CN108716783A - A kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system - Google Patents
A kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system Download PDFInfo
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- CN108716783A CN108716783A CN201810426818.8A CN201810426818A CN108716783A CN 108716783 A CN108716783 A CN 108716783A CN 201810426818 A CN201810426818 A CN 201810426818A CN 108716783 A CN108716783 A CN 108716783A
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- 239000012530 fluid Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 abstract description 6
- 230000005494 condensation Effects 0.000 abstract description 5
- 229920006395 saturated elastomer Polymers 0.000 description 9
- 239000011555 saturated liquid Substances 0.000 description 8
- 230000006837 decompression Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
A kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system, including evaporator, turbine, generator, regenerator, cooler, injector, separator and booster pump；The first entrance of the outlet connection regenerator of booster pump, the first entrance of the first outlet connection evaporator of regenerator, the entrance of the first outlet connection turbine of evaporator, the second entrance of the outlet connection regenerator of turbine, the entrance of the second outlet connection cooler of regenerator, the first entrance of the outlet connection injector of cooler, the entrance of the outlet connection separator of injector；Separator outlet is divided into two-way, connects the second entrance of injector all the way, and another way connects the entrance of booster pump；Turbine is connected with generator.The present invention efficiently solves Trans-critical cycle CO2The condensation problem of power cycle at normal temperatures.
Description
Technical field
The invention belongs to the recycling of middle low temperature heat energy and field of dynamic engineering, more particularly to a kind of back pressure injecting type Trans-critical cycles
CO2Power cycle generating system.
Background technology
Trans-critical cycle CO2Power cycle is as a kind of novel thermodynamic cycle, due to its low boiling working fluid CO2It is wide with distribution
The advantages that general, environmental-friendly, cost low and high temperature is not easily decomposed, is nonflammable and nontoxic, and CO2Face in super in evaporator
Phase transformation is not present in boundary's state, can preferably match heat source heat exchange, reduce the complexity of evaporation structure, therefore more than the middle low temperature
Heat utilization field has a extensive future.Existing Trans-critical cycle CO2Power circulation system major technique is described below：
(1) simple Trans-critical cycle CO2Power cycle
Mainly it is made of evaporator, turbine, condenser and booster pump.The cryogenic high pressure supercritical CO that booster pump comes out2Into
Enter evaporator, exchange heat with heat source, be heated to form high temperature and pressure supercriticality, does work into turbine expansion, driving power generation
Machine externally exports electric energy.Lack of gas enter condenser after acting, by being condensed into liquid CO with low-temperature receiver heat exchange2, finally enter increasing
Pump is added to complete entire cycle.
(2) the Trans-critical cycle CO with backheat2Power cycle
With simple Trans-critical cycle CO2Power cycle is compared, the Trans-critical cycle CO with backheat2Power cycle increases back in turbine outlet
Hot device preheats the CO after condensation pressurization using turbine lack of gas2, to improve system thermal efficiency.
For Trans-critical cycle CO2Power cycle, working medium CO2Critical-temperature be 31 DEG C, if you need to be condensed into liquid, then
Condensation temperature has to be lower than 31 DEG C, therefore deposits the problem of condensing at ambient temperature, to limit Trans-critical cycle CO2Power cycle
Practical application.At present for Trans-critical cycle CO2Vacancy is also compared in the condensation correlative study of power cycle working medium.
Invention content
The purpose of the present invention is to provide a kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system, in solution
State problem.
To achieve the above object, the present invention uses following technical scheme：
A kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system, including evaporator, turbine, generator, backheat
Device, cooler, injector, separator and booster pump；The first entrance of the outlet connection regenerator of booster pump, the first of regenerator
The first entrance of outlet connection evaporator, the entrance of the first outlet connection turbine of evaporator, the outlet of turbine connects regenerator
Second entrance, regenerator second outlet connection cooler entrance, cooler outlet connection injector first entrance,
The entrance of the outlet connection separator of injector；Separator outlet is divided into two-way, connects the second entrance of injector all the way, another
Road connects the entrance of booster pump；Turbine is connected with generator.
Further, it is provided with pressure reducing throttle valve between the outlet and separator of injector.
Further, the first entrance of the second outlet connection injector of regenerator, the outlet of injector connects cooler
Entrance, cooler outlet connection separator entrance.
Further, it is provided with pressure reducing throttle valve between the outlet and separator of cooler.
Further, the cycle fluid in cycle generating system is cryogenic high pressure supercritical CO2。
Further, turbine is connect with generator coaxle.
Compared with prior art, the present invention has following technique effect：
The present invention is in back pressure injecting type Trans-critical cycle CO2On the basis of power cycle generating system, by injector exit
Cooler is moved between regenerator and injector, and the turbine lack of gas of regenerator outlet are cooled down through cooler first, enter back into spray
Emitter injection saturated gas is separated into saturated gas then by pressure reducing throttle valve decompression expansion to two-phase section through separator
And saturated liquid, saturated gas enter injector as driving fluid, saturated liquid is pressurized as working media by booster pump
Afterwards, regenerator and evaporator heat absorption are sequentially entered, turbine expansion acting is eventually entered into.The improvement system can ensure CO2It is cold
While solidifying and system stable operation, the working medium in further cooling back-heating device exit advantageously reduces turbine back pressure, increases saturating
Flat acting, improves the thermal efficiency of cycle.
The present invention realizes Trans-critical cycle CO2Application of power cycle under the conditions of environment temperature low-temperature receiver.For routine across facing
Boundary CO2Power cycle is due to CO2Condensation problem caused by 31 DEG C of critical-temperature is relatively low under the conditions of environment temperature low-temperature receiver, this
Invention proposes a kind of Novel back pressure injection type Trans-critical cycle CO2Power cycle, the turbine lack of gas come out from regenerator first pass around spray
Emitter enters cooler after being mixed with driving fluid, is cooled to environment temperature or more, then passes through pressure reducing throttle valve decompression expansion
To two-phase section, it is separated into two strands of saturated gas and saturated liquid through separator, saturated gas enters injection as driving fluid
Device, saturated liquid after booster pump is pressurized, sequentially enters regenerator and evaporator heat absorption, eventually enter into as working media
Flat expansion work.The present invention solves Trans-critical cycle CO2The condensation problem of power cycle at ambient temperature, ensure that the steady of system
Fixed operation.
Description of the drawings
Fig. 1 is the electricity generation system schematic diagram that regenerator is directly connected to cooler；
Fig. 2 is the electricity generation system schematic diagram that regenerator is indirectly connected with cooler.
Wherein：1, evaporator；2, turbine；3, generator；4, regenerator；5, cooler；6, injector；7, decompression throttling
Valve；8, separator；9, booster pump.
Specific implementation mode
Below in conjunction with attached drawing, the present invention is further described：
It please refers to Fig.1 and Fig. 2, a kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system, including evaporator 1, thoroughly
Flat 2, generator 3, regenerator 4, cooler 5, injector 6, separator 8 and booster pump 9；The outlet of booster pump 9 connects regenerator 4
First entrance, the first entrance of the first outlet connection evaporator 1 of regenerator 4, the first outlet of evaporator 1 connects turbine 2
Entrance, turbine 2 outlet connection regenerator 4 second entrance, regenerator 4 second outlet connection cooler 5 entrance, it is cold
But the first entrance of the outlet connection injector 6 of device 5, the entrance of the outlet connection separator 8 of injector 6；The outlet point of separator 8
For two-way, the second entrance of injector 6 is connected all the way, and another way connects the entrance of booster pump 9；Turbine 2 is connected with generator 3.
It is provided with pressure reducing throttle valve 7 between the outlet and separator 8 of injector 6.
The cryogenic high pressure supercritical CO come out from booster pump 92Pass through regenerator 4 and evaporator 1 successively, is heated to form high temperature
After High-pressure supercritical state, into 2 expansion work of turbine, driving generator 3 externally exports electric energy.Turbine lack of gas enter regenerator
After 4 release heats, entering injector 6 after cooler 5 is further cooling, acceleration and pressure decrease generates high speed steam in nozzle,
Mixing chamber forms high vacuum, and the steam that separator comes out is drawn into mixing chamber, and diffuser deceleration diffusion is entered after mixing.From
The working medium that injector 6 comes out is separated into saturated liquid by 7 throttling expansion of pressure reducing throttle valve to two-phase section into separator 8
And saturated gas, saturated gas are sucked up to injector 6 as driving fluid, saturated liquid enters after the supercharging of booster pump 9
Regenerator 4 absorbs heat, completes entire cycle.
The first entrance of the second outlet connection injector 6 of regenerator 4, the outlet connection cooler 5 of injector 6 enter
Mouthful, the entrance of the outlet connection separator 8 of cooler 5.
The cryogenic high pressure supercritical CO come out from booster pump 92Pass through regenerator 4 and evaporator 1 successively, is heated to form high temperature
After High-pressure supercritical state, into 2 expansion work of turbine, driving generator 3 externally exports electric energy.Turbine lack of gas enter regenerator
After 4 release heats, into injector, acceleration and pressure decrease generates high speed steam in nozzle, forms high vacuum in mixing chamber, will detach
The steam that device comes out is drawn into mixing chamber, and diffuser deceleration diffusion is entered after mixing.The working medium come out from injector enters cold
But device is cooled to critical-temperature or more, then by 7 throttling expansion of pressure reducing throttle valve to two-phase section, is detached into separator 8
At saturated liquid and saturated gas, saturated gas is sucked up to injector as driving fluid, and saturated liquid increases by booster pump 9
Enter regenerator 4 after pressure and absorb heat, completes entire cycle.
It is provided with pressure reducing throttle valve 7 between the outlet and separator 8 of cooler 5.
Cycle fluid in cycle generating system is cryogenic high pressure supercritical CO2。
Turbine 2 and generator 3 are coaxially connected.
Claims (6)
1. a kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system, which is characterized in that including evaporator (1), turbine
(2), generator (3), regenerator (4), cooler (5), injector (6), separator (8) and booster pump (9)；Booster pump (9)
The first entrance of outlet connection regenerator (4), the first entrance of the first outlet connection evaporator (1) of regenerator (4), evaporator
(1) entrance of first outlet connection turbine (2), the second entrance of the outlet connection regenerator (4) of turbine (2), regenerator (4)
Second outlet connection cooler (5) entrance, cooler (5) outlet connection injector (6) first entrance, injector
(6) entrance of outlet connection separator (8)；Separator (8) outlet is divided into two-way, connects the second of injector (6) all the way and enters
Mouthful, another way connects the entrance of booster pump (9)；Turbine (2) is connected with generator (3).
2. a kind of back pressure injecting type Trans-critical cycle CO according to claim 12Power cycle generating system, which is characterized in that spray
It is provided with pressure reducing throttle valve (7) between the outlet and separator (8) of emitter (6).
3. a kind of back pressure injecting type Trans-critical cycle CO according to claim 12Power cycle generating system, which is characterized in that return
The first entrance of the second outlet connection injector (6) of hot device (4), the entrance of the outlet connection cooler (5) of injector (6),
The entrance of the outlet connection separator (8) of cooler (5).
4. a kind of back pressure injecting type Trans-critical cycle CO according to claim 32Power cycle generating system, which is characterized in that cold
But pressure reducing throttle valve (7) is provided between the outlet of device (5) and separator (8).
5. a kind of back pressure injecting type Trans-critical cycle CO according to claim 12Power cycle generating system, which is characterized in that follow
Cycle fluid in ring electricity generation system is cryogenic high pressure supercritical CO2。
6. a kind of back pressure injecting type Trans-critical cycle CO according to claim 12Power cycle generating system, which is characterized in that thoroughly
Flat (2) and generator (3) are coaxially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426818.8A CN108716783B (en) | 2018-05-07 | 2018-05-07 | Back pressure jet type transcritical CO2Power cycle power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426818.8A CN108716783B (en) | 2018-05-07 | 2018-05-07 | Back pressure jet type transcritical CO2Power cycle power generation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108716783A true CN108716783A (en) | 2018-10-30 |
| CN108716783B CN108716783B (en) | 2020-10-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810426818.8A Expired - Fee Related CN108716783B (en) | 2018-05-07 | 2018-05-07 | Back pressure jet type transcritical CO2Power cycle power generation system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612168A (en) * | 2018-11-16 | 2019-04-12 | 广东工业大学 | A kind of jetting type organic rankine cycle system |
| CN109654894A (en) * | 2018-12-05 | 2019-04-19 | 东北大学 | One kind being based on CO2The recycling of sinter waste heat and the system of utilizing of trans critical cycle |
| CN109944649A (en) * | 2019-03-05 | 2019-06-28 | 中国科学院力学研究所 | One kind cooling down power circulation method and system from depth |
| CN110030041A (en) * | 2019-04-16 | 2019-07-19 | 天津大学 | Using the system of low-temperature heat source power generation capacity in jet pump and separator raising |
| CN110081628A (en) * | 2019-04-30 | 2019-08-02 | 西安交通大学 | Trans-critical cycle CO with separator2Mixed working fluid back pressure injecting type combined cooling and power system |
| CN111735237A (en) * | 2020-05-25 | 2020-10-02 | 昆明理工大学 | Well low temperature heat utilization merit cold joint system |
| CN112880222A (en) * | 2021-01-27 | 2021-06-01 | 郑州大学 | Carbon dioxide transcritical air supplementing and enthalpy increasing system with power generation function |
| WO2021171312A1 (en) * | 2020-02-26 | 2021-09-02 | INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT Madras) | Two stage regenerative organic rankine cycle (orc) heat recovery based power generation system |
| CN113958380A (en) * | 2021-09-22 | 2022-01-21 | 西安交通大学 | Transcritical carbon dioxide power generation system and method using gas-liquid separator and ejector |
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| CN207035548U (en) * | 2017-04-29 | 2018-02-23 | 天津大学 | A kind of injecting type combined cooling and power circulatory system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109612168A (en) * | 2018-11-16 | 2019-04-12 | 广东工业大学 | A kind of jetting type organic rankine cycle system |
| CN109612168B (en) * | 2018-11-16 | 2024-04-23 | 广东工业大学 | Jet-type organic Rankine cycle system |
| CN109654894A (en) * | 2018-12-05 | 2019-04-19 | 东北大学 | One kind being based on CO2The recycling of sinter waste heat and the system of utilizing of trans critical cycle |
| CN109944649A (en) * | 2019-03-05 | 2019-06-28 | 中国科学院力学研究所 | One kind cooling down power circulation method and system from depth |
| CN110030041A (en) * | 2019-04-16 | 2019-07-19 | 天津大学 | Using the system of low-temperature heat source power generation capacity in jet pump and separator raising |
| CN110081628A (en) * | 2019-04-30 | 2019-08-02 | 西安交通大学 | Trans-critical cycle CO with separator2Mixed working fluid back pressure injecting type combined cooling and power system |
| CN110081628B (en) * | 2019-04-30 | 2020-05-22 | 西安交通大学 | Transcritical CO with separator2Mixed working medium back pressure jet type combined cooling and power supply system |
| WO2021171312A1 (en) * | 2020-02-26 | 2021-09-02 | INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT Madras) | Two stage regenerative organic rankine cycle (orc) heat recovery based power generation system |
| CN111735237A (en) * | 2020-05-25 | 2020-10-02 | 昆明理工大学 | Well low temperature heat utilization merit cold joint system |
| CN112880222A (en) * | 2021-01-27 | 2021-06-01 | 郑州大学 | Carbon dioxide transcritical air supplementing and enthalpy increasing system with power generation function |
| CN112880222B (en) * | 2021-01-27 | 2022-12-20 | 郑州大学 | Carbon dioxide transcritical air supplementing and enthalpy increasing system with power generation function |
| CN113958380A (en) * | 2021-09-22 | 2022-01-21 | 西安交通大学 | Transcritical carbon dioxide power generation system and method using gas-liquid separator and ejector |
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| Publication number | Publication date |
|---|---|
| CN108716783B (en) | 2020-10-27 |
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