CN112412872B - Turbofan with bilobed wheel noise reduction structure - Google Patents
Turbofan with bilobed wheel noise reduction structure Download PDFInfo
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- CN112412872B CN112412872B CN202011421512.7A CN202011421512A CN112412872B CN 112412872 B CN112412872 B CN 112412872B CN 202011421512 A CN202011421512 A CN 202011421512A CN 112412872 B CN112412872 B CN 112412872B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0057—Pumps therefor
- A61M16/0066—Blowers or centrifugal pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/287—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps with adjusting means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Pulmonology (AREA)
- Emergency Medicine (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of breathing machine accessories, in particular to a turbofan with a double-impeller noise reduction structure. The side assembling frame with the built-in internal adjustable blades is fixedly connected to the arc-shaped surface of the outer side of the external rotary cylinder of the turbofan with the double-impeller noise reduction structure, and the wind direction of the centrifugal fan is adjusted by adjusting the angle of the internal adjustable blades, so that the application range of the centrifugal fan is wider; the detachable elastic extrusion limiting device arranged on the inner side of the external rotary cylinder is used for elastically extruding and limiting the internal adjustable blade, so that the disassembly and replacement of people are facilitated, and the later-stage use cost is reduced; the quantity and the separation clearance of convenient according to rotational speed automatically regulated blade to promote its linkage performance, the operation is very simple and convenient.
Description
Technical Field
The invention relates to the technical field of breathing machine accessories, in particular to a turbofan with a double-impeller noise reduction structure.
Background
In modern clinical medicine, a ventilator has been widely used in respiratory failure due to various reasons, anesthesia and breathing management during major surgery, respiratory support therapy and emergency resuscitation as an effective means for manually replacing the function of spontaneous ventilation, and has a very important position in the modern medical field. The breathing machine is a vital medical device which can prevent and treat respiratory failure, reduce complications and save and prolong the life of a patient.
The ventilator is divided into a Controlled Mechanical Ventilation (CMV) and an Auxiliary Mechanical Ventilation (AMV) according to the type of use, and is powered by an internal centrifugal fan, which mainly consists of a volute, an impeller and a motor. Centrifugal fans use high-speed rotation to generate centrifugal force, which is a virtual force and is an inertial embodiment that moves a rotating object away from its center of rotation. In newton mechanics, it has been used to describe two different concepts: an inertial force, a balance of centripetal forces, observed in a non-inertial reference frame.
Centrifugal force (centrifugal force) is a virtual force, which is a manifestation of inertia that moves a rotating object away from its center of rotation. In newton mechanics, it has been used to describe two different concepts: an inertial force, a balance of centripetal forces, observed in a non-inertial reference frame. Under Lagrangian mechanics, centrifugal force is sometimes used to describe a generalized force at some generalized coordinate.
In the general context, centrifugal force is not the true force present. Its effect is only that under a rotating reference frame (non-inertial reference frame), newton's law of motion can still be used. Under an inertial reference system, the centrifugal force is not generated, and under a non-inertial reference system (such as a rotating reference system), the inertial force is required, otherwise, the Newton's law of motion cannot be used.
The centrifuge is a machine for separating components from solid and liquid particles or a mixture of liquid and liquid by using centrifugal force. The centrifuge is mainly used for separating solid particles from liquid in suspension, or separating two liquids which have different densities and are insoluble with each other in emulsion (for example, cream is separated from milk); it can also be used to remove liquids from wet solids, such as by spin drying clothes in a washing machine; the special overspeed tubular separator can also separate gas mixtures with different densities; some settling centrifuges can also grade solid particles according to density or granularity by utilizing the characteristic that solid particles with different densities or granularities have different settling speeds in liquid.
Current centrifugal fan simple structure, the last blade of centrifugal fan is mostly integrative fixed knot structure, can't change its centrifugal blade's quantity, specification and angle as required, also can't change wind direction and amount of wind, makes its application scope very limit.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problem that exists among the above-mentioned background art, provide a modified turbo fan that has bilobed wheel noise reduction structure, solve the blade on the present centrifugal fan and mostly be integrative fixed knot structure, can't change its centrifugal blade's quantity, specification and angle as required, also can't change wind direction and amount of wind, make the problem that its application scope is very limited.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a turbofan with bilobed wheel noise reduction structure, includes that centrifugal fan main part and axial fixity install the epaxial outside rotatory section of thick bamboo in centrifugal fan main part upper end, outside rotatory section of thick bamboo outside arcwall face on fixedly connected with body structure side direction assembly frame, the inside activity of side direction assembly frame be equipped with inside adjustable blade, inside adjustable blade lee face on set up the side direction of built-in supplementary expansion blade and accomodate the groove, inside adjustable blade both sides interlude have outside bellied body structure horizontal assembly axle, the inboard arcwall face of outside rotatory section of thick bamboo be located horizontal assembly axle connecting end threaded connection and have detachable elastic extrusion stop device.
The auxiliary expanding blade is characterized in that lateral telescopic assembly grooves are symmetrically formed in two ends of the inner side surface of the auxiliary expanding blade, lateral fixed assembly grooves with built-in reset elastic connecting sheets are formed in the inner walls of two sides of each lateral accommodating groove, and the non-fixed connecting ends of the reset elastic connecting sheets are connected with the inner side surface of the auxiliary expanding blade in a sliding mode through being inserted into the lateral telescopic assembly grooves.
The adjustable blade assembly machine is characterized in that inner side assembly through holes communicated with the elastic extrusion limiting device are formed in the outer rotating cylinder and the side assembly frame, outer side assembly blind holes symmetrically arranged with the inner side assembly through holes are formed in the inner wall of the outer side of the side assembly frame, and the inner adjustable blade is inserted into the inner side assembly through holes, the outer side assembly blind holes and the side assembly frame through transverse assembly shafts on two sides and is movably connected with the inner side assembly through holes, the outer side assembly blind holes and the side assembly frame.
The two ends of the transverse assembling shafts on the two sides of the internal adjustable blade are fixedly connected with limit gears of an integrated structure in the axial direction, and limit tooth grooves matched with the limit gears are formed in the inner side surfaces of the inner side assembling through holes and the outer side assembling blind holes.
The elastic extrusion limiting device comprises an integral structure external thread assembling pipe fixedly connected to the inner side surface of the external rotating cylinder, an internal thread fixing cylinder fixed on the external thread assembling pipe in a threaded mode and an internal extrusion spring installed inside the external thread assembling pipe.
The reset elastic connecting piece is a T-shaped structure elastic piece, and a T-shaped structure sliding groove matched with the reset elastic connecting piece is formed in the lateral telescopic assembling groove.
The anti-skid device is characterized in that a lateral assembly ring of an integrated structure is arranged at the connecting end of the outer lateral surface of the external thread assembly pipe and the inner lateral surface of the external rotating cylinder, a rubber assembly ring is sleeved between the lateral assembly ring and the connecting surface of the internal thread fixing cylinder at the outer side of the external thread assembly pipe, and annular limiting tooth surfaces for improving the anti-skid performance are arranged between the connecting surfaces of the rubber assembly ring and the lateral assembly ring and between the rubber assembly ring and the connecting surface of the internal thread fixing cylinder.
The auxiliary expanding blade outer edge connecting surface and the side edge connecting surface in the lateral containing groove are inclined surfaces for improving the assembling guidance.
The invention has the beneficial effects that:
(1) the side assembling frame with the built-in adjustable blades is fixedly connected to the arc-shaped surface of the outer side of the outer rotating cylinder of the turbofan with the double-impeller noise reduction structure, and the wind direction of the centrifugal fan is adjusted by adjusting the angle of the internal adjustable blades, so that the application range of the centrifugal fan is wider;
(2) the detachable elastic extrusion limiting device arranged on the inner side of the external rotary cylinder is used for elastically extruding and limiting the internal adjustable blade, so that the disassembly and replacement of people are facilitated, and the later-stage use cost is reduced;
(3) the blade is assisted to be expanded through the elastic connection piece elastic connection that resets in the groove is accomodate to the side direction of blade lee side with adjustable inside, utilizes high-speed rotation to control supplementary expansion blade and accomodates inslot portion separation from the side direction to the quantity and the separation clearance of convenient according to rotational speed automatically regulated blade, thereby promote its linkage performance, the operation is very simple and convenient.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
FIG. 3 is an internal cross-sectional view of an internally adjustable blade according to the present invention.
Fig. 4 is a partial sectional view of the position of the resilient compression limiter assembly of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams each illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention.
FIG. 1, a turbofan with bilobed wheel noise reduction structure that fig. 2 and fig. 3 show, including centrifugal fan main part 1 and axial fixity install the epaxial outside rotary drum 2 of centrifugal fan main part 1 upper end pivot, fixedly connected with body structure side direction assembly frame 3 on the 2 outside arcwall faces of outside rotary drum, the inside activity of side direction assembly frame 3 is equipped with inside adjustable blade 4, set up built-in supplementary side direction of expanding blade 5 on the blade 4 leeward side of adjustable blade 6 of accomodating, inside adjustable blade 4 both sides interlude has outside bellied body structure horizontal assembly axle 7, the inboard arcwall face of outside rotary drum 2 is located horizontal assembly axle 7 connection end threaded connection has detachable elastic extrusion stop device 8.
Example (b): people only need to clamp the internal adjustable blade 4 to extrude inwards when adjusting the angle of the internal adjustable blade 4, and then separate the limiting gear 13 on the transverse assembly shaft 7 from the limiting tooth groove 14, so that the angle of the internal adjustable blade 4 can be adjusted very conveniently.
Further, in order to cooperate with elastic installation, lateral telescopic assembling grooves 9 are symmetrically formed in two ends of the inner side face of the auxiliary expanding blade 5, lateral fixed assembling grooves with built-in reset elastic connecting pieces 10 are formed in the inner walls of two sides of the lateral accommodating grooves 6, and the non-fixed connecting ends of the reset elastic connecting pieces 10 are connected with the inner side face of the auxiliary expanding blade 5 in a sliding mode through being inserted into the lateral telescopic assembling grooves 9.
Further, for convenient installation, the inside assembly through hole 11 that is linked together with the elastic extrusion stop device 8 is seted up to inside and the side direction assembly frame 3 of outside revolving drum 2, set up the outside assembly blind hole 12 that sets up with inboard assembly through hole 11 symmetry on the inside wall of side direction assembly frame 3 outside, inside adjustable blade 4 inserts inboard assembly through hole 11 and outside assembly blind hole 12 and the inside swing joint of side direction assembly frame 3 respectively through the horizontal assembly axle 7 of both sides, furthermore, for cooperation top is spacing, the equal axial fixedly connected with body structure limit gear 13 in horizontal assembly axle 7 both ends of inside adjustable blade 4 both sides, set up on inboard assembly through hole 11 and the 12 medial surfaces of outside assembly blind hole spacing tooth's socket 14 with limit gear 13 matched with.
Example (b): the inner bore diameters of the inner assembling through hole 11 and the outer assembling blind hole 12 are larger than the minimum inner diameter of the annular limiting tooth groove 14.
As shown in fig. 4, in order to cooperate with the loading and unloading and the internal elastic extrusion, the elastic extrusion limiting device 8 comprises an integral structure external thread assembling pipe 15 fixedly connected to the inner side surface of the external rotary cylinder 2, an internal thread fixing cylinder 16 screwed on the external thread assembling pipe 15 and an internal extrusion spring 17 installed inside the external thread assembling pipe 15, further, in order to cooperate with the sliding connection and prevent the falling, the reset elastic connecting piece 10 is a T-shaped structure elastic piece, and a T-shaped structure sliding groove matched with the reset elastic connecting piece 10 is arranged inside the lateral telescopic assembling groove 9.
Example (b): the outer side end of the internal thread fixing cylinder 16 can be further provided with a lateral limiting bolt for controlling the telescopic distance of the internal extrusion spring 17. Can also set up the side direction installing support of built-in detachable stopper in the flexible assembly groove of side direction 9 both sides, loading and unloading opening sets up in the inboard, only can be more and more tight like this under the effect of centrifugal force, can not loosen and take off, can control the flexible distance of elastic connection piece 10 that resets to adjust inside adjustable blade 4 and supplementary interval between the expansion blade 5.
Further, in order to improve the shock absorption performance and the anti-loosening performance, the outer side face of the external thread assembling pipe 15 and the inner side face connecting end of the external rotating cylinder 2 are provided with an integrated lateral assembling ring 18, a rubber assembling ring 19 is sleeved between the connecting face of the lateral assembling ring 18 and the connecting face of the internal thread fixing cylinder 16 on the outer side of the external thread assembling pipe 15, annular limiting tooth faces used for improving the anti-skidding performance are arranged between the connecting face of the rubber assembling ring and the connecting face of the lateral assembling ring 18 and between the connecting face of the rubber assembling ring and the connecting face of the internal thread fixing cylinder 16, and further, in order to improve the guiding performance of the assembly resetting, the outer side edge connecting face of the auxiliary expanding blade 5 and the inner side edge connecting face of the lateral accommodating groove 6 are inclined faces for improving the assembly guiding performance.
The turbine fan with the double-impeller noise reduction structure is fixedly connected with the lateral assembly frame 3 with the built-in adjustable blades 4 on the arc-shaped surface of the outer side of the outer rotary cylinder 2, and the wind direction of the centrifugal fan is adjusted by adjusting the angles of the adjustable blades 4, so that the application range of the turbine fan is wider; the detachable elastic extrusion limiting device 8 arranged on the inner side of the external rotary cylinder 2 is used for elastically extruding and limiting the internal adjustable blade 4, so that the disassembly and replacement of people are facilitated, and the later-stage use cost is reduced; the auxiliary blade 5 that extends through the elastic connection piece 10 elastic connection that resets in the groove 6 is accomodate to the side direction of 4 leeward sides of blade with adjustable inside, utilizes high-speed rotation to control auxiliary blade 5 that extends and accomodates 6 inside separations in the groove from the side direction to the quantity and the separation clearance of convenient according to rotational speed automatically regulated blade, thereby promote its linkage performance, the operation is very simple and convenient.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides a turbofan with bilobed wheel noise reduction structure, includes that centrifugal fan main part (1) and axial fixity install in centrifugal fan main part (1) upper end epaxial outside rotatory section of thick bamboo (2), characterized by: an integrated structure lateral assembly frame (3) is fixedly connected to the outer side arc surface of the outer rotating cylinder (2), an internal adjustable blade (4) is movably assembled inside the lateral assembly frame (3), a lateral accommodating groove (6) with a built-in auxiliary expanding blade (5) is formed in the leeward side of the internal adjustable blade (4), a transverse assembly shaft (7) with an outward protruding integrated structure is arranged in the middle section of the two sides of the internal adjustable blade (4), and a detachable elastic extrusion limiting device (8) is in threaded connection with the connecting end of the transverse assembly shaft (7) on the inner side arc surface of the outer rotating cylinder (2); an inner side assembling through hole (11) communicated with the elastic extrusion limiting device (8) is formed in the outer rotating cylinder (2) and the lateral assembling frame (3), an outer side assembling blind hole (12) symmetrically arranged with the inner side assembling through hole (11) is formed in the inner wall of the outer side of the lateral assembling frame (3), and the inner adjustable blade (4) is respectively inserted into the inner side assembling through hole (11), the outer side assembling blind hole (12) and the lateral assembling frame (3) through the transverse assembling shafts (7) on the two sides and is movably connected; the inner adjustable type blade assembly is characterized in that two ends of a transverse assembly shaft (7) on two sides of the inner adjustable type blade (4) are fixedly connected with limit gears (13) in an integral structure in an axial direction, and limit tooth grooves (14) matched with the limit gears (13) are formed in inner side surfaces of an inner side assembly through hole (11) and an outer side assembly blind hole (12).
2. The turbofan according to claim 1, wherein the noise reducing structure of the twin impeller is: supplementary blade (5) medial surface both ends of expanding seted up side direction flexible assembly groove (9), the side direction accomodate the side direction fixed assembly groove of seting up built-in elastic connection piece (10) that resets on groove (6) both sides inner wall, the elastic connection piece that resets (10) non-fixed link through inserting the inside and supplementary blade (5) medial surface sliding connection that expands of side direction flexible assembly groove (9).
3. The turbofan according to claim 1, wherein the noise reducing structure of the twin impeller is: the elastic extrusion limiting device (8) comprises an integral structure external thread assembly pipe (15) fixedly connected to the inner side surface of the external rotating cylinder (2), an internal thread fixing cylinder (16) fixed on the external thread assembly pipe (15) in a threaded mode, and an internal extrusion spring (17) installed inside the external thread assembly pipe (15).
4. The turbofan according to claim 2, wherein the noise reducing structure of the twin impeller is: the reset elastic connecting piece (10) is a T-shaped structure elastic piece, and a T-shaped structure sliding groove matched with the reset elastic connecting piece (10) is formed in the lateral telescopic assembling groove (9).
5. A turbofan with a twin impeller noise reduction structure as set forth in claim 3 wherein: the anti-skid device is characterized in that the end, connected with the inner side face of the external rotating cylinder (2), of the outer side face of the external thread assembling pipe (15) is provided with a lateral assembling ring (18) in an integrated structure, a rubber assembling ring (19) is sleeved between the connecting faces of the lateral assembling ring (18) and the internal thread fixing cylinder (16) on the outer side of the external thread assembling pipe (15), and annular limiting tooth faces used for improving anti-skid performance are arranged between the connecting faces of the rubber assembling ring and the lateral assembling ring (18) and between the connecting faces of the rubber assembling ring and the internal thread fixing cylinder (16).
6. The turbofan according to claim 1, wherein the noise reducing structure of the twin impeller is: the outer edge connecting surface of the auxiliary expanding blade (5) and the inner edge connecting surface of the lateral containing groove (6) are inclined surfaces for improving the assembling guidance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011421512.7A CN112412872B (en) | 2020-12-08 | 2020-12-08 | Turbofan with bilobed wheel noise reduction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011421512.7A CN112412872B (en) | 2020-12-08 | 2020-12-08 | Turbofan with bilobed wheel noise reduction structure |
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| Publication Number | Publication Date |
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| CN112412872A CN112412872A (en) | 2021-02-26 |
| CN112412872B true CN112412872B (en) | 2022-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011421512.7A Active CN112412872B (en) | 2020-12-08 | 2020-12-08 | Turbofan with bilobed wheel noise reduction structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004332698A (en) * | 2003-05-12 | 2004-11-25 | Nissan Motor Co Ltd | Fan device |
| CN206830519U (en) * | 2017-06-30 | 2018-01-02 | 宁波精惠通风设备有限公司 | A kind of leafy wheel construction |
| CN208858638U (en) * | 2018-01-30 | 2019-05-14 | 北京航天奥祥通风科技股份有限公司 | It is a kind of double along zigzag axial flow fan vane wheel |
| CN110985440A (en) * | 2019-11-20 | 2020-04-10 | 芜湖秒算电子科技有限公司 | Double-layer fan blade for gas-liquid separation |
-
2020
- 2020-12-08 CN CN202011421512.7A patent/CN112412872B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004332698A (en) * | 2003-05-12 | 2004-11-25 | Nissan Motor Co Ltd | Fan device |
| CN206830519U (en) * | 2017-06-30 | 2018-01-02 | 宁波精惠通风设备有限公司 | A kind of leafy wheel construction |
| CN208858638U (en) * | 2018-01-30 | 2019-05-14 | 北京航天奥祥通风科技股份有限公司 | It is a kind of double along zigzag axial flow fan vane wheel |
| CN110985440A (en) * | 2019-11-20 | 2020-04-10 | 芜湖秒算电子科技有限公司 | Double-layer fan blade for gas-liquid separation |
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|---|---|
| CN112412872A (en) | 2021-02-26 |
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Address after: 310052 Room 201, 2 / F, building 5, No. 1180, Bin'an Road, Changhe street, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Beifeng Technology Co., Ltd. Patentee after: Hangzhou Beifeng electromechanical Co.,Ltd. Address before: 310052 Room 201, 2 / F, building 5, No. 1180, Bin'an Road, Changhe street, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Beifeng Technology Co.,Ltd. Patentee before: Hangzhou Beifeng electromechanical Co.,Ltd. |
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