stablized, and is convenient to commercial introduction application;
4, gas flow adjuster according to air inflow from main regulation microwave power, can improve microwave energy utilization ratio on the one hand, is beneficial to the steady operation of plasma flare on the other hand;
5, adopt microwave energy to carry out gas cracking, gas purification degree can be improved, effectively control the secondary pollution that waste incineration causes.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model one embodiment microwave gas cracker.
Fig. 2 is the structural representation of the microwave gas cracker of another embodiment of the utility model.
Fig. 3 is the scheme of installation of excitation cavity, magnetron and electromagnet in earlier figures 1, Fig. 2 embodiment.
Fig. 4 is an example arrangement schematic diagram of magnetron in Fig. 1 or 2 embodiments.
Fig. 5 is the structural representation of cavity combination in Fig. 4 embodiment.
Fig. 6 is the structural representation of cavity combination other direction in Fig. 4 embodiment.
Fig. 7 is the structural representation of output window combination in Fig. 4 embodiment.
Fig. 8 is the structural representation combined that goes between in Fig. 4 embodiment.
Detailed description of the invention
In order to more understand technology contents of the present utility model, institute's accompanying drawings is coordinated to be described as follows especially exemplified by specific embodiment.
Figure 1 shows that the structural representation of the utility model one embodiment microwave gas cracker, wherein, a kind of microwave gas cracker, comprises a stabilized power source 101, magnetron 102, excitation cavity 103, electromagnet 104, high steady signal source 105, four end circulator 106, waveguide switch 107, plasma generator 108, gas flow adjuster 109 and absorbing load 110.
In the present embodiment, aforementioned stabilized power source 101 is as a microwave power supply, be connected with magnetron 102, as shown in Figure 3, magnetron 102 and electromagnet 104 are fixed on excitation cavity 103, stabilized power source 101, magnetron 102, electromagnet 103 and excitation cavity 104 form a microwave energy generator, provide the microwave power required for plasma generation.
Excitation cavity 103 is standard BJ-22 type excitation cavity.
In the present embodiment, described stabilized power source 101 is the microwave power supply of magnetron 102, its preferred ripple factor (i.e. stability)≤1%.
Aforementioned four end circulators 106 have four ports, as shown in Figure 1, first end is connected with the steady signal source 105 of height, and the second end is connected with excitation cavity 103,3rd end is connected with plasma generator 108 via waveguide switch 107, and the 4th end is connected with absorbing load 110.In the present embodiment, prior absorbent load with 110 in absorption reflection power.
High steady signal source 105 is for providing stable 2450MHz microwave signal and by four end circulators 106,2450MHz microwave signal being injected magnetron 102, the frequency of oscillation of this magnetron 102 is by institute's Injection Signal FREQUENCY CONTROL, and export microwave energy to plasma generator 108, with activated plasma.
In the present embodiment, the stable 2450MHz microwave signal that the steady signal source of aforementioned height 105 provides is a continuous wave, and as preferred embodiment, high steady signal source 105 is a solid-state injection source, its injecting power >=200W, frequency is 2450MHz and power stability is ± 1W.
As shown in Figure 1, aforementioned microwave energy generator (stabilized power source 101, magnetron 102, excitation cavity 103, electromagnet 104) and high stable signal source 105, four end circulator 106, absorbing load 110 form an injection frequency locking magnetron.
Waveguide switch 107 is arranged between the 3rd end of four end circulators 106 and plasma generator 108, for the conversion of microwave energy power output, by magnetron 102 export power from TE10 patten transformation to the mode of operation TE11 of plasma generator 108.
In the present embodiment, These gases flow regulator 109 is connected with plasma generator 108, for regulating the gas flow entering plasma generator.
The magnetron 102 of the present embodiment is the magnetron of a low apparent quality factor, and its apparent quality factor value is 100 ~ 120, and frequency is at 2450MHz ± 2.5MHz, continuous wave output power >=15kW.Be illustrated in figure 4 an example of low apparent quality factor magnetron, will illustrate below.Certainly, this structure listed by the present embodiment is unlikely to be construed as limiting the utility model, and the utility model also can adopt the magnetron of other structures on existing market, as long as its apparent quality factor, frequency range and power output meet aforementioned condition.
Aforementioned magnetron 102 adopts the magnetron of 2450MHz, and such as: 5KW/2450MHz injects frequency locking magnetron, 15KW/2450MHz injects frequency locking magnetron, and 20KW/2450MHz injects frequency locking magnetron, and 30KW/2450MHz injects frequency locking magnetron.The power of the magnetron selected by these is different, and the density of the plasma that its plasma generator produces has an impact.
Magnetron shown in following Fig. 4 embodiment is the magnetron of 15KW/2450MHz.
Be illustrated in figure 2 the structural representation of the microwave gas cracker of another embodiment of the utility model, wherein, microwave gas cracker, comprises a stabilized power source 201, magnetron 202, excitation cavity 203, electromagnet 204, high steady signal source 205, four end circulator 206, waveguide switch 207, plasma generator 208, gas flow adjuster 209 and absorbing load 210.
With reference to the embodiment shown in figure 1 and the above-mentioned explanation to each parts, stabilized power source 201 in the present embodiment, magnetron 202, excitation cavity 203, electromagnet 204, high steady signal source 205, four end circulator 206, waveguide switch 207, plasma generator 208, gas flow adjuster 209 and absorbing load 210, it acts on, function is identical with Fig. 1 embodiment with connected mode.
More above-mentioned Fig. 1 embodiment, in the present embodiment, a directional coupler 211 is also provided with between 3rd end of described four end circulators 206 and described waveguide switch 207, this directional coupler 211 is also connected with a power detector 212 (commercial), for monitoring input power and the reflection power of aforementioned microwave energy generator.
As shown in Figure 4, magnetron (102,103) comprises cavity combination 1, output window combination 2, lead-in wire combination 3 and radiator 4.
As Fig. 5, shown in composition graphs 6, cavity combination 1 forms by with lower part: circular cylindrical cavity 1a; Be positioned at multiple cavity fin 1b (as Fig. 5,6) of the also distribution in flap of circular cylindrical cavity, the waterway structure of cavity fin forms V-type Waterway cooling structure; Be arranged on the water collar 1c of circular cylindrical cavity periphery, in water collar, be provided with water proof ring 1d with holes around described circular cylindrical cavity; Be arranged on the inner two ends of circular cylindrical cavity, large and small every type band (greatly every type band 1e, septulum type band 1f) for increasing pattern segmentation degree, be positioned at the periphery of septulum type band 1f every type band 1e greatly and there is a gap (as Fig. 6); Insert the water pipe 1g injecting and discharge in described water collar and for cooling water; And the output antenna 1h be connected on cavity fin.
One end that described output window combination 2 and cavity combines 1 is connected and forms hermetically-sealed construction, and the other end of described output antenna 1h is positioned at described output window and combines the inside of 2 and do not contact the inwall that output window combines 2.
Other one end of cavity combination 1 is welded with described lead-in wire combination 3, and described lead-in wire combination 3 is welded with radiator 4 away from the position of cavity combination 1.
As optional embodiment, lead-in wire combination 3 and output window combines 2 combine 1 respectively at cavity two ends with big current Welding, by blast pipe sealed-off after being vented, and with high temperature soldering, radiator 4 being welded on lead wire set and closing.
As shown in Figure 5 and Figure 6, large and small every type belt surface silver-plated after weld with cavity 2a.Export antenna 2h to be welded with cavity 1a by silver-copper brazing alloy.Water proof ring 1d is welded between cavity 1a and water collar 1c, and water collar 1c is welded on outside cavity 1a, and water pipe 1g is welded in the hole of water proof ring 1d.
As shown in Figure 5 and Figure 6, as optional embodiment, described cavity fin 1b is being formed with slot along the inside of described flap distribution arrangement, slot between described cavity fin and described water collar form water cooling passageway and are used for dispelling the heat to magnetron, and the slot between neighboring chambers fin 1b forms described V-type Waterway cooling structure.
As shown in Figure 6, composition graphs 4 and Fig. 5, described water pipe 1g comprises water inlet pipe 1g-1 and outlet pipe 1g-2, and water inlet pipe 1g-1 to insert in described water collar 1c and extends through described water proof ring 1d, and described outlet pipe 1g-2 inserts described water collar 1c and extends inwardly to the position being no more than described water proof ring.Design like this, can ensure sufficient cooling water circulation, strengthens the effect of water-cooled.
As preferred embodiment, shown in figure 5 and Fig. 6, for exporting antenna 1h and the spacing 1e greatly every type band, export antenna 1h and the gap greatly every type band 1e, this distance controlling is when 0mm ~ 0.4mm, less on the impact of apparent quality factor (i.e. Qe value), and the possibility of mode hopping is smaller.
As preferred embodiment, as shown in Figure 5, the distance value greatly between type band 1e and septulum type band 1f controls, in certain scope, have larger impact to the performance of magnetron, especially centre frequency and situation of easily striking sparks.Find through a large amount of test datas, when the clearance distance greatly between type band 1e and septulum type band 1f controls between 0.7mm ~ 0.8mm, meet the performance requirement of magnetron and the requirement of apparent quality factor.
For strengthening the delivery efficiency of microwave energy, adopt axial antenna export structure in the present embodiment, as preferred embodiment, the diameter value of described output antenna is at 4.5mm ~ 5.5mm, and described output antenna is stretching out the height value of described cavity at 39mm ~ 41mm.Test shows, utilizes the output antenna of this diameter range and altitude range, can ensure the delivery efficiency of microwave energy, and less on the impact of apparent quality factor.
As shown in Figure 7, in the present embodiment, described output window combination 2 comprises lid 2a and output window 2b, output window 2b is that ceramic material becomes a U-shape structure, the opening of this U-shaped structure is connected with lid 2a, and described lid 2a and subordinate's boots 5 are connected to form hermetically-sealed construction, described in composition graphs 1, one end of described output antenna 1h is connected with cavity fin 1b, and its other end stretches into the open interior of this U-shaped structure.
As shown in Figure 8, in the present embodiment, described lead-in wire combination 3 comprises lead wire lever 3a, shielding cap 3b, filament 3c, higher level's boots 3d, chokes cylinder 3e, support cylinder 3f, location porcelain 3g, porcelain cylinder 3h, upper cover 3i and blast pipe 3j, wherein: described shielding cap 3b, filament 3c, higher level's boots 3d, chokes cylinder 3e, support cylinder 3f, location porcelain 3g, porcelain cylinder 3h, upper cover 3i around described lead wire lever 3a arrange and centered by this lead wire lever 3a line, described filament 3c is between two shielding cap 3b, a described shielding cap 3b is stuck on described higher level's boots 3d, the opposite side of higher level's boots 3d fixedly mounts chokes cylinder 3e successively, support cylinder 3f and be positioned at the location porcelain 3g of its inside, described porcelain cylinder 3h is connected with support cylinder 3f, described upper cover 3i is positioned at the other end of porcelain cylinder 3h, described blast pipe 3j stretches out described upper cover 3i.
As optional embodiment, upper cover 3i silver-copper brazing alloy is welded on porcelain cylinder 3h upper end; Blast pipe 3j silver-copper brazing alloy is welded in the hole of upper cover 3i; Support that cylinder 3f silver-copper brazing alloy is welded in the lower end of porcelain cylinder 3h, its other end silver-copper brazing alloy and upper pole shoe 3d weld together; Be positioned at and support that cylinder 3f is inner, it is inner that filament 3c argon arc welding is welded on shielding cap 3b, is positioned at the lower end of pole shoe 3d.
Although the utility model with preferred embodiment disclose as above, so itself and be not used to limit the utility model.Have in the utility model art and usually know the knowledgeable, not departing from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is when being as the criterion depending on those as defined in claim.
Claims (9)
1. a microwave gas cracker, is characterized in that, comprises a stabilized power source, magnetron, excitation cavity, electromagnet, high steady signal source, four end circulators, waveguide switch, plasma generator, gas flow adjuster and absorbing load, wherein:
Described stabilized power source is as a microwave power supply, be connected with described magnetron, described magnetron and electromagnet are fixed on described excitation cavity, and described stabilized power source, magnetron, electromagnet and excitation cavity form a microwave energy generator, provide the microwave power required for plasma generation;
Described four end ring shape utensils have four ports, first port is connected with the steady signal source of described height, second port is connected with described excitation cavity, and the 3rd port is connected with described plasma generator via described waveguide switch, and the 4th port is connected with described absorbing load;
Described absorbing load is for absorbing reflection power;
The steady signal source of described height is for providing stable 2450MHz microwave signal and by described four end circulators, 2450MHz microwave signal being injected described magnetron, the frequency of oscillation of this magnetron by institute's Injection Signal FREQUENCY CONTROL, and exports microwave energy to described plasma generator;
Between the 3rd port that described waveguide switch is arranged on described four end circulators and described plasma generator, for the conversion of microwave energy power output, by magnetron export power from TE10 patten transformation to the mode of operation TE11 of plasma generator;
Described gas flow adjuster is connected with described plasma generator, for regulating the gas flow entering plasma generator;
Described magnetron is the magnetron of a low apparent quality factor, and its apparent quality factor value is 100 ~ 120, and frequency is at 2450MHz ± 2.5MHz, continuous wave output power >=15kW.
2. microwave gas cracker according to claim 1, it is characterized in that, a directional coupler is also provided with between 3rd end of described four end circulators and described waveguide switch, this directional coupler is also connected with a power detector, for monitoring input power and the reflection power of microwave energy generator.
3. microwave gas cracker according to claim 1, is characterized in that, the steady signal source of described height is a solid-state injection source, its injecting power >=200W, and frequency is 2450MHz and power stability is ± 1W.
4. microwave gas cracker according to claim 1, is characterized in that, ripple factor≤1% of described stabilized power source.
5. microwave gas cracker according to claim 1, is characterized in that, described excitation cavity is standard BJ-22 type excitation cavity.
6. microwave gas cracker according to claim 1, is characterized in that, described magnetron comprises cavity combination, output window combination, lead-in wire combination and radiator, wherein:
Described cavity combination forms by with lower part: circular cylindrical cavity; Be positioned at multiple cavity fins of the also distribution in flap of circular cylindrical cavity, the waterway structure of cavity fin forms V-type Waterway cooling structure; Be arranged on the water collar of circular cylindrical cavity periphery, in water collar, be provided with water proof ring with holes around described circular cylindrical cavity; Be arranged on the inner two ends of circular cylindrical cavity, large and small every type band for increasing pattern segmentation degree, be positioned at the periphery of septulum type band every type band greatly and there is a gap; Insert the water pipe injecting and discharge in described water collar and for cooling water; And the output antenna be connected on cavity fin;
The combination of described output window is connected with one end that cavity combine and forms hermetically-sealed construction, and the other end of described output antenna is positioned at inside that described output window combines and does not contact the inwall that output window combines;
Other one end and the described lead-in wire Combination Welding of cavity combination, the described lead wire set position of combining away from cavity of closing is welded with radiator.
7. microwave gas cracker according to claim 6, it is characterized in that, described cavity fin is being formed with slot along the inside of described flap distribution arrangement, slot between described cavity fin and described water collar form water cooling passageway, and the slot between neighboring chambers fin forms described V-type Waterway cooling structure;
Described water pipe comprises water inlet pipe and outlet pipe, and water inlet pipe to insert in described water collar and extends through described water proof ring, and described outlet pipe inserts described water collar and extends inwardly to the position being no more than described water proof ring;
Described output window combination comprises lid and output window, output window is that ceramic material becomes a U-shape structure, the opening of this U-shaped structure is connected with lid, described lid and subordinate's boots are connected to form hermetically-sealed construction, one end of described output antenna is connected with cavity fin, and its other end stretches into the open interior of this U-shaped structure;
Described lead-in wire combination comprises lead wire lever, shielding cap, filament, higher level's boots, chokes cylinder, support cylinder, location porcelain, porcelain cylinder, upper cover and blast pipe, wherein: described shielding cap, filament, higher level's boots, chokes cylinder, support cylinder, location porcelain, porcelain cylinder, upper cover around described lead wire lever arrange and centered by this lead wire lever line, described filament is between two shielding caps, a described shielding cap is stuck on described higher level's boots, the opposite side of higher level's boots fixedly mounts chokes cylinder successively, support cylinder and be positioned at the location porcelain of its inside, described porcelain cylinder is connected with support cylinder, described upper cover is positioned at the other end of porcelain cylinder, stretch out described upper cover in the hole that described blast pipe silver-copper brazing alloy is welded in upper cover.
8. microwave gas cracker according to claim 6, is characterized in that, described large distance value between type band and septulum type band is at 0.7mm ~ 0.8mm.
9. microwave gas cracker according to claim 6, it is characterized in that, the diameter value of described output antenna is at 4.5mm ~ 5.5mm, and described output antenna is stretching out the height value of described cavity at 39mm ~ 41mm, and described output antenna is 0mm ~ 0.4mm with the distance values greatly every type band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420498022.0U CN204201908U (en) | 2014-08-29 | 2014-08-29 | Microwave gas cracker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420498022.0U CN204201908U (en) | 2014-08-29 | 2014-08-29 | Microwave gas cracker |
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| CN204201908U true CN204201908U (en) | 2015-03-11 |
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| CN201420498022.0U Withdrawn - After Issue CN204201908U (en) | 2014-08-29 | 2014-08-29 | Microwave gas cracker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235859A (en) * | 2014-08-29 | 2014-12-24 | 南京三乐微波技术发展有限公司 | Microwave gas cracking device |
| CN109764368A (en) * | 2018-12-28 | 2019-05-17 | 广东美的厨房电器制造有限公司 | Microwave cavity component and micro-wave oven |
-
2014
- 2014-08-29 CN CN201420498022.0U patent/CN204201908U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235859A (en) * | 2014-08-29 | 2014-12-24 | 南京三乐微波技术发展有限公司 | Microwave gas cracking device |
| CN104235859B (en) * | 2014-08-29 | 2016-08-17 | 南京三乐微波技术发展有限公司 | Microwave gas cracker |
| CN109764368A (en) * | 2018-12-28 | 2019-05-17 | 广东美的厨房电器制造有限公司 | Microwave cavity component and micro-wave oven |
| CN109764368B (en) * | 2018-12-28 | 2020-07-14 | 广东美的厨房电器制造有限公司 | Microwave cavity assembly and microwave oven |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150311 Effective date of abandoning: 20160817 |
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