CN208793328U - Flow guide structure, axial flow fan and air conditioner - Google Patents
Flow guide structure, axial flow fan and air conditioner Download PDFInfo
- Publication number
- CN208793328U CN208793328U CN201821293676.4U CN201821293676U CN208793328U CN 208793328 U CN208793328 U CN 208793328U CN 201821293676 U CN201821293676 U CN 201821293676U CN 208793328 U CN208793328 U CN 208793328U
- Authority
- CN
- China
- Prior art keywords
- flow
- ontology
- guiding structure
- baffle liner
- vacuum chamber
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 17
- 238000004378 air conditioning Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000644 propagated effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000037237 body shape Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a water conservancy diversion structure, axial fan and air conditioner, which comprises a body, the body link up along the first direction and has seted up the water conservancy diversion chamber, the water conservancy diversion chamber is followed the both ends of first direction are formed with air intake and air outlet respectively, this internal seal is provided with the vacuum cavity, the vacuum cavity surround in the periphery in water conservancy diversion chamber, and with water conservancy diversion chamber mutually independent sets up. The utility model provides a water conservancy diversion structure, axial fan and air conditioner because motor and fan blade set up in the water conservancy diversion intracavity, then the vacuum cavity surrounds in motor and fan blade periphery, because sound can not propagate in the vacuum, then when the noise that motor and fan blade produced when through the vacuum cavity, because lack the conducting medium and can't propagate, then reached the purpose that reduces the axial fan noise.
Description
Technical field
The utility model relates to noise reduction technology fields, more particularly to a kind of flow-guiding structure, axial flow blower and air-conditioning.
Background technique
More common blower is mainly axial flow blower, cross flow fan and centrifugal blower in air-conditioning, wherein axial flow blower
It gains the name since gas is parallel to fan shaft flowing.
Axial flow blower generally comprises baffle liner, motor and fan blade, and fan blade is socketed on outside motor, and motor and fan blade formation
In the whole axial diversion cavity for being packed into baffle liner along baffle liner, the both ends of diversion cavity are respectively formed air inlet and air outlet, lead
Stream circle plays the role of increasing fan delivery and smooth out with the fingers along air-out direction.
But the problem that the generally existing noise of traditional axial flow blower is big, the biggish noise effect use of axial flow blower
Performance.
Utility model content
Based on this, it is necessary to which, for the problem that noise of axial flow fan is larger, noise of axial flow fan can be reduced by providing one kind
Flow-guiding structure, axial flow blower and air-conditioning.
A kind of flow-guiding structure, including ontology, the ontology offer diversion cavity, the diversion cavity edge along first direction perforation
The both ends of the first direction are respectively formed with air inlet and air outlet, and sealed set has vacuum chamber in the ontology, described true
Cavity is surrounded on the periphery of the diversion cavity, and is arranged independently of each other with the diversion cavity.
The ontology includes the multilayer baffle liner of inside and outside successively nesting, every layer of water conservancy diversion in one of the embodiments,
Circle, which is located at the one end of the both ends of the first direction respectively with adjacent baffle liner phase the same side, to be fixed, and the diversion cavity is formed
In in the baffle liner of innermost layer, the vacuum chamber is respectively formed between baffle liner described in every adjacent two layers.
The ontology includes inside and outside two layers nested of baffle liner, two layers of baffle liner position in one of the embodiments,
It is fixed to each other in the both ends of the first direction, to form the vacuum chamber of sealed set, the diversion cavity is formed in internal layer
The baffle liner in.
Every layer of baffle liner includes main body, the first outer and the second outer in one of the embodiments, and described first
Outer and second outer are connected to the both ends of the main body along the first direction, and first outer with it is described
Second outer is extended out compared to the main body.
In one of the embodiments, every layer of baffle liner along the both ends of the first direction by welding
The one end for being located at phase the same side with the adjacent baffle liner is fixed.
The aspirating hole for vacuumizing to the vacuum chamber, institute are offered on the ontology in one of the embodiments,
Stating flow-guiding structure further includes sealing element, and the sealing element seals the aspirating hole.
The aspirating hole for vacuumizing to the vacuum chamber, institute are offered on the ontology in one of the embodiments,
Stating flow-guiding structure further includes exhaust tube, and the exhaust tube is arranged in the aspirating hole and close between the inner wall of the aspirating hole
Envelope, the flow-guiding structure further includes sealing element, and the sealing element seals the exhaust tube.
The aspirating hole for vacuumizing to the vacuum chamber, institute are offered on the ontology in one of the embodiments,
Stating flow-guiding structure further includes exhaust tube, aspirating hole described in the pumping seal of tube, and the exhaust tube self seal.
A kind of axial flow blower, including flow-guiding structure as described in any one of the above embodiments, the axial flow blower further include motor, wind
Leaf and mesh enclosure, the fan blade are socketed on outside the motor, and the motor and the fan blade are accommodated along the first direction of the ontology
In in the diversion cavity, the mesh enclosure covers at one end that the ontology is provided with the air outlet, and the vacuum chamber is surrounded on
Outside the motor and the fan blade.
A kind of air-conditioning, including axial flow blower as described above.
Flow-guiding structure, axial flow blower and air-conditioning provided by the utility model, since motor and fan blade are set in diversion cavity,
Then vacuum chamber is surrounded on the periphery of motor and fan blade, since sound cannot be propagated in a vacuum, then generates when motor and fan blade
Noise can not be propagated when by vacuum chamber due to lacking transmitting medium, then achieved the purpose that reduce noise of axial flow fan.
Detailed description of the invention
Fig. 1 is the explosive view for the axial flow blower that an embodiment of the present invention provides；
Fig. 2 is the installation diagram of axial flow blower provided in Fig. 1；
Fig. 3 is the partial enlarged view in Fig. 2 at A.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes public affairs to the utility model
The understanding for opening content is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more related listed items.
Refering to fig. 1, an embodiment of the present invention provides a kind of air-conditioning, which includes axial flow blower 100, axial flow blower
100 include flow-guiding structure 10, motor 20, fan blade 30 and mesh enclosure 40, flow-guiding structure 10 be used for increase axial flow blower 100 air quantity and
It smoothes out with the fingers along air-out direction, fan blade 30 is socketed on outside the rotor of motor 20, and motor 20 and fan blade 30 are installed in flow-guiding structure 10, mesh enclosure
40 cover at flow-guiding structure 10, and motor 20 is fixedly connected with mesh enclosure 40, mesh enclosure 40 play fixed motor 20 and protection motor 20 with
The effect of fan blade 30.
Referring to Fig.2, flow-guiding structure 10 includes ontology 11, ontology 11 runs through along first direction offers diversion cavity 111, and leads
It flows chamber 111 and is respectively formed air inlet 112 and air outlet 113 along the both ends of first direction.Motor 20 and fan blade 30 are along first direction
It is set in diversion cavity 111, motor 20 drives fan blade 30 to rotate, and wind flows to fan blade 30 from air inlet 112, and flows to from fan blade 30
It is flowed out after air outlet 113.
Refering to Fig. 3, also sealed set has vacuum chamber 114 in ontology 11, and vacuum chamber 114 is in a second direction around ontology 11 1
Week setting, vacuum chamber 114 is surrounded on the periphery of diversion cavity 111, and vacuum chamber 114 and diversion cavity 111 are arranged independently of each other.Due to
Motor 20 and fan blade 30 are set in diversion cavity 111, then vacuum chamber 114 is surrounded on motor 20 and 30 periphery of fan blade, due to sound
It cannot propagate in a vacuum, then when motor 20 and the noise of the generation of fan blade 30 are when by vacuum chamber 114, due to lacking sound
Transmitting medium can not blaze abroad, then achieved the purpose that reduce by 100 noise of axial flow blower.
In one embodiment, ontology 11 is annular, and diversion cavity 111 is the center cavity of ring body 11, then above-mentioned
First direction is the axial direction of ontology 11, and above-mentioned second direction is the circumferential direction of ontology 11.It is understood that other one
In a little embodiments, ontology 11 is it is also an option that be set as hollow square body shape or hollow rectangular-shape, correspondingly, diversion cavity
111 be the center cavity of hollow square body shape ontology 11 or hollow rectangular-shape ontology 11.
In one embodiment, ontology 11 includes multilayer baffle liner 115, and multilayer baffle liner 115 is mutually nested, and multilayer is led
Stream circle 115 be interconnected and fixed along axial both ends (every layer of baffle liner 115 be located at axial both ends respectively with adjacent baffle liner
One end of 115 phase the same sides is fixed), diversion cavity 111 is opened on the baffle liner 115 of innermost layer along axial direction, per adjacent two
It is respectively formed vacuum chamber 114 between layer baffle liner 115, as multi-layer vacuum chamber 114 is provided in ontology 11, to completely cut off motor 20
With noise caused by fan blade 30 along the propagation radially of ontology 11, noise reduction effect is preferable.
In one embodiment, ontology 11 includes two layers of baffle liner 115, and specially the first baffle liner 115 is led with second
Stream circle 115, the first baffle liner 115 is located in the second baffle liner 115, and between the first baffle liner 115 and the second baffle liner 115
Vacuum chamber 114 is formed, so relatively convenient for setting.Specifically, mesh enclosure 40 is connected and fixed with the baffle liner 115 for being located inside.
Every layer of baffle liner 115 includes main body 1151, the first outer 1152 and the second outer 1153, the first outer 1152 and the
The axial both ends for being connected to main body 1151 in two outer 1153, and the first outer 1152 and the second outer 1153 compared to
Main body 1151 extends out, i.e., one end that the first outer 1152 is connect with the main body 1151 is formed by internal diameter to the first outer
1152 one end not connecting with main body 1151 are formed by internal diameter and are gradually increased, the second outer 1153 connect with main body 1151 one
End, which is formed by internal diameter and is formed by internal diameter to one end that the second outer 1153 connect with main body 1151, to be gradually increased, so increasing
Incoming air area and air-out area are added.
In one embodiment, the both ends of multilayer baffle liner 115 are by being welded and fixed.Specifically, multiple baffle liners 115
First outer 1152 is welded and fixed between each other, and the second outer 1153 of multiple baffle liners 115 is welded and fixed between each other.More
Specifically, it is fixed by the way of being fully welded between multiple first outers 1152, also uses and be fully welded between multiple second outers 1153
Mode fix, guarantee the leakproofness that vacuum chamber 114 is formed by between two layers of baffle liner 115.
In one embodiment, the aspirating hole 116 for vacuumizing to vacuum chamber 114 is offered on ontology 11, and is led
Flow structure 10 further includes sealing element (not shown), and sealing element seals aspirating hole 116.When ontology 11 has multiple vacuum chambers 114,
Correspondingly, the quantity of aspirating hole 116 be also vacuum chamber 114 quantity match it is multiple.It is so useful when being opened up on ontology 11
When the aspirating hole 116 vacuumized to vacuum chamber 114, it is inserted into aspirating hole 116 by external exhaust tube 12 by vacuum chamber 114
Vacuum pumping state, it is more convenient.
In one embodiment, flow-guiding structure 10 further includes exhaust tube 12, exhaust tube 12 be arranged in aspirating hole 116 and
It is sealed between the inner wall of aspirating hole 116, sealing element seal gas extraction duct 12.Such flow-guiding structure 10 itself includes exhaust tube 12,
It avoids and is vacuumized using external exhaust tube 12 to vacuum chamber 114, it is more convenient.
When aspirating hole 116 is multiple, correspondingly, exhaust tube 12 is also multiple to match with the quantity of aspirating hole 116,
Each exhaust tube 12 is arranged in each aspirating hole 16 and seals between the inner wall of aspirating hole 116.
Specifically, when ontology 11 has multi-layer vacuum chamber 114, aspirating hole 116 is opened in be formed in every layer of vacuum chamber 114
Adjacent two layers baffle liner 115 in be located on one layer of outside, and the aspirating hole 116 of every layer of vacuum chamber 114 misplaces between each other
Setting, when needing for exhaust tube 12 to be arranged in the aspirating hole 116 of the baffle liner 115 of internal layer, which needs
First pass through the baffle liner 115 positioned at outer layer.
Such as when baffle liner 115 has three layers, three layers of baffle liner 115 form two layers of vacuum chamber 114, at this time aspirating hole 116
It is two with exhaust tube 12, one of aspirating hole 116 is opened on outermost baffle liner 115, another pumping
Hole 116 is opened on the baffle liner 115 of middle layer, and one of exhaust tube 12, which is directly arranged in, is opened in outermost lead
It is sealed in aspirating hole 116 on stream circle 115 and with the inner wall of the aspirating hole 116, another exhaust tube 13, which is arranged in, to be opened in
When in the aspirating hole 116 on the baffle liner 115 of interbed, needs to first pass through positioned at outermost baffle liner 115, then be arranged in
It is opened in the aspirating hole 116 on the baffle liner 115 of middle layer Nei and is sealed with the inner wall of the aspirating hole 116.
In one embodiment, sealing element is formed in exhaust tube 12 itself, and exhaust tube 12 seals aspirating hole 116.Work as needs
When vacuumizing to vacuum chamber 114, exhaust tube 12 is arranged in aspirating hole 116, and welds exhaust tube 12 and ontology 11 by welding
Sealing is connect, after making vacuum chamber 114 be in vacuum state by exhaust tube 12, exhaust tube 12 can be cut short, then make to be evacuated
Pipe 12 and ontology 11 seal, and exhaust tube 12 be not stretched on ontology 11 at this time, but is formed as one with ontology 11, more beautiful
It sees.
It is understood that in other embodiments, sealing element can also exist independently of exhaust tube 12, as sealing element can
Think that sealant is formed, sealant seals exhaust tube 12 far from one end of ontology 11, to guarantee the sealing of vacuum chamber 114.
An embodiment of the present invention also provides a kind of above-mentioned flow-guiding structure 10 and axial flow blower 100.
Flow-guiding structure 10, axial flow blower 100 and air-conditioning provided by the embodiment of the utility model, fan blade 30 are socketed on motor 20
Rotor outside, motor 20 and fan blade 30 are set along in the diversion cavity 111 of flow-guiding structure 10, since vacuum chamber 114 is surrounded on
111 periphery of diversion cavity, then vacuum chamber 114 is surrounded on motor 20 and 30 periphery of fan blade at this time, since sound cannot pass in a vacuum
It broadcasts, then the noise and fan blade 30 that the rotation of motor 20 generates, which rotate the noise that agitation air is formed, to be propagated by vacuum chamber 114
It goes out, to achieve the purpose that reduce by 100 noise of axial flow blower.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of flow-guiding structure (10), which is characterized in that including ontology (11), the ontology (11) opens up along first direction perforation
Have diversion cavity (111), the diversion cavity (111) is respectively formed with air inlet (112) and outlet air along the both ends of the first direction
Mouth (113), the interior sealed set of the ontology (11) have vacuum chamber (114), and the vacuum chamber (114) is surrounded on the diversion cavity
(111) periphery, and be arranged independently of each other with the diversion cavity (111).
2. flow-guiding structure (10) according to claim 1, which is characterized in that the ontology (11) includes inside and outside successively nested
Multilayer baffle liner (115), every layer of baffle liner (115) be located at the both ends of the first direction respectively with the adjacent water conservancy diversion
One end of circle (115) phase the same side is fixed, and the diversion cavity (111) is formed in the baffle liner (115) of innermost layer, every phase
The vacuum chamber (114) are respectively formed between adjacent two layers of baffle liner (115).
3. flow-guiding structure (10) according to claim 1, which is characterized in that the ontology (11) includes the two of inside and outside nesting
Layer baffle liner (115), the both ends that two layers of baffle liner (115) is located at the first direction are fixed to each other, and are set with forming sealing
The vacuum chamber (114) set, the diversion cavity (111) are formed in the baffle liner (115) of internal layer.
4. flow-guiding structure (10) according to claim 2 or 3, which is characterized in that every layer of baffle liner (115) includes master
Body (1151), the first outer (1152) and the second outer (1153), first outer (1152) and second outer
(1153) be connected to the both ends of the main body (1151) along the first direction, and first outer (1152) with it is described
Second outer (1153) is extended out compared to the main body (1151).
5. flow-guiding structure (10) according to claim 2 or 3, which is characterized in that every layer of baffle liner (115) is along described
One end that the both ends of first direction are located at phase the same side with the adjacent baffle liner (115) by welding is fixed.
6. flow-guiding structure (10) according to claim 1, which is characterized in that offered on the ontology (11) for
The aspirating hole (116) that the vacuum chamber (114) vacuumizes, the flow-guiding structure (10) further includes sealing element, and the sealing element is close
Seal the aspirating hole (116).
7. flow-guiding structure (10) according to claim 1, which is characterized in that offer on the ontology (11) for institute
The aspirating hole (116) that vacuum chamber (114) vacuumizes is stated, the flow-guiding structure (10) further includes exhaust tube (12), the exhaust tube
(12) it is arranged in the aspirating hole (116) and is sealed between the inner wall of the aspirating hole (116), the flow-guiding structure (10)
It further include sealing element, the sealing element seals the exhaust tube (12).
8. flow-guiding structure (10) according to claim 1, which is characterized in that offer on the ontology (11) for institute
The aspirating hole (116) that vacuum chamber (114) vacuumizes is stated, the flow-guiding structure (10) further includes exhaust tube (12), the exhaust tube
(12) aspirating hole (116), and the exhaust tube (12) self seal are sealed.
9. a kind of axial flow blower (100), which is characterized in that including such as described in any item flow-guiding structures of claim 1-8 (10),
The axial flow blower (100) further includes motor (20), fan blade (30) and mesh enclosure (40), and the fan blade (30) is socketed on the motor
(20) outside, the motor (20) is placed in the diversion cavity along the first direction of the ontology (11) with the fan blade (30)
(111) in, the mesh enclosure (40) covers at one end that the ontology (11) is provided with the air outlet (113), the vacuum chamber
(114) motor (20) and the fan blade (30) are surrounded on outside.
10. a kind of air-conditioning, which is characterized in that including axial flow blower as claimed in claim 9 (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821293676.4U CN208793328U (en) | 2018-08-13 | 2018-08-13 | Flow guide structure, axial flow fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821293676.4U CN208793328U (en) | 2018-08-13 | 2018-08-13 | Flow guide structure, axial flow fan and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208793328U true CN208793328U (en) | 2019-04-26 |
Family
ID=66205298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821293676.4U Active CN208793328U (en) | 2018-08-13 | 2018-08-13 | Flow guide structure, axial flow fan and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208793328U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026849A (en) * | 2018-08-13 | 2018-12-18 | 珠海格力电器股份有限公司 | Flow guide structure, axial flow fan and air conditioner |
| CN110331556A (en) * | 2019-08-13 | 2019-10-15 | 珠海格力电器股份有限公司 | Outer barrel assembly and washing machine |
-
2018
- 2018-08-13 CN CN201821293676.4U patent/CN208793328U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026849A (en) * | 2018-08-13 | 2018-12-18 | 珠海格力电器股份有限公司 | Flow guide structure, axial flow fan and air conditioner |
| CN110331556A (en) * | 2019-08-13 | 2019-10-15 | 珠海格力电器股份有限公司 | Outer barrel assembly and washing machine |
| CN110331556B (en) * | 2019-08-13 | 2024-02-20 | 珠海格力电器股份有限公司 | Outer cylinder assembly and washing machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208793328U (en) | Flow guide structure, axial flow fan and air conditioner | |
| CN104236040B (en) | A rimq device, spiral case subassembly and air conditioner for spiral case | |
| MX2011008117A (en) | Broadband noise resonator. | |
| CN105378358B (en) | Bypass check valve and the Venturi with the bypass check valve | |
| CN109026849A (en) | Flow guide structure, axial flow fan and air conditioner | |
| CN207740102U (en) | Engine air intake system noise elimination structure and vehicle | |
| EP3290709A1 (en) | Compact pump and diaphragm assembly used therein | |
| RU2003135539A (en) | ROTARY COMPRESSOR UNIT AND HEAT EXCHANGER FOR INSTALLATION IN SUCH UNIT (OPTIONS) | |
| JP2019525124A (en) | Smoke exhaust assembly and smoke exhaust device | |
| CN208474029U (en) | Engine with supercharger intake noise reduction structure and air induction hose assembly | |
| CN103590999B (en) | A kind of inhaling silencer | |
| CN207125667U (en) | Cup lid component and wall-breaking machine | |
| CN207337906U (en) | Muffler | |
| KR100676919B1 (en) | Duplex electric fan | |
| CN108278221B (en) | Air inlet sealing structure and fan | |
| JP2019183717A (en) | Centrifugal blower | |
| CN102808793B (en) | Counter rotating axial flow fan | |
| CN210106635U (en) | Smoke exhaust valve and smoke exhaust system | |
| CN208311640U (en) | Valve for ventilation pipeline, special valve for range hood and range hood | |
| CN108916110B (en) | Impeller, fan and range hood | |
| CN109153377A (en) | Check-valves and Venturi with check-valves | |
| CN208237951U (en) | Range hood | |
| CN208237949U (en) | Range hood | |
| CN213542767U (en) | Air purifier with air circulation accelerating function | |
| CN109931291A (en) | A kind of rotary collector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |