CN107702383A - A kind of direct-expansion type evaporator of all-fresh air unit - Google Patents
A kind of direct-expansion type evaporator of all-fresh air unit Download PDFInfo
- Publication number
- CN107702383A CN107702383A CN201710919552.6A CN201710919552A CN107702383A CN 107702383 A CN107702383 A CN 107702383A CN 201710919552 A CN201710919552 A CN 201710919552A CN 107702383 A CN107702383 A CN 107702383A
- Authority
- CN
- China
- Prior art keywords
- heat pipe
- direct
- pipe
- expansion type
- type evaporator
- 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.)
- Withdrawn
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Classifications
-
- 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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
-
- 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
- F28D15/0266—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 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
-
- 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
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
- F28F9/0131—Auxiliary supports for elements for tubes or tube-assemblies formed by plates
-
- 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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
- F25B2339/022—Evaporators constructed from a pair of plates forming a space in which is located a refrigerant carrying coil
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention discloses a kind of direct-expansion type evaporator of all-fresh air unit,It includes air channel and direct-expansion type evaporator,Also wrap at least one heat pipe assembly,The heat pipe assembly includes the evaporation coil of at least two heat pipe evaporation tube compositions,The condenser coil of at least two heat pipe condenser pipe compositions,Heat pipe steam pipe,And heat pipe liquid back pipe,The evaporation coil is arranged on the inlet side of the direct-expansion type evaporator in the air channel,The condenser coil is arranged on the air side of the direct-expansion type evaporator in the air channel,The evaporation coil,The condenser coil,The heat pipe steam pipe and the heat pipe liquid back pipe form a heat pipe circuit and the pipeline of inside forms an airtight cavity,Due in the air conditioner with fresh air ventilator group of the present invention,The temperature of direct-expansion type evaporator air flow is lowered into by the heat pipe circuit of heat pipe assembly,Improve the running environment of vapour compression refrigeration system,Extension device compressor service life.
Description
Technical field
The present invention relates to evaporator device field, the direct-expansion type of all-fresh air unit particularly higher for chilling temperature steams
Send out device device.
Background technology
In current production activity, commonly using vapor-compression chiller, the refrigerant of refrigeration unit is in evaporator
Middle expansion vaporization produces cold.Some occasions, it is referred to as direct come cooling treatment air, industry directly to produce cold with evaporator
Expansion cooling refrigeration machine, referred to as straight swollen unit.
Under some conditions, for example the air intake of evaporator is entirely outdoor fresh air, and temperature is very high, and refrigeration system is in severe work
Run, have a negative impact under condition, finally result in the shortening of compressor service life.
The content of the invention
A kind of direct-expansion type evaporation of the all-fresh air unit used it is an object of the invention to provide suitable temperature in the case of higher
Device device.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
A kind of direct-expansion type evaporator of all-fresh air unit, its direct-expansion type evaporation for including air channel and being arranged in the air channel
Device, also wraps at least one heat pipe assembly, and the heat pipe assembly includes the evaporation coil, at least of at least two heat pipe evaporation tubes compositions
The condenser coil of two heat pipe condenser pipe compositions, the heat pipe steam pipe for being respectively communicated with the evaporation coil and the condenser coil,
And it is respectively communicated with the heat pipe liquid back pipe of the evaporation coil and the condenser coil, the evaporation coil and the condenser coil
It is arranged in the air channel, the evaporation coil is arranged on the inlet side of the direct-expansion type evaporator, and the condenser coil is set
Put in the air side of the direct-expansion type evaporator, the evaporation coil, the condenser coil, the heat pipe steam pipe and the heat
Pipe liquid back pipe forms a heat pipe circuit and the pipeline of inside forms an airtight cavity.
Preferably, the heat pipe steam pipe and the heat pipe liquid back pipe are horizontally disposed, have on the heat pipe liquid back pipe
Recessed bending section, the height of the upper tube wall of the bending section are less than the height of the lower tube wall of the heat pipe liquid back pipe other parts
Degree.
Preferably, working medium is provided with the airtight cavity, the airtight cavity has described for vacuumizing and being filled with
The interface of working medium.
Preferably, it is provided with outside the evaporation coil outside evaporation tube fin, the condenser coil and is provided with condenser pipe fin.
It is further preferred that the direct-expansion type evaporator has heat exchanger tube fin, the heat exchanger tube fin and the evaporation
Pipe fin, condenser pipe fin are not connected to.
It is further preferred that the heat pipe assembly is provided with multiple, stacked distribution from top to bottom.
It is further preferred that multiple heat pipe assembly the evaporation tube fin be connected with each other, multiple heat pipe assembly it is described
Condenser pipe fin is connected with each other.
Preferably, the mounting bracket for supporting the heat pipe assembly is provided with the air channel.
It is further preferred that being provided with shrouding on the mounting bracket, the shrouding is by between mounting bracket and the inwall in air channel 1
Space is blocked.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
Due in the air conditioner with fresh air ventilator group of the present invention, direct-expansion type evaporator gas is lowered into by the heat pipe circuit of heat pipe assembly
The temperature of stream, improve the running environment of vapour compression refrigeration system, extension device compressor service life.
Brief description of the drawings
Accompanying drawing 1 is principle schematic of the invention；
Accompanying drawing 2 is the schematic front view of the pipeline of embodiment one arrangement；
Accompanying drawing 3 is the schematic front view of the pipeline of embodiment two arrangement；
Accompanying drawing 4 is the schematic top plan view of structure of the present invention.
In the figures above：1st, air channel；21st, heat exchanger tube；22nd, heat exchanger tube fin；3rd, heat pipe evaporation tube；31st, evaporation tube fin；
4th, heat pipe condenser pipe；41st, condenser pipe fin；5th, heat pipe liquid back pipe；6th, heat pipe steam pipe；7th, mounting bracket；71st, shrouding.
Embodiment
The invention will be further described for shown embodiment below in conjunction with the accompanying drawings：
Embodiment one：Referring to shown in accompanying drawing 1,2,4, a kind of direct-expansion type evaporator of all-fresh air unit, it includes the He of air channel 1
The direct-expansion type evaporator being arranged in air channel 1, three heat pipe assembly are also wrapped,（In other embodiments, heat pipe assembly can adopt
Use any number）Heat pipe assembly includes evaporation coil, at least two heat pipe condenser pipes 4 that at least two heat pipe evaporation tubes 3 form
The condenser coil of composition, the heat pipe steam pipe 6 for being respectively communicated with evaporation coil and condenser coil, and be respectively communicated with evaporation coil with
The heat pipe liquid back pipe 5 of condenser coil, evaporation coil are arranged on the inlet side of direct-expansion type evaporator in air channel 1, and condenser coil is set
The air side of direct-expansion type evaporator in air channel 1, evaporation coil, condenser coil, heat pipe steam pipe 6 and heat pipe liquid back pipe 5 form
The pipeline of one heat pipe circuit and inside forms an airtight cavity.
Working medium is provided with airtight cavity, airtight cavity has the interface for being used for vacuumizing and be filled with working medium, the present embodiment
In working medium can as needed select suitable temperature ranges heat-pipe working medium.
It is provided with outside evaporation coil outside evaporation tube fin 31, condenser coil and is provided with condenser pipe fin 41.
Direct-expansion type evaporator includes heat exchanger tube 21 and heat exchanger tube fin 22, heat exchanger tube fin 22 and evaporation tube fin 31, cold
Solidifying pipe fin 41 is not connected to..Unconnected fin is beneficial to the operation of heat pipe.
Three heat pipe assembly stacked distribution from top to bottom.The evaporation tube fin 31 of multiple heat pipe assembly is connected with each other, multiple
The condenser pipe fin 41 of heat pipe assembly is connected with each other.
Both sides are separately provided for fixing the mounting bracket 7 of heat pipe assembly in air channel 1, and the mounting bracket 7 of side fixes heat pipe
Steam pipe 6 and heat pipe liquid back pipe 5, the mounting bracket 7 of opposite side fix the U of U-shaped elbow and the heat pipe condenser pipe 4 of heat pipe evaporation tube 3
Type elbow.Meanwhile direct-expansion type evaporator can also be fixed on mounting bracket 7 by the heat exchanger tube 21 of both sides.
In the present embodiment, multiple shroudings 71 are additionally provided with mounting bracket 7, shrouding 71 is by between mounting bracket 7 and air channel 1
Space is blocked so that by the air-flow in air channel 1 all between the mounting bracket 7 of both sides by, and all flow through heat-exchanging component and
Effective heat-transfer surface of direct-expansion type evaporator, improve heat exchange efficiency.
In the present embodiment, heat pipe assembly can be individually processed, it is live again by heat pipe assembly and direct-expansion type evaporator to using
Arrange on request and fixed.Or heat pipe assembly is first fixed together with direct-expansion type evaporator, then it is sent to using scene.
When the direct-expansion type vaporising device of the present embodiment is shut down, evaporation coil, condenser coil and direct-expansion type evaporator are in phase
In same air ambient, temperature is identical, and the working medium of inside heat pipe is in vehicle repair major balance.When the all-fresh air unit of the present embodiment
Direct-expansion type evaporator assemblies work when, the high air of outdoor temperature sequentially flows through：Evaporation coil, direct-expansion type evaporator, condensation
Coil pipe.The refrigerant of refrigeration machine vaporizes heat absorption in direct-expansion type evaporator, and temperature declines after air-flow flows through direct-expansion type evaporator, then
Condenser coil is flowed through, declines condenser coil temperature, the saturation gaseous working medium in condenser coil, which can be condensed, becomes liquid refrigerant,
Gather in condenser coil, saturated liquid working medium increase in condenser coil, flowing to heat pipe by heat pipe liquid back pipe 5 in Action of Gravity Field steams
Send out pipe 3.Because the saturation gaseous working medium in condenser coil tails off, the saturation gaseous working medium in evaporation coil can add to condensate pans
Pipe, while the saturated liquid working medium in evaporation coil can vaporize heat absorption, the working medium of vaporization still adds to condenser coil, so followed
Ring is continuous.Saturated liquid in evaporation coil can vaporize heat absorption, and outdoor air temperature after evaporation coil is reduced, entered back into
Direct-expansion type evaporator, it can so prevent the compressor into the too high injury device of temperature of direct-expansion type evaporator.
Embodiment two：Referring to shown in accompanying drawing 1,3,4, the present embodiment and embodiment one are essentially identical, and difference is：Heat
Pipe steam pipe 6 and heat pipe liquid back pipe 5 are horizontally disposed, have recessed bending section, the upper tube wall of bending section on heat pipe liquid back pipe 5
Height less than the other parts of heat pipe liquid back pipe 5 lower tube wall height.The full liquid refrigerant of a direct product, can ensure that steaming in bending section
The working medium of vaporization all enters condenser coil through superheater tube steam pipe 6 in quotation pipe.
Above-described embodiment compared with prior art, has advantages below：
1. due in the air conditioner with fresh air ventilator group of above-described embodiment, direct-expansion type evaporator air flow is lowered into by heat pipe assembly
Temperature, improve the running environment of vapour compression refrigeration system, the compressor service life of extension device.
2. evaporation coil, condenser coil, heat pipe steam pipe 6 and heat pipe liquid back pipe 5, which form a heat pipe circuit, to be caused
Working medium circulates in the loop, and heat exchange efficiency is higher, is adapted to the larger operating mode of internal-external temperature difference to use.
3. being arranged on by mounting bracket 7 in air channel 1 can ensure that air-flow by effective heat-exchange surface, improves heat exchange efficiency
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art's energy
Solution present disclosure much of that is simultaneously implemented according to this, and it is not intended to limit the scope of the present invention.It is all spiritual according to the present invention
The equivalent change or modification that essence is made, should all be included within the scope of the present invention.
Claims (9)
1. a kind of direct-expansion type evaporator of all-fresh air unit, its direct-expansion type for including air channel and being arranged in the air channel steams
Send out device, it is characterised in that：At least one heat pipe assembly is also wrapped, the heat pipe assembly includes what at least two heat pipe evaporation tubes formed
Evaporation coil, the condenser coil that at least two heat pipe condenser pipes form, it is respectively communicated with the evaporation coil and the condenser coil
Heat pipe steam pipe, and be respectively communicated with the heat pipe liquid back pipe of the evaporation coil and the condenser coil, the evaporation coil
It is arranged at the condenser coil in the air channel, the evaporation coil is arranged on the inlet side of the direct-expansion type evaporator,
The condenser coil is arranged on the air side of the direct-expansion type evaporator, the evaporation coil, the condenser coil, the heat pipe
Steam pipe and the heat pipe liquid back pipe form a heat pipe circuit and the pipeline of inside forms an airtight cavity.
A kind of 2. direct-expansion type evaporator of all-fresh air unit according to claim 1, it is characterised in that：The heat pipe
Steam pipe and the heat pipe liquid back pipe are horizontally disposed, have recessed bending section, the bending section on the heat pipe liquid back pipe
Upper tube wall height less than the heat pipe liquid back pipe other parts lower tube wall height.
A kind of 3. direct-expansion type evaporator of all-fresh air unit according to claim 1, it is characterised in that：It is described closed
Working medium is provided with cavity, the airtight cavity has the interface for being used for vacuumizing and be filled with the working medium.
A kind of 4. direct-expansion type evaporator of all-fresh air unit according to claim 1, it is characterised in that：The evaporation
It is provided with outside coil pipe outside evaporation tube fin, the condenser coil and is provided with condenser pipe fin.
A kind of 5. direct-expansion type evaporator of all-fresh air unit according to claim 4, it is characterised in that：It is described straight swollen
Formula evaporator has heat exchanger tube fin, and the heat exchanger tube fin is not connected to the evaporation tube fin, condenser pipe fin.
A kind of 6. direct-expansion type evaporator of all-fresh air unit according to claim 4, it is characterised in that：The heat pipe
Component is provided with multiple, stacked distribution from top to bottom.
A kind of 7. direct-expansion type evaporator of all-fresh air unit according to claim 6, it is characterised in that：Multiple heat pipes
The evaporation tube fin of component is connected with each other, and the condenser pipe fin of multiple heat pipe assembly is connected with each other.
A kind of 8. direct-expansion type evaporator of all-fresh air unit according to claim 1, it is characterised in that：The air channel
Inside it is provided with the mounting bracket for supporting the heat pipe assembly.
A kind of 9. direct-expansion type evaporator of all-fresh air unit according to claim 8, it is characterised in that：The installation
Shrouding is provided with frame, the shrouding blocks the space between mounting bracket and the inwall in air channel 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710919552.6A CN107702383A (en) | 2017-09-30 | 2017-09-30 | A kind of direct-expansion type evaporator of all-fresh air unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710919552.6A CN107702383A (en) | 2017-09-30 | 2017-09-30 | A kind of direct-expansion type evaporator of all-fresh air unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107702383A true CN107702383A (en) | 2018-02-16 |
Family
ID=61183339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710919552.6A Withdrawn CN107702383A (en) | 2017-09-30 | 2017-09-30 | A kind of direct-expansion type evaporator of all-fresh air unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107702383A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396740A (en) * | 2022-01-26 | 2022-04-26 | 四方科技集团股份有限公司 | Refrigerating system with dehumidification function |
| CN115540373A (en) * | 2022-09-21 | 2022-12-30 | 广州特域机电有限公司 | Energy-saving industrial water chiller |
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| CN201436493U (en) * | 2009-03-30 | 2010-04-07 | 雅士空调(广州)有限公司 | Heat pipe antifreeze type air conditioning unit |
| CN202561932U (en) * | 2012-04-25 | 2012-11-28 | 王康平 | Energy-saving and high-efficiency air conditioner of base station |
| CN202915780U (en) * | 2012-10-25 | 2013-05-01 | 北京德能恒信科技有限公司 | Split type multi-level heat pipe system |
| CN103256666A (en) * | 2013-05-15 | 2013-08-21 | 天津中德职业技术学院 | Independent primary air system provided with heat pipe exchanger and working method thereof |
| CN203501340U (en) * | 2013-08-13 | 2014-03-26 | 朱军 | Heat pump type afterheat recovery fresh air handling unit |
| CN103982958A (en) * | 2014-05-04 | 2014-08-13 | 南京师范大学 | Two-stage precooling dehumidification device and method |
| CN104776739A (en) * | 2014-01-13 | 2015-07-15 | 杭州三花研究院有限公司 | Heat pipe heat exchanger, evaporator component and heat pump clothes dryer |
| CN106403116A (en) * | 2016-11-25 | 2017-02-15 | 中国科学院理化技术研究所 | Integrated natural cooling machine room air conditioner system |
| CN207214529U (en) * | 2017-09-30 | 2018-04-10 | 苏州苏净安发空调有限公司 | A kind of direct-expansion type evaporator of all-fresh air unit |
-
2017
- 2017-09-30 CN CN201710919552.6A patent/CN107702383A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201436493U (en) * | 2009-03-30 | 2010-04-07 | 雅士空调(广州)有限公司 | Heat pipe antifreeze type air conditioning unit |
| CN202561932U (en) * | 2012-04-25 | 2012-11-28 | 王康平 | Energy-saving and high-efficiency air conditioner of base station |
| CN202915780U (en) * | 2012-10-25 | 2013-05-01 | 北京德能恒信科技有限公司 | Split type multi-level heat pipe system |
| CN103256666A (en) * | 2013-05-15 | 2013-08-21 | 天津中德职业技术学院 | Independent primary air system provided with heat pipe exchanger and working method thereof |
| CN203501340U (en) * | 2013-08-13 | 2014-03-26 | 朱军 | Heat pump type afterheat recovery fresh air handling unit |
| CN104776739A (en) * | 2014-01-13 | 2015-07-15 | 杭州三花研究院有限公司 | Heat pipe heat exchanger, evaporator component and heat pump clothes dryer |
| CN103982958A (en) * | 2014-05-04 | 2014-08-13 | 南京师范大学 | Two-stage precooling dehumidification device and method |
| CN106403116A (en) * | 2016-11-25 | 2017-02-15 | 中国科学院理化技术研究所 | Integrated natural cooling machine room air conditioner system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396740A (en) * | 2022-01-26 | 2022-04-26 | 四方科技集团股份有限公司 | Refrigerating system with dehumidification function |
| CN114396740B (en) * | 2022-01-26 | 2023-09-12 | 四方科技集团股份有限公司 | Refrigerating system with dehumidification function |
| CN115540373A (en) * | 2022-09-21 | 2022-12-30 | 广州特域机电有限公司 | Energy-saving industrial water chiller |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180216 |