CN201174655Y - High-voltage frequency transformer power unit cabinet having self-circulating wind-cooling apparatus - Google Patents
High-voltage frequency transformer power unit cabinet having self-circulating wind-cooling apparatus Download PDFInfo
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- CN201174655Y CN201174655Y CNU2008200795920U CN200820079592U CN201174655Y CN 201174655 Y CN201174655 Y CN 201174655Y CN U2008200795920 U CNU2008200795920 U CN U2008200795920U CN 200820079592 U CN200820079592 U CN 200820079592U CN 201174655 Y CN201174655 Y CN 201174655Y
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Abstract
The utility model relates to a high-voltage frequency converter power unit cabinet with a self-circulation cold air device. A plurality of power units provided with cooling-radiating air ducts are arranged and overlapped inside the cabinet body of the device; and the top side of the cabinet body is provided with a fan which is used for pressurizing hot air flowing through the cooling-radiating air ducts of the power units and is gathered in a seal cavity, and then discharging the hot air out of the cabinet body via an air outlet channel. A heat exchanger lowering temperature via cold water in a metal water pipe is arranged in the air outlet channel, so as to isolate and cool the hot air entering the air outlet channel, to transform the hot air into cold air and then to discharge the cold air; an air outlet of the air outlet channel is directly and hermetically connected with an air inlet of the power unit cabinet; a cabinet door of the device is a sealing door; after the cabinet door is closed, the cabinet body inside of the device is in a hermetic state; and a hermetic space in which the cold air and the hot air circulate and flow automatically is formed inside the power unit cabinet body by means of an air outlet connecting channel. The device is simple and practical in structure, low in the cost for manufacture, application and maintenance, can prolong the service life of equipment, and is remarkable in efficacy.
Description
Technical field
The utility model relates to a kind of high voltage frequency conversion equipment of novel structure, exactly, relates to a kind of high voltage transducer power unit cabinet that has the self-circulation cold wind apparatus, belongs to the power electronic equipment technical field.
Background technology
Be accompanied by the development of microelectronics, power electronic technology, electronic computer technology and Theory of Automatic Control, converter technique has entered a brand-new era, has not only obtained extensive use in a lot of fields, but also has developed rapidly with rapid changepl. never-ending changes and improvementsly.
As everyone knows, converter technique is exactly that dc inverter is become alternating current, alternating current is become behind the direct current another mistake becomes the alternating current of different frequency or direct current is become alternating current and again alternating current is become direct current.In these change procedures, just frequency changes usually.High voltage converter is exactly the transformation of electrical energy device that a kind of speed-sensitive switch effect that utilizes semiconductor power device is transformed to power frequency supply frequency adjustable.Because power electronic power device is in ongoing high speed opening and closing process, the junction temperature of its semi-conducting material rises rapidly.For this reason, power electronic power device all is equipped with fin usually, and is provided with air-cooled passage in high voltage converter, makes the fin of these power electronic power devices can access effective heat radiation and lowers the temperature.
Because the case temperature when power electronic power device is in operate as normal should be no more than 85 ℃, this just requires the cabinet internal temperature of high voltage frequency conversion equipment could guarantee that like this high voltage frequency conversion equipment is in normal, stable operating state below 65 ℃.For example, because the temperature of power electronic power device raises, heating, make the high voltage transducer power unit cabinet that 2% power thermal losses be arranged usually approximately.For powerful high voltage transducer power unit cabinet, this loss that causes because of power device heating is just more considerable and serious.
For this reason, in critical piece-power cell in the high voltage transducer power unit cabinet (referring to Fig. 1), normally the side in its casing A is provided with the air-cooled channel B of heat radiation (being illustrated as the air inlet of this passage) for circulation of air, utilizes the fin of air flows and power device to carry out the working temperature that heat exchange reduces device.Now used as follows in the high voltage transducer power unit cabinet:
Referring to Fig. 2, introducing the high voltage transducer power unit cabinet that adopts at present and be air and the cabinet air outside that the conventional method that how to solve wherein power device heat radiation-utilize power cell dispels the heat in the air-cooled passage circulates: in the cabinet of cold air via Air Filter 13 ingoing power unit cabinets 11, carry out heat exchange and become hot-air via air-cooled passage of the heat radiation of power cell 10 and power electronic device again, enter annular seal space 12, the driving of the blower fan of being installed by power cell cabinet 11 top sides 1 again makes the cabinet outside of this hot-air via the annular seal space 12 and the ducting outlet 14 deliverying unit cabinets 11 of cabinet.Ducting outlet 14 can be directly installed on outdoor, perhaps just is installed in indoor.Usually, the heat dissipation problem that solves low-power high-voltage frequency converter unit cabinet just adopts this traditional approach, and its ducting outlet 6 can be selected any one in above-mentioned two kinds of structures.
Because high voltage converter mostly is used for the serious industries of environmental pollution such as cement, iron and steel, chemical industry, power plant, colliery, the traditional approach of above-mentioned solution high voltage frequency conversion equipment heat dissipation problem just presents following unfavorable factor:
Set up Air Filter 13 on the cabinet door of rack 11, nature can increase product design, processing and assembly technology, use and many workloads such as maintenance.And, after use a period of time, will carry out clean and maintenance to this Air Filter 13.If be installed in the outlet in air channel 14 outdoor, then the air in the workshop can not be recycling, the cold air of sending in the rack 11 just needs to be replenished by the air in the external environment continuously, owing to filling the air dust, sandy soil and molecule in the air of heavy chemical industry surrounding environment, will cause bigger pollution to equipment like this.And, because constantly the air in the workshop is discharged to outdoorly via rack, make airtight workshop have negative pressure, this just makes the door and window in workshop be difficult to open.For fear of this thing happens, the installation environment of high voltage frequency conversion equipment just can not be in sealing state, so also can cause the above-mentioned air that has dust, sandy soil to enter in the rack, influences the useful life of electronic device.
If be installed in the outlet in air channel 14 indoor, the hot blast of discharging from unit cabinet 11 will make the air themperature in the workshop raise rapidly like this, this hot-air is sent in the rack again, just can not realize sufficient heat exchange and cooling effect, when serious, may influence the electronic device useful life of unit cabinet.At this moment, in order to reduce the temperature in the workshop, common employing is provided with the air-conditioning unit and reduces room temperature, causes the raising of capital expenditure and use cost.
Really, the power cell cabinet of high voltage converter can also adopt water cooling to solve the heat dissipation problem of power cell.But water-cooling pattern also has disadvantage: the upper and lower conduit road is installed near the power cell, causes the power supply plug of power cell very inconvenient; The serious hidden danger that also has pipe leakage, it is also not convenient to operate.Moreover, the radiation meeting of the strong-electromagnetic field of high voltage frequency conversion equipment makes cooling water generation ionization and produces a lot of ions, safety for the support equipment electric insulation and the person, water ion absorber device just becomes the auxiliary equipment that must add, thus, cost of investment also just improves, and installs, safeguards also more loaded down with trivial details.
The utility model content
In view of this; the purpose of this utility model provides a kind of high voltage transducer power unit cabinet that has the self-circulation cold wind apparatus; this device can solve the various heat radiation defectives of existing high voltage transducer power unit cabinet equipment; and it is simple in structure, practical; make, operation and maintenance with low cost, can not pollute surrounding environment, also help protecting power cell; prolong the useful life of its electronic device, effect is remarkable.
In order to achieve the above object, the technical solution of the utility model is achieved in that a kind of high voltage transducer power unit cabinet that has the self-circulation cold wind apparatus, arrange in the cabinet of this power cell cabinet, overlappingly be placed with a plurality of power cells that are provided with the cooling heat dissipation air channel, in the cabinet top side, be installed on blower fan, be used for to flow through after the heat dissipation wind channel of each power cell and the hot-air that is summarized in annular seal space carry out supercharging, discharge outside the cabinet via the air-out passage; It is characterized in that: this device carries out following improvement to described air-out passage: set up a heat exchanger in the described air-out passage, be provided with metallic water pipe in this heat exchanger, so that utilize the cold water in this water pipe that the hot-air that enters the air-out passage is isolated cooling, be converted into cold air and discharge; Directly the be tightly connected air inlet of this power cell cabinet of the air outlet of this air-out passage, and the cabinet door of this power cell cabinet changes hermatic door into, close cabinet behind the door, make to be sealing state in this power cell cabinet that this power cell cabinet is inner to be constituted hot and cold air and carry out the seal cavity that self-loopa is flowed therein thereby make by this air-out interface channel.
Described air-out passage is provided with an aerofoil fan in the junction with the air inlet of power cell cabinet.
The structure of described heat exchanger is formed: metallic water pipe from top to bottom, be plate-like or helically is set directly in the air-out passage, this water pipe runs through, be close to a plurality of paliform fin are installed, and the water inlet of water pipe and water return outlet are separately positioned on the outside of air-out passage.
When the air inlet of described air-out passage was positioned at the exhaust outlet of blower fan at this power cell cabinet top, the air outlet of this air-out passage can be set directly at the cabinet top bit of this power cell cabinet, to simplify the structure of this air-out passage.
The air of finishing self-loopa to flow in the seal cavity of described power cell cabinet and carrying out heat exchange can keep its cleanliness factor, is not subjected to external environmental.
Described metallic water pipe is a copper pipe, aluminum or aluminum alloy pipe, steel, aluminium composite pipe.
The utility model is a kind of high voltage transducer power unit cabinet that has the self-circulation cold wind apparatus; this device makes full use of the design feature and the heat radiation approach of existing power cell cabinet; need not carry out bigger technological transformation (in fact to existing equipment; the structural design of the corresponding simplification power cell cabinet of this utility model energy); as long as the Air Filter cabinet door of traditional power cell cabinet is reduced to hermatic door; again the air-out passage is improved; a heat exchanger is set in this passage and increases an aerofoil fan; just can solve the defective of existing power cell cabinet on heat dissipation problem preferably; this apparatus structure is simple; practical; make; operation and maintenance with low cost; neither can be subjected to the influence of heavy chemical industry environmental pollution during the device operation; can not produce new pollution to surrounding environment yet; help protecting high voltage frequency conversion equipment; prolong the useful life of its electronic device, wherein the high-temperature water of heat exchanger can also carry out comprehensive utilization of energy, and effect is remarkable.Therefore, the utlity model has good popularization and application prospect.
Description of drawings
Fig. 1 is the outside drawing of the critical piece-power cell of high voltage converter.
Fig. 2 is that the structure of high voltage converter unit cabinet is formed schematic diagram.
Fig. 3 is that the example structure of the utility model high voltage transducer power unit cabinet of having the self-circulation cold wind apparatus is formed schematic diagram.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 3, introduce the structure composition that the utility model has the high voltage transducer power unit cabinet of self-circulation cold wind apparatus.Arrange in the cabinet of this power cell cabinet 11, overlappingly be placed with a plurality of power cells 10 that are provided with the cooling heat dissipation air channel, in the cabinet top side, be installed on blower fan 1, be used for to flow through after the heat dissipation wind channel of each power cell 10 and the hot-air that is summarized in annular seal space 12 carry out supercharging, send outside the cabinet via air-out passage 8 again.A heat exchanger 6 is set in this air-out passage 8, be provided with metallic water pipe 7 (being copper pipe, aluminum or aluminum alloy pipe, steel, aluminium composite pipe) in this heat exchanger 6, utilize the cooling water in this water pipe 7 that the hot-air that enters air-out passage 8 is isolated cooling, be converted into cold air and discharge.5 is water inlets among the figure, the 4th, and delivery port.Directly the be tightly connected air inlet of this power cell cabinet 11 of directly the be tightly connected air outlet of blower fan 1 of the air inlet of this air-out passage 8, its air outlet, and, an aerofoil fan 9 be provided with at the air inlet place of this power cell cabinet 11.In addition, with the cabinet door of this power cell cabinet 11 is hermatic door, close cabinet behind the door, these power cell cabinet 11 inside just are sealing state, and make the inside of this power cell cabinet 11 constitute hot and cold air by this air-out interface channel 8 to carry out the seal cavity that self-loopa is flowed therein.
The structure of heat exchanger 6 of the present utility model is formed: metallic water pipe 7 from top to bottom, be plate-like or helically is set directly in the air-out passage, this water pipe 7 runs through, be close to a plurality of paliform radiating fins 3 are installed, and radiating fin 3 is and vertically fitly is arranged in this air-out interface channel 8.The water inlet 5 of water pipe 7 and water return outlet 4 are separately positioned on the outside of air-out passage 8.After hot-air enters air-out passage 8 from the air inlet of enclosure top, will be from preceding order then, run through radiating fin 7 through over-heat-exchanger 6, because water at low temperature is meanwhile arranged is flowed through after the metallic water pipe 7 by water inlet 5, again from the process that water return outlet 4 flows out, absorb the heat of hot-air and make its cooling and finish heat exchange.Just become cold air through over-heat-exchanger 6 cooled air, reenter the top side of unit cabinet 11 again via air-out passage 8, begin again to carry out air-cooled power cell 10 wherein.The effect of aerofoil fan 9 is to improve wind speed, increases its cooling effect.
The utility model finishes in its seal cavity that self-loopa is flowed and the air that carries out heat exchange can keep its cleanliness factor, is not subjected to external environmental.
Claims (6)
1, a kind of high voltage transducer power unit cabinet that has the self-circulation cold wind apparatus, arrange in the cabinet of this power cell cabinet, overlappingly be placed with a plurality of power cells that are provided with the cooling heat dissipation air channel, in the cabinet top side, be installed on blower fan, be used for to flow through after the heat dissipation wind channel of each power cell and the hot-air that is summarized in annular seal space carry out supercharging, discharge outside the cabinet via the air-out passage; It is characterized in that: this device carries out following improvement to described air-out passage: set up a heat exchanger in the described air-out passage, be provided with metallic water pipe in this heat exchanger, so that utilize the cold water in this water pipe that the hot-air that enters the air-out passage is isolated cooling, be converted into cold air and discharge; Directly the be tightly connected air inlet of this power cell cabinet of the air outlet of this air-out passage, and the cabinet door of this power cell cabinet changes hermatic door into, close cabinet behind the door, make to be sealing state in this power cell cabinet that this power cell cabinet is inner to be constituted hot and cold air and carry out the seal cavity that self-loopa is flowed therein thereby make by this air-out interface channel.
2, high voltage transducer power unit cabinet according to claim 1 is characterized in that: described air-out passage is provided with an aerofoil fan in the junction with the air inlet of power cell cabinet.
3, high voltage transducer power unit cabinet according to claim 1, it is characterized in that: the structure of described heat exchanger is formed and is: metallic water pipe from top to bottom, be plate-like or helically is set directly in the air-out passage, this water pipe runs through, be close to a plurality of paliform fin are installed, and the water inlet of water pipe and water return outlet are separately positioned on the outside of air-out passage.
4, high voltage transducer power unit cabinet according to claim 1, it is characterized in that: when the air inlet of described air-out passage is positioned at the exhaust outlet of blower fan at this power cell cabinet top, the air outlet of this air-out passage can be set directly at the cabinet top bit of this power cell cabinet, to simplify the structure of this air-out passage.
5, the high voltage transducer power unit cabinet that is used for according to claim 1 is characterized in that: finish in the seal cavity of described power cell cabinet that self-loopa is flowed and the air that carries out heat exchange can keep its cleanliness factor, be not subjected to external environmental.
6, the high voltage transducer power unit cabinet that is used for according to claim 1, it is characterized in that: described metallic water pipe is a copper pipe, aluminum or aluminum alloy pipe, steel, aluminium composite pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200795920U CN201174655Y (en) | 2008-03-26 | 2008-03-26 | High-voltage frequency transformer power unit cabinet having self-circulating wind-cooling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200795920U CN201174655Y (en) | 2008-03-26 | 2008-03-26 | High-voltage frequency transformer power unit cabinet having self-circulating wind-cooling apparatus |
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| Publication Number | Publication Date |
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| CN201174655Y true CN201174655Y (en) | 2008-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200795920U Expired - Lifetime CN201174655Y (en) | 2008-03-26 | 2008-03-26 | High-voltage frequency transformer power unit cabinet having self-circulating wind-cooling apparatus |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101959392A (en) * | 2010-09-02 | 2011-01-26 | 成都市华为赛门铁克科技有限公司 | Heat radiation system |
| CN102404975A (en) * | 2010-09-15 | 2012-04-04 | 鸿富锦精密工业（深圳）有限公司 | Data center |
| CN103828153A (en) * | 2011-09-28 | 2014-05-28 | 三菱电机株式会社 | Control board |
| CN104284567A (en) * | 2014-10-20 | 2015-01-14 | 中山市安领星电子科技有限公司 | Heat-dissipating type high-voltage pulse electronic fence host |
| CN104917355A (en) * | 2015-05-28 | 2015-09-16 | 株洲变流技术国家工程研究中心有限公司 | Circulating heat radiation method of high-voltage frequency converter |
| CN105392326A (en) * | 2015-10-13 | 2016-03-09 | 株洲变流技术国家工程研究中心有限公司 | Heat radiation method of closed rectification power supply device |
| CN105658039A (en) * | 2016-03-18 | 2016-06-08 | 广州市铭钰标识科技有限公司 | Environmentally-friendly energy-saving air cooling constant temperature system |
| CN106231880A (en) * | 2016-09-26 | 2016-12-14 | 国网安徽省电力公司检修公司 | One has the hydronic intelligent terminal cabinet of air |
| CN107769525A (en) * | 2017-11-28 | 2018-03-06 | 西安中车永电电气有限公司 | The air-cooled auxiliary-radiating structure of power cell self-loopa and power cell drive device |
| CN107860243A (en) * | 2016-09-21 | 2018-03-30 | 荏原冷热系统株式会社 | Heat exchanger |
| CN109347307A (en) * | 2018-10-31 | 2019-02-15 | 中冶焦耐(大连)工程技术有限公司 | A kind of system and method efficiently cooled down for high-voltage frequency converter cabinet |
| CN110649794A (en) * | 2019-10-15 | 2020-01-03 | 广州市伟达力电器有限公司 | High-voltage inverter power unit cabinet with self-circulation cold air device |
| CN111146924A (en) * | 2018-11-02 | 2020-05-12 | 株洲中车时代电气股份有限公司 | Power conversion device and heat dissipation system thereof |
| CN114744526A (en) * | 2022-04-18 | 2022-07-12 | 菱亚能源科技（深圳）股份有限公司 | Draw-out type low-voltage switch cabinet |
| CN118714829A (en) * | 2024-08-30 | 2024-09-27 | 太原工业学院 | Cooling device for frequency converter of wind driven generator |
-
2008
- 2008-03-26 CN CNU2008200795920U patent/CN201174655Y/en not_active Expired - Lifetime
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101959392B (en) * | 2010-09-02 | 2012-09-19 | 成都市华为赛门铁克科技有限公司 | Heat radiation system |
| CN101959392A (en) * | 2010-09-02 | 2011-01-26 | 成都市华为赛门铁克科技有限公司 | Heat radiation system |
| CN102404975B (en) * | 2010-09-15 | 2016-03-30 | 鸿富锦精密工业（深圳）有限公司 | Data center |
| CN102404975A (en) * | 2010-09-15 | 2012-04-04 | 鸿富锦精密工业（深圳）有限公司 | Data center |
| CN103828153B (en) * | 2011-09-28 | 2016-11-02 | 三菱电机株式会社 | Control dish |
| CN103828153A (en) * | 2011-09-28 | 2014-05-28 | 三菱电机株式会社 | Control board |
| CN104284567A (en) * | 2014-10-20 | 2015-01-14 | 中山市安领星电子科技有限公司 | Heat-dissipating type high-voltage pulse electronic fence host |
| CN104917355A (en) * | 2015-05-28 | 2015-09-16 | 株洲变流技术国家工程研究中心有限公司 | Circulating heat radiation method of high-voltage frequency converter |
| CN105392326A (en) * | 2015-10-13 | 2016-03-09 | 株洲变流技术国家工程研究中心有限公司 | Heat radiation method of closed rectification power supply device |
| CN105658039A (en) * | 2016-03-18 | 2016-06-08 | 广州市铭钰标识科技有限公司 | Environmentally-friendly energy-saving air cooling constant temperature system |
| CN105658039B (en) * | 2016-03-18 | 2018-03-09 | 广州市铭钰标识科技有限公司 | The air-cooled constant temperature system of environmental protection and energy saving |
| CN107860243A (en) * | 2016-09-21 | 2018-03-30 | 荏原冷热系统株式会社 | Heat exchanger |
| CN107860243B (en) * | 2016-09-21 | 2020-08-14 | 荏原冷热系统株式会社 | Heat exchanger |
| CN106231880A (en) * | 2016-09-26 | 2016-12-14 | 国网安徽省电力公司检修公司 | One has the hydronic intelligent terminal cabinet of air |
| CN107769525A (en) * | 2017-11-28 | 2018-03-06 | 西安中车永电电气有限公司 | The air-cooled auxiliary-radiating structure of power cell self-loopa and power cell drive device |
| CN107769525B (en) * | 2017-11-28 | 2024-04-26 | 西安中车永电电气有限公司 | Power unit self-circulation air-cooled auxiliary heat dissipation structure and power unit driving device |
| CN109347307A (en) * | 2018-10-31 | 2019-02-15 | 中冶焦耐(大连)工程技术有限公司 | A kind of system and method efficiently cooled down for high-voltage frequency converter cabinet |
| CN109347307B (en) * | 2018-10-31 | 2024-03-19 | 中冶焦耐(大连)工程技术有限公司 | System and method for high-efficiency cooling of high-voltage frequency converter cabinet |
| CN111146924A (en) * | 2018-11-02 | 2020-05-12 | 株洲中车时代电气股份有限公司 | Power conversion device and heat dissipation system thereof |
| CN110649794A (en) * | 2019-10-15 | 2020-01-03 | 广州市伟达力电器有限公司 | High-voltage inverter power unit cabinet with self-circulation cold air device |
| CN114744526A (en) * | 2022-04-18 | 2022-07-12 | 菱亚能源科技（深圳）股份有限公司 | Draw-out type low-voltage switch cabinet |
| CN118714829A (en) * | 2024-08-30 | 2024-09-27 | 太原工业学院 | Cooling device for frequency converter of wind driven generator |
| CN118714829B (en) * | 2024-08-30 | 2024-11-01 | 太原工业学院 | Cooling device for frequency converter of wind driven generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING HEKANG FREQUENCY CONVERSION SCIENCE CO., L Free format text: FORMER NAME: BEIJING BILLION OF HONG SHENG TECHNOLOGY CO. |
|
| CP03 | Change of name, title or address |
Address after: Middle and small technology enterprise base of No. 19, West ancient street, Beijing, Shijingshan District, China: 100043 Patentee after: Beijing Hiconics Drive Technology Co.,Ltd. Address before: Middle and small technology enterprise base of No. 19, West ancient street, Beijing, Shijingshan District, China: 100043 Patentee before: Beijing Hiconics Yisheng Technology Co., Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Effective date of registration: 20091111 Pledge (preservation): Pledge |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Effective date of registration: 20091111 Pledge (preservation): Pledge |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20100528 Granted publication date: 20081231 Pledgee: Zhongguancun Beijing science and technology Company limited by guarantee Pledgor: Beijing Hiconics Drive Technology Co.,Ltd. Registration number: 2009110000641 |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100043 Shijingshan District City, the ancient city of Beijing, West Street, No. 19 small and medium enterprises base Patentee after: Beijing Kang Kang Xin Polytron Technologies Inc Address before: 100043 Shijingshan District City, the ancient city of Beijing, West Street, No. 19 small and medium enterprises base Patentee before: Beijing Hiconics Drive Technology Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081231 |