CN112032110A - Axial fan's wind-guiding circle and axial fan - Google Patents
Axial fan's wind-guiding circle and axial fan Download PDFInfo
- Publication number
- CN112032110A CN112032110A CN202011025721.XA CN202011025721A CN112032110A CN 112032110 A CN112032110 A CN 112032110A CN 202011025721 A CN202011025721 A CN 202011025721A CN 112032110 A CN112032110 A CN 112032110A
- Authority
- CN
- China
- Prior art keywords
- diffuser
- wind
- guide
- flow fan
- axial flow
- 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.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 31
- 230000002829 reductive effect Effects 0.000 abstract description 20
- 230000003068 static effect Effects 0.000 abstract description 7
- 230000003116 impacting effect Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of fans, and discloses an air guide ring of an axial flow fan and the axial flow fan, which comprise an air guide cylinder; one end of the air duct extends outwards to form a diffuser; the guide vanes are uniformly distributed in the air guide cylinder along the circumferential direction, and one end of each guide vane is fixed on the inner wall of the air guide cylinder; the protection network includes a plurality of concatenation rings along the radial distribution of guide duct, and every concatenation ring includes a plurality of circular arc sections, and every circular arc section all connects between two adjacent stator, and the circular arc section is the slope in the wind-guiding circle axial and arranges. The protection network of the integrated circular arc section of stator, the circular arc section is the slope distribution in wind-guiding circle axial direction, and radial a plurality of circular arc sections are the ladder distribution, and the time that the impeller wake strikes the protection network front end can stagger, can reduce axial fan's noise. One end of the guide vane is fixed in the air duct, and is not connected with the diffuser of the air guide ring, so that the shape of the diffuser is not damaged, the diffuser can recover kinetic energy and reduce flow velocity, static pressure and efficiency are increased, and noise generated when the wake of the impeller impacts the guide vane and a protective screen is reduced.
Description
Technical Field
The invention relates to the technical field of fans, in particular to an air guide ring of an axial flow fan and the axial flow fan.
Background
In order to avoid collision between the impeller and foreign matters, the axial flow fan is provided with a metal protective net at the air outlet of the air guide ring, extra installation time is needed when the metal protective net is installed, an extra mold is needed to manufacture the metal protective net, and the manufacturing cost of the axial flow fan is improved. In order to solve the above problems, a circular integrated protective net is generally integrated on a guide vane of an axial flow fan at present, but due to the limitation of a demolding technology, the axial thickness of the integrated protective net is generally consistent with the axial thickness of the guide vane, so that the distance between an impeller and the protective net is too short, airflow impacts on the integrated protective net, and great noise is generated.
In addition, in order to increase the efficiency of the axial flow fan, the air volume and the air pressure and reduce the noise generated by the airflow impacting the guide vane and the protective net, a diffuser is often arranged at the air outlet of the air guide ring, and in order to reduce the axial size of the axial flow fan, the guide vane is usually arranged on the diffuser.
Disclosure of Invention
The invention aims to provide an air guide ring of an axial flow fan and the axial flow fan, which can reduce the noise of the axial flow fan during working and improve the efficiency, the air volume and the air pressure of the axial flow fan.
To achieve the above object, in one aspect, the present invention provides a wind guide ring of an axial flow fan, including:
an air duct;
the diffuser extends outwards from one end of the air duct;
the guide vanes are uniformly distributed in the air guide cylinder along the circumferential direction and comprise a first end part, a second end part, a front edge and a tail edge, the first end part is fixed on the inner wall of the air guide cylinder, the second end part is opposite to the first end part, the front edge deviates from the opening direction of the diffuser, the tail edge faces the opening direction of the diffuser, the surface of the guide vane facing the diffuser is a pressure surface, and the surface of the guide vane deviating from the diffuser is a suction surface;
the protective net comprises a plurality of spliced circular rings which are distributed along the radial direction of the air guide cylinder, each spliced circular ring comprises a plurality of circular arc sections, and each circular arc section is connected between two adjacent guide vanes;
one end of the arc section is fixed at a position where the suction surface of one guide vane is close to the trailing edge, and the other end of the arc section is fixed at a position where the pressure surface of the other guide vane is close to the leading edge.
Preferably, the thickness of the arc section along the axial direction of the air duct is not more than one fourth of the thickness of the guide vane along the axial direction of the air duct.
Preferably, in an orientation of the diffuser opening, a highest point of the first end portion is lower than a highest point of the second end portion.
Preferably, the guide vane comprises a straight section and a bent section which are connected with each other, one end of the straight section is the second end portion, the bent section is bent towards the direction far away from the opening of the diffuser, and one end of the bent section is the first end portion.
Preferably, the length ratio of the straight section to the bent section in the radial direction is 3:1-1: 1.
Preferably, the cross-sectional shape of the side wall of the diffuser portion along the longitudinal direction is a straight line, an arc line, a curved line or a multi-segment spliced arc line.
Preferably, a fixing portion is disposed at a center of the air duct, and the second end portions of the plurality of guide vanes are fixed to the fixing portion in a circumferential direction.
Preferably, the number of guide vanes is at least 11.
Preferably, the air guide duct, the diffuser, the guide vane, the protective net, and the fixing portion are integrally formed.
On the other hand, the invention provides an axial flow fan, which comprises the air guide ring of the axial flow fan.
The invention has the beneficial effects that: according to the air guide ring of the axial flow fan and the axial flow fan, the protective nets of the arc sections are integrated on the guide vanes of the air guide ring, the two ends of each arc section are respectively fixed at the positions, close to the tail edges, of the suction surfaces and the positions, close to the front edges, of the pressure surfaces of the two adjacent guide vanes, the protective nets of the arc sections are obliquely distributed in the axial direction of the air guide ring, the arc sections are distributed in a stepped manner in the radial direction, the time of the tail traces of the impellers impacting the front ends of the protective nets is staggered, and the noise of the axial flow fan can be reduced. In addition, the first end part of the guide vane is fixed in the air duct and is not connected with the diffuser of the air guide ring, so that the shape of the diffuser is not damaged, the kinetic energy is recovered, the static pressure and the efficiency of the axial flow fan are increased, the flow velocity of air flow is reduced through the diffuser, and the noise generated when the air flow impacts the guide vane and the protective net is further reduced.
Drawings
FIG. 1 is a schematic view of an air guide ring of an axial flow fan of the present invention;
FIG. 2 is a schematic cross-sectional view of an air guide ring of the axial flow fan of the present invention.
In the figure: 1. an air duct; 2. a diffuser; 3. a guide vane; 31. a pressure surface; 32. a suction surface; 4. a protective net; 41. a circular arc section; 5. a fixed part.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The air guide ring of the axial flow fan and the axial flow fan provided by the invention are suitable for the axial flow fan, the noise generated by the airflow impacting the protective screen 4 can be reduced, the structure of the diffuser 2 part of the air guide ring is not damaged, the static pressure and the efficiency of the axial flow fan are improved, and the noise generated by the airflow impacting the guide vane 3 and the protective screen 4 is further reduced. The structure of the air guide ring and the axial flow fan of the invention is described in the following embodiments.
The air guide ring of the axial flow fan provided by the embodiment comprises an air guide cylinder 1, a diffusion part 2, a guide vane 3 and a protective net 4, wherein the air guide cylinder 1 is a main body part of the air guide ring, and the diffusion part 2 extends outwards from one end of the air guide cylinder 1 and is used for recovering certain kinetic energy of air flow to increase pressure, so that the static pressure and the efficiency of the axial flow fan are improved, the air guide ring can also be used for reducing the flow velocity of the air flow and reducing noise generated when the air flow collides with the guide vane 3 and the protective net 4. One end of the guide vane 3 is fixed on the inner wall of the air duct 1 and used for recovering kinetic energy and converting the kinetic energy into potential energy, so that the static pressure and the efficiency of the axial flow fan are improved. The protective net 4 comprises a plurality of splicing circular rings which are distributed along the radial direction of the air duct 1, each splicing circular ring comprises a plurality of circular arc sections 41, and each circular arc section 41 is connected between two adjacent guide vanes 3 and used for avoiding collision between an impeller of the axial flow fan and foreign matters.
In this embodiment, as shown in fig. 1, a fixing portion 5 is disposed at the center of the air duct 1, the second end portions of the plurality of guide vanes 3 are fixed to the fixing portion 5 along the circumferential direction, and the fixing portion 5 is used for fixing the motor and the impeller.
In this embodiment, as shown in fig. 2, on the cross section passing through the axis of the air guide duct 1, the shape extended by the diffuser 2 is a straight line, an arc line, a curve or an arc line formed by splicing multiple sections, the diffuser 2 with different shapes can meet the requirements of efficiency and noise of axial flow fans with different models, and in the production operation of the axial flow fans, the air guide rings with diffuser 2 with different shapes can be produced according to requirements.
In this embodiment, as shown in fig. 1 and fig. 2, the guide vane 3 includes a first end portion, a second end portion, a leading edge and a trailing edge, the first end portion is fixed on the inner wall of the air duct 1, the second end portion is opposite to the first end portion, the leading edge deviates from the opening direction of the diffuser 2, the trailing edge faces the opening direction of the diffuser 2, the surface of the guide vane 3 facing the diffuser 2 is a pressure surface 31, the surface of the guide vane 3 deviating from the diffuser 2 is a suction surface 32, the first end portion of the guide vane 3 is fixed on the inner wall of the air duct 1, and the diffuser 2 of the air guide ring is not connected, so that the shape of the diffuser 2 is not damaged, the static pressure and the efficiency of the axial flow fan can be increased by the recovered kinetic energy, the flow velocity of the air flow is reduced by the diffuser, and the. Further, the guide vanes 3 are multiple, the guide vanes 3 are uniformly distributed in the air guide cylinder 1 along the circumferential direction, the effect of recovering kinetic energy of the guide vanes 3 can be improved, preferably, the number of the guide vanes 3 is at least 11, and the guide vanes 3 can be ensured to recover kinetic energy to all air flows.
Preferably, as shown in fig. 2, in the opening direction of the diffuser 2, the highest point of the first end of the guide vane 3 is lower than the highest point of the second end, and the fixing portion 5 is made to be close to the end of the diffuser 2 in the axial direction, so that the axial dimension of the axial flow fan can be reduced. In addition, when the axial size of the axial flow fan is determined, the highest point of the first end part is lower than the highest point of the second end part, under the condition that the first end part is located on the inner wall of the air duct 1, the distance between the impeller of the axial flow fan and part of the guide vanes 3 can be increased, and noise generated when the airflow impacts the guide vanes 3 and the protective net 4 is reduced. Further, the stator 3 includes interconnect's straight section and bending segment, and the one end of straight section is the second tip, and the bending segment is to keeping away from 2 opening directions of diffuser and the one end of bending segment and be the first end, and the setting of straight section can make partial stator 3 keep away from the impeller as far as, reduces the noise that impeller wake striking stator 3 and protection network 4 produced, and the setting of bending segment has then been guaranteed that the first end is in on the inner wall of guide duct 1. Furthermore, under the condition that the effect of the guide vane 3 is not influenced, the length ratio of the straight section to the bent section in the radial direction is 3:1-1:1, when the designed axial flow fan has high noise, the length ratio of the straight section to the bent section in the radial direction can be set to be 3:1, the part of the guide vane 3 far away from the impeller can be enlarged, the noise is reduced, and when the designed axial flow fan has low noise, the length ratio of the straight section to the bent section in the radial direction can be set to be 1:1, so that the processing difficulty is reduced. It is understood that the length ratio of the straight section to the bent section in the radial direction may be any one of the ratios of 3:1 to 1: 1.
In this embodiment, one end of the arc segment 41 of the protection net 4 is fixed at a position where the suction surface 32 of one of the guide vanes 3 is close to the trailing edge, and the other end of the arc segment 41 is fixed at a position where the pressure surface 31 of the other guide vane 3 is close to the leading edge, so that the protection net 4 of the arc segment 41 is obliquely distributed in the axial direction of the air guiding ring, and a plurality of arc segments 41 are distributed in a step shape in the radial direction, so that the time when the airflow hits the front end of the protection net 4 is staggered, and the noise is reduced. Further, the thickness of the arc section 41 in the axial direction of the air duct 1 is not more than one fourth of the thickness of the guide vane 3 in the axial direction of the air duct 1, so that the demolding of the protective net 4 is facilitated under the condition of ensuring the air quantity, the material consumption can be reduced, and the cost can be reduced.
Preferably, the air guide duct 1, the diffuser 2, the guide vane 3, the protective net 4, and the fixing portion 5 are integrally formed, so that the processing cost can be reduced, and additional protective net 4 does not need to be installed in additional man-hours.
The axial flow fan that this embodiment provided, including aforementioned axial flow fan's wind-guiding circle, this axial flow fan's noise is little, and is efficient, and amount of wind pressure is big.
According to the air guide ring of the axial flow fan and the axial flow fan, the protective nets 4 of the arc sections 41 are integrated on the guide vanes 3, and two ends of each arc section 41 are respectively fixed at the positions, close to the trailing edges, of the suction surfaces 32 and the positions, close to the leading edges, of the pressure surfaces 31 of two adjacent guide vanes 3, so that the protective nets 4 of the arc sections 41 are obliquely distributed in the axial direction of the air guide ring, and a plurality of arc sections 41 are distributed in a step shape in the radial direction, the time of the tail of the impeller impacting the front ends of the protective nets 4 is staggered, and the noise of the axial flow fan can be reduced; the first end of the guide vane 3 is fixed in the air duct 1, the first end is not connected with the diffuser 2 of the air guide ring, the shape of the diffuser 2 is not damaged, the static pressure and the efficiency of the axial flow fan can be increased through the recovered kinetic energy, the flow velocity of air flow is reduced through the diffuser, the noise generated when the air flow impacts the guide vane 3 and the protective screen 4 is further reduced, in addition, the guide vane 3 is a straight section and a bent section, the distance between the guide vane 3 and an impeller can be reduced, and the noise of the axial flow fan is further reduced.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides an axial fan's wind-guiding circle which characterized in that includes:
an air duct (1);
the diffuser (2) extends outwards from one end of the air duct (1);
the guide vanes (3) are uniformly distributed in the air guide cylinder (1) along the circumferential direction, each guide vane (3) comprises a first end part, a second end part, a front edge and a tail edge, the first end part is fixed on the inner wall of the air guide cylinder (1), the second end part is opposite to the first end part, the front edge deviates from the opening direction of the diffuser (2), the tail edge faces the opening direction of the diffuser (2), the surface of each guide vane (3) facing the diffuser (2) is a pressure surface (31), and the surface of each guide vane (3) deviating from the diffuser (2) is a suction surface (32);
the protective net (4) comprises a plurality of splicing circular rings which are distributed along the radial direction of the air guide cylinder (1), each splicing circular ring comprises a plurality of circular arc sections (41), and each circular arc section (41) is connected between two adjacent guide vanes (3);
one end of the circular arc section (41) is fixed at a position, close to the trailing edge, of the suction surface (32) of one of the guide vanes (3), and the other end of the circular arc section (41) is fixed at a position, close to the leading edge, of the pressure surface (31) of the other guide vane (3).
2. The wind deflector of an axial flow fan according to claim 1, wherein the thickness of the circular arc section (41) in the axial direction of the wind guide cylinder (1) is not more than a quarter of the thickness of the guide vane (3) in the axial direction of the wind guide cylinder (1).
3. The wind-guiding ring of axial fan according to claim 2, characterized in that the highest point of the first end is lower than the highest point of the second end in the opening direction of the diffuser (2).
4. The wind guide ring of the axial flow fan according to claim 3, wherein the guide vane (3) comprises a straight section and a bent section which are connected with each other, one end of the straight section is the second end portion, the bent section is bent towards the direction away from the opening of the diffuser (2), and one end of the bent section is the first end portion.
5. The wind guide ring of the axial flow fan according to claim 4, wherein the length ratio of the straight section to the bent section in the radial direction is 3:1-1: 1.
6. The wind-guiding ring of axial flow fan according to any one of claims 1 to 5, wherein the cross-sectional shape of the sidewall of the diffuser (2) along the longitudinal direction is a straight line, an arc line, a curved line or a multi-segment spliced arc line.
7. The wind-guiding ring of axial flow fan according to any one of claims 1 to 5, wherein a fixing portion (5) is provided at the center of the wind-guiding cylinder (1), and the second end portions of the plurality of guide vanes (3) are circumferentially fixed to the fixing portion (5).
8. The wind-guiding ring of the axial flow fan according to any one of claims 1 to 7, wherein the number of the guide vanes (3) is at least 11.
9. The wind-guiding circle of axial fan of claim 7, characterized in that, the wind-guiding barrel (1), the diffuser (2), the guide vane (3), the protective screen (4) and the fixing portion (5) are integrally formed.
10. An axial flow fan, comprising the air guide ring of the axial flow fan as claimed in any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011025721.XA CN112032110A (en) | 2020-09-25 | 2020-09-25 | Axial fan's wind-guiding circle and axial fan |
| PCT/CN2021/114953 WO2022062832A1 (en) | 2020-09-25 | 2021-08-27 | Air guide ring of axial flow fan and axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011025721.XA CN112032110A (en) | 2020-09-25 | 2020-09-25 | Axial fan's wind-guiding circle and axial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112032110A true CN112032110A (en) | 2020-12-04 |
Family
ID=73575543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011025721.XA Pending CN112032110A (en) | 2020-09-25 | 2020-09-25 | Axial fan's wind-guiding circle and axial fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112032110A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022062832A1 (en) * | 2020-09-25 | 2022-03-31 | 依必安派特风机(上海)有限公司 | Air guide ring of axial flow fan and axial flow fan |
| CN114688717A (en) * | 2020-12-30 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Wind-guiding structure, fan structure and air conditioner |
-
2020
- 2020-09-25 CN CN202011025721.XA patent/CN112032110A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022062832A1 (en) * | 2020-09-25 | 2022-03-31 | 依必安派特风机(上海)有限公司 | Air guide ring of axial flow fan and axial flow fan |
| CN114688717A (en) * | 2020-12-30 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Wind-guiding structure, fan structure and air conditioner |
| CN114688717B (en) * | 2020-12-30 | 2023-09-05 | 广东美的白色家电技术创新中心有限公司 | Air guide structure, fan structure and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080253897A1 (en) | Axial Flow Fan | |
| JP6493682B2 (en) | Centrifugal fan | |
| US20100189557A1 (en) | Impeller and fan | |
| CN101910645A (en) | Propeller fan | |
| CN112032110A (en) | Axial fan's wind-guiding circle and axial fan | |
| US20100092286A1 (en) | Axial flow fan | |
| CN101725566A (en) | Middle-bent axial flow fan blade | |
| CN111156198A (en) | Volute with stepped variable-radius volute tongue and centrifugal ventilator | |
| CN109026830B (en) | Centrifugal impeller | |
| WO2022062832A1 (en) | Air guide ring of axial flow fan and axial flow fan | |
| CN212318379U (en) | Axial fan's wind-guiding circle and axial fan | |
| CN214304538U (en) | Novel wind-guiding circle for axial fan | |
| CN101208523B (en) | Centrifugal type multipleblade fan | |
| CN214465105U (en) | High-efficiency low-noise centrifugal fan | |
| CN108005956B (en) | Volute structure for automobile air conditioner | |
| CN203130602U (en) | Cross-flow fan for air conditioner, cross-flow blower and air conditioner | |
| JP4519734B2 (en) | Rotating impeller and propeller fan | |
| CN100560984C (en) | Centrifugal multi-blade fan | |
| CN214661053U (en) | Flow guide type axial flow wind wheel and axial flow fan with same | |
| CN212360302U (en) | Guide vane of axial flow fan and axial flow fan | |
| CN211144903U (en) | Low-noise volute and centrifugal ventilator | |
| JPH09137970A (en) | Outdoor unit for air conditioner | |
| CN111120406A (en) | Method for increasing air volume of centrifugal fan | |
| CN217873415U (en) | Blade and impeller, forward centrifugal fan and range hood with same | |
| CN212360304U (en) | Axial flow fan blade and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240529 Address after: 201300 buildings 19, 21, 24, 26, 27, 28, 29, 30, 32 and 33, No. 399, Xuanzhong Road, Nanhui Industrial Park, Pudong New Area, Shanghai Applicant after: EBM papst motor (Shanghai) Co.,Ltd. Country or region after: China Address before: No. 418, Huajing Road, pilot Free Trade Zone, Pudong New Area, Shanghai 200131 Applicant before: EBM-PAPST VENTILATOR (SHANGHAI) Co.,Ltd. Country or region before: China |