CN107269359B - A kind of diesel engine after treatment device with exhaust gas heating - Google Patents
A kind of diesel engine after treatment device with exhaust gas heating Download PDFInfo
- Publication number
- CN107269359B CN107269359B CN201710657327.XA CN201710657327A CN107269359B CN 107269359 B CN107269359 B CN 107269359B CN 201710657327 A CN201710657327 A CN 201710657327A CN 107269359 B CN107269359 B CN 107269359B
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- CN
- China
- Prior art keywords
- impeller
- conductive sheet
- mixing tank
- exhaust gas
- control cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to automobile exhaust gas processing apparatus, more particularly to a kind of diesel engine after treatment device with exhaust gas heating, including engine, mixing tank, catalyst assembly case, urea box, DCU control unit and control cabinet；The inside of mixing tank is equipped with heating tube, impeller and stirring rod；The left and right sides inside control cabinet is equipped with sliding rail, and sliding block is equipped in sliding rail, and the outer wall of control cabinet is equipped with conductive sheet set.The present invention is being in low load operation when engine or vehicle, and when the initial temperature of urea sprinkling is not achieved in the temperature of tail gas, DCU control unit can start heating tube, heat to tail gas, to reach defined requirement；Impeller can blow downwards tail gas, and convenient for tail gas in conjunction with urea, the rotation of stirring rod, which is conducive to urea, sufficiently reacts with tail gas and contact；Thermal expansion and contraction principle is used in control cabinet, impeller and stirring rod are controlled, and there is actual effect.
Description
Technical field
The present invention relates to automobile exhaust gas processing apparatus, after a kind of diesel engine with exhaust gas heating
Manage device.
Background technique
Vehicle exhaust is the exhaust gas generated when automobile use, and containing hundreds of different compound, pollutant therein has
Solid aerosol, carbon monoxide, carbon dioxide, hydrocarbon, oxynitrides, lead and oxygen sulfur compound etc..Tail gas exists
While being directly detrimental to health, it can also exert far reaching influence to the environment of human lives.Sulfur dioxide in tail gas has
Strong impulse smell is easy to cause the generation of " acid rain " when reaching a certain concentration, cause soil and water source to be acidified, influence farming
The growth of object and forest.
China mainly uses selective catalysis reaction system (SCR) to handle diesel engine vent gas at present, but when hair
When motivation or vehicle are in low load operation, the initial temperature of urea sprinkling is not achieved in delivery temperature, can there is DCU control unit
The case where control nozzle does not spray, so that portion, which cannot be handled, to be discharged into atmosphere, it cannot be effectively
Achieve the purpose that cleaning of off-gas；And the mixing for urea and exhaust gas, traditional processing unit are directly sprayed using urea,
In the presence of uneven, the insufficient drawback of mixing.
Summary of the invention
(1) the technical issues of solving
Present invention aims to overcome that the shortcomings that above-mentioned prior art, after providing a kind of diesel engine with exhaust gas heating
The problem of managing device, solve when ureaclastic initial temperature is not achieved in delivery temperature, heated in real-time being carried out to exhaust gas.
(2) technical solution
A kind of diesel engine after treatment device with exhaust gas heating, including engine, mixing tank, catalyst assembly case, urea
Case, DCU control unit and control cabinet, the engine, mixing tank and catalyst assembly case are sequentially connected by pipeline, described mixed
The inside of mould assembling is equipped with heating tube, impeller and stirring rod, and the heating tube is spirally distributed on the inner wall of mixing tank, described
Impeller is equipped with 2, is divided into impeller I and impeller II, and the impeller I and impeller II are arranged at top, and the stirring rod setting exists
Lower section；The urea box is connected with urea pump by conduit, and the urea pump is connected with spray head, and the spray head is arranged in mixing tank
In；The DCU control unit is connected with temperature sensor and nitrogen oxide sensor, the temperature sensor and nitrogen oxide sensor setting
In the inside of catalyst assembly case, the heating tube, urea pump are also connected in DCU control unit；The control cabinet is fixed on
On pipeline between engine and mixing tank, the left and right sides inside the control cabinet is equipped with sliding rail, is equipped in the sliding rail
Sliding block, the sliding block are connect by spring with control cabinet, are connected between the sliding block by conducting wire, and the outer wall of the control cabinet is set
Have a conductive sheet set, the conductive sheet set between the upper and lower every setting, the conductive sheet set by conducting wire and power supply, impeller I, impeller II and
Stirring rod connection.
Further, filter screen is equipped with inside the pipeline between the mixing tank and catalyst assembly case.
Further, the bottom surface of the control cabinet is set as sealing film, and setting is directly contacted with pipeline outer wall.
Further, the sliding block is set as metal block, and the sliding block and sliding rail are in close contact.
Further, each conductive sheet set includes 2 conductive sheets, and the conductive sheet is separately positioned on control cabinet
The left and right sides.
Further, the conductive sheet set is divided into conductive sheet set and lower conductive sheet set, and the upper conductive sheet set is led under
Electric piece group is arranged in parallel.
(3) beneficial effect
A kind of diesel engine after treatment device with exhaust gas heating provided by the invention, when engine or vehicle are in underload
Operating, when the initial temperature of urea sprinkling is not achieved in the temperature of tail gas, DCU control unit starts heating tube, adds to tail gas
Heat treatment, to reach defined requirement；Impeller can blow downwards tail gas, convenient for tail gas in conjunction with urea, the rotation of stirring rod
Be conducive to urea and sufficiently react with tail gas contact；Thermal expansion and contraction principle is used in control cabinet, and impeller and stirring rod are controlled,
With actual effect.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description be only it is of the invention, protect some embodiments, it is right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the enlarged structure schematic diagram of A in Fig. 1；
Fig. 3 be the present invention in conductive sheet set, power supply, impeller and stirring rod circuit connecting relation figure；
In attached drawing, parts list represented by the reference numerals are as follows:
1- engine, 2- mixing tank, 3- catalyst assembly case, 4- urea box, 5- urea pump, 6-DCU control unit, 7- control
Case processed, 8- pipeline, 9- heating tube, 10- impeller I, 11- impeller II, 12- stirring rod, 13- temperature sensor, 14- nitrogen oxygen sensing
Device, 15- filter screen, 16- sliding rail, 17- sliding block, the upper conductive sheet set of 18-, conductive sheet set under 19-, 20- spring, 21- seal film,
22- conducting wire, 23- conduit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
As shown in FIG. 1 to 3, it is a kind of with exhaust gas heating diesel engine after treatment device, including engine 1, mixing tank 2,
Catalyst assembly case 3, urea box 4, DCU control unit 6 and control cabinet 7, engine 1, mixing tank 2 and catalyst assembly case 3 are logical
Piping 8 is sequentially connected, and the inside of mixing tank 2 is equipped with heating tube 9, impeller and stirring rod 12, and heating tube 9 is spirally distributed
On the inner wall of mixing tank 2, impeller is equipped with 2, is divided into impeller I 10 and impeller II 11, impeller I 10 and impeller II 11 are arranged at
Side, stirring rod 12 are arranged below；Urea box 4 is connected with urea pump 5 by conduit 22, and urea pump 5 is connected with spray head, and spray head is set
It sets in mixing tank 2；DCU control unit 6 is connected with temperature sensor 13 and nitrogen oxide sensor 14, temperature sensor 13 and nitrogen oxygen
The inside of catalyst assembly case 3 is arranged in sensor 14, and heating tube 9, urea pump 4 are also connected in DCU control unit 6；Control
Case 7 is fixed on the pipeline 8 between engine 1 and mixing tank 2, and the left and right sides inside control cabinet 7 is equipped with sliding rail 16, sliding rail
Sliding block 17 is equipped in 16, sliding block 17 is connect by spring 20 with control cabinet 7, is connected between sliding block 17 by conducting wire 22, control cabinet 7
Outer wall be equipped with conductive sheet set, for conductive sheet set between the upper and lower every setting, conductive sheet set passes through conducting wire 22 and power supply, impeller I 10, impeller
II 11 and stirring rod 12 connect.
Further, filter screen 15 is equipped with inside the pipeline 8 between mixing tank 2 and catalyst assembly case 3, filter screen 15 can
To tail gas Partial filtration.
Further, the bottom surface of control cabinet 7 is set as sealing film 21, and directly contacts setting with 8 outer wall of pipeline.
Further, sliding block 17 is set as metal block, and sliding block 17 and sliding rail 16 are in close contact, make the gas of 17 top of sliding block with
Lower section it is gas-insulated.
Further, each conductive sheet set includes 2 conductive sheets, and conductive sheet is separately positioned on the left and right two of control cabinet 7
Side.
Further, conductive sheet set is divided into conductive sheet set 18 and lower conductive sheet set 19, upper conductive sheet set 18 and lower conduction
Piece group 19 is arranged in parallel.
The course of work of the invention, the tail gas that engine 1 is discharged is transmitted in mixing tank 2 by pipeline 8, due to exhaust temperature
Height triggers DCU control unit 6, and then DCU control unit 6 controls urea pump 5, urea is transported from conduit 23 to spray head, right
It is sprayed in mixing tank 2；When tail gas is through piping 8, tube wall temperature is increased, and passes to sealing film 21, and then in control cabinet 7
Gas expansion, to sliding block 17 squeeze, move down it, first contacted with upper conductive sheet set 18, circuit is switched on, impeller I 10
It starts to work with stirring rod 12, impeller I 10 blows downwards tail gas, and stirring rod 12 can guarantee sufficiently reacting for tail gas and urea,
When tail gas amount increases in pipeline, temperature can increase again, and sliding block 17 continues to move down, and sliding block 17 connects with the disengaging of upper conductive sheet set 18
It touches and is contacted with lower conductive sheet set 19, impeller II 11 is also powered on, and effect is blown in enhancing, avoids tail gas excessive, impeller effect
Effect is unobvious；After urea is reacted with tail gas, then chemical reaction, final output nitrogen and water are generated in catalyst assembly case 3,
Achieve the purpose that cleaning of off-gas.If engine 1 is in low load operation, exhaust temperature is not high, can trigger DCU control unit
The starting of 6 pairs of heating tubes 9 makes tail gas be heated to the temperature of requirement.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Specific features described in conjunction with this embodiment or example, structure, material live feature and are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, also do not limit the specific embodiment that the invention is only.Obviously, according to the content of this specification, can make
Many modifications and variations.These embodiments are chosen and specifically described to this specification, is original in order to better explain the present invention
Reason and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only authorized
The limitation of sharp claim and its full scope and equivalent.
Claims (6)
1. it is a kind of with exhaust gas heating diesel engine after treatment device, including engine, mixing tank, catalyst assembly case, urea box,
DCU control unit and control cabinet, which is characterized in that the engine, mixing tank and catalyst assembly case are successively connected by pipeline
It connects, the inside of the mixing tank is equipped with heating tube, impeller and stirring rod, and the heating tube is spirally distributed in mixing tank
On wall, the impeller is equipped with 2, is divided into impeller I and impeller II, and the impeller I and impeller II are arranged at top, the stirring
Bar is arranged below；The urea box is connected with urea pump by conduit, and the urea pump is connected with spray head, the spray head setting
In mixing tank；The DCU control unit is connected with temperature sensor and nitrogen oxide sensor, and the temperature sensor and nitrogen oxygen pass
The inside of catalyst assembly case is arranged in sensor, and the heating tube, urea pump are also connected in DCU control unit；The control
Case is fixed on the pipeline between engine and mixing tank, and the left and right sides inside the control cabinet is equipped with sliding rail, the cunning
Sliding block is equipped in rail, the sliding block is connect by spring with control cabinet, is connected between the sliding block by conducting wire, the control cabinet
Outer wall be equipped with conductive sheet set, the conductive sheet set between the upper and lower every setting, the conductive sheet set by conducting wire and power supply, impeller I,
Impeller II is connected with stirring rod.
2. a kind of diesel engine after treatment device with exhaust gas heating according to claim 1, which is characterized in that the mixing tank
Filter screen is equipped with inside pipeline between catalyst assembly case.
3. a kind of diesel engine after treatment device with exhaust gas heating according to claim 1, which is characterized in that the control
The bottom surface of case is set as sealing film, and setting is directly contacted with pipeline outer wall.
4. a kind of diesel engine after treatment device with exhaust gas heating according to claim 1, which is characterized in that the sliding block
It is set as metal block, the sliding block and sliding rail are in close contact.
5. a kind of diesel engine after treatment device with exhaust gas heating according to claim 1, which is characterized in that each described
Conductive sheet set includes 2 conductive sheets, and the conductive sheet is separately positioned on the left and right sides of control cabinet.
6. a kind of diesel engine after treatment device with exhaust gas heating according to claim 1, which is characterized in that the conduction
Piece group is divided into conductive sheet set and lower conductive sheet set, and the upper conductive sheet set and lower conductive sheet set are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710657327.XA CN107269359B (en) | 2017-08-03 | 2017-08-03 | A kind of diesel engine after treatment device with exhaust gas heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710657327.XA CN107269359B (en) | 2017-08-03 | 2017-08-03 | A kind of diesel engine after treatment device with exhaust gas heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107269359A CN107269359A (en) | 2017-10-20 |
| CN107269359B true CN107269359B (en) | 2019-08-16 |
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ID=60075542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710657327.XA Active CN107269359B (en) | 2017-08-03 | 2017-08-03 | A kind of diesel engine after treatment device with exhaust gas heating |
Country Status (1)
| Country | Link |
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| CN (1) | CN107269359B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708304A (en) * | 2019-02-22 | 2019-05-03 | 南通港华锅炉有限公司 | A kind of hot-water boiler of high combustion efficiency |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003100225A1 (en) * | 2002-05-07 | 2003-12-04 | Extengine Transport Systems | Emission control system |
| CN205315084U (en) * | 2015-12-24 | 2016-06-15 | 东风康明斯发动机有限公司 | Vent gas treatment system in is assisted in diesel engine electrical heating |
| CN206254773U (en) * | 2016-11-16 | 2017-06-16 | 浙江群实王网络科技有限公司 | A kind of roof heat insulation plate |
-
2017
- 2017-08-03 CN CN201710657327.XA patent/CN107269359B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003100225A1 (en) * | 2002-05-07 | 2003-12-04 | Extengine Transport Systems | Emission control system |
| CN205315084U (en) * | 2015-12-24 | 2016-06-15 | 东风康明斯发动机有限公司 | Vent gas treatment system in is assisted in diesel engine electrical heating |
| CN206254773U (en) * | 2016-11-16 | 2017-06-16 | 浙江群实王网络科技有限公司 | A kind of roof heat insulation plate |
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| Publication number | Publication date |
|---|---|
| CN107269359A (en) | 2017-10-20 |
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Address after: Shuangfeng Industrial Zone of Hefei City, Anhui province 230000 Patentee after: Hefei Yunnei Power Co., Ltd Address before: Shuangfeng road Shuangfeng Development Zone in Hefei City, Anhui Province, No. 015 230000 Patentee before: Hefei Jianghuai chaochai Power Co. Ltd. |
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