CN1939580A - Static spiral mixer in tube - Google Patents
Static spiral mixer in tube Download PDFInfo
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- CN1939580A CN1939580A CNA2005100609576A CN200510060957A CN1939580A CN 1939580 A CN1939580 A CN 1939580A CN A2005100609576 A CNA2005100609576 A CN A2005100609576A CN 200510060957 A CN200510060957 A CN 200510060957A CN 1939580 A CN1939580 A CN 1939580A
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- helical element
- helical
- tube
- tangent
- spiral mixer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4313—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor comprising a plurality of stacked ducts having their axes parallel to the tube axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
- B01F25/43141—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles composed of consecutive sections of helical formed elements
Abstract
A static intrapipe spiral mixer is composed of a pipe for forming a fluid flowing space, and two or more spiral bodies arranged axially in said pipe. It features that there is a tangent or a near tangent relation between adjacent spiral bodies and between spiral body and the wall of pipe.
Description
(1) technical field
The present invention relates to applicable to mixing homogeneous, efficient heating, heat exchange, chemical reaction, rectification, the blender in fields such as GAS ABSORPTION, the homogenize silent oscillation blender of characteristic of the mixing that is particularly useful for realizing gas liquid.
(2) background technology
Problems such as reduce the production cost of static mixer, raising mixes stirs property, improves rectification, and the miniaturization fluid-mixing provides acylic motion and solve installing space excessive, and the pressure loss is excessive are present anxious industrial chain problems to be solved.Particularly in environmental project, the petroleum-based energy development field improves energy utilization rate, and the aspect such as reduce production costs.
According to investigation, existing general static mixer is mainly formed (clear and 61-38653, the noritakekann of Co., Ltd.) by the independent helical form part that is provided with in stream pipe and the stream pipe.This conveyor screw is spent helical angles by 180, the static mixer that the 180 degree helical elements that the parts of single-lead and helical angle are opposite laterally are formed by connecting by anchor clamps.But this spiral type mixer not can solve problems such as miniaturization, rotating flow.And, thereby increased the resistance of this blender because aforesaid two parts helical element does not form continuous stream interface.In order to carry out miniaturization, must achieve the goal by the quantity that increases parts, thereby increased installing space and increased manufacturing cost.And can't solve the existing problems of rotating flow.And because be made up of two kinds of conveyor screws, come off so can produce for the stream that has impingement flow, there is potential safety hazard in faults such as damage.
(3) summary of the invention
In order to overcome the deficiency that existing static mixer can not solve miniaturization, rotating flow, the invention provides a kind of static spiral mixer in tube with good homogeneous, miniaturization function.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of static spiral mixer in tube, comprise the pipeline, the helical element that are used to form fluid circulation space, described helical element axially is arranged in the pipeline, described helical element and pipeline closely cooperate, described blender comprises two or more helical elements, and each helical element size is equal to; Between the described adjacent helical element, tangent or approximate tangent between the tube wall of described helical element and pipeline; The helical angle of described helical element is 180 ° N a times, and N is a natural number.
Further, described adjacent helical element is fixedly connected to form helical bundle, and described helical bundle and pipe end closely cooperate.
Further again, described helical element end can mounting circular ring, the diameter of section coupling of described circle diameter and helical element; The annulus of adjacent helical element is fixedly connected in points of tangency.
The normal direction of the helicoid of described helical element is provided with aperture.
Described pipeline is a square pipe, and described helical element is n
2Individual, the natural number of n 〉=2 wherein; The described helical element layout that is square.
Or, described pipeline is a circular pipe, described helical element is that 1+3n (n+1) is individual, wherein n is a natural number, the axle center of a helical element is identical with the axle center of circular pipe, outer helical element and internal layer adjacent helical element are tangent or approximate tangent, with tangent or approximate tangent between the helical element adjacent in one deck.
In circular pipe, described helical element number can be seven, nineteen or 37.
In square pipe, described helical element number can be four, nine, 16.
Further again, described helical element is with normal helical element best results.
The helical angle of described helical element is 180 degree.
Described closely cooperating can be adopted fixedly connected mode.Tangent being meant: tangent or approximate tangent between the radial section circle of adjacent helical element, tangent or approximate tangent between the radial section circle of helical element and the pipeline.
Operation principle of the present invention is: with reference to Fig. 1, Fig. 2, Fig. 3, when fluid flows into above-mentioned helical element, get final product forming method to flow velocity and tangential flow velocity.Because it is tangent or approximate tangent between the adjacent helical element, the fluid that flows into adjacent helical element can produce the normal direction flow velocity and the tangential flow velocity of equidirectional equally, when both tangential flow velocitys of when being in contact with one another, can cancelling out each other, and the mutual building of adjacent fluid hits also can further play immixture, reaches the purpose of homogeneous and miniaturization.
(helix is a kind of space curve that is formed with certain angle rotation by the bus of straight cylinder to the ordinary helix body.The bottom surface diameter d of straight cylinder has following normal spiral equation .x=acost, y=ε asint, z=attan α (ε=± 1) with certain angle [alpha] in the orthogonal triaxial coordinate.Wherein z is the reference axis of straight cylinder, because of curvature and rate of oscillation on the each point on the normal spiral are certain, so the movement locus of its principal normal can form ordinary helicoid, when the tangent line of the each point on the space curve can form the ordinary helix body during by certain direction and angular movement.The bus of the right circular cylinder of ordinary helix body is to rotate by certain speed, the speed of helicoid normal direction and the anglec of rotation are certain, so when fluid is flowed through ordinary helicoid, just can form permanent speed in normal direction, this normal velocity can form the square rotational component vertical along the conduit axle center, the fluid of inflow is produced along moving that the axle center of circle rotates, realize the purpose of putting english incoming fluid.And adopt the continuous helical face promptly can reduce from causing this, the resistance that can reduce friction again, direct fluid generation rotating flow.
Can change the flow direction on the tangential direction of above-mentioned helicoid with the aperture of the normal direction that is machined in helicoid, thereby normal direction flow velocity and tangential flow velocity are formed to intersect, realize the cutting apart of convection cell, mixing, refinement, and can further reduce the resistance of convection cell.Inlay annulus at each helical element two ends, promptly can convection current go into that fluid is cut apart and rectified action, help the installation manufacturing of helical element again and the rectified action when flowing out.
Beneficial effect of the present invention mainly shows: 1, have good homogeneous, miniaturization function; 2, adopt the continuous helical face, can reduce manufacturing cost, reduce fluid resistance; 3, this static homogeneous blender is applicable to fields such as mixing, homogeneous, efficient heating, heat exchange, chemical reaction, rectification, GAS ABSORPTION:
(3.1), immixture: immixture is dilution, neutralization, dispersion, the extraction process of fluid.Physical mixed effect such as static mixer is cut apart because of having, conversion, upset thereby be widely used in numerous multithread bodies and mix occasion.Characteristics are that repeatability is good, good uniformity, nothing add gas and dope; Cause need not power, volume is little, the pressure loss is low, so have the saving energy, reduces cost, and saves advantages such as space, can design corresponding product according to user's requirement.
(3.2), homogeneous effect: can realize homogenizing of fluid.When utilizing pipeline to carry out the fluid conveying, meeting is formation temperature agglomerate, viscosity agglomerate because of the change of flow state of fluid, thereby influences the quality of product.The autonomous homogeneous that can utilize fluid behind this static mixer is installed in producing pipeline is used for realizing the average rate, samming of fluid, all viscosity, equal concentration, guarantee that the production pipeline does not have delay, guarantees the quality of production.；
(3.3), directly heating: can realize not having the heating of delay in the short time.This is a kind of vapours directly to be injected in the liquid, and the heat conduction by hot gas realizes the direct heating means to liquid.Since vapours can moment after by this blender by miniaturization, enrichment, so can shorten heat time heating time greatly, what reach mixing, homogeneous efficiently adds thermal effect.All applicable in chemical breakdown, organic heating, sterilization operation.
(3.4), heat exchange action: can improve heat exchanger effectiveness.Because the transformation and the miniaturization effect of blender have increased substantially heat exchanger effectiveness, this specific character is particularly remarkable to high viscosity fluid.Because this blender homogeneous effect, can optimize the cross section homogenieity of fluid, condense for the long-time delay of heat medium temperature and agglomerate and play the elimination effect.Can prevent the deterioration, rotten of product.Has reliable value in silica gel heating, food heating, cooling industry.
(3.5), chemical reaction effect: owing to the homogeneous and the miniaturization effect of this blender, promptly can increase the contact area of chemical reaction, can effectively utilize reaction heat again, realize continuity, the high efficiency of chemical reaction.Can be widely used in chemical industry and Lian Suo neutralization reaction.
(3.6), gas adsorption effect: effective absorption that can realize gas and liquid.Because the miniaturization effect of static mixer, micronize is melted gas greatly, and the contact area of gas and liquid is increased greatly, has improved dissolved efficiency.Can be widely used in industries such as gas fusion, the interpolation of beverage gas, GAS ABSORPTION.
(4) description of drawings
Fig. 1 is the ordinary helix schematic diagram.
Fig. 2 is ordinary helicoid figure.
Fig. 3 is the mobility status of adjacent normal helical element.
Fig. 4 is the detailed construction of normal helical element.
Fig. 5 is that single normal breechblock is installed in the structure chart in the pipeline.
Fig. 6 is the end face structure figure of the blender of seven helical elements.
Fig. 7 is the end face structure figure of the blender of nineteen helical element.
Fig. 8 is the end face structure figure of the blender of 37 helical elements.
Fig. 9 is three kinds of typical helical element configurations and the schematic diagram that concerns that disposes the angle.
Figure 10 is the configuration structure of helical bundle and pipeline.
Figure 11 is the axial, cross-sectional view of Figure 10.
Figure 12 is the end face structure figure of the blender of square pipe.
(5) specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 4, Fig. 5, Fig. 6, Figure 10, Figure 11, a kind of static spiral mixer in tube, comprise the pipeline 4, the helical element 1 that are used to form fluid circulation space, described helical element 1 axially is arranged in the pipeline 4, described helical element 1 is fixedlyed connected with pipeline 4, described blender comprises two or more helical elements 1, and each helical element size is equal to; Between the described adjacent helical element, tangent or approximate tangent between the tube wall of described helical element and pipeline; The helical angle of described helical element is 360 °.
Described pipeline 4 is a circular pipe, described helical element is 1+6, comprise 1-1,1-2,1-3,1-4,1-5,1-6,1-6, the axle center of a helical element 1-1 is identical with the axle center of circular pipe, outer 6 helical elements and internal layer adjacent helical element are tangent or approximate tangent, with tangent or approximate tangent between the helical element adjacent in one deck, the center of circle of outer six helical elements connects can form regular hexagon.The normal direction of the helicoid of described helical element is provided with aperture 5.Described adjacent helical element is fixedly connected to form helical bundle, and described helical bundle is fixedlyed connected with pipe end.Helical element end mounting circular ring 2, the diameter of section coupling of described annulus 2 diameters and helical element; The annulus of adjacent helical element is fixedly connected in points of tangency.Helical bundle and retainer ring 3 welding that are positioned at pipe end, described retainer ring 3 is provided with four screws and bolt 6, and described pipeline is provided with adpting flange, and described adpting flange is fixedlyed connected with retainer ring 3.
With reference to Fig. 9, the diameter computational methods of configuration caliber and combined helical monomer, wherein φ d is the diameter of said spiral monomer, and d1 is the radius of the helical bundle of aforementioned 7 helical elements combination, and this radius d1 becomes 30 degree angles with horizontal line, and corresponding calculating formula is:
d
1＝1.5d (1)。
The method of processing helical element: at first working width is d, the thin plate that length and thickness are certain, and the convex structure is processed at two ends holds the welding annulus under the arm with civilian dress, and process the aperture of institute's determined number on request, utilize special anchor clamps to be processed into normal helical element then, and the helical angle that guarantees helical element is 360 degree, at last annulus and normal helical element welded, and promptly finishes the processing to normal helical element.
The course of work of present embodiment is: when the gas-liquid multi-phase flow flows into above-mentioned helical bundle static mixer, at first will be cut apart by each annulus 2, and enter internal mixer again.Because each helical element is to make by identical direction of rotation, the fluid that event is cut apart by aforementioned each helical element just is increased the motion of normal direction, thereby fluid is produced along the rotating flow of each conveyor screw center rotation, and the aforementioned fluid-mixing that flows along helicoid has moving of normal direction, so when fluid flows through a plurality of apertures that each processing is processed on said spiral normal face, just can flow in the aforementioned aperture, fluid further be cut apart, refinement.
When fluid enters the said spiral monomer, because the hand of spiral is identical, the rotating flow direction that adjacent helical element produced is identical, when both tangential flow velocitys of when being in contact with one another, can cancelling out each other, and the mutual building of adjacent fluid hits also can further play immixture, the fluid of remaining axially-movable has only been realized the cutting apart of convection cell, mixing, refinement and rectified action.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Figure 10, Figure 11, the helical element 1 of present embodiment is normal helical element, and all the other structures are identical with embodiment 1.
(helix is a kind of space curve that is formed with certain angle rotation by the bus of straight cylinder to the ordinary helix body.The bottom surface diameter d of straight cylinder has following normal spiral equation .x=acost, y=ε asint, z=attan α (ε=± 1) with certain angle [alpha] in the orthogonal triaxial coordinate.Wherein z is the reference axis of straight cylinder, because of curvature and rate of oscillation on the each point on the normal spiral are certain, so the movement locus of its principal normal can form ordinary helicoid, when the tangent line of the each point on the space curve can form the ordinary helix body during by certain direction and angular movement.
The course of work of present embodiment is: the bus of the right circular cylinder of ordinary helix body is to rotate by certain speed, the speed of helicoid normal direction and the anglec of rotation are certain, so when fluid is flowed through ordinary helicoid, just can form permanent speed in normal direction, this normal velocity can form the square rotational component vertical along the conduit axle center, the fluid of inflow is produced along moving that the axle center of circle rotates, realize the purpose of putting english incoming fluid.And adopt the continuous helical face promptly can reduce from causing this, the resistance that can reduce friction again, direct fluid generation rotating flow.
All the other courses of work are identical with embodiment 1.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 7, Figure 10, Figure 11, the pipeline of present embodiment is a circular pipe, described helical element is 1+6+12, the axle center of a helical element is identical with the axle center of circular pipe, 6 helical elements in intermediate layer and internal layer adjacent helical element are tangent or approximate tangent, the helical element that outer 12 helical elements are adjacent with the intermediate layer is tangent or approximate tangent, with tangent or approximate tangent between the helical element adjacent in one deck, the center of circle of six helical elements in intermediate layer connects can form regular hexagon, and the center of circle of outer 12 helical elements connects can form dodecagon.All the other structures are identical with embodiment 2.
With reference to Fig. 9, the diameter computational methods of configuration caliber and combined helical monomer, wherein φ d is the diameter of said spiral monomer, and d2 is the radius of the helical bundle of aforementioned 19 helical elements combination, and this radius d2 becomes 15 degree angles with horizontal line, and corresponding calculating formula is:
All the other courses of work are identical with embodiment 2.
Present embodiment is relative 2, the better effects if of homogeneous, miniaturization, but cost increases to some extent.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 8, Figure 10, Figure 11, the pipeline of present embodiment is a circular pipe, described helical element is 1+6+12+18, the axle center of a helical element is identical with the axle center of circular pipe, 6 helical elements in intermediate layer and internal layer adjacent helical element are tangent or approximate tangent, the helical element that outer 12 helical elements are adjacent with the intermediate layer is tangent or approximate tangent, the helical element that 18 helical elements of outermost layer are adjacent with the intermediate layer is tangent or approximate tangent, with tangent or approximate tangent between the helical element adjacent in one deck, the center of circle of six helical elements in intermediate layer connects can form regular hexagon, the center of circle of outer 12 helical elements connects can form dodecagon, and the center of circle of 18 helical elements of outermost layer connects can form positive ten octagons.All the other structures are identical with embodiment 3.
With reference to Fig. 9, the diameter computational methods of configuration caliber and combined helical monomer, wherein φ d is the diameter of said spiral monomer, and d3 is the radius of the helical bundle of aforementioned 37 helical elements combination, and this radius d3 becomes 10 degree angles with horizontal line, and corresponding calculating formula is:
All the other courses of work are identical with embodiment 3.
Present embodiment is relative 3, the better effects if of homogeneous, miniaturization, but cost increases to some extent.
The pipeline of present embodiment is a square pipe, and described helical element is 4
2Individual, the described helical element layout that is square.Tangent or approximate tangent between the adjacent helical element.All the other structures of the course of work of present embodiment are identical with embodiment 3.
The diameter computational methods of configuration caliber and combined helical monomer, the cross-sectional length of square pipe is L, the radius d4 of helical element and the relational expression of duct length are:
d4＝L÷8 (4)。
All the other courses of work are identical with embodiment 3.
Claims (10)
1, a kind of static spiral mixer in tube comprises the pipeline, the helical element that are used to form fluid circulation space, and described helical element axially is arranged in the pipeline, and described helical element and pipeline closely cooperate, and it is characterized in that:
Described blender comprises two or more helical elements, and each helical element size is equal to;
Tangent or approximate tangent between the tube wall of tangent or approximate tangent, described pipeline and the contiguous helical element between the described adjacent helical element;
The helical angle of described helical element is 180 ° N a times, and N is a natural number.
2, static spiral mixer in tube as claimed in claim 1 is characterized in that: described adjacent helical element is fixedly connected to form helical bundle, and described helical bundle and pipeline closely cooperate.
3, static spiral mixer in tube as claimed in claim 1 or 2 is characterized in that: described helical element end mounting circular ring, the diameter of section coupling of described circle diameter and helical element; The annulus of adjacent helical element is fixedly connected in points of tangency.
4, static spiral mixer in tube as claimed in claim 3 is characterized in that: the normal direction of the helicoid of described helical element is provided with aperture.
5, static spiral mixer in tube as claimed in claim 4 is characterized in that: described pipeline is a square pipe, and described helical element is n
2Individual, the natural number of n 〉=2 wherein;
The described helical element layout that is square.
6, static spiral mixer in tube as claimed in claim 4, it is characterized in that: described pipeline is a circular pipe, described helical element is that 1+3n (n+1) is individual, wherein n is a natural number, the axle center of a helical element is identical with the axle center of circular pipe, outer helical element and internal layer adjacent helical element are tangent or approximate tangent, with tangent or approximate tangent between the helical element adjacent in one deck.
7, static spiral mixer in tube as claimed in claim 5 is characterized in that: the number of described helical element can be for one of following: four, nine, 16.
8, static spiral mixer in tube as claimed in claim 6 is characterized in that: the number of described helical element can be for one of following: seven, nineteen, 37.
9, static spiral mixer in tube as claimed in claim 4 is characterized in that: described helical element can be normal helical element.
10, static spiral mixer in tube as claimed in claim 9 is characterized in that: the helical angle of described helical element is 180 degree.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100609576A CN1939580A (en) | 2005-09-29 | 2005-09-29 | Static spiral mixer in tube |
| PCT/CN2006/002573 WO2007036159A1 (en) | 2005-09-29 | 2006-09-29 | A static tubular internal helical mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100609576A CN1939580A (en) | 2005-09-29 | 2005-09-29 | Static spiral mixer in tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1939580A true CN1939580A (en) | 2007-04-04 |
Family
ID=37899381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100609576A Pending CN1939580A (en) | 2005-09-29 | 2005-09-29 | Static spiral mixer in tube |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1939580A (en) |
| WO (1) | WO2007036159A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101952018A (en) * | 2008-02-21 | 2011-01-19 | 蓝星环境股份有限公司 | Device for improved delivery of gas to fluid |
| CN103240015A (en) * | 2013-04-19 | 2013-08-14 | 浙江理工大学 | Twisted hole piece type oil-gas-water three-phase flow static mixer |
| CN103962022A (en) * | 2014-04-16 | 2014-08-06 | 中国北方发动机研究所(天津) | Fluid mixing device with low pressure loss |
| CN112647565A (en) * | 2019-10-10 | 2021-04-13 | 广东尚高科技有限公司 | Intelligent constant temperature gondola water faucet that control was just used |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1400050B1 (en) * | 2010-05-24 | 2013-05-17 | Mereu | SPRAYER WITH AIR ACCUMULATION IN PRESSURE. |
| RO129972B1 (en) * | 2014-08-29 | 2017-09-29 | Viorel Micula | Modular system of swirling entrainment and controlled orientability of hot air streams |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2150916Y (en) * | 1992-09-26 | 1993-12-29 | 大连金州混合器厂 | Stationary mixer |
| DE4338795C1 (en) * | 1993-11-12 | 1995-06-14 | S Rockstedt Gmbh Maschf | Multi-shaft continuously operating mixing machine for plasticizable masses |
-
2005
- 2005-09-29 CN CNA2005100609576A patent/CN1939580A/en active Pending
-
2006
- 2006-09-29 WO PCT/CN2006/002573 patent/WO2007036159A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101952018A (en) * | 2008-02-21 | 2011-01-19 | 蓝星环境股份有限公司 | Device for improved delivery of gas to fluid |
| CN101952018B (en) * | 2008-02-21 | 2013-07-31 | 蓝星环境股份有限公司 | Device for improved delivery of gas to fluid |
| CN103240015A (en) * | 2013-04-19 | 2013-08-14 | 浙江理工大学 | Twisted hole piece type oil-gas-water three-phase flow static mixer |
| CN103962022A (en) * | 2014-04-16 | 2014-08-06 | 中国北方发动机研究所(天津) | Fluid mixing device with low pressure loss |
| CN112647565A (en) * | 2019-10-10 | 2021-04-13 | 广东尚高科技有限公司 | Intelligent constant temperature gondola water faucet that control was just used |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007036159A1 (en) | 2007-04-05 |
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