CN110173904A - Heat pipe-type gasifier - Google Patents
Heat pipe-type gasifier Download PDFInfo
- Publication number
- CN110173904A CN110173904A CN201910510925.3A CN201910510925A CN110173904A CN 110173904 A CN110173904 A CN 110173904A CN 201910510925 A CN201910510925 A CN 201910510925A CN 110173904 A CN110173904 A CN 110173904A
- Authority
- CN
- China
- Prior art keywords
- heat
- heat pipe
- finned tube
- pipe
- condensation segment
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Abstract
The present invention relates to gasifier field, specifically heat pipe-type gasifier, including finned tube, heat pipe and heat source, the condensation segment of the heat pipe and the finned tube type are at heat exchange structure, the evaporator section of the heat pipe and heat source formation heat exchange structure.Heat pipe-type gasifier provided by the invention, the condensation segment that heat makes the liquid in heat pipe be changed into steam and flow to heat pipe is drawn from heat source by the evaporator section of finned tube, the condensation segment and finned tube type of heat pipe are at heat exchange, effectively slow down the phenomenon that finned tube freezes, it ensure that the gasification efficiency of liquid phase medium, to solve the air-heating type gasifier of the prior art, it inevitably will appear icing phenomenon after being used for a long time, so that the technical issues of the gasification efficiency decline of gasifier.
Description
Technical field
The present invention relates to gasifier fields, specifically heat pipe-type gasifier.
Background technique
Gasifier is the equipment for converting liquid phase medium to gas phase media, and the structure of air-heating type gasifier therein is simpler
Single, core structure is concatenated finned tube.When entrance to its export direction liquid relief of liquid phase medium by finned tube, liquid phase is situated between
Matter absorbs the heat in air by the tube wall and fin of finned tube 1, so that the temperature of liquid phase medium reaches boiling point after increasing,
Liquid phase medium is changed into gas phase media in finned tube as a result,.
The air-heating type gasifier of the prior art inevitably will appear icing phenomenon after being used for a long time, so that
The gasification efficiency of gasifier declines.
Summary of the invention
For the air-heating type gasifier for solving the prior art, it inevitably will appear icing phenomenon after being used for a long time, from
And the technical issues of gasification efficiency of gasifier is declined, the present invention provide heat pipe-type gasifier.
According to an aspect of the present invention, heat pipe-type gasifier, including finned tube, heat pipe and heat source, the heat pipe are provided
Condensation segment and the finned tube type at heat exchange structure, the evaporator section of the heat pipe and the heat source form heat exchange structure.
Further, the heat source is solar heat-collection plate, thermal-arrest portion and the heat pipe of the solar heat-collection plate
Evaporator section forms heat exchange structure.
Further, the heat source is heating agent conduit, and circulate heat-conducting medium in the heating agent conduit, the evaporation of the heat pipe
Section forms heat exchange structure with the heat-conducting medium.
Further, the evaporator section of the heat pipe is arranged in the inner cavity of the heating agent conduit or the steaming of the heat pipe
Hair section is arranged on the outer tube wall of the heating agent conduit.
Further, the heat-conducting medium is conduction oil or water or vapor or inert gas or air.
Further, recessed groove is set on the fin of the finned tube, and the condensation segment of the heat pipe is arranged in the recess
In slot.
Further, the extending direction of the recessed groove is identical as the extending direction of the finned tube, alternatively, the recess
The extending direction of the extending direction of slot and the finned tube is in the angle less than 90 °.
Further, mounting hole is set on the tube wall of the finned tube, and the condensation segment of the heat pipe is arranged in the installation
In hole.
Further, antipriming pipe is set in the inner cavity of the finned tube, and the condensation segment of the heat pipe is arranged described porous
In the pore of pipe.
Further, radiating fin is set on the outer tube wall of the antipriming pipe.
Heat pipe-type gasifier provided by the invention draws heat from heat source by the evaporator section of finned tube and makes in heat pipe
Liquid be changed into steam and flow to the condensation segment of heat pipe, the condensation segment and finned tube type of heat pipe effectively subtract at heat exchange
The phenomenon that finned tube freezes is delayed, ensure that the gasification efficiency of liquid phase medium, to solve the air temperature type gasification of the prior art
Device inevitably will appear icing phenomenon after being used for a long time, so that the technology that the gasification efficiency of gasifier declines is asked
Topic.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of 2 formula gasifier of heat pipe provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of 2 formula gasifier of heat pipe provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of heat pipe 2 provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of finned tube 1 provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of finned tube 1 provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of finned tube 1 provided in an embodiment of the present invention.
Specific embodiment
For the air-heating type gasifier for solving the prior art, it inevitably will appear icing phenomenon after being used for a long time, from
And the technical issues of gasification efficiency of gasifier is declined, the present invention provide heat pipe-type gasifier.
Referring to Fig. 1, heat pipe-type gasifier, including finned tube 1, heat pipe 2 and heat source 3, the condensation segment 21 and finned tube of heat pipe 2
1 forms heat exchange structure, and the evaporator section 22 and heat source 3 of heat pipe 2 form heat exchange structure.
Wherein, heat pipe 2 includes outer housing, liquid-sucking core and flow cavity, and liquid-sucking core is fitted on the inner wall of outer housing, liquid-sucking core
The cavity inwardly surrounded is flow cavity；Filling is for rising liquid, when the temperature of liquid reaches boiling point, the liquid in flow cavity
Body is changed into steam by liquid, which flows in flow cavity；Heat source 3 and heat pipe 2 form heat exchange structure, heat pipe 2 by
The position that heat source 3 heats is evaporator section 22, and liquid above-mentioned is changed into steam in evaporator section 22, and the steam is along flow cavity
It is flow to the condensation segment 21 that 22 distant place of evaporator section is set, condensation segment 21 and finned tube 1 form heat exchange structure；In finned tube 1
Liquid phase medium temperature lower than the steam in condensation segment 21 temperature so that the steam temperature in condensation segment 21 declines,
Steam is again transformed into liquid；After liquid is absorbed by the capillarity of liquid-sucking core, in the inside of liquid-sucking core to evaporator section 22
Flowing.
It should be understood that in the structure of heat pipe 2 itself, as long as forming the temperature difference in one end of heat pipe 2 and its other end,
The steam in heat pipe 2 is enabled to generate flowing.
After heat source 3 heats the evaporator section 22 of heat pipe 2, the flow of vapor in heat pipe 2 is to condensation segment 21, so that heat pipe 2
Condensation segment 21 finned tube 1 is heated.In other words, after the flow of vapor to condensation segment 21 in heat pipe 2, finned tube 1
Steam in interior liquid phase medium and heat pipe 2 forms heat exchange, so that the temperature of the liquid phase medium in finned tube 1 tends to increase,
And the temperature of the steam in heat pipe 2 tends to decline and condense.At this point, there are three types of states for finned tube 1 tool itself:
Under the first state, liquid phase medium has just been injected into finned tube 1, and the temperature of finned tube 1 itself tends to decline, but
It is the heat effect of the condensation segment 21 by heat pipe 2, finned tube 1 can draw heat from the condensation segment 21 of heat pipe 2, to reduce
Finned tube 1 draws the pressure of heat, slows down the freezing time of finned tube 1, ensure that the gasification efficiency of liquid phase medium.
In second under state, liquid phase medium is persistently injected into finned tube 1, and the temperature of finned tube 1 itself tends to decline, wing
There is frosting, icing phenomenon under prolonged work in the outer surface of piece pipe 1；Meanwhile the evaporator section 22 of heat pipe 2 is from heat source 3
The heat drawn is endlessly transmitted to the condensation segment 21 of heat pipe 2, so that the condensation segment 21 of heat pipe 2 is lasting with finned tube 1
Heat exchange is formed, so as to slow down the phenomenon that finned tube 1 continues solidifying frost, freezes, ensure that the gasification efficiency of liquid phase medium.
Under the third state, in two adjacent finned tubes 1, tend to the finned tube 1 of liquid phase medium entrance, by liquid
The prolonged heat of phase medium is drawn, so that the finned tube 1 of the liquid phase medium entrance freezes completely, and tends to gas phase media outlet
Finned tube 1, itself not yet freeze or icing condition just occur, at this point, liquid phase medium is changed into the conversion of gas phase media
Point is moved to by the finned tube 1 for tending to liquid phase medium entrance to be tended on the finned tube 1 of gas phase media outlet, the evaporator section of heat pipe 2
22 heats drawn from heat source 3 are still endlessly transmitted to the condensation segment 21 of heat pipe 2, so that the condensation segment 21 of heat pipe 2
It is lasting to form heat exchange with the finned tube 1 for tending to gas phase media outlet, so as to preferably guarantee that liquid phase medium is tending to
The sufficient heat of comparison can be drawn in the finned tube 1 of gas phase media outlet, ensure that the gasification efficiency of liquid phase medium.
Therefore, heat pipe-type gasifier provided by the invention draws heat from heat source by the evaporator section of finned tube and makes
Liquid in heat pipe is changed into steam and flow to the condensation segment of heat pipe, and the condensation segment and finned tube type of heat pipe have at heat exchange
Effect slows down the phenomenon that finned tube freezes, and ensure that the gasification efficiency of liquid phase medium, to solve the air temperature of the prior art
Formula gasifier inevitably will appear icing phenomenon after being used for a long time, so that the gasification efficiency of gasifier declined
Technical problem.
Preferably, heat source 3 is solar heat-collection plate 31, the thermal-arrest portion of solar heat-collection plate 31 and the evaporator section 22 of heat pipe 2
Form heat exchange structure.
Wherein, solar heat-collection plate 31 can be set at the top of 2 formula gasifier of heat pipe, in order to which sunlight preferably irradiates
On solar heat-collection plate 31；The evaporator section 22 of heat pipe 2 is arranged in the heat collector cavity of solar heat-collection plate 31, so that solar energy collection
After the radiation energy of sunlight is converted thermal energy by hot plate 31, thermal energy collecting is in the heat-conducting medium of heat collector cavity.It should be understood that
The heat-conducting medium filled in the heat collector cavity of solar heat-collection plate 31, specific heat are preferably greater than the specific heat of air, so that
Heat in heat collector cavity is sufficient, and what can be continued forms heat exchange with heat pipe 2.Heat-conducting medium includes but is not limited to conduction oil or water
Or aqueous solution.Such as: solar water heater, the interior heat-conducting medium filled of heat collector cavity therein is water.Then, leading in heat collector cavity
The evaporator section 22 of thermal medium and heat pipe 2 forms heat exchange structure, and heat-conducting medium heats the evaporator section 22 of heat pipe 2, thus
Form the temperature end of heat pipe 2；Meanwhile the condensation segment 21 of heat pipe 2 is arranged on finned tube 1, liquid phase medium and heat in finned tube 1
The condensation segment 21 of pipe 2 forms heat exchange structure, to form the low-temperature end of heat pipe 2；In heat pipe 2, liquid absorption comes from the sun
Steam can be changed into after the heat of collecting plate 31, steam flows to the condensation segment 21 of heat pipe 2 in the flow cavity of heat pipe 2, leads to
It crosses the low temperature of condensation segment 21 and becomes liquid again；Liquid enters liquid-sucking core by the capillarity of the liquid-sucking core of heat pipe 2
Inside complete the diabatic process of heat pipe 2 and in the evaporator section 22 of the internal flow of liquid-sucking core to heat pipe 2.
Preferably, heat source 3 is heating agent conduit 32, and circulate in heating agent conduit 32 heat-conducting medium, the evaporator section 22 of heat pipe 2 with lead
Thermal medium forms heat exchange structure.
Wherein, the bottom of 2 formula gasifier of heat pipe should be arranged in heating agent conduit 32, be preferably disposed at ground surface hereinafter,
In order to the laying of heating agent conduit 32.In heating agent conduit 32, the temperature of heating agent is equal to or more than air themperature, heating agent conduit 32
The evaporator section 22 of interior heating agent and heat pipe 2 forms heat exchange structure, and heating agent heats the evaporator section 22 of heat pipe 2, thus shape
At the temperature end of heat pipe 2；Meanwhile the liquid phase medium and heat pipe on finned tube 1, in finned tube 1 is arranged in the condensation segment 21 of heat pipe 2
2 condensation segment 21 forms heat exchange structure, to form the low-temperature end of heat pipe 2；In heat pipe 2, liquid absorption is from heating agent
It is changed into steam after heat, steam flows to the condensation segment 21 of heat pipe 2 in the flow cavity of heat pipe 2, passes through condensation segment 21
Low temperature and become liquid again；Liquid enters the inside of liquid-sucking core by the capillarity of the liquid-sucking core of heat pipe 2, and is inhaling
The internal flow of wick-containing completes the diabatic process of heat pipe 2 to the evaporator section 22 of heat pipe 2.
Preferably, the evaporator section 22 of heat pipe 2 is arranged in the inner cavity of heating agent conduit 32 or the evaporator section 22 of heat pipe 2 is set
It sets on the outer tube wall of heating agent conduit 32.
Such as: the soaking plate on heat transfer plate and corresponding heat pipe 2 on heating agent conduit 32, heat pipe 2 pass through its soaking plate
It is mounted on heat transfer plate, the heat exchange area of heat pipe 2 Yu heating agent conduit 32 can be increased.For another example: peace is set on heating agent conduit 32
Hole is filled, articulating members are set on heat pipe 2, and the evaporator section 22 of heat pipe 2 is inserted into the interior of heating agent conduit 32 by mounting hole
In chamber, and it is fixed on heating agent conduit 32 by articulating members.
Further, heat-conducting medium is conduction oil or water or vapor or inert gas or air.It should be understood that
It is that heating agent conduit 32 should be communicated with external supercharging device, heat-conducting medium is under the action of supercharging device, along heating agent conduit
32 inner cavity flowing, so that the evaporator section 22 of the lasting formation opposite heat tube 2 of heat-conducting medium is heated.
Further, recessed groove 11 is set on the fin of finned tube 1, and the condensation segment 21 of heat pipe 2 is arranged in recessed groove 11.
Wherein, the evaporator section 22 of heat pipe 2 is arranged in recessed groove 11, so that the fin of heat pipe 2 and finned tube 1 forms heat
Exchange, can effectively improve the temperature of fin, slow down the icing phenomenon of fin, so that finned tube 1 itself keeps good work
Make efficiency.
Preferably, the extending direction of recessed groove 11 is identical as the extending direction of finned tube 1, alternatively, the extension of recessed groove 11
The extending direction of direction and finned tube 1 is in the angle less than 90 °.Wherein, the extension of the extending direction of recessed groove 11 and finned tube 1
Direction is identical, is conducive to finned tube 1 and reduces processing cost in process.Such as: when the aluminium profiles that finned tube 1 is extrusion forming
Material is made, and recessed groove 11 can be during aluminum profile manufactures, the extrusion forming using mold, to reduce secondary operation
The workload of aluminum profile.The extending direction of recessed groove 11 and the extending direction of finned tube 1 have certain angle, can make heat
The condensation segment 21 of pipe 2 tends to the tube wall of finned tube 1, thus the wing of the inclined heating finned tube 1 of the condensation segment 21 for forming heat pipe 2
Piece, when multiple inclined heat pipes 2 heat the fin of finned tube 1, the condensation segment 21 of multiple heat pipes 2 makes the fin of finned tube 1
What is be heated is more balanced.
Further, mounting hole 12 is set on the tube wall of finned tube 1, and the condensation segment 21 of heat pipe 2 is arranged in mounting hole 12.
Wherein, the condensation segment 21 of heat pipe 2 is arranged in mounting hole 12, so that the tube wall of heat pipe 2 and finned tube 1 forms hot friendship
It changes, can effectively improve the temperature of the tube wall of finned tube 1, slow down the icing phenomenon of the tube wall of finned tube 1, so that finned tube 1
Itself keeps good working efficiency.
It should be understood that under the conditions of reconcilable, mounting hole 12 is set on the tube wall of finned tube 1, and it is above-mentioned
Recessed groove 11 is arranged on the fin of finned tube 1 to be combined with each other.
Further, antipriming pipe 13 is set in the inner cavity of finned tube 1, and antipriming pipe 13 is arranged in the condensation segment 21 of heat pipe 2
In pore.
Wherein, antipriming pipe 13 is arranged in the inner cavity of finned tube 1, when in the pore that heat pipe 2 is inserted into antipriming pipe 13, heat
The condensation segment 21 of pipe 2 and the tube wall of antipriming pipe 13 form first layer heat exchange structure, and the tube wall of antipriming pipe 13 is again and in finned tube 1
Liquid phase medium formed second layer heat exchange structure；Or antipriming pipe 13 is arranged in the inner cavity of finned tube 1, when heat pipe 2 is inserted
When entering in the pore of antipriming pipe 13, the exposed outside in antipriming pipe 13 of the condensation segment 21 of heat pipe 2, so that the condensation of heat pipe 2
Section 21 directly forms heat exchange structure with liquid phase medium.
It should be understood that under the conditions of reconcilable, antipriming pipe 13 is set in the inner cavity of finned tube 1, be able to
Mounting hole 12 is set on the tube wall of finned tube 1, and recessed groove 11 is set on the fin of finned tube 1 and is combined with each other.
Further, radiating fin is set on the outer tube wall of antipriming pipe 13.Heat pipe 2 above-mentioned condensation segment 21 with it is porous
The tube wall of pipe 13 forms first layer heat exchange structure, and the tube wall of antipriming pipe 13 forms second with the liquid phase medium in finned tube 1 again
On the basis of layer heat exchange structure, radiating fin preferably is set on the outer tube wall of antipriming pipe 13, is situated between in order to increase liquid phase
The heat exchange area of matter and antipriming pipe 13.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure transformation made by description of the invention and accompanying drawing content is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (10)
1. heat pipe-type gasifier, which is characterized in that including finned tube, heat pipe and heat source, the condensation segment of the heat pipe and the wing
Piece pipe forms heat exchange structure, and the evaporator section of the heat pipe and the heat source form heat exchange structure.
2. gasifier according to claim 1, which is characterized in that the heat source is solar heat-collection plate, the solar energy
The thermal-arrest portion of collecting plate and the evaporator section of the heat pipe form heat exchange structure.
3. gasifier according to claim 1, which is characterized in that the heat source is heating agent conduit, in the heating agent conduit
Circulate heat-conducting medium, and the evaporator section of the heat pipe and the heat-conducting medium form heat exchange structure.
4. gasifier according to claim 3, which is characterized in that the evaporator section of the heat pipe is arranged in the heating agent conduit
Inner cavity in or the evaporator section of the heat pipe be arranged on the outer tube wall of the heating agent conduit.
5. gasifier according to claim 3, which is characterized in that the heat-conducting medium is that conduction oil or water or water steam
Gas or inert gas or air.
6. gasifier according to claim 2 or 3, which is characterized in that recessed groove, institute are arranged on the fin of the finned tube
The condensation segment for stating heat pipe is arranged in the recessed groove.
7. gasifier according to claim 6, which is characterized in that the extending direction of the recessed groove and the finned tube
Extending direction is identical, alternatively, the extending direction of the extending direction of the recessed groove and the finned tube is in the angle less than 90 °.
8. gasifier according to claim 2 or 3, which is characterized in that mounting hole, institute are arranged on the tube wall of the finned tube
State the condensation segment setting of heat pipe in the mounting hole.
9. gasifier according to claim 2 or 3, which is characterized in that antipriming pipe, institute are arranged in the inner cavity of the finned tube
The condensation segment for stating heat pipe is arranged in the pore of the antipriming pipe.
10. gasifier according to claim 9, which is characterized in that radiating fin is arranged on the outer tube wall of the antipriming pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910510925.3A CN110173904A (en) | 2019-06-13 | 2019-06-13 | Heat pipe-type gasifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910510925.3A CN110173904A (en) | 2019-06-13 | 2019-06-13 | Heat pipe-type gasifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110173904A true CN110173904A (en) | 2019-08-27 |
Family
ID=67697180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910510925.3A Pending CN110173904A (en) | 2019-06-13 | 2019-06-13 | Heat pipe-type gasifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110173904A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506127A (en) * | 2018-12-21 | 2019-03-22 | 航天科工哈尔滨风华有限公司 | Horizontal heat pipe liquefied natural gas gasifying device |
-
2019
- 2019-06-13 CN CN201910510925.3A patent/CN110173904A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506127A (en) * | 2018-12-21 | 2019-03-22 | 航天科工哈尔滨风华有限公司 | Horizontal heat pipe liquefied natural gas gasifying device |
| CN109506127B (en) * | 2018-12-21 | 2020-10-30 | 航天科工哈尔滨风华有限公司 | Horizontal heat pipe liquefied natural gas gasifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190827 |
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| WD01 | Invention patent application deemed withdrawn after publication |