CN108043602A - A kind of adaptive turbulent flow nozzle - Google Patents
A kind of adaptive turbulent flow nozzle Download PDFInfo
- Publication number
- CN108043602A CN108043602A CN201810093350.5A CN201810093350A CN108043602A CN 108043602 A CN108043602 A CN 108043602A CN 201810093350 A CN201810093350 A CN 201810093350A CN 108043602 A CN108043602 A CN 108043602A
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- Prior art keywords
- flow
- nozzle
- spoiler
- adaptive
- nozzle body
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
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Abstract
The present invention provides a kind of adaptive turbulent flow nozzles, including nozzle body, spoiler and multiple Flexible elements, nozzle body is provided with air inlet end and outlet end, nozzle body is disposed with laminar flow chamber and flow-disturbing chamber along air inlet end to outlet end direction, the cross-sectional area of flow-disturbing chamber is gradually reduced along air inlet end to outlet end direction, spoiler is movably disposed in along the central axial direction parallel to nozzle in flow-disturbing chamber, and the spoiler is connected by each Flexible element and the inner wall with nozzle body.Using the adaptive turbulent flow nozzle of technical solution of the present invention, the nozzle disclosure satisfy that high-precision regulatory demand, and it can realize that nozzle automatically adjusts fluid flow rate, automatically the effect that lower nozzle different in flow rate generates turbulent flow is adapted to, the flow velocity of output gas flow can be automatically improved to greatest extent, of low cost, it is convenient more to stablize for the adjusting of fluid.
Description
Technical field
The present invention relates to fluid tip technical fields, and in particular to a kind of adaptive turbulent flow nozzle.
Background technology
There are two types of fluid tips relatively common at present, and a kind of is only the structure using variable cross-section, specifically, being that fluid is defeated
Entering end has wider cross section, and fluid is flowed out from relatively narrow cross section, is accelerated so as to fulfill fluid, and this layout architecture is simple,
Occupation rate of market is high.But during in face of high-end demand, for example, typical turbulent flow flow control, this simple variable cross-section spray
Head pattern cannot meet the needs of this is high-level.Another kind is the aperture valve of manual adjusting shower nozzle nozzle, when needs are with higher
When flow velocity ejects turbulent flow, it is only necessary to turn the aperture of aperture valve down, allow fluid flow the passage to become smaller and obtain high flow rate；Instead
It, when needing compared with diffusing body and compared with low flow velocity, then tunes up the aperture of aperture valve, such larger fluid by passage, make
Fluid velocity is slack-off.Obvious, it inevitably needs manually to participate in during the nozzle use of the latter, however in reality, by
In harmful effect of most site environment to the mankind, the application of this nozzle is constrained significantly.
In conclusion fluid tip degree of regulation of the prior art is not high enough, it is impossible to meet high-level regulatory demand,
Nozzle is adjusted by valve in addition, also having, but adjusts needs and manually participates in, adjusting control is inconvenient, and improves nozzle
Production cost.
The content of the invention
It is an object of the present invention to provide a kind of adaptive turbulent flow nozzle, which disclosure satisfy that high-precision regulatory demand,
And can realize that nozzle automatically adjusts fluid flow rate, of low cost, it is convenient more to stablize for the adjusting of fluid.
Based on this, the present invention proposes a kind of adaptive turbulent flow nozzle, single including nozzle body, spoiler and multiple elasticity
Member, the nozzle body are provided with air inlet end and outlet end, and the nozzle body is along the air inlet end to the outlet
End direction is disposed with laminar flow chamber and flow-disturbing chamber, and the cross-sectional area of the flow-disturbing chamber is along the air inlet end to institute
It states outlet end direction to be gradually reduced, the spoiler is movably disposed in along the central axial direction parallel to the nozzle
In the flow-disturbing chamber, and the spoiler is connected by each Flexible element with the inner wall of the nozzle body.
Preferably, the Flexible element includes piston cylinder, piston rod and extension spring, one end of the piston cylinder
It is connected with the inner wall of the nozzle body, the both ends of the extension spring are connected respectively with the piston cylinder and the piston rod
It connects, one end of the piston rod is connected with the spoiler.
Preferably, the piston rod is sheathed in the piston cylinder.
Preferably, the inner wall of the nozzle body is provided with to connect the first connecting portion of piston cylinder, described
The outer wall of spoiler is provided with to connect the second connecting portion of the piston rod.
Preferably, the first connecting portion is the first protrusion, and the second connecting portion is the second protrusion, described the
One it is raised be connected through the hinge with the piston cylinder, described second raised is connected through the hinge with the piston rod.
Preferably, the bottom of the piston cylinder is provided with pressure balance through hole.
Preferably, the spoiler is fusiformis block, and the outer wall of the fusiformis block is in streamlined and described
Symmetrical structure centered on fusiformis block.
Preferably, symmetrical structure centered on the nozzle body, and the central axis of the fusiformis block and institute
The central axis for stating nozzle body coincides.
Preferably, the quantity of the Flexible element is at least three, and each Flexible element surrounds the spray
The central axis of mouth body is circumferentially evenly distributed.
Preferably, the inner wall of the air inlet end is equipped with screw thread, and the outer wall of the air inlet end is provided with keyway.
Implement the embodiment of the present invention, have the advantages that：
1st, under the nozzle operation state, the indoor laminar gas of laminar flow chamber is passed through to flow-disturbing chamber, and spoiler is to layer
Gas body carries out flow-disturbing so as to destroy the laminar condition of gas, while gas drives spoiler along the central axis parallel to nozzle
Direction activity, since the cross-sectional area of flow-disturbing chamber is gradually reduced along air inlet end to outlet end direction, so that flow-disturbing
The flow channels that the supply stream formed between part and flow-disturbing chamber passes through are gradually reduced, so that when air-flow passes through flow channels
Flow velocity is speeded, under the collective effect accelerated by the flow-disturbing and air-flow of above-mentioned spoiler so that the gas of nozzle body outflow is rapids
Gas body；Spoiler is connected by multiple Flexible elements with nozzle body, so that spoiler can be along parallel to nozzle
Central axial direction vibrate back and forth, by spoiler automatically reset realize air-flow velocity automatic adjustment, it is of low cost, adjust
Facilitate stabilization.
2nd, Flexible element includes piston cylinder, piston rod and extension spring, one end of piston cylinder and the inner wall phase of nozzle body
Connection, the both ends of extension spring are connected respectively with piston cylinder and piston rod, and one end of piston rod is connected with spoiler.It is based on
Said structure, spoiler can be steadily along the central axial direction back and forth movements parallel to nozzle body, and air-flow passes through flow-disturbing
Extension spring is stretched during chamber, the pulling force of extension spring enables to spoiler to reset, while entire Flexible element is removable
Formula structure is unloaded, demolition and maintenance are convenient.
3rd, piston rod is sheathed in piston cylinder, and thus piston rod can be stably positioned in piston cylinder, without living
The phenomenon that stopper rod skids off ensures Flexible element stable operation.
4th, first connecting portion is the first protrusion, and second connecting portion is the second protrusion, and the first protrusion passes through hinge with piston cylinder
Connection, the second protrusion are connected through the hinge with piston rod, the first protrusion and the second raised structure cause entire Flexible element and
Connection between spoiler is more convenient, and the connection mode of hinge enables the first protrusion and the junction of piston cylinder to occur
It rotates, but also the second protrusion and the junction of piston rod can rotate, so that certain turn can occur for spoiler
It is dynamic, and then ensure spoiler stable operation.
5th, the bottom of piston cylinder is provided with pressure balance through hole, so that air can enter out of pressure balance through hole
In piston cylinder, the air in piston cylinder is supplemented, so as to ensure that piston rod can smoothly reset so that Flexible element works
It is smooth.
6th, spoiler is fusiformis block, and the outer wall of fusiformis block is the symmetrical structure centered on streamlined and fusiformis block,
Fusiformis block flow-disturbing effect is more preferable, and runs smooth after gas impact fusiformis block, and the outer wall of fusiformis block is in streamlined energy
Enough so that gas reduces the pressure loss when impacting so that gas energy loss after flow-disturbing chamber is few.
7th, the inner wall of air inlet end is equipped with screw thread, thus convenient for the connection of nozzle body and external air pump pipeline, inlet end
The outer wall in portion is provided with keyway, and the keyway of setting enables to the rotation of air inlet end more convenient, increases air inlet end outer wall
Frictional force.
Description of the drawings
Fig. 1 is the structure diagram of adaptive turbulent flow nozzle in the embodiment of the present invention.
Fig. 2 is the partial enlarged view at A in Fig. 1.
Fig. 3 is the attachment structure schematic diagram between Flexible element and spoiler in the embodiment of the present invention.
In figure：1- nozzle bodies, 2- spoilers, 3- Flexible elements, 4- air inlets end, 5- outlets end, 6- laminar flow chambers,
7- flow-disturbing chambers, the first protrusions of 8-, the second protrusions of 9-, 10- pressure balance through holes, 11- screw threads, 12- keyways；3a- piston cylinders,
3b- piston rods, 3c- extension springs.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment belongs to the scope of protection of the invention.
It should be appreciated that various information, but these information are described using term " first ", " second " etc. in the present invention
These terms are should not necessarily be limited by, these terms are only used for same type of information being distinguished from each other out.For example, the present invention is not being departed from
In the case of scope, " first " information can also be referred to as " second " information, similar, and " second " information can also be referred to as
" first " information.
As shown in Figure 1 to Figure 3：The present embodiment provides a kind of adaptive turbulent flow nozzle, including nozzle body 1,2 and of spoiler
Multiple Flexible elements 3, nozzle body 1 are provided with air inlet end 4 and outlet end 5, it should be pointed out that the spray in the present embodiment
In the operating condition, one end of air inlet end 4 is connected with air pump to mouth body 1, so that air-flow is passed through in nozzle body 1, spray
Mouth body 1 is disposed with laminar flow chamber 6 and flow-disturbing chamber 7, the horizontal stroke of flow-disturbing chamber 7 along air inlet end 4 to 5 direction of outlet end
Sectional area is gradually reduced along air inlet end 4 to 5 direction of outlet end, and spoiler 2 is along the central axis side parallel to the nozzle
To being movably disposed in the flow-disturbing chamber 7, and spoiler 2 by each Flexible element 3 and the inner wall phase with nozzle body 1
Connection, thus for air-flow when flowing through flow-disturbing chamber 7, gas stops realization flow-disturbing by spoiler 2, while air-flow drives spoiler 2
Along the central axial direction activity parallel to nozzle, at this point, since the cross-sectional area of flow-disturbing chamber 7 is along air inlet end 4 to outlet
5 direction of end is gradually reduced, and the flow channels that the supply stream formed between spoiler 2 and flow-disturbing chamber 7 passes through are gradually reduced, from
And cause the flow velocity increase of fluid；And the movable amplitude of spoiler 2 can voluntarily be adjusted according to the air velocity for being passed through flow-disturbing chamber 7
Section, when air-flow velocity is big, the movable amplitude bigger of spoiler 2, so that the cross-sectional area smaller of flow channels, and then make
The flow velocity for obtaining air-flow is further speeded up, in addition, spoiler 2 is connected by multiple Flexible elements 3 with nozzle body 1, so that
Spoiler 2 can be realized in flow rate process is adjusted and automatically reset, the automatic adjustment of realization spoiler 2.It is pointed out that
The laminar gas that general air pump generates destroys the laminar flow shape of gas under the flow-disturbing effect of the spoiler 2 in flow-disturbing chamber 7
State, while gas drives spoiler 2 along the central axial direction activity parallel to nozzle so that spoiler 2 and flow-disturbing chamber 7 it
Between the flow channels that pass through of the supply stream that is formed be gradually reduced so that flow velocity is speeded when air-flow passes through flow channels, and by
The Reynolds number formula that Na Wei-Stokes formula is released is it is recognised that Reynolds number is directly proportional to fluid flow rate, when flow velocity increases
During to certain critical value, laminar gas will become turbulent gases, the collective effect accelerated by the flow-disturbing and air-flow of above-mentioned spoiler 2
Under so that the gas that nozzle body 1 flows out is turbulent gases, and compared with the prior art, said structure is adjusted easy and is not required
Manually participate in, it is of low cost.And turbulent flow is a kind of highly complex three-dimensional unstable state, with the irregular flowing rotated, Turbulent Gas
Speed is transferred in the small whirlpool in many of body flow field, the transmission of momentum, heat and quality caused by this small whirlpool randomly generated
The necks such as rate several order of magnitude higher than laminar flow, spreads so as to which turbulent gases can be preferably applied for essence, and liquid atomization is broken up
Domain.
Based on above technical scheme, under the nozzle operation state, the laminar gas in laminar flow chamber 6 is passed through to flow-disturbing chamber
In room 7, spoiler 2 carries out flow-disturbing so as to destroy the laminar condition of gas to laminar gas, while gas drives spoiler 2 along flat
Row is in the central axial direction activity of nozzle, since the cross-sectional area of flow-disturbing chamber 7 is along air inlet end 4 to 5 direction of outlet end
It is gradually reduced, so that the flow channels that the supply stream formed between spoiler 2 and flow-disturbing chamber 7 passes through are gradually reduced, into
And so that flow velocity is speeded when air-flow passes through flow channels, under the collective effect accelerated by the flow-disturbing and air-flow of above-mentioned spoiler 2, make
It is turbulent gases to obtain the gas that nozzle body 1 flows out；Spoiler 2 is connected by multiple Flexible elements 3 with nozzle body 1, by
This enables spoiler 2 to be vibrated back and forth along the central axial direction parallel to nozzle, is automatically reset by spoiler 2 and realizes gas
Flow the automatic adjustment of flow velocity, of low cost, stabilization easy to adjust.
In the present embodiment, Flexible element 3 include piston cylinder 3a, piston rod 3b and extension spring 3c, the one of piston cylinder 3a
End is connected with the inner wall of nozzle body 1, and the both ends of extension spring 3c are connected respectively with piston cylinder 3a and piston rod 3b, piston
One end of bar 3b is connected with spoiler 2.Based on said structure, spoiler 2 can be steadily along parallel in nozzle body 1
Heart axis direction back and forth movement, by stretching extension spring 3c during flow-disturbing chamber 7, the pulling force of extension spring 3c can make air-flow
Spoiler 2 is obtained to reset, while entire Flexible element 3 is Demountable, demolition and maintenance are convenient.It is it is pointed out that elastic
Unit 3 can not be limited only to the structure in the present embodiment, can be by replacing the position of Flexible element 3 so that stretch bullet
Spring 3c is changed to the work requirements that compression spring also disclosure satisfy that Flexible element 3, and spring can also be that other are flexible
Structure, such as flexible rod etc..And the structure in the present embodiment enables to spoiler 2 to be stably connected with, and is a preferred scheme.
In order to enable piston rod 3b, steadily with piston cylinder 3a mutual cooperation activities, piston rod 3b is sheathed on piston cylinder 3a
Interior, thus piston rod 3b can be stably positioned in piston cylinder 3a, without the phenomenon that piston rod 3b is skidded off occurs, ensure elasticity
3 stable operation of unit.
In addition, the inner wall of nozzle body 1 is provided with to connect the first connecting portion of piston cylinder 3a, the outer wall of spoiler 2
It is provided with to connect the second connecting portion of piston rod 3b.Further, first connecting portion be the first protrusion 8, second connecting portion
For the second protrusion 9, the first protrusion 8 is connected through the hinge with piston cylinder 3a, and the second protrusion 9 is connected through the hinge with piston rod 3b,
The structure of first protrusion 8 and the second protrusion 9 so that the connection between entire Flexible element 3 and spoiler 2 is more convenient, and hinge
Connection mode the first protrusion 8 is rotated with the junction of piston cylinder 3a, but also second raised 9 and piston rod
The junction of 3b can rotate, so that certain rotation can occur for spoiler 2, and then ensure that spoiler 2 stablizes fortune
Row.
Wherein, the bottom of piston cylinder 3a is provided with pressure balance through hole 10, so that air can lead to from pressure balance
Enter in hole 10 in piston cylinder 3a, the air in piston cylinder 3a is supplemented, so as to ensure that piston rod 3b can smoothly reset,
So that Flexible element 3 work it is smooth.
Spoiler 2 in the present embodiment is fusiformis block, and the outer wall of fusiformis block is in being in streamlined and fusiformis block
Heart symmetrical structure, fusiformis block flow-disturbing effect is more preferable, and runs smooth after gas impact fusiformis block, and the outer wall of fusiformis block is
In streamlined gas is enabled to reduce the pressure loss when impacting so that gas energy loss after flow-disturbing chamber 7 is few, and is in
The fusiformis block of centrosymmetric structure can more stably be run.Further, symmetrical structure centered on nozzle body 1,
And the central axis of fusiformis block and the central axis of nozzle body 1 coincide, so that fusiformis block is along nozzle body 1
Central axis on move so that the operation of fusiformis block is more stablized, and fusiformis block is located at the central axial of nozzle body 1
On, fusiformis block being more uniformly stressed under gas shock, so that the operation of fusiformis block is more stablized.It may be noted that
It is that the 1 inner wall curved surface of nozzle body in the present embodiment is round and smooth, the tangent line of the arbitrary section line by 1 central axis of nozzle body
It can be led along central axial direction, thus, it is possible to reduce air-flow to pass through energy loss caused by during 1 inner wall of nozzle body.
Preferably, the quantity of Flexible element 3 is at least three, and each Flexible element 3 surrounds the central axis of nozzle body 1
It is circumferential evenly distributed, so that spoiler 2 can be steadily arranged in flow-disturbing chamber 7, the Flexible element 3 in the present embodiment
Quantity for three, in the case where meeting structural strength, production cost can be reduced using three Flexible elements 3, it should be pointed out that
Flexible element 3 can also select other quantity according to actual demand.
In addition, the inner wall of air inlet end 4 is equipped with screw thread 11, thus convenient for the connection of nozzle body 1 and external air pump pipeline,
The outer wall of air inlet end 4 is provided with keyway 12, and it is more convenient that the keyway 12 of setting enables to air inlet end 4 to rotate, increase into
The frictional force of 4 outer wall of gas end.
Using the adaptive turbulent flow nozzle of the embodiment of the present invention, under the nozzle operation state, the laminar flow in laminar flow chamber 6
Gas is passed through to flow-disturbing chamber 7, and spoiler 2 carries out flow-disturbing so as to destroy the laminar condition of gas, while gas to laminar gas
Body drives spoiler 2 along the central axial direction activity parallel to nozzle, since the cross-sectional area of flow-disturbing chamber 7 is along air inlet end
4 are gradually reduced to 5 direction of outlet end, so that the overcurrent that the supply stream formed between spoiler 2 and flow-disturbing chamber 7 passes through
Passage is gradually reduced, so that flow velocity is speeded when air-flow passes through flow channels, is accelerated by the flow-disturbing and air-flow of above-mentioned spoiler 2
Collective effect under so that nozzle body 1 flow out gas be turbulent gases；Spoiler 2 passes through multiple Flexible elements 3 and nozzle
Body 1 is connected, so that spoiler 2 can back and forth be vibrated along the central axial direction parallel to nozzle, passes through spoiler 2
It automatically resets and realizes the automatic adjustment of air-flow velocity, of low cost, stabilization easy to adjust.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these improve and replace
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of adaptive turbulent flow nozzle, it is characterised in that：Including nozzle body, spoiler and multiple Flexible elements, the spray
Mouth body is provided with air inlet end and outlet end, the nozzle body along the air inlet end to the outlet end direction according to
Secondary to be provided with laminar flow chamber and flow-disturbing chamber, the cross-sectional area of the flow-disturbing chamber is along the air inlet end to the outlet end
Direction is gradually reduced, and the spoiler is movably disposed in the flow-disturbing chamber along the central axial direction parallel to the nozzle
Interior, and the spoiler is connected by each Flexible element with the inner wall of the nozzle body.
2. adaptive turbulent flow nozzle according to claim 1, it is characterised in that：The Flexible element includes piston cylinder, work
Stopper rod and extension spring, one end of the piston cylinder are connected with the inner wall of the nozzle body, the both ends of the extension spring
It is connected respectively with the piston cylinder and the piston rod, one end of the piston rod is connected with the spoiler.
3. adaptive turbulent flow nozzle according to claim 2, it is characterised in that：The piston rod is sheathed on the piston cylinder
It is interior.
4. adaptive turbulent flow nozzle according to claim 2, it is characterised in that：The inner wall of the nozzle body sets useful
In the first connecting portion of connection piston cylinder, the outer wall of the spoiler is provided with to connect the second connection of the piston rod
Portion.
5. adaptive turbulent flow nozzle according to claim 4, it is characterised in that：The first connecting portion is the first protrusion,
The second connecting portion for second protrusion, described first it is raised be connected through the hinge with the piston cylinder, it is described second protrusion and
The piston rod is connected through the hinge.
6. adaptive turbulent flow nozzle according to claim 2, it is characterised in that：The bottom of the piston cylinder is provided with pressure
Balance through hole.
7. adaptive turbulent flow nozzle according to claim 1, it is characterised in that：The spoiler is fusiformis block, described
The outer wall of fusiformis block is the symmetrical structure centered on streamlined and the fusiformis block.
8. adaptive turbulent flow nozzle according to claim 7, it is characterised in that：Symmetrical junction centered on the nozzle body
Structure, and the central axis of the central axis and the nozzle body of the fusiformis block coincides.
9. according to the adaptive turbulent flow nozzle of claim 1 to 8 any one of them, it is characterised in that：The number of the Flexible element
Amount is at least three, and each Flexible element is circumferentially evenly distributed around the central axis of the nozzle body.
10. according to the adaptive turbulent flow nozzle of claim 1 to 8 any one of them, it is characterised in that：The air inlet end it is interior
Wall is equipped with screw thread, and the outer wall of the air inlet end is provided with keyway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093350.5A CN108043602B (en) | 2018-01-30 | 2018-01-30 | Self-adaptive turbulence nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093350.5A CN108043602B (en) | 2018-01-30 | 2018-01-30 | Self-adaptive turbulence nozzle |
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| Publication Number | Publication Date |
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| CN108043602A true CN108043602A (en) | 2018-05-18 |
| CN108043602B CN108043602B (en) | 2023-07-25 |
Family
ID=62124992
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|---|---|---|---|
| CN201810093350.5A Active CN108043602B (en) | 2018-01-30 | 2018-01-30 | Self-adaptive turbulence nozzle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112604863A (en) * | 2020-12-28 | 2021-04-06 | 广州媛爱贸易有限公司 | Automatic pressing-in equipment for nozzle of electro-hydraulic servo valve |
| CN113995345A (en) * | 2021-08-24 | 2022-02-01 | 帝舍智能科技(武汉)有限公司 | Impeller mechanism for mopping and sweeping integrated cleaning head and cleaning equipment |
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| CN113995345A (en) * | 2021-08-24 | 2022-02-01 | 帝舍智能科技(武汉)有限公司 | Impeller mechanism for mopping and sweeping integrated cleaning head and cleaning equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108043602B (en) | 2023-07-25 |
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