CN210668551U - Fuel cell temperature control test system - Google Patents
Fuel cell temperature control test system Download PDFInfo
- Publication number
- CN210668551U CN210668551U CN201922219544.8U CN201922219544U CN210668551U CN 210668551 U CN210668551 U CN 210668551U CN 201922219544 U CN201922219544 U CN 201922219544U CN 210668551 U CN210668551 U CN 210668551U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- fuel cell
- pipeline
- hydrogen
- air
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The utility model discloses a fuel cell temperature control test system, which comprises a refrigerating unit, a third heat exchanger, a hydrogen heat exchange system, a fuel cell heat exchange system and an air heat exchange system, wherein the hydrogen heat exchange system, the fuel cell heat exchange system and the air heat exchange system are respectively connected with the third heat exchanger; controlling the temperature of the fuel cell body, the anode gas hydrogen and the cathode gas oxygen by using cooling liquid; the refrigerating unit enters the fuel cell body through the pump circulation to control the temperature of the fuel cell body; the refrigerating unit is connected with the hydrogen gas heat exchange module. The refrigerating unit is connected with the air temperature control module, the control logic of each electromagnetic valve is accurately calculated, different time of the heat exchanger is measured, and the temperature control of the air is finally realized; the refrigerating unit is connected with the tail gas treatment module to realize steam-water separation through condensation of the tail gas module. The final testing system realizes temperature control of the fuel cell body and the cathode and anode gases and tail gas treatment; meanwhile, the system has the cathode and anode gas treatment function.
Description
Technical Field
The utility model relates to a new forms of energy field of observing and controling specifically is a fuel cell control by temperature change test system.
Background
The fuel cell temperature control test system is mainly used for controlling parameters such as internal reaction temperature of the fuel cell, temperature, pressure, flow and the like of cathode and anode gases, and simulating the operation state of the fuel cell, so that the influence of the internal reaction temperature and the parameters such as the pressure, the flow, the temperature and the like of the cathode and the anode gases on the output performance of the fuel cell is observed.
In the existing research and development, the control of cathode and anode gases and the internal temperature of a fuel cell is lacked by the accurate temperature control of cooling liquid of a refrigerating unit; thereby realizing the control of the pressure, the flow and the dryness and humidity of the gas of the cathode and the anode.
Disclosure of Invention
The utility model aims at providing a fuel cell control by temperature change test system.
In order to realize the purpose, the technical scheme of the utility model is that:
a temperature control test system for a fuel cell comprises a refrigerating unit, a third heat exchanger, and a hydrogen heat exchange system, a fuel cell heat exchange system and an air heat exchange system which are respectively connected with the refrigerating unit and the third heat exchanger, wherein the refrigerating unit and the third heat exchanger are mutually communicated;
the fuel cell heat exchange system comprises a fourth heat exchanger and a fuel cell, the third heat exchanger is communicated with the fourth heat exchanger, the fourth heat exchanger penetrates through the fuel cell through a pipeline, and an outlet of the hydrogen pipeline is connected to an inlet of the fuel cell;
the air heat exchange system comprises an air pipeline and a steam-water separator, one end of the air pipeline is connected to an air source, the other end of the air pipeline sequentially penetrates through a fifth heat exchanger, a sixth heat exchanger and a seventh heat exchanger to be communicated with an inlet of the fuel cell, and the fifth heat exchanger, the sixth heat exchanger, the seventh heat exchanger and the steam-water separator are respectively communicated with a third heat exchanger.
Furthermore, a first branch pipe is arranged on a hydrogen pipeline between the tail end of the first heat exchanger and the top end of the second heat exchanger, a first electromagnetic valve is arranged on the first branch pipe, a second branch pipe is arranged between the tail end of the first heat exchanger and the tail end of the second heat exchanger, and a second electromagnetic valve is arranged on the second branch pipe.
Furthermore, a third branch pipe is arranged on an air pipeline between the tail end of the fifth heat exchanger and the top end of the seventh heat exchanger, a seventh electromagnetic valve is arranged on the third branch pipe, a fourth branch pipe is arranged on the air pipeline between the tail end of the fifth heat exchanger and the tail end of the seventh heat exchanger, and a seventh electromagnetic valve is arranged on the fourth branch pipe.
Further, a first pressure reducing valve, a first pressure sensor, a first temperature sensor, a second pressure reducing valve, a second pressure sensor, a second temperature sensor, a third pressure reducing valve, a third pressure sensor, a third temperature sensor, a drying filter and a first humidifier are sequentially arranged on the hydrogen pipeline between the hydrogen pipeline inlet and the first heat exchanger, and a fourth pressure reducing valve, a fourth pressure sensor and a fourth temperature sensor are arranged on the hydrogen pipeline between the tail end of the second heat exchanger and the fuel cell inlet.
Furthermore, a second filter, an air compressor, a sixth temperature sensor, a sixth pressure sensor, a first filter, a second humidifier, a sixth pressure reducing valve, a seventh temperature sensor and a seventh pressure sensor are sequentially arranged on the pipeline between the air pipeline inlet and the top end of the fifth heat exchanger, and a fifth pressure reducing valve, a fifth pressure sensor and a fifth temperature sensor are arranged on the air pipeline between the tail end of the seventh heat exchanger and the fuel cell inlet.
Furthermore, a fifth electromagnetic valve, a sixth electromagnetic valve and a ninth electromagnetic valve are respectively arranged on pipelines between the sixth heat exchanger, the seventh heat exchanger, the steam-water separator and the outlet of the third heat exchanger, and a second water pump is arranged on the outlet of the third heat exchanger.
Furthermore, a third electromagnetic valve and a fourth electromagnetic valve are respectively arranged on pipelines among the eighth heat exchanger, the second heat exchanger and the third heat exchanger, and a first water pump is further arranged on the pipeline at the outlet of the third heat exchanger.
Furthermore, a third water pump is arranged on a pipeline at the outlet of the fourth heat exchanger, and a fourth water pump is arranged on a pipeline between the outlet of the third heat exchanger and the fourth heat exchanger.
Furthermore, a fifth branch pipe is arranged on a hydrogen pipeline between the outlet of the fuel cell and the third pressure reducing valve, and an air pump is arranged on the fifth branch pipe.
Further, the fuel cell outlet is communicated with the steam-water separator through a pipeline.
Compared with the prior art, the utility model has the advantages and positive effect be:
the system main body generates cooling liquid in a certain temperature range through a refrigerating unit; the fuel cell body, the anode gas hydrogen and the cathode gas air are subjected to temperature control through the cooling liquid. The refrigerating unit enters the fuel cell body through pump circulation to control the temperature of the fuel cell body, and is connected with the hydrogen gas heat exchange module to finally realize the temperature control of the hydrogen gas at different times through the heat exchanger. The refrigerating unit is connected with the air temperature control module, and finally realizes the temperature control of the air through different time of the heat exchanger. The refrigerating unit is connected with the tail gas treatment module to realize steam-water separation through condensation of the tail gas module. The final testing system realizes temperature control of the fuel cell body and the cathode and anode gases and tail gas treatment; meanwhile, the system has the cathode and anode gas treatment function.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1. a first pressure reducing valve; 2. a first pressure sensor; 3. a first temperature sensor; 4. a second pressure reducing valve; 5. a second pressure sensor; 6. a second temperature sensor; 7. a third pressure reducing valve; 8. a third pressure sensor; 9. a third temperature sensor; 10. drying the filter; 11. a first humidifier; 12. a first heat exchanger; 13. a first solenoid valve; 14. a second solenoid valve; 15. a second heat exchanger; 16. a third electromagnetic valve; 17. a fourth solenoid valve; 18. a first water pump; 19. a fourth pressure sensor; 20. a fourth temperature sensor; 21. a fourth pressure reducing valve; 22. a third heat exchanger; 23. a fourth heat exchanger; 24. a steam-water separator; 25. a fifth temperature sensor; 26. a fifth pressure sensor; 27. a fifth pressure reducing valve; 28. a refrigeration unit; 29. a second humidifier; 30. a first filter; 31. a sixth pressure sensor; 32. a sixth temperature sensor; 33. an air compressor; 34. a second filter; 35. a sixth pressure reducing valve; 36. a seventh temperature sensor; 37. a seventh pressure sensor; 38. a fifth solenoid valve; 39. a sixth electromagnetic valve; 40. a fifth heat exchanger; 42. a sixth heat exchanger; 43. a seventh heat exchanger; 44. a seventh electromagnetic valve; 45. an eighth solenoid valve; 46. an air pump; 47. an eighth heat exchanger; 48. a ninth electromagnetic valve; 49. a second water pump; 50. a third water pump; 51. a fourth water pump; 52. a hydrogen gas conduit; 53. a first branch pipe; 54. a second branch pipe; 55. thirdly, pipe distribution; 56. a fourth branch pipe; 57. a fuel cell; 58. fifth pipe distribution; 59. an air duct.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, any modifications, equivalent replacements, improvements, etc. made by other embodiments obtained by a person of ordinary skill in the art without creative efforts shall be included in the protection scope of the present invention.
As shown in fig. 1, a temperature control testing system for a fuel cell 57 comprises a refrigerating unit 28, a third heat exchanger 22, and a hydrogen heat exchange system, a fuel cell heat exchange system, and an air heat exchange system connected to the refrigerating unit 28 and the third heat exchanger 22, respectively, wherein the hydrogen heat exchange system comprises a hydrogen pipeline 52, one end of the hydrogen pipeline 52 is connected to a hydrogen source, and the other end of the hydrogen pipeline 52 is connected to the fuel cell 57 heat exchange system, the hydrogen pipeline 52 sequentially passes through a first heat exchanger 12, an eighth heat exchanger 47, and a second heat exchanger 15, the first heat exchanger 12, the eighth heat exchanger 47, and the second heat exchanger 15 are respectively communicated with the third heat exchanger 22 through pipelines;
the fuel cell heat exchange system comprises a fourth heat exchanger 23 and a fuel cell 57, wherein the third heat exchanger 22 is communicated with the fourth heat exchanger 23, the fourth heat exchanger 23 passes through the fuel cell 57 through a pipeline, and the outlet of the hydrogen pipeline 52 is connected to the inlet of the fuel cell 57;
the air heat exchange system comprises an air pipeline 59 and a steam-water separator, wherein one end of the air pipeline 59 is connected to an air source, the other end of the air pipeline 59 sequentially penetrates through the fifth heat exchanger 40, the sixth heat exchanger 42 and the seventh heat exchanger 43 to be communicated with an inlet of the fuel cell 57, and the fifth heat exchanger 40, the sixth heat exchanger 42, the seventh heat exchanger 43 and the steam-water separator are respectively communicated with the third heat exchanger 22.
In this embodiment, a first branch pipe 53 is arranged on the hydrogen pipeline 52 between the end of the first heat exchanger 12 and the top end of the second heat exchanger 15, a first electromagnetic valve 13 is arranged on the first branch pipe 53, a second branch pipe 54 is arranged between the end of the first heat exchanger 12 and the end of the second heat exchanger 15, and a second electromagnetic valve 14 is arranged on the second branch pipe 54.
In this embodiment, a third branched pipe 55 is arranged on an air pipeline 59 between the tail end of the fifth heat exchanger 40 and the top end of the seventh heat exchanger 43, the third branched pipe 55 is provided with a seventh electromagnetic valve 44, a fourth branched pipe 56 is arranged on the air pipeline 59 between the tail end of the fifth heat exchanger 40 and the tail end of the seventh heat exchanger 43, and an eighth electromagnetic valve 45 is arranged on the fourth branched pipe 56.
In this embodiment, a first pressure reducing valve 1, a first pressure sensor 2, a first temperature sensor 3, a second pressure reducing valve 4, a second pressure sensor 5, a second temperature sensor 6, a third pressure reducing valve 7, a third pressure sensor 8, a third temperature sensor 9, a dry filter 10, and a first humidifier 11 are sequentially disposed on the hydrogen pipe 52 between the inlet of the hydrogen pipe 52 and the first heat exchanger 12, and a fourth pressure reducing valve 21, a fourth pressure sensor 19, and a fourth temperature sensor 20 are disposed on the hydrogen pipe 52 between the end of the second heat exchanger 15 and the inlet of the fuel cell 57.
In this embodiment, the second filter 34, the air compressor 33, the sixth temperature sensor 32, the sixth pressure sensor 31, the first filter 30, the second humidifier 29, the sixth pressure reducing valve 35, the seventh temperature sensor 36, and the seventh pressure sensor 37 are sequentially disposed on the pipe between the inlet of the air pipe 59 and the top end of the fifth heat exchanger 40, and the fifth pressure reducing valve 27, the fifth pressure sensor 26, and the fifth temperature sensor 25 are disposed on the air pipe 59 between the end of the seventh heat exchanger 43 and the inlet of the fuel cell 57.
In this embodiment, the pipelines between the sixth heat exchanger 42, the seventh heat exchanger 43, the steam-water separator 24 and the outlet of the third heat exchanger 22 are respectively provided with a fifth electromagnetic valve 38, a sixth electromagnetic valve 39 and a ninth electromagnetic valve 48, and the outlet of the third heat exchanger 22 is provided with a second water pump 49.
In this embodiment, the pipelines between the outlets of the eighth heat exchanger 47, the second heat exchanger 15 and the third heat exchanger 22 are respectively provided with a third electromagnetic valve 16 and a fourth electromagnetic valve 17, and the pipeline at the outlet of the third heat exchanger 22 is further provided with a first water pump 18.
In this embodiment, a third water pump 50 is arranged on a pipeline at the outlet of the fourth heat exchanger 23, and a fourth water pump 51 is arranged on a pipeline between the outlet of the third heat exchanger 22 and the fourth heat exchanger 23.
In this embodiment, a fifth branch pipe 58 is disposed on the hydrogen pipe 52 between the outlet of the fuel cell 57 and the third pressure reducing valve 7, and an air pump 46 is disposed on the fifth branch pipe 58.
In this embodiment, the outlet of the fuel cell 57 is communicated with the steam-water separator 24 through a pipeline.
The system main body generates cooling liquid in a certain temperature range through a refrigerating unit; the temperature of the fuel cell body, the anode gas hydrogen and the cathode gas oxygen is controlled by the cooling liquid. The refrigerating unit enters the fuel cell body through pump circulation to control the temperature of the fuel cell body, and is connected with the hydrogen gas heat exchange module to finally realize the temperature control of the hydrogen gas at different times through the heat exchanger. The refrigerating unit is connected with the air temperature control module, and the temperature of the air is finally controlled by passing through the heater for different time. The refrigerating unit is connected with the tail gas treatment module to realize steam-water separation through condensation of the tail gas module. The final testing system realizes temperature control of the fuel cell body and the cathode and anode gases and tail gas treatment; meanwhile, the system has the cathode and anode gas treatment function.
Claims (10)
1. A fuel cell temperature control test system is characterized in that: the system comprises a refrigerating unit, a third heat exchanger, and a hydrogen heat exchange system, a fuel cell heat exchange system and an air heat exchange system which are connected with the refrigerating unit and the third heat exchanger respectively, wherein the refrigerating unit and the third heat exchanger are communicated with each other, the hydrogen heat exchange system comprises a hydrogen pipeline, one end of the hydrogen pipeline is connected with a hydrogen source, the other end of the hydrogen pipeline is connected to the fuel cell heat exchange system, the hydrogen pipeline sequentially passes through a first heat exchanger, an eighth heat exchanger and a second heat exchanger, and the first heat exchanger, the eighth heat exchanger and the second heat exchanger are communicated with the third heat exchanger through pipelines respectively;
the fuel cell heat exchange system comprises a fourth heat exchanger and a fuel cell, the third heat exchanger is communicated with the fourth heat exchanger, the fourth heat exchanger penetrates through the fuel cell through a pipeline, and an outlet of the hydrogen pipeline is connected to an inlet of the fuel cell;
the air heat exchange system comprises an air pipeline and a steam-water separator, one end of the air pipeline is connected to an air source, the other end of the air pipeline sequentially penetrates through a fifth heat exchanger, a sixth heat exchanger and a seventh heat exchanger to be communicated with an inlet of the fuel cell, and the fifth heat exchanger, the sixth heat exchanger, the seventh heat exchanger and the steam-water separator are respectively communicated with a third heat exchanger.
2. The fuel cell temperature control test system according to claim 1, characterized in that: the hydrogen pipeline between the tail end of the first heat exchanger and the top end of the second heat exchanger is provided with a first branch pipe, the first branch pipe is provided with a first electromagnetic valve, a second branch pipe is arranged between the tail end of the first heat exchanger and the tail end of the second heat exchanger, and the second branch pipe is provided with a second electromagnetic valve.
3. The fuel cell temperature control test system according to claim 2, characterized in that: and a third branch pipe is arranged on an air pipeline between the tail end of the fifth heat exchanger and the top end of the seventh heat exchanger, a seventh electromagnetic valve is arranged on the third branch pipe, a fourth branch pipe is arranged on the air pipeline between the tail end of the fifth heat exchanger and the tail end of the seventh heat exchanger, and a seventh electromagnetic valve is arranged on the fourth branch pipe.
4. The fuel cell temperature control test system according to claim 3, characterized in that: the hydrogen gas pipeline is provided with a first pressure reducing valve, a first pressure sensor, a first temperature sensor, a second pressure reducing valve, a second pressure sensor, a second temperature sensor, a third pressure reducing valve, a third pressure sensor, a third temperature sensor, a drying filter and a first humidifier in sequence between the hydrogen gas pipeline inlet and the first heat exchanger, and a fourth pressure reducing valve, a fourth pressure sensor and a fourth temperature sensor are arranged on the hydrogen gas pipeline between the tail end of the second heat exchanger and the fuel cell inlet.
5. The fuel cell temperature control test system according to claim 4, characterized in that: and a second filter, an air compressor, a sixth temperature sensor, a sixth pressure sensor, a first filter, a second humidifier, a sixth pressure reducing valve, a seventh temperature sensor and a seventh pressure sensor are sequentially arranged on the pipeline between the air pipeline inlet and the top end of the fifth heat exchanger, and a fifth pressure reducing valve, a fifth pressure sensor and a fifth temperature sensor are arranged on the air pipeline between the tail end of the seventh heat exchanger and the fuel cell inlet.
6. The fuel cell temperature control test system according to claim 5, characterized in that: and pipelines between the sixth heat exchanger, the seventh heat exchanger, the steam-water separator and the outlet of the third heat exchanger are respectively provided with a fifth electromagnetic valve, a sixth electromagnetic valve and a ninth electromagnetic valve, and the outlet of the third heat exchanger is provided with a second water pump.
7. The fuel cell temperature control test system according to claim 6, characterized in that: and a third electromagnetic valve and a fourth electromagnetic valve are respectively arranged on pipelines among the eighth heat exchanger, the second heat exchanger and the third heat exchanger, and a first water pump is also arranged on the pipeline at the outlet of the third heat exchanger.
8. The fuel cell temperature control test system according to claim 7, characterized in that: and a third water pump is arranged on a pipeline at the outlet of the fourth heat exchanger, and a fourth water pump is arranged on a pipeline between the outlet of the third heat exchanger and the fourth heat exchanger.
9. The fuel cell temperature control test system according to claim 8, characterized in that: and a fifth branch pipe is arranged on a hydrogen pipeline between the outlet of the fuel cell and the third pressure reducing valve, and an air pump is arranged on the fifth branch pipe.
10. The fuel cell temperature control test system according to claim 9, characterized in that: the outlet of the fuel cell is communicated with the steam-water separator through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922219544.8U CN210668551U (en) | 2019-12-12 | 2019-12-12 | Fuel cell temperature control test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922219544.8U CN210668551U (en) | 2019-12-12 | 2019-12-12 | Fuel cell temperature control test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210668551U true CN210668551U (en) | 2020-06-02 |
Family
ID=70822927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922219544.8U Active CN210668551U (en) | 2019-12-12 | 2019-12-12 | Fuel cell temperature control test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210668551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300709A (en) * | 2021-12-28 | 2022-04-08 | 上海恒劲动力科技有限公司 | Fuel cell and thermal management control system thereof |
-
2019
- 2019-12-12 CN CN201922219544.8U patent/CN210668551U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300709A (en) * | 2021-12-28 | 2022-04-08 | 上海恒劲动力科技有限公司 | Fuel cell and thermal management control system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201289435Y (en) | Test stand for heat dispersion of radiator | |
| CN111947952B (en) | Fuel cell humidifier test system and test method | |
| CN106532085B (en) | Apparatus and method for controlling humidification amount of membrane humidifier for fuel cell | |
| CN103487269B (en) | A kind of capacity-variable type cold water unit test system | |
| CN107908209A (en) | A kind of fuel battery test platform and its temperature and humidity control system | |
| CN102175714A (en) | Heat radiator and fan performance testing system | |
| CN108615911A (en) | A kind of vehicle fuel battery hydro-thermal management system and its control method | |
| CN109728331A (en) | One proton exchanging film fuel battery dynamic performance testing system and its working method | |
| CN112310441B (en) | Temperature and humidity control system for fuel cell reaction gas | |
| CN112271311A (en) | Control system and method of fuel cell | |
| CN107591548A (en) | A kind of fuel cell humidifier test platform | |
| CN209783927U (en) | Fuel cell membrane humidifier test system | |
| CN210668551U (en) | Fuel cell temperature control test system | |
| CN114152458A (en) | Fuel cell air humidifier performance testing device and method | |
| CN212903939U (en) | Humidifier performance test system | |
| CN210859155U (en) | Testing device of gas circulating pump | |
| CN110578679A (en) | Testing device of gas circulating pump | |
| CN212874556U (en) | Air supply control system for testing fuel cell | |
| CN214916177U (en) | Humidifying device of low-pressure damp-heat test box | |
| CN105116011A (en) | Test system for heat and moisture transfer properties of porous dielectric slab for fuel cell humidifier | |
| CN213520054U (en) | Off-line calibration rack for fuel cell hydrogen system | |
| CN115290364A (en) | Test system of humidifier for fuel cell engine | |
| CN209327082U (en) | Specimen preprocessing stowing | |
| CN110797557B (en) | Fuel cell air tightness and purging detection control device and detection control method | |
| CN113299956A (en) | Fuel cell engine test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |