CN201491354U - Electronic rectifier circuit and electrodeless lamp - Google Patents
Electronic rectifier circuit and electrodeless lamp Download PDFInfo
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- CN201491354U CN201491354U CN2009202048601U CN200920204860U CN201491354U CN 201491354 U CN201491354 U CN 201491354U CN 2009202048601 U CN2009202048601 U CN 2009202048601U CN 200920204860 U CN200920204860 U CN 200920204860U CN 201491354 U CN201491354 U CN 201491354U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses an electronic rectifier circuit and an electrodeless lamp; the electronic rectifier circuit and electrodeless lamp comprises an input filter circuit which is used for filtering input noise and high-frequency interference signals; a slow boosting rectification circuit which is connected with the input filter circuit and is used for outputting direct-current working voltage; a passive filter circuit which is connected with the slow boosting rectification circuit and is used for filtering and correction of power factor; a constant voltage trigger circuit which is connected with the passive filter circuit and is used for partial voltage and safety starting; and a self-oscillation high-frequency converter which is connected with the constant voltage trigger circuit and is used for generating a high-frequency oscillation signal; the electrodeless lamp comprises a lamp holder and a lamp housing which is provided with a discharge chamber and a central concave cavity, and the lamp holder is connected with the lamp housing; the electrodeless lamp further comprises an electronic rectifier circuit, the electronic rectifier circuit is electrically connected with the lamp holder; in the utility model, the slow boosting rectification circuit and the constant voltage trigger circuit are arranged, so as to solve the safety starting problem of the electrodeless lamp; in addition, the volume is small, the allocation is simple, the external accessories are less and the cost is low.
Description
Technical field
The utility model belongs to the electron rectifier circuit field, is specifically related to a kind of electron rectifier circuit and has the electrodeless lamp of electron rectifier circuit.
Background technology
Electrodeless lamp is the latest generation green illumination light source, and the filament or the electrode that do not have the general lighting lamp to have in the lamp only are made up of a hollow discharge bulb and a coupler.It is that electromagnetic field by radio-frequency generator is coupled in the lamp in the mode of induction, make the gas avalanche ionization in the bulb, form plasma, the plasma excited atom gives off the ultraviolet ray of 253.7nm when returning ground state, the fluorescent material of bulb inner wall is subjected to the ultraviolet ray excited generation visible light of 253.7nm.The HF lamp without electrodes MaLS is up to more than 15 years, so it is long to be specially adapted to lighting hours, changes the light source difficulty and changes the high place of light source cost.
At present, in the electrodeless lamp of family expenses small-power type, often volume is big, cost is high for the electron rectifier circuit, and difficult startup, light efficiency and property safe and reliable to operation are low, use peripheral component also many, therefore need a kind of easy startup, light efficiency height, electron rectifier circuit that property safe and reliable to operation is high.
Summary of the invention
The utility model purpose is to provide a kind of electron rectifier circuit and electrodeless lamp, solves effectively that electron rectifier circuit volume is big in the prior art, cost is high, difficult startup, light efficiency and the low problem of property safe and reliable to operation.
For solving the problems of the technologies described above, the utility model is achieved through the following technical solutions:
A kind of electron rectifier circuit comprises the input filter circuit that is used for filtering input noise and high-frequency interferencing signal; Be connected with input filter circuit, be used to export the slow boost rectifying circuit of direct-current working volts; Be connected with slow boost rectifying circuit, be used for the passive filter circuit of filtering and power factor correction; Be connected with passive filter circuit, be used for the level pressure circuits for triggering of dividing potential drop and clean boot; Be connected with the level pressure circuits for triggering, be used to produce the self-oscillation high-frequency converter of high-frequency oscillation signal.
In the above-mentioned electron rectifier circuit, described input filter circuit comprises common mode inductance L1 and is connected across first and second filter capacitor C1, the C2 at this common mode inductance L1 two ends.
In the above-mentioned electron rectifier circuit, described slow boost rectifying circuit comprise the bridge rectifier formed by first, second, third and fourth diode D1, D2, D3, D4 and with first, second, third and fourth diode D1, D2, D3, D4 in the boost capacitor C3 that is connected in parallel of any one diode; The positive pole of the first diode D1 of described bridge rectifier, the negative pole of the 4th diode D4 are connected to the two ends of the second filter capacitor C2 of input filter circuit.
In the above-mentioned electron rectifier circuit, described passive filter circuit is to have pursuing of power adjustment functions to flow filter circuit, or other passive filter circuit.
In the above-mentioned electron rectifier circuit, described passive filter circuit comprises first and second low frequency filtering capacitor C 4, C5 and the 5th, six, the seven diode D5, D6, the D7 that are connected in series successively; The described first low frequency filtering capacitor C, 4 one ends are connected with the negative pole of the 5th diode D5, the positive pole of the 6th diode D6 respectively, and the other end is connected with the negative pole of the first diode D1 of the negative pole of the 7th diode D7, bridge rectifier respectively; The positive pole of described the 5th diode D5 is connected with the positive pole of the 4th diode D4 of an end of the second low frequency filtering capacitor C 5, bridge rectifier respectively, and the other end of the second low frequency filtering capacitor C 5 is connected with the negative pole of the 6th diode D6, the positive pole of the 7th diode D7 respectively.
In the above-mentioned electron rectifier circuit, the capacity of described boost capacitor C3 be in the passive filter circuit first and second low frequency filtering capacitor C 4, C5 capacity 1/100～1/10.
In the above-mentioned electron rectifier circuit, described level pressure circuits for triggering comprise storage capacitor C6, bidirectional trigger diode ST, the 8th diode D8 and first and second divider resistance R1, the R2 that are connected in series; The end of the described first divider resistance R1 is connected with the negative pole of the 7th diode D7 of passive filter circuit, and the end of the second divider resistance R2 is connected with the positive pole of the 5th diode D5 of the end of storage capacitor C6, passive filter circuit respectively; The other end of storage capacitor C6 is connected between first and second divider resistance R1, the R2, and the positive pole with bidirectional trigger diode ST, the 8th diode D8 is connected respectively.
In the above-mentioned electron rectifier circuit, described self-oscillation high-frequency converter comprises first and second field-effect transistor Q1, Q2, coupling transformer T, the 5th inductance coil L5, loading coil L6, the 7th, eight, nine capacitor C 7, C8, C9, the 9th, ten, 11,12 diode D9, D10, D11, D12, and described coupling transformer T comprises primary coil L2 and first and second secondary coil L3, L4; Described primary coil L2 one end is connected with bidirectional trigger diode ST one end of the 7th capacitor C 7 one ends, level pressure circuits for triggering respectively, and the other end is connected with the second divider resistance R2, the storage capacitor C6 of the positive pole of the source electrode of the 8th capacitor C 8 one ends, loading coil L6 one end, the second field-effect transistor Q2, the 12 diode D12, second subprime coil L4 one end, level pressure circuits for triggering respectively; The described first secondary coil L3, one end is connected with the positive pole of the 9th diode D9, the grid of the first field-effect transistor Q1 respectively, the negative pole of the 9th diode D9 is connected with the negative pole of the tenth diode D10, and the positive pole of the tenth diode D10 is connected with the negative pole of the 8th diode D8 of the drain electrode of the source electrode of the first secondary coil L3 other end, the first field-effect transistor Q1, the second field-effect transistor Q2, the 5th inductance coil L5 one end, level pressure circuits for triggering respectively; The other end of second subprime coil L4 is connected with the grid of the second field-effect transistor Q2, the positive pole of the 11 diode D11 respectively, and the negative pole of the 11 diode D11 is connected with the negative pole of the 12 diode D12; The 5th inductance coil L5 other end is connected with the 7th capacitor C 7 other ends, the 8th capacitor C 8 other ends, the 9th capacitor C 9 one ends respectively, and the 9th capacitor C 9 other ends are connected with the loading coil L6 other end.
A kind of electrodeless lamp, the lamp housing that comprises lamp holder, has discharge cavity and central cavity, described lamp holder is connected with lamp housing; Also comprise above-mentioned electron rectifier circuit, this electron rectifier circuit is electrically connected with lamp holder.
The utility model compared with prior art has following beneficial effect:
(1) the utility model is provided with slow boost rectifying circuit and level pressure circuits for triggering, has solved the clean boot problem of electrodeless lamp;
(2) volume is little, and configuration is simple, and external accessories is few, and cost is low, and energy-conservation.
Description of drawings
Fig. 1 is the schematic diagram of the utility model electron rectifier circuit;
Fig. 2 is the structural representation of electrodeless lamp.
Embodiment
In order to understand the utility model better, the utility model is done to describe further below in conjunction with the drawings and specific embodiments.
See also Fig. 1 and Fig. 2, electron rectifier circuit (promptly comprising electron rectifier circuit main body 3 and loading coil L6 among Fig. 2) comprises input filter circuit I, slow boost rectifying circuit II, passive filter circuit III, level pressure circuits for triggering IV and self-oscillation high-frequency converter a.This electrodeless lamp comprises lamp holder 1, has the lamp housing 2 and the electron rectifier circuit of discharge cavity 201 and central cavity 202, and lamp holder 1 is connected with lamp housing 2, and this electron rectifier circuit is electrically connected with lamp holder 1.Exchange input earlier through input filter circuit I filtering, obtain direct current by slow boost rectifying circuit II then, this direct current carries out filtering by passive filter circuit III again, filtered direct current is transformed to high-frequency ac by self-oscillation high-frequency converter a, and then the discharge cavity 201 that drives the lamp housing 2 of electrodeless lamp carries out luminous work, and the startup work of self-oscillation high-frequency converter a is controlled by level pressure circuits for triggering IV.
From Fig. 1 as seen, input filter circuit I comprises common mode inductance L1 and is connected across first and second filter capacitor C1, the C2 at common mode inductance L1 two ends, is used for filtering input noise and high-frequency interferencing signal.
Slow boost rectifying circuit II comprises bridge rectifier of being made up of first, second, third and fourth diode D1, D2, D3, D4 and the boost capacitor C3 that is connected in parallel with the 4th diode D4, and wherein boost capacitor C3 also can be connected in parallel with any one diode among first, second and third diode D1, D2, the D3.Bridge rectifier is connected with the output of input filter circuit I, is used to export direct-current working volts.Boost capacitor C3 capacity is less, generally be among the passive filter circuit III first and second low frequency filtering capacitor C 4, C5 capacity 1/100～1/10, before electrodeless lamp starts, the output voltage of slow boost rectifying circuit II slowly rises, and its peak approaches the input alternating voltage
Doubly, and after the electrodeless lamp startup work, the output voltage of slow boost rectifying circuit II descends rapidly, and its voltage peak maintains about 2 times of input alternating voltage, and this has just created condition for clean boot.
Passive filter circuit III comprises first and second low frequency filtering capacitor C 4, C5 and the 5th, six, the seven diode D5, D6, the D7 that are connected in series successively, is used for filtering and power factor correction.This circuit is to have pursuing of power adjustment functions to flow filter circuit, also can be other passive filter circuit.
Level pressure circuits for triggering IV comprises storage capacitor C6, bidirectional trigger diode ST, the 8th diode D8 and first and second divider resistance R1, the R2 that are connected in series, after the direct current input, on the primary coil L2 of its output termination coupling transformer T.In order to protect bidirectional trigger diode ST; it is no longer produced for the second time after startup triggers; the junction of first and second divider resistance R1, R2 is connected to the path of the second field-effect transistor Q2 drain electrode that is connected to self-oscillation high-frequency converter a; by the unidirectional conducting discharge of the 8th diode D8, do not allow it arrive the trigger voltage rated value again.This electron rectifier circuit has solved the clean boot problem of electrodeless lamp by the cooperation of slow boost rectifying circuit II and level pressure circuits for triggering IV.
Self-oscillation high-frequency converter a comprises first and second field-effect transistor Q1, Q2, coupling transformer T, the 5th inductance coil L5, loading coil L6, the 7th, eight, nine capacitor C 7, C8, C9, the 9th, ten, 11,12 diode D9, D10, D11, D12; Coupling transformer T comprises primary coil L2 and first and second secondary coil L3, L4.Output and the coupling transformer T of level pressure circuits for triggering IV join, and the high-frequency oscillation signal of generation is transported to loading coil L6 through coupling, for electrodeless lamp provides the high-frequency electromagnetic field energy.Nine, ten, 11,12 diode D9, D10, D11, D12 are connected on respectively on corresponding first and second secondary coil L3, the L4, play the bi-directional voltage stabilizing effect.
The utility model electron rectifier circuit has used slow boost rectifying circuit II and level pressure circuits for triggering IV, finishes the clean boot of electrodeless lamp jointly.Because electrodeless lamp when starting, needs bigger starting power, and the holding power after starting is less.This electron rectifier circuit is before electrodeless lamp starts, no matter whether public AC power is on the low side, DC power supply voltage after its rectification can both reach the higher voltage scope, and a certain design point triggering startup in the higher voltage scope, so that enough big starting power to be provided; And after electrodeless lamp started, the voltage of the DC power supply after its rectification returned to the normal condition behind the common bridge rectifier, and normal design power can be provided, to guarantee the operate as normal of electrodeless lamp.When electric network source is the 220V alternating current, carry out bridge rectifier through slow boost rectifying circuit II, the voltage after boosting is in the higher voltage value, and this magnitude of voltage is positioned at
With
Between; In level pressure circuits for triggering IV, this DC input voitage is charged to storage capacitor C6 through first and second divider resistance R1, R2 dividing potential drop, when the voltage at storage capacitor C6 two ends reaches the trigger voltage VsT of bidirectional trigger diode ST, bidirectional trigger diode ST triggers work, and DC input voitage is in a higher voltage value (this value is positioned at when selecting the size of first and second divider resistance R1, R2 can design bidirectional trigger diode ST to trigger work
With
Between), when starting, just can provide sufficiently high input power like this, to guarantee clean boot; But after the clean boot, because the capacity of boost capacitor C3 is much smaller than first and second low frequency filtering capacitor C 4, C5, the defeated people's voltage of direct current returns to lower value (this value is less than 220V) behind the common bridge rectifier.In fact, even public AC supply voltage is very low, 160V for example triggers DC input voitage when starting and still is in a higher voltage design load (this value is positioned at
With
Between), thereby guarantee its clean boot.
In order to verify the actual effect of this electron rectifier circuit, as shown in Figure 2, the discharge cavity 201 diameter 90mm of lamp housing 2, central cavity 202 diameter 25mm, the parameter of electron rectifier circuit is as follows: boost capacitor C3 is 1 μ F, first, two divider resistance R1, R2 is respectively 2M Ω, 180K Ω, first, two low frequency filtering capacitor C 4, C5 is 47 μ F, storage capacitor C6 is 0.022 μ F, the trigger voltage VsT of bidirectional trigger diode ST is 32V, and the 7th capacitor C 7 is 27PF, and the 8th capacitor C 8 is 3000PF, the 9th capacitor C 9 is 470PF, and the 5th inductance coil L5 is 20 μ H.The parameter of experiment gained is as shown in table 1:
Table 1
From top circuit parameter, the theoretical value that calculates the DC power supply voltage when triggering startup is: VsT * R1/R2 ≈ 355V.When input ac voltage changes, for example when 180V was changed to 220V, the DC power supply voltage when triggering of its experiment gained starts all was 352V.This magnitude of voltage is higher, and does not change with the input variation of AC voltage, thereby assurance has bigger input power when starting, and guarantees its clean boot.
The startup of this electron rectifier circuit is safe and reliable, and simple in structure, reliable operation, with low cost, is very suitable for the small-power compact electrodeless lamp.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; should be understood that; for the person of ordinary skill of the art; every any modification of within spirit of the present utility model and principle, being done, be equal to and replace or improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. an electron rectifier circuit is characterized in that, comprises the input filter circuit that is used for filtering input noise and high-frequency interferencing signal; Be connected with input filter circuit, be used to export the slow boost rectifying circuit of direct-current working volts; Be connected with slow boost rectifying circuit, be used for the passive filter circuit of filtering and power factor correction; Be connected with passive filter circuit, be used for the level pressure circuits for triggering of dividing potential drop and clean boot; Be connected with the level pressure circuits for triggering, be used to produce the self-oscillation high-frequency converter of high-frequency oscillation signal.
2. electron rectifier circuit according to claim 1 is characterized in that, described input filter circuit comprises common mode inductance (L1) and is connected across first and second filter capacitor (C1), (C2) at this common mode inductance (L1) two ends.
3. electron rectifier circuit according to claim 2, it is characterized in that, described slow boost rectifying circuit comprise the bridge rectifier formed by first, second, third and fourth diode (D1), (D2), (D3), (D4) and with first, second, third and fourth diode (D1), (D2), (D3), (D4) in the boost capacitor (C3) that is connected in parallel of any one diode; The positive pole of first diode (D1) of described bridge rectifier, the negative pole of the 4th diode (D4) are connected to the two ends of second filter capacitor (C2) of input filter circuit.
4. electron rectifier circuit according to claim 3 is characterized in that, described passive filter circuit is to have pursuing of power adjustment functions to flow filter circuit.
5. electron rectifier circuit according to claim 3 is characterized in that, described passive filter circuit comprises first and second low frequency filtering electric capacity (C4), (C5) and the 5th, six, seven diodes (D5), (D6), (D7) that are connected in series successively; The described first low frequency filtering electric capacity (C4) end is connected with the negative pole of the 5th diode (D5), the positive pole of the 6th diode (D6) respectively, and the other end is connected with the negative pole of first diode (D1) of the negative pole of the 7th diode (D7), bridge rectifier respectively; The positive pole of described the 5th diode (D5) is connected with the positive pole of the 4th diode (D4) of an end of the second low frequency filtering electric capacity (C5), bridge rectifier respectively, and the other end of the second low frequency filtering electric capacity (C5) is connected with the negative pole of the 6th diode (D6), the positive pole of the 7th diode (D7) respectively.
6. electron rectifier circuit according to claim 5 is characterized in that, the capacity of described boost capacitor (C3) be in the passive filter circuit first and second low frequency filtering electric capacity (C4), (C5) capacity 1/100～1/10.
7. electron rectifier circuit according to claim 6, it is characterized in that described level pressure circuits for triggering comprise storage capacitor (C6), bidirectional trigger diode (ST), the 8th diode (D8) and first and second divider resistance (R1), (R2) that are connected in series; One end of described first divider resistance (R1) is connected with the negative pole of the 7th diode (D7) of passive filter circuit, and an end of second divider resistance (R2) is connected with the positive pole of the 5th diode (D5) of an end of storage capacitor (C6), passive filter circuit respectively; The other end of storage capacitor (C6) is connected between first and second divider resistance (R1), (R2), and the positive pole with bidirectional trigger diode (ST), the 8th diode (D8) is connected respectively.
8. electron rectifier circuit according to claim 7, it is characterized in that, described self-oscillation high-frequency converter comprises first and second field-effect transistor (Q1), (Q2), coupling transformer (T), the 5th inductance coil (L5), loading coil (L6), the 7th, eight, nine electric capacity (C7), (C8), (C9), the 9th, ten, 11,12 diodes (D9), (D10), (D11), (D12), and described coupling transformer (T) comprises primary coil (L2) and first and second secondary coil (L3), (L4); Described primary coil (L2) end is connected with bidirectional trigger diode (ST) end of the 7th electric capacity (C7) end, level pressure circuits for triggering respectively, and the other end is connected with source electrode, the positive pole of the 12 diode (D12), second subprime coil (L4) end, second divider resistance (R2) of level pressure circuits for triggering, the storage capacitor (C6) of the 8th electric capacity (C8) end, loading coil (L6) end, second field-effect transistor (Q2) respectively; Described first secondary coil (L3) end is connected with the positive pole of the 9th diode (D9), the grid of first field-effect transistor (Q1) respectively, the negative pole of the 9th diode (D9) is connected with the negative pole of the tenth diode (D10), and the positive pole of the tenth diode (D10) is connected with the negative pole of the 8th diode (D8) of the drain electrode of the source electrode of first secondary coil (L3) other end, first field-effect transistor (Q1), second field-effect transistor (Q2), the 5th inductance coil (L5) end, level pressure circuits for triggering respectively; The other end of second subprime coil (L4) is connected with the grid of second field-effect transistor (Q2), the positive pole of the 11 diode (D11) respectively, and the negative pole of the 11 diode (D11) is connected with the negative pole of the 12 diode (D12); The 5th inductance coil (L5) other end is connected with the 7th electric capacity (C7) other end, the 8th electric capacity (C8) other end, the 9th electric capacity (C9) end respectively, and the 9th electric capacity (C9) other end is connected with loading coil (L6) other end.
9. electrodeless lamp, the lamp housing that comprises lamp holder, has discharge cavity and central cavity, described lamp holder is connected with lamp housing; It is characterized in that also comprise any described electron rectifier circuit of claim 1～8, this electron rectifier circuit is electrically connected with lamp holder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202048601U CN201491354U (en) | 2009-09-09 | 2009-09-09 | Electronic rectifier circuit and electrodeless lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009202048601U CN201491354U (en) | 2009-09-09 | 2009-09-09 | Electronic rectifier circuit and electrodeless lamp |
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| CN201491354U true CN201491354U (en) | 2010-05-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088814A (en) * | 2010-12-02 | 2011-06-08 | 山东柏斯莱特照明电器有限公司 | Low-frequency electrodeless lamp drive circuit with open-circuit protection function |
| WO2018041125A1 (en) * | 2016-08-31 | 2018-03-08 | Sengled Optoelectronics Co., Ltd | Led lamp base and led bulb |
| CN109474170A (en) * | 2018-10-31 | 2019-03-15 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | A kind of seabed is plugged into the power circuit of box |
-
2009
- 2009-09-09 CN CN2009202048601U patent/CN201491354U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088814A (en) * | 2010-12-02 | 2011-06-08 | 山东柏斯莱特照明电器有限公司 | Low-frequency electrodeless lamp drive circuit with open-circuit protection function |
| CN102088814B (en) * | 2010-12-02 | 2013-07-31 | 山东柏斯莱特照明电器有限公司 | Low-frequency electrodeless lamp drive circuit with open-circuit protection function |
| WO2018041125A1 (en) * | 2016-08-31 | 2018-03-08 | Sengled Optoelectronics Co., Ltd | Led lamp base and led bulb |
| CN109474170A (en) * | 2018-10-31 | 2019-03-15 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | A kind of seabed is plugged into the power circuit of box |
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Granted publication date: 20100526 Termination date: 20110909 |