CN111549856A - Self-driven planarization mist liquid drop directional collection structure - Google Patents
Self-driven planarization mist liquid drop directional collection structure Download PDFInfo
- Publication number
- CN111549856A CN111549856A CN202010255936.4A CN202010255936A CN111549856A CN 111549856 A CN111549856 A CN 111549856A CN 202010255936 A CN202010255936 A CN 202010255936A CN 111549856 A CN111549856 A CN 111549856A
- Authority
- CN
- China
- Prior art keywords
- mist
- collecting
- ridge
- self
- collection
- 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
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/28—Methods or installations for obtaining or collecting drinking water or tap water from humid air
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention belongs to the technical field of mist droplet collection, and discloses a self-driven planar mist droplet directional collection structure, which comprises at least one mist collection unit with a hydrophobic or super-hydrophobic surface; the mist collecting unit comprises a ridge part and mist collecting sheets which are arranged on the same plane, the plurality of mist collecting sheets are connected to the ridge part and extend outwards from the ridge part to two sides, each mist collecting sheet comprises at least one outer side tip, and the mist collecting sheets are uniformly transited from the inner side root part to the outer side tips; the fog collecting sheet is used for collecting liquid drops and enabling the liquid drops to be directionally conveyed to the ridge under the driving of Laplace pressure, and the ridge is used for enabling the liquid drops to directionally move along the length direction of the liquid drops under the driving of gravity. The invention adopts a planar structural form, utilizes asymmetric Laplace pressure and gravity drive to realize the directional mist collection process of spontaneous capture and spontaneous drive, thereby realizing the purposes of autonomously collecting mist and automatically directionally transporting the mist, and having simple structure, easy manufacture and low cost and being expected to be put into use on a large scale.
Description
Technical Field
The invention belongs to the technical field of mist droplet collection, and particularly relates to a functional structure for collecting and transporting tiny mist droplets.
Background
Fog collection is considered to be an effective scheme for solving the water drawing problem of people in poor and arid regions, and the adoption of a bionic technology for natural learning in an efficient fog collection implementation mode proves to be a relatively efficient path. The combination of hydrophobic/hydrophilic patterns elicited by desert beetles and the combination of surfaces and the array of pyramids proposed for learning to cactus represent two typical biologically inspired mist water collection modes. After the unique fog water collecting capability is demonstrated for the first time, the artificial fog collector inspired by cactus is widely reported on the basis of metal thorns, integrated structures and the like. In these systems, the directional transport of the deposited droplets is highly dependent on the differences in wettability and geometric gradients. The efficient water collection and spontaneous droplet transfer of these designs are of great value, but these mist collectors still suffer from problems such as durability, cumbersome manufacturing processes, and high cost.
Disclosure of Invention
The invention provides a self-driven planar mist liquid drop directional collection structure, which adopts a planar structural form, utilizes asymmetric Laplace pressure and gravity drive to realize a directional mist collection process of spontaneous capture and spontaneous drive, thereby realizing the purposes of autonomously collecting mist and automatically directionally conveying the mist, and has the advantages of simple structure, easy manufacture, low cost and hopeful large-scale application.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a self-propelled planarizing mist droplet orientation collection structure comprising at least one mist collection cell having a hydrophobic or superhydrophobic surface; the fog collecting unit comprises a ridge and fog collecting sheets which are arranged on the same plane, the fog collecting sheets are connected to the ridge and extend outwards from the ridge to two sides, each fog collecting sheet comprises at least one outer side tip, and the inner side root is uniformly transited to the outer side tip.
Further, the fog collecting piece is used for collecting liquid drops and enabling the liquid drops to be directionally conveyed to the ridge under the driving of Laplace pressure, and the ridge is used for enabling the liquid drops to directionally move along the length direction of the liquid drops under the driving of gravity.
Furthermore, the fog collecting unit is a hollow part except the ridge part and the fog collecting piece.
Further, the ridge forms an angle of not more than 30 ° with the vertical.
Further, the ridge is perpendicular to the ground.
Further, the distance between the ridges of two adjacent mist collecting units is 5-15 mm.
Furthermore, the maximum length of the fog collection sheet is 2-10mm, and the maximum width of the fog collection sheet is 1-5 mm.
Further, the mist collecting unit is made of one of paper, wax, iron, aluminum, copper and plastic.
Further, the hydrophobic or super-hydrophobic surface of the mist collecting unit is formed by a body of the mist collecting unit, or the body of the mist collecting unit is overlapped and covered with a super-hydrophobic material, or the body of the mist collecting unit is subjected to partial super-hydrophobic treatment in a processing mode.
Further, the overlaying and covering is one of pasting, coating, vapor deposition or laser etching, the processing mode is micromachining or laser processing, and the super-hydrophobic material is fumed silica, wax or fluorosilane.
The invention has the beneficial effects that:
the self-driven planarization mist liquid drop directional collection structure is based on pushing of asymmetric Laplace pressure and dragging effect of gravity, and simple, efficient and low-cost mist capturing and directional transporting forms are constructed; the mist is used as a liquid source, the asymmetric Laplace pressure applied to liquid drops on the mist collecting piece is used as a driving force to convey the liquid drops to the ridge in the middle in a spontaneous orientation mode, the liquid drops are collected on the ridge and rapidly roll down under the driving of gravity, and finally the liquid drops are completely collected. The directional mist liquid drop collecting structure is obtained through tests, the efficiency of the directional mist liquid drop collecting structure is 1.6 times that of a traditional harp-shaped mist water collector, the efficiency of the directional mist liquid drop collecting structure is 8.6 times that of a traditional pure plane mist water collector, and efficient mist water collection can be achieved. Meanwhile, the influence of parameters such as the distance between ridges, the structure and the area of the mist collecting piece on the mist collecting performance and the directional transport capacity of the captured liquid drops is researched, and the parameters are further optimized to obtain a better self-driven mist collecting and transport interface.
The self-driven planarization mist liquid drop directional collection structure has low manufacturing cost and has the potential of large-scale industrial application; the device has obvious effects on capturing and transporting the fog, can realize directional transport of liquid drops under the conditions of no external force and no external energy, realizes efficient, quick, safe and cheap fog collection, and provides a new feasible scheme for low-cost and large-scale fog collection and application.
Drawings
FIG. 1 is a schematic structural view of a planarized mist droplet orientation collection structure provided in example 1;
FIG. 2 is a schematic structural view of a planarized mist droplet orientation collection structure provided in example 2;
fig. 3 is a schematic structural diagram of a directional collection structure for the planarization mist droplets provided in example 3.
In the above fig. 1: 1-fog collecting unit; 2-mist collecting sheet; 3-a ridge; 4-accumulated droplets.
Detailed Description
The invention provides a self-driven planarization mist liquid drop directional collection structure, which can be used for capturing, directionally transporting and constructing a collection system containing tiny liquid drops in mist, and provides a new idea and application for the directions of low-cost and large-scale mist collection, fresh water acquisition, waste steam removal and recovery in industry and the like.
As shown in fig. 1 to 3, a self-driven planarization mist liquid drop directional collection structure comprises a mist collection unit 1 or a plurality of mist collection units 1 arranged in parallel, wherein the mist collection units 1 are provided with hydrophobic or super-hydrophobic surfaces. The hydrophobic or super-hydrophobic surface of the mist collecting unit can be formed by the body of the mist collecting unit 1, or formed by adhering, coating, vapor deposition or laser etching a super-hydrophobic material (such as fumed silica, wax or fluorosilane) on the body of the mist collecting unit 1, or formed by performing partial super-hydrophobic treatment on the body of the mist collecting unit 1 in a micro-machining or laser machining mode.
Each mist collecting unit 1 includes a ridge portion 3 and a plurality of mist collecting pieces 2 arranged on both sides of the ridge portion 3. The ridge 3 is a strip-shaped sheet body which can make the liquid drops directionally move along the length direction of the ridge under the driving of gravity, and the mist collecting sheet 2 is a triangular or branched triangular sheet body which can collect the liquid drops and make the liquid drops directionally conveyed to the ridge 3 under the driving of Laplace pressure. The ridge 3 and the mist collecting piece 2 in the mist collecting unit 1 are arranged on the same plane, and the ridge removing part 3 and the mist collecting piece 2 are hollow parts, so that the mist collecting unit 1 is planar, and the mist collecting unit is simple to manufacture and low in cost.
The distance between the ridges 3 of two adjacent mist collecting units 1 is 5-15mm, so that the mist collecting sheets 2 have sufficient space to capture tiny liquid drops in mist, and waste of a flow space of the collected mist is avoided. The included angle between the ridge 3 and the vertical line is not more than 30 degrees, and the ridge is preferably vertical to the ground, so that the liquid drops gathered by the ridge 3 can be effectively driven under the action of gravity. The plurality of mist collecting pieces 2 extend outwards from the ridge part 3 to two sides and are arranged at intervals or symmetrically and are preferably arranged at equal intervals. Each mist collecting blade 2 is connected to the ridge 3 at its inner root and comprises one or more outer tips, with a uniform transition from the inner root to all the outer tips. The shape of the mist collecting sheet 2 can be a single triangle or a complex multi-layer structure formed by combining a plurality of triangles, so that asymmetric Laplace pressure is generated to drive the accumulated liquid drops to the same direction for collection. Preferably, the maximum length of the mist collecting sheet 2 is selected within the range of 2-10mm, and the maximum width is selected within the range of 1-5mm, so that the size not only can ensure that the mist collecting sheet 2 has enough coverage to meet the mist collecting effect, but also can realize directional liquid drop transportation and ensure the mist collecting efficiency.
Therefore, the outer tip of the mist collecting sheet 2 captures tiny droplets in the mist, the Laplace pressure generated by the self structure on the captured droplets is used for driving the droplets to move towards the ridge 3, then the droplets gradually collide with other small droplets on the ridge 3 and move downwards under the dragging of gravity, and finally the droplets are dropped and collected, so that the capturing of the mist, the transportation and the collection of the droplets are realized, and the efficient and cheap mist water collection is completed.
When the mist collecting unit 1 is made of paper, filter paper or plastic, the surface of the mist collecting unit 1 can be coated with a layer of film by soaking and melting wax, polydimethylsiloxane, fumed silica and a hexanol solution of polydimethylsiloxane, so that the mist collecting unit 1 achieves the effect of hydrophobicity or super-hydrophobicity. When the mist collecting unit 1 is made of metal such as iron, aluminum, copper, etc., the surface of the mist collecting unit 1 can be made hydrophobic or super-hydrophobic by using an oxidation method in addition to the above-mentioned immersion method. Besides, the materials can be pasted, coated or deposited in a gas phase to make the surface of the mist collecting unit 1 hydrophobic or super-hydrophobic. When the mist collecting unit 1 is made of high-strength wax, no treatment is required due to the hydrophobic property itself.
The invention is described in further detail below by means of several specific examples. The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the invention in any way.
Example 1:
as shown in fig. 1, a self-driven planarization mist droplet directional collection structure comprises a plurality of mist collection units 1 arranged side by side, wherein the mist collection units 1 are provided with hydrophobic or super-hydrophobic surfaces. Each mist collecting unit 1 comprises a ridge part 3 and a plurality of mist collecting pieces 2 arranged on two sides of the ridge part 3, the ridge part 3 and the mist collecting pieces 2 are arranged on the same plane, and the ridge part 3 and the mist collecting pieces 2 are hollow parts. The ridge 3 is a linear long strip-shaped sheet body which is uniform up and down, and can ensure that the liquid drops directionally move along the length direction of the liquid drops under the driving of gravity. The fog collecting pieces 2 are triangular platy bodies which are alternately arranged on two sides of the ridge part 3, gradually widen from the outer tip to the inner root and uniformly transit, can collect liquid drops and enable the liquid drops to be directionally conveyed to the ridge part 3 under the driving of Laplace pressure.
The filter paper is cut into the shape of a plurality of mist collecting units 1 by means of laser cutting, then the filter paper is soaked in a wax solution at the temperature of about 150 ℃ for 1 minute, the filter paper is taken out and cooled, the filter paper is placed in the direction vertical to mist, tiny droplets in the mist collide with the mist collecting units 1 and then stall and are collected on the mist, finally, the tiny droplets move to the ridge 3 directionally by each mist collecting sheet 2, are gathered at the bottom of the mist collecting units 1 under the driving of gravity, and then drop and are collected.
Example 2
As shown in FIG. 2, a self-driven planarization mist liquid drop directional collection structure comprises a plurality of mist collection units 1 which are arranged side by side, each mist collection unit 1 comprises a ridge portion 3 and a plurality of mist collection sheets 2 which are arranged on two sides of the ridge portion 3, the ridge portion 3 is a linear long strip-shaped sheet body with a wide top and a narrow bottom, and the mist collection sheets 2 are double-layer triangular sheet bodies which are alternately arranged on two sides of the ridge portion 3.
The copper sheet is integrally processed and cast into a plurality of mist collecting units 1 by adopting a high-precision machine tool or high-power laser cutting machine processing mode, the copper sheet is polished and soaked in a mixed solution of sodium hydroxide with the concentration of 2.5mol/L and ammonium bisulfite with the concentration of 0.13mol/L for 24 hours, the copper sheet is taken out, surface alkaline solution is washed off, the copper sheet is placed in a vacuum container after being dried, the vacuum degree is 0.09Mpa, 0.5ml of fluorosilane is added, the copper sheet is taken out after being placed at normal temperature for 24 hours, the copper sheet is placed in a direction vertical to mist, tiny droplets in the mist collide with the mist collecting units 1 and are stalled and collected on the mist collecting units, and finally, the mist collecting sheets 2 are directionally moved to a ridge part 3 and are collected at the bottom of the mist collecting units 1 under the driving of gravity to drip and be collected.
Example 3
As shown in fig. 3, a self-driven planarization mist droplet directional collection structure comprises a plurality of mist collection units 1 arranged in parallel, each mist collection unit 1 comprises a ridge portion 3 and a plurality of mist collection sheets 2 arranged on two sides of the ridge portion 3, the ridge portion 3 is a curved long strip-shaped sheet body which is uniform from top to bottom, and the mist collection sheets 2 are three-layer triangular sheet bodies alternately arranged on two sides of the ridge portion 3.
After melting the high-strength wax block, pouring the melted high-strength wax block into a designed mould with a plurality of shapes of the mist collecting units 1, cooling and removing the mould to obtain an interface body consisting of the high-strength wax, placing the interface body in a direction vertical to mist, wherein tiny liquid drops in the mist stall and are collected on the mist collecting units 1 after colliding with the mist collecting units 1, and finally directionally moving the interface body to the ridge 3 by each mist collecting sheet 2, gathering the interface body at the bottom of the mist collecting units 1 under the driving of gravity, and dropping and collecting the interface body.
Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various modifications without departing from the spirit and scope of the present invention, which falls within the protection scope of the present invention.
Claims (10)
1. A self-propelled planarizing mist droplet orientation collection structure comprising at least one mist collection unit having a hydrophobic or superhydrophobic surface; the fog collecting unit comprises a ridge and fog collecting sheets which are arranged on the same plane, the fog collecting sheets are connected to the ridge and extend outwards from the ridge to two sides, each fog collecting sheet comprises at least one outer side tip, and the inner side root is uniformly transited to the outer side tip.
2. The self-propelled planarizing mist droplet orientation collecting structure as in claim 1, wherein said mist collecting sheet is adapted to collect droplets and to transport the droplets directionally driven by laplace pressure to said ridge, said ridge adapted to move the droplets directionally driven by gravity along their length.
3. The self-propelled planarizing mist droplet orientation collecting structure as in claim 1, wherein said mist collecting unit is hollowed out except said ridges and said mist collecting pieces.
4. A self-propelled planarizing mist droplet orientation collection structure as in claim 1 wherein said ridge makes an angle with the vertical of no more than 30 °.
5. A self-propelled planarizing mist droplet orientation collection structure in accordance with claim 4 wherein said ridges are perpendicular to the ground.
6. A self-propelled planarizing mist droplet orientation collecting structure as in claim 1 wherein said ridges of adjacent two of said mist collecting units are spaced apart by 5-15 mm.
7. A self-propelled planarizing mist droplet orientation collection structure as in claim 1 wherein said mist collection sheet has a maximum length of 2-10mm and a maximum width of 1-5 mm.
8. A self-propelled planarizing mist droplet orientation collection structure as in claim 1 wherein said mist collection unit is made of one of paper, wax, iron, aluminum, copper, plastic.
9. The self-driven planarization mist liquid drop directional collection structure as claimed in claim 1, wherein the hydrophobic or super-hydrophobic surface of the mist collection unit is formed by the body of the mist collection unit, or by overlaying super-hydrophobic material on the body of the mist collection unit, or by partially super-hydrophobic processing the body of the mist collection unit.
10. The self-propelled planarizing mist drop orientation collecting structure of claim 9, wherein the overlying covering is one of pasting, coating, vapor deposition, or laser etching, the processing is micro-machining or laser machining, and the superhydrophobic material is fumed silica, wax, or fluorosilane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010255936.4A CN111549856A (en) | 2020-04-02 | 2020-04-02 | Self-driven planarization mist liquid drop directional collection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010255936.4A CN111549856A (en) | 2020-04-02 | 2020-04-02 | Self-driven planarization mist liquid drop directional collection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111549856A true CN111549856A (en) | 2020-08-18 |
Family
ID=72002367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010255936.4A Pending CN111549856A (en) | 2020-04-02 | 2020-04-02 | Self-driven planarization mist liquid drop directional collection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111549856A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134959A (en) * | 2021-11-01 | 2022-03-04 | 丽水学院 | Structure and method for efficiently collecting water by utilizing carving process |
| CN114832559A (en) * | 2022-04-28 | 2022-08-02 | 西安交通大学 | Composite prick array oil mist collecting device and preparation method and collecting method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008032431A1 (en) * | 2008-07-10 | 2010-01-14 | Behr Gmbh & Co. Kg | Bionically inspired condenser for fuel cell system, has fluid channel provided with wall that includes projection, where projection has surface with hydrophilic surface materials at side of projection |
| CN105536281A (en) * | 2015-12-18 | 2016-05-04 | 曹可欣 | Air condensation apparatus used on freshwater collection device |
| CN205475439U (en) * | 2016-01-26 | 2016-08-17 | 华南理工大学 | Bionical fog water collector |
| CN206418543U (en) * | 2016-08-31 | 2017-08-18 | 华南理工大学 | A kind of efficient multistage taper copper wire for collecting fog |
| CN107906998A (en) * | 2017-10-27 | 2018-04-13 | 东南大学 | A kind of high-performance condensing heat-exchanging pipe based on biomimetic features |
| CN108816702A (en) * | 2018-06-28 | 2018-11-16 | 清华大学 | A kind of driving catchment surface and preparation method certainly with super thin-super hydrophilic structure |
| CN108823569A (en) * | 2018-07-03 | 2018-11-16 | 哈尔滨工业大学 | The preparation method on the special wellability surface of drop directed transport |
-
2020
- 2020-04-02 CN CN202010255936.4A patent/CN111549856A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008032431A1 (en) * | 2008-07-10 | 2010-01-14 | Behr Gmbh & Co. Kg | Bionically inspired condenser for fuel cell system, has fluid channel provided with wall that includes projection, where projection has surface with hydrophilic surface materials at side of projection |
| CN105536281A (en) * | 2015-12-18 | 2016-05-04 | 曹可欣 | Air condensation apparatus used on freshwater collection device |
| CN205475439U (en) * | 2016-01-26 | 2016-08-17 | 华南理工大学 | Bionical fog water collector |
| CN206418543U (en) * | 2016-08-31 | 2017-08-18 | 华南理工大学 | A kind of efficient multistage taper copper wire for collecting fog |
| CN107906998A (en) * | 2017-10-27 | 2018-04-13 | 东南大学 | A kind of high-performance condensing heat-exchanging pipe based on biomimetic features |
| CN108816702A (en) * | 2018-06-28 | 2018-11-16 | 清华大学 | A kind of driving catchment surface and preparation method certainly with super thin-super hydrophilic structure |
| CN108823569A (en) * | 2018-07-03 | 2018-11-16 | 哈尔滨工业大学 | The preparation method on the special wellability surface of drop directed transport |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134959A (en) * | 2021-11-01 | 2022-03-04 | 丽水学院 | Structure and method for efficiently collecting water by utilizing carving process |
| CN114832559A (en) * | 2022-04-28 | 2022-08-02 | 西安交通大学 | Composite prick array oil mist collecting device and preparation method and collecting method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108816702A (en) | A kind of driving catchment surface and preparation method certainly with super thin-super hydrophilic structure | |
| CN111549856A (en) | Self-driven planarization mist liquid drop directional collection structure | |
| CN110552397A (en) | Functional interface for capturing and directionally collecting mist droplets in self-driven manner | |
| CN106944165A (en) | Function interface and its method and application with the self-driven directed transport ability of liquid | |
| Yong et al. | Nature-inspired superwettability achieved by femtosecond lasers | |
| CN110408933A (en) | It is a kind of to cooperate with the surface catchmented and preparation method with patterning parent/hydrophobic region | |
| US20110137458A1 (en) | Cleaning robot system and method of controlling same | |
| CN110394320B (en) | Self-cleaning type solar photovoltaic panel | |
| Sotoudeh et al. | Natural and synthetic superhydrophobic surfaces: A review of the fundamentals, structures, and applications | |
| CN110772925B (en) | Condensing demister with non-uniform wettability blades and preparation method of blades | |
| Gao et al. | Review on condensation frosting and defrosting experiments for superhydrophobic surfaces | |
| CN111250869A (en) | Method for preparing aluminum sheet with super-hydrophilic/super-hydrophobic pattern and application | |
| CN108097553B (en) | Mixed steam condensation heat transfer enhanced surface, preparation method and application thereof | |
| CN110215942A (en) | Special infiltration surface drop directed transport method based on Gradient Effect | |
| CN112892623A (en) | Surface channel structure for droplet directional control and preparation method thereof | |
| CN112900546A (en) | Bionic self-driven water collection pattern capable of being applied to large-scale surface and preparation method thereof | |
| CN204220293U (en) | A kind of gathering-device of flue gas purification system | |
| CN115369949A (en) | Bionic high-efficiency continuous fog water collector | |
| CN108265783B (en) | Air moisture collecting device based on conical needle array and preparation method and application thereof | |
| CN204202953U (en) | A kind of fog collector | |
| CN114524479B (en) | Solar drive interface evaporator based on heat transfer strengthening | |
| CN205392052U (en) | Contain two -stage phase transition coalescence combined type deep purification system | |
| CN209011072U (en) | Multifunctional road administration device | |
| CN201161829Y (en) | Article collector | |
| CN203687541U (en) | High-efficiency heat conduction oil type roller drying device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200818 |