CN103857259A - Backflow prevention device, heat dissipation device having backflow prevention device and electronic equipment having backflow prevention device - Google Patents
Backflow prevention device, heat dissipation device having backflow prevention device and electronic equipment having backflow prevention device Download PDFInfo
- Publication number
- CN103857259A CN103857259A CN201210499701.5A CN201210499701A CN103857259A CN 103857259 A CN103857259 A CN 103857259A CN 201210499701 A CN201210499701 A CN 201210499701A CN 103857259 A CN103857259 A CN 103857259A
- Authority
- CN
- China
- Prior art keywords
- blade
- fan
- flow preventer
- backflow prevention
- prevention device
- 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.)
- Granted
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention is applicable to the technical field of electronic equipment structure, and discloses a backflow prevention device, a heat dissipation device having the backflow prevention device and a piece of electronic equipment having the backflow prevention device. The backflow prevention device comprises a base and a backflow prevention blade group. The backflow prevention blade group includes a plurality of blades which can be oppositely folded and unfolded, the roots of the blades are rotatably connected to the base, and the blades are arranged annularly. Each blade is overlapped with an adjacent blade sequentially along the direction of annular arrangement of the blades. The heat dissipation device comprises a fan and the backflow prevention device. The electronic equipment comprises a case and a fan, and the backflow prevention device is arranged in the air outlet direction of the fan. According to the backflow prevention device, the heat dissipation device having the backflow prevention device and the electronic equipment having the backflow prevention device, the backflow prevention device has the advantages of small wind supply resistance, low noise and high reliability.
Description
Technical field
The invention belongs to electronic devices structure technical field, relate in particular to a kind of back-flow preventer and there is heat abstractor and the electronic equipment of this back-flow preventer.
Background technology
In electronic equipment, comprise various electronic devices and components, in the equipment course of work, these electronic devices can produce heat, cause device temperature to raise.In the time that device temperature exceedes certain value, will cause cause thermal damage or dysfunction.Therefore, must take the suitable type of cooling, the working temperature of device is controlled in OK range.
At present, modal cold and hot mode is air-cooled, is exactly provided with fan in equipment cabinets, drives the heating surface of air stream through device (or its radiator), by heat convection, device heating is passed to Bas Discharged cabinet.
In order to obtain larger cooling air delivery, conventionally need to adopt the heat radiation in parallel of multiple fans.This radiating mode faces the risk of single fan fails conventionally.Taking rack-mount server as example, in this kind equipment, conventionally adopt fan blowing heat radiation, each fan is substantially all to provide heat radiation to the device in its direct downstream, once there be single fan fails, the device in the direct downstream of inefficacy fan can not get enough cooling blasts, thereby meets with heat dissipation problem; More seriously, because the device region gas-flow resistance in fan downstream is larger, after fan fails stall, the air that adjacent fans is sent can select oppositely to pass through the less inefficacy fan of gas-flow resistance, thereby be adjacent and between fan, cause air flow shortcircuit at inefficacy fan, further cause the cooling air delivery in fan downstream components district to reduce, cause more large-area heat dissipation problem.
In prior art, be the double-deck fan replacing single-layer fan of employing for the conventional solution of single fan fails, the probability that two double-deck fans lost efficacy is simultaneously much smaller, but this scheme can make number of fans and power consumption all double, application cost is very high, power consumption is high, noise is large, and can not fundamentally stop the impact of single fan fails.
In addition, in prior art, also there are the flap type back-flow preventer of employing and film-type back-flow preventer.
It mainly there is following shortcoming in flap type back-flow preventer:
1, blade in the air-out area in fan, can block air channel after unlatching, increases the fan resistance of fan.
2, blade can be shaken, and air-flow causes regenerated noise through out-of-date meeting.
It mainly there is following shortcoming in film-type back-flow preventer:
1, film blade still in the air-out area in fan, can block air channel after unlatching, increases the fan resistance of fan.
2, in the time that wind speed is higher, film blade bears large wind effect, easily tears inefficacy.
3, fan is periodically rotation air-out, and film blade material is lighter, easily produces the noise of irregularities.
To sum up, back-flow preventer of the prior art, it mainly exists, and fan resistance is large, noise large, the shortcoming of poor reliability.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of back-flow preventer is provided and has had heat abstractor and the electronic equipment of this back-flow preventer, its back-flow preventer fan resistance is little, noise is little, reliability is high.
First aspect, the invention provides a kind of back-flow preventer, comprise base and anti-return vane group, described anti-return vane group comprises multiple blades that can draw in opposite directions and launch, the root of described blade is rotationally connected with described base, and each described blade circular array; Along the direction of described blade annular array, each described blade successively with the adjacent overlapping setting of blade.
In conjunction with first aspect, as the first mode in the cards, described blade has the first blade face and the second blade face, the first blade face of one of them blade is overlapped in the second blade face of the blade of a side adjacent with this blade, and the second blade face of this blade is overlapped in the first blade face with the blade of the adjacent opposite side of this blade.
In conjunction with first aspect, as the second mode in the cards, described back-flow preventer also comprises rotating connector, and described blade pass is crossed described rotating connector and is rotationally connected with described base.
In conjunction with the second mode in the cards, as the third mode in the cards, described rotating connector is hinge, described hinge comprises body and rotating shaft, described body is fixedly connected on described base, and described body is provided with multiple, and multiple described body annular array arrange, described rotation axis is connected in described body, and the root of described blade is connected in described rotation axis.
In conjunction with the third mode in the cards, as the 4th kind of mode in the cards, ringwise, it is fixedly connected on the body of each annular array in described rotating shaft.
In conjunction with the third mode in the cards, as the 5th kind of mode in the cards, the root of described blade is one-body molded sleeve part, and described sleeve part is sheathed in described rotating shaft.
In conjunction with arbitrary mode in the cards in first aspect and first to five kind, as the 6th kind of mode in the cards, the cross section of described blade is curved.
In conjunction with arbitrary mode in the cards in first aspect and first to five kind, as the 7th kind of mode in the cards, the other end along the root of described blade one end to described blade, the width of described blade increases progressively gradually.
In conjunction with arbitrary mode in the cards in first aspect and first to five kind, as the 8th kind of mode in the cards, on described hinge or on described base, be provided with the elastic component for making described mounted blade.
In conjunction with arbitrary mode in the cards in first aspect and first to five kind, as the 9th kind of mode in the cards, in the space that described back-flow preventer base blade group forms after drawing in, be provided with noise eliminator.
Second aspect, the invention provides a kind of heat abstractor, comprises fan, is provided with in first aspect and first to nine kind of mode in the cards back-flow preventer described in any on the air-out direction of described fan.
The third aspect, the invention provides a kind of electronic equipment, comprise cabinet, be arranged on electronic unit in described cabinet, for the fan of electronic unit heat radiation, on the air-out direction of described fan, be provided with in first aspect and first to nine kind of mode in the cards back-flow preventer described in any.
Back-flow preventer provided by the present invention and there is heat abstractor and the electronic equipment of this back-flow preventer, after blade in its back-flow preventer closes up, gather fan HUB district, not in the air-out area of fan, therefore can not block air channel, the fan resistance that can not increase fan, energy consumption is low; Also can avoid blade to shake the reproduced air-flow noise causing; In addition, Leave gathering HUB district can have certain guide functions, thereby promotes fan performance.And, the not fragile inefficacy of blade, structural reliability is high.
Brief description of the drawings
Fig. 1 is schematic perspective view when each blade draws in the back-flow preventer that provides of the embodiment of the present invention;
Fig. 2 is schematic perspective view when each mounted blade in the back-flow preventer that provides of the embodiment of the present invention;
Fig. 3 is schematic perspective view when each blade draws in the back-flow preventer that provides of the embodiment of the present invention;
Fig. 4 is schematic perspective view when each mounted blade in the back-flow preventer that provides of the embodiment of the present invention;
Fig. 5 is the fitting plane schematic diagram of a blade and a hinge in the back-flow preventer that provides of the embodiment of the present invention;
Fig. 6 is the assembling schematic perspective view of a blade and a hinge in the back-flow preventer that provides of the embodiment of the present invention;
Fig. 7 is the assembling schematic perspective view of base and hinge in the back-flow preventer that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As depicted in figs. 1 and 2, a kind of back-flow preventer that the embodiment of the present invention provides, comprises base 1 and anti-return vane group (in figure, not marking), and anti-return vane group comprises multiple blades 2 that can draw in opposite directions and launch, the root of blade 2 is rotationally connected with base 1, and each blade 2 circular array; Along the direction of blade 2 annular array, each blade 2 successively with the adjacent overlapping setting of blade 2.Be arranged symmetrically with by along the circumferential direction part is overlapping successively by multiple blades 2, promote wherein arbitrary blade 2 and all can drive other blades to form dominoes formula rollover effect, by gathering and the expansion of blade 2, air flow passage is formed to on-off action.
Back-flow preventer can be arranged on the air-out direction of fan.Fan can be aerofoil fan etc.In the present embodiment, the air-out direction of fan is defined as to front.Fan has HUB district, and so-called HUB district refers to the central area for mounted motor and control circuit, the i.e. hub area of fan centre on fan.In concrete application, base 1 can be arranged at fan HUB district.In the time of the normal air-out of fan, blade 2 is subject to forward wind-force, overturns and is brought together into front, HUB district to fan central shaft, does not disturb fan air-out, can also play guide functions, thereby promote corresponding fan performance.If certain fan fails, blade 2 is subject to reverse wind-force or under self gravitation effect, overturns and along fan radial development, be covered in fan outlet air surface, can effectively prevent that the air-out of adjacent fans from refluxing.Blade 2 can be in the air-out area of fan after unlatching, more can not block air channel, be beneficial to the fan resistance that reduces fan, and form 2 groups, the blade of interlock because each blade 2 parts are overlapping, adjacent blades 2 is mutually spacing, avoid blade 2 to shake in the time of fan work, thereby stopped regenerated noise.In addition, general plastic sheet or the sheet metal of adopting of blade 2 made, and it has certain intensity, is difficult for tearing damage, and reliability is high, and blade 2 material relative thin membrane material weights, can not produce the noise of irregularities.
Particularly, as depicted in figs. 1 and 2, each blade 2 all has the first blade face 201 and the second blade face 202.In the present embodiment, when each blade 2 is collapsed into ring-type in opposite directions, be defined as the first blade face 201 with blade 2 toward the one side of ring center, another side is the second blade face 202.The first blade face 201 1 side parts of one of them blade 2a are overlapped in the second blade face 202 with the blade 2b of the adjacent side of this blade 2a, and the second blade face 202 1 side parts of this blade 2a are overlapped in the first blade face 201 with the blade 2c of the adjacent opposite side of this blade 2a.Like this, each blade 2 has formed the arrangement architecture of dominoes formula, can be delivered to other blades 2 and drive the rotation of other blade generation same trend, thereby ensure that blade 2 can draw in completely and launch to the rotary action that wherein arbitrary blade 2 applies.
Particularly, as shown in Figure 3 and Figure 4, back-flow preventer also comprises rotating connector 3, and blade 2 is rotationally connected with base 1 by rotating connector 3.
Particularly, as shown in Fig. 1, Fig. 5 and Fig. 6, rotating connector 3 is hinge, and hinge comprises body 31 and rotating shaft 32, and body 31 is fixedly connected on base 1, body 31 and rotating shaft 32 are provided with multiple, as shown in Fig. 4 and Fig. 7, multiple body 31 annular array settings, rotation axis is connected in body 31, each blade 2 is corresponding to a rotating shaft 32, and each rotating shaft 32 is corresponding to a body 31.The root of blade 2 is connected in rotation axis.So that blade 2 can rotate relative to base 1 reliably.Certainly, understandably, rotating connector 3 can be also the parts such as rotating pin or hinge, or blade 2 also can directly be rotationally connected with on base 1.
As shown in Fig. 1, Fig. 5 and Fig. 6, on body 31, offer fixing hole 311, so that body 31 is lock onto on base 1 by locking member.Locking member can be screw or rivet etc.Certainly, also can body 31 be connected with base 1 by bonding welding or the suitable method such as one-body molded.
Or ringwise, it is fixedly connected on the body 31 of each annular array in rotating shaft 32.Like this, rotating shaft 32 can one-body moldedly be annular, is convenient to assembling.Certainly, rotating shaft 32 also can be curved, and be spliced into a circular rotating shaft 32 by two or many arc rotating shafts 32.
Particularly, as shown in Figure 5 and Figure 6, the root of blade 2 is one-body molded sleeve part 21, and sleeve part 21 is sheathed in rotating shaft 32.In concrete application, rotating shaft 32 can be fixed on body 31, and sleeve part 21 is movable is sheathed on rotating shaft 32.Or sleeve part 21 is fixedly placed on rotating shaft 32, rotating shaft 32 is rotationally connected with body 31.Or sleeve part 21 turning sets are located at rotating shaft 32, rotating shaft 32 is rotationally connected with body 31.Certainly, understandably, the root of blade 2 also can directly be rotationally connected with on body 31.
In the present embodiment, hinge is two-part structure, and one section is arranged on base 1, and one section of part as blade 2 is combined for two sections and formed being rotatably connected between blade 2 and base 1.
Particularly, as shown in Figure 5, the cross section of blade 2 is curved, in the rotation process drawing in and launch, can not produce conflict, interference with all blade 2 of enough guarantees and stuck, and after blade 2 launches, the mutual overlapping part of blade 2 can be blocked return air passage preferably, anti-return is effective.Certainly, understandably, blade 2 can also be set to other version.
Particularly, as shown in Figure 5 and Figure 6, the other end along the root of blade 2 one end to blade 2, the width of blade 2 increases progressively gradually, so that each blade 2 can draw in smoothly and launch.
In the present embodiment, blade 2 is the fan-shaped flake shape with certain radian, can rotate around the rotating shaft 32 being arranged on base 1 by its underpart hinge.By blade 2 being designed to there is certain radian, can ensure that blade 2 closes up and can not produce and conflict and stuck in expansion process in rotation, structural reliability is high.
Particularly, base 1 can be the suitable shape such as disc or patty, and its one side is used for connecting blade 2, and another side can be used for being connected with fan.In concrete application, the profile of base 1 can be rectangular, offers the perforate for flowing through for air-flow on it, and the central area of base 1 can be connected in fan HUB district, the region of the corresponding above-mentioned pore of flabellum of fan.
As shown in Figure 1, base 1 can comprise framework 11, and base 1 can connect as one by dowel (not shown) with framework 11, so that by base 1 integral installation fan.In concrete application, can also on framework 11, offer locking hole, to adopt the locking members such as screw through being fixed on fan in locking hole and by framework 11.Certainly, framework 11 can be also a part for fan.
Or, on hinge or on base 1, be provided with the elastic component (not shown) for blade 2 is launched.Elastic component can be spring or shell fragment etc., to ensure that fan fails rear blade 2 can launch smoothly.Fan is blowing each blade 2 when drawing in fan center region, need overcome the elastic force of elastic component.When fan fails rotate stop after, each blade 2 under the effect of elastic component, launches reset, to keep being laid on the exhaust passage of fan, shutoff the exhaust passage of fan, played the effect of anti-return, also can prevent that outside foreign material from entering exhaust passage.
Or, can on this back-flow preventer base 1, noise eliminator (not shown) be set, reduce to play the effect that fan goes out wind noise.In concrete application, in the space that can form, the porous sound-absorbing materials such as foam are set after base 1 blade 2 draws in.
The embodiment of the present invention also provides a kind of heat abstractor, comprises fan, is provided with above-mentioned back-flow preventer on the air-out direction of fan.Understandably, fan can be provided with one, two or more, and correspondingly, back-flow preventer also can be provided with one, two or more.
The embodiment of the present invention also provides a kind of electronic equipment, comprises cabinet, is arranged on the electronic unit in cabinet, the fan dispelling the heat for electronic unit, is provided with above-mentioned back-flow preventer on the air-out direction of fan.
The back-flow preventer that the embodiment of the present invention provides, gathers fan HUB district after its blade 2 closes up, and not in the air-out area of fan, therefore can not block air channel, can not increase the fan resistance of fan, and energy consumption is low; Also can avoid blade 2 to shake the reproduced air-flow noise causing; In addition, blade 2 is gathered in HUB district can have certain guide functions, thereby promotes fan performance.And, the not fragile inefficacy of blade 2, structural reliability is high.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace or improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. a back-flow preventer, is characterized in that, comprises base and anti-return vane group, and described anti-return vane group comprises multiple blades that can draw in opposite directions and launch, and the root of described blade is rotationally connected with described base, and each described blade circular array; Along the direction of described blade annular array, each described blade successively with the adjacent overlapping setting of blade.
2. back-flow preventer as claimed in claim 1, it is characterized in that, described blade has the first blade face and the second blade face, the first blade face of one of them blade is overlapped in the second blade face of the blade of a side adjacent with this blade, and the second blade face of this blade is overlapped in the first blade face with the blade of the adjacent opposite side of this blade.
3. back-flow preventer as claimed in claim 1, is characterized in that, described back-flow preventer also comprises rotating connector, and described blade pass is crossed described rotating connector and is rotationally connected with described base.
4. back-flow preventer as claimed in claim 3, it is characterized in that, described rotating connector is hinge, described hinge comprises body and rotating shaft, described body is fixedly connected on described base, and described body is provided with multiple, and multiple described body annular array arrange, described rotation axis is connected in described body, and the root of described blade is connected in described rotation axis.
5. back-flow preventer as claimed in claim 4, is characterized in that, ringwise, it is fixedly connected on the body of each annular array in described rotating shaft.
6. back-flow preventer as claimed in claim 4, is characterized in that, the root of described blade is one-body molded sleeve part, and described sleeve part is sheathed in described rotating shaft.
7. the back-flow preventer as described in any one in claim 1 to 6, is characterized in that, the cross section of described blade is curved.
8. the back-flow preventer as described in any one in claim 1 to 6, is characterized in that, along the extremely other end of described blade of root of described blade one end, the width of described blade increases progressively gradually.
9. the back-flow preventer as described in any one in claim 1 to 6, is characterized in that, is provided with the elastic component for making described mounted blade on described hinge or on described base.
10. the back-flow preventer as described in any one in claim 1 to 6, is characterized in that, in the space that described back-flow preventer base blade group forms after drawing in, is provided with noise eliminator.
11. 1 kinds of heat abstractors, comprise fan, it is characterized in that, are provided with the back-flow preventer as described in any one in claim 1 to 10 on the air-out direction of described fan.
12. 1 kinds of electronic equipments, comprise cabinet, are arranged on the electronic unit in described cabinet, the fan dispelling the heat for electronic unit, it is characterized in that, are provided with the back-flow preventer as described in any one in claim 1 to 10 on the air-out direction of described fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210499701.5A CN103857259B (en) | 2012-11-28 | 2012-11-28 | Backflow prevention device, heat dissipation device having backflow prevention device and electronic equipment having backflow prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210499701.5A CN103857259B (en) | 2012-11-28 | 2012-11-28 | Backflow prevention device, heat dissipation device having backflow prevention device and electronic equipment having backflow prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103857259A true CN103857259A (en) | 2014-06-11 |
| CN103857259B CN103857259B (en) | 2017-02-22 |
Family
ID=50864310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210499701.5A Active CN103857259B (en) | 2012-11-28 | 2012-11-28 | Backflow prevention device, heat dissipation device having backflow prevention device and electronic equipment having backflow prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103857259B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107822236A (en) * | 2017-11-23 | 2018-03-23 | 航宇救生装备有限公司 | A kind of neck support headgear available for isolated type protection clothes |
| TWI647997B (en) * | 2018-02-14 | 2019-01-11 | 緯創資通股份有限公司 | Backflow prevention device and server system using same |
| WO2024157782A1 (en) * | 2023-01-27 | 2024-08-02 | ニデックプレシジョン株式会社 | Backflow prevention device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1767182A (en) * | 2004-10-26 | 2006-05-03 | 台达电子工业股份有限公司 | Heat radiation assembly and its flow direction control structure |
| US7918651B2 (en) * | 2006-07-21 | 2011-04-05 | Delta Electronics, Inc. | Fan and impeller thereof |
| CN202348782U (en) * | 2011-09-30 | 2012-07-25 | 百度在线网络技术（北京）有限公司 | Anti-backflow radiating device |
-
2012
- 2012-11-28 CN CN201210499701.5A patent/CN103857259B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1767182A (en) * | 2004-10-26 | 2006-05-03 | 台达电子工业股份有限公司 | Heat radiation assembly and its flow direction control structure |
| US7918651B2 (en) * | 2006-07-21 | 2011-04-05 | Delta Electronics, Inc. | Fan and impeller thereof |
| CN202348782U (en) * | 2011-09-30 | 2012-07-25 | 百度在线网络技术（北京）有限公司 | Anti-backflow radiating device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107822236A (en) * | 2017-11-23 | 2018-03-23 | 航宇救生装备有限公司 | A kind of neck support headgear available for isolated type protection clothes |
| CN107822236B (en) * | 2017-11-23 | 2024-04-09 | 航宇救生装备有限公司 | Neck support headgear that can be used to isolated protective clothing |
| TWI647997B (en) * | 2018-02-14 | 2019-01-11 | 緯創資通股份有限公司 | Backflow prevention device and server system using same |
| WO2024157782A1 (en) * | 2023-01-27 | 2024-08-02 | ニデックプレシジョン株式会社 | Backflow prevention device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103857259B (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103294107A (en) | Electronic equipment and expansion apparatus thereof | |
| CN204178109U (en) | A kind of colour wheel heat abstractor, color wheel device and light-emitting device | |
| US20130056090A1 (en) | Fan assembly with backflow preventing structure | |
| US10052931B2 (en) | Outdoor cooling unit in vehicle air-conditioning apparatus | |
| TW201534821A (en) | Backflow prevention device and fan | |
| CN202004573U (en) | Radiating structure of motor device | |
| JP6245740B2 (en) | Gas turbine blade | |
| EP3388629A1 (en) | Turbine vane | |
| CN103857259A (en) | Backflow prevention device, heat dissipation device having backflow prevention device and electronic equipment having backflow prevention device | |
| WO2012011865A3 (en) | Air handling unit with bypass to the rotary heat exchanger | |
| KR20130008635A (en) | Fan blades and modifications | |
| CN102278325A (en) | Fan combination and electronic device using same | |
| CN107448415A (en) | A kind of electronic equipment and its radiator fan | |
| WO2016067409A1 (en) | Turbofan, and indoor unit for air conditioning device | |
| CN104100567B (en) | Radiator fan | |
| US20070091563A1 (en) | Active heat sink with multiple fans | |
| WO2006080709A3 (en) | Motor rotor | |
| WO2013062587A1 (en) | Fan impeller with multiple blades shaped and disposed to provide high air-power efficiency | |
| CN109477495A (en) | Propeller fan and fluid delivery system | |
| CN107347243A (en) | Radiating module | |
| CN101832279B (en) | Cooling fan | |
| CN202679887U (en) | Wind-pressure enhanced radiating module | |
| US9903206B2 (en) | Impeller | |
| CN103161769A (en) | Backflow resistant structure | |
| US20050025619A1 (en) | Outlet airflow direction control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |