CN216665974U - Impeller of axial flow fan, axial flow fan and ventilation treatment equipment - Google Patents
Impeller of axial flow fan, axial flow fan and ventilation treatment equipment Download PDFInfo
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- CN216665974U CN216665974U CN202123007750.6U CN202123007750U CN216665974U CN 216665974 U CN216665974 U CN 216665974U CN 202123007750 U CN202123007750 U CN 202123007750U CN 216665974 U CN216665974 U CN 216665974U
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Abstract
The utility model relates to the field of ventilation treatment equipment, and discloses an impeller of an axial flow fan, the axial flow fan and ventilation treatment equipment. The impeller comprises a hub (1) and a plurality of blades (2), wherein one end of each blade (2) is connected to the outer peripheral surface of the hub (1), the blades (2) are uniformly arranged at intervals along the circumferential direction of the hub (1), and a flow guide structure is arranged on the windward side of each blade (2) and used for guiding airflow to flow from the front edge (21) to the tail edge (22) of each blade (2) along the width direction of each blade (2). According to the impeller of the axial flow fan, the guide structure for guiding airflow to flow from the front edge to the tail edge of the blade is arranged on the windward side of the blade through the technical scheme, so that the vortex noise formed by the detachment of the boundary layer of the tail edge can be reduced, and the noise reduction of the impeller is realized.
Description
Technical Field
The utility model relates to the field of ventilation treatment equipment, in particular to an impeller of an axial flow fan, the axial flow fan comprising the impeller and ventilation treatment equipment comprising the axial flow fan.
Background
In a ventilation treatment device, such as a respirator, an axial flow fan is generally adopted as a power component to provide a gas source, and is a core working component of the respirator. The axial flow fan usually needs higher rotating speed in order to reach higher pressure, so the rotating speed of the axial flow fan is generally higher in the using process, and the stripping caused by the high-speed rotating blades in the axial flow fan can form vortex, so that higher noise is caused. Noise reduction for the impeller of an axial flow fan is a technical difficulty which is expected to be broken through all the time.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide an impeller of an axial flow fan, an axial flow fan including the impeller, and a ventilation therapy apparatus including the axial flow fan, so as to solve the above-mentioned problems.
In order to achieve the above object, a first aspect of the present invention provides an impeller of an axial flow fan, the impeller including a hub and a plurality of blades, one end of each blade being connected to an outer circumferential surface of the hub, the plurality of blades being uniformly spaced apart in a circumferential direction of the hub, a wind guide structure being provided on a windward surface of each blade, the wind guide structure being configured to guide an airflow from a leading edge to a trailing edge of the blade in a width direction of the blade.
Optionally, the flow guide structure includes a plurality of flow guide ribs extending along the width direction of the blade, and the plurality of flow guide ribs are arranged at intervals along the length direction of the blade to form an airflow channel between adjacent flow guide ribs.
Optionally, the flow-guiding rib extends from the leading edge to a middle of the blade.
Optionally, the ratio of the length of the flow guiding ribs to the width of the blades is 1: 2 to 1: 3.
Optionally, the height of the flow guiding rib is set to gradually decrease along the extending direction.
Optionally, the top surface of the flow guiding rib is formed into a cambered surface.
Optionally, the ratio of the maximum height of the flow guiding ribs to the height of the blades is 1: 42 to 1: 46.
Optionally, the blade is a twisted plate-shaped blade.
The utility model provides an axial flow fan, which comprises a shell, a motor and an impeller of the axial flow fan, wherein the impeller and the motor are arranged in the shell, and the motor is connected with the impeller to drive the impeller to rotate.
A third aspect of the utility model provides a ventilation therapy device comprising an axial fan as described above.
According to the impeller of the axial flow fan, the guide structure for guiding airflow to flow from the front edge to the tail edge of the blade is arranged on the windward side of the blade through the technical scheme, so that the vortex noise formed by the detachment of the boundary layer of the tail edge can be reduced, and the noise reduction of the impeller is realized.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a perspective view of one embodiment of an impeller of the present invention;
FIG. 2 is a perspective view of another angle of the impeller of FIG. 1;
FIG. 3 is a front view of the impeller of FIG. 2;
FIG. 4 is a rear view of the impeller of FIG. 3;
fig. 5 is a side view of the impeller of fig. 3.
Description of the reference numerals
1-hub, 2-blade, 21-front edge, 22-tail edge, 3-flow guiding rib, 4-airflow channel and 5-protective rib plate.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The first aspect of the present invention provides an impeller of an axial flow fan, the impeller includes a hub 1 and a plurality of blades 2, one end of each blade 2 is connected to the outer circumferential surface of the hub 1, the plurality of blades 2 are uniformly spaced along the circumference of the hub 1, and a flow guiding structure is provided on the windward surface (see the upper surface of the blade in fig. 1) of each blade 2, and the flow guiding structure is used for guiding airflow to flow from the leading edge 21 to the trailing edge 22 of the blade 2 along the width direction of the blade 2.
In the above, it should be noted that the leading edge 21 of the blade 2 refers to one side edge of the blade 2 which is first contacted with the airflow during the rotation process, see fig. 3.
According to the impeller of the axial flow fan, the flow guide structure for guiding airflow to flow from the front edge 21 to the tail edge 22 of the blade 2 is arranged on the windward side of the blade 2 through the technical scheme, so that the vortex noise formed by the detachment of the boundary layer of the tail edge can be reduced, and the noise reduction of the impeller is realized. According to the utility model, the noise reduction is realized by improving the blades, no redundant auxiliary structure is needed to be added, and the cost is lower.
Specifically, referring to the preferred embodiment shown in fig. 1 to 5, the flow guiding structure includes a plurality of flow guiding ribs 3 extending along the width direction of the blade 2, and the plurality of flow guiding ribs 3 are arranged at intervals along the length direction of the blade 2 to form an air flow channel 4 between adjacent flow guiding ribs 3. It should be noted that the flow guiding ribs 3 can also be used as reinforcing ribs to enhance the strength of the blade while guiding the flow, so as to reduce the vibration of the blade in the use process, and further reduce the deterioration of the overall aerodynamic performance of the fan and the generated vibration noise caused by the vibration of the blade.
Wherein, preferably, the width of the air flow channel 4 is kept uniform along the extending direction thereof. The plurality of air flow channels 4 are equal in width.
Wherein, in order to reduce the drawing of patterns degree of difficulty of blade, water conservancy diversion muscle 3 is preferred to be welded on blade 2.
Preferably, as shown in fig. 3, the impeller includes 9 blades 2, and each blade 2 is provided with 4 flow guide ribs 3 to form 3 airflow channels 4.
Preferably, as shown in fig. 3, the flow guiding rib 3 extends from the front edge 21 of the blade 2 to the middle of the blade 2 (i.e., the position between the front edge 21 and the tail edge 22). The ratio of the length of the diversion ribs 3 to the width of the blades 2 is 1: 2-1: 3.
As shown in fig. 1 and 2, the height of the flow guiding rib 3 is preferably set to gradually decrease along the extending direction (i.e. the direction from the leading edge 21 to the trailing edge 22 of the blade 2). The top surface of the air guide rib 3 is preferably formed into a cambered surface.
Wherein the ratio of the maximum height of the flow guiding ribs 3 (i.e. the height at the leading edge 21) to the height of the blades 2 (i.e. the length of the blades 2 in the radial direction of the hub 1) is 1: 42-1: 46.
In the present invention, the blade 2 is a twisted plate-shaped blade, that is, the blade 2 is twisted clockwise or counterclockwise outward in the radial direction of the hub 1. It will be understood that the extending direction of the plurality of flow guiding ribs 3 is correspondingly changed along with the twist of the blade 2 according to different arrangement positions.
In the utility model, as shown in fig. 2, one end of the blade 2 far away from the hub 1 is provided with a protective rib plate 5, and the protective rib plate 5 is arranged on the windward side of the blade 2. When the impeller is out of order and deformed, the protective rib plates 5 can prevent the blade 2 from being in contact with the shell of the axial flow fan to break.
In a second aspect, the present invention provides an axial flow fan, which includes a casing, a motor, and an impeller of the axial flow fan, wherein the impeller and the motor are installed in the casing, and the motor is connected to the impeller to drive the impeller to rotate.
A third aspect of the utility model provides a ventilation therapy device comprising the above axial fan.
Wherein, the ventilation treatment equipment can be a breathing machine, an oxygen therapy instrument and the like.
The ventilation therapy device can comprise a host machine used as a gas source, a ventilation pipeline and a patient interface device, wherein the axial flow fan is arranged in the host machine, one end of the ventilation pipeline is connected to a gas outlet of the host machine, and the other end of the ventilation pipeline is connected to the patient interface device. Wherein the patient interface device may be a respiratory mask, nasal oxygen tube, or the like for connection to the mouth and/or nose of a patient for inhalation of a respiratory gas by the patient.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the utility model. The utility model is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The impeller of the axial flow fan is characterized by comprising a hub (1) and a plurality of blades (2), wherein one end of each blade (2) is connected to the outer peripheral surface of the hub (1), the blades (2) are uniformly arranged at intervals along the circumferential direction of the hub (1), and a flow guide structure is arranged on the windward side of each blade (2) and used for guiding airflow to flow from the front edge (21) to the tail edge (22) of each blade (2) along the width direction of each blade (2).
2. The impeller of the axial flow fan according to claim 1, wherein the flow guiding structure comprises a plurality of flow guiding ribs (3) extending along the width direction of the blade (2), and the plurality of flow guiding ribs (3) are arranged at intervals along the length direction of the blade (2) to form an air flow channel (4) between the adjacent flow guiding ribs (3).
3. The impeller of an axial fan according to claim 2, characterized in that the flow guiding ribs (3) extend from the leading edge (21) to the middle of the blade (2).
4. Impeller for an axial fan according to claim 3, characterized in that the ratio between the length of the flow guiding ribs (3) and the width of the blades (2) is 1: 2-1: 3.
5. The impeller of an axial fan according to claim 3, characterized in that the height of the flow guiding ribs (3) is arranged to decrease gradually in the extension direction.
6. The impeller of an axial fan according to claim 5, characterized in that the top surface of the flow guiding rib (3) is formed as a cambered surface.
7. Impeller for an axial fan according to claim 5, characterised in that the ratio between the maximum height of the flow-guiding ribs (3) and the height of the blades (2) is 1: 42-1: 46.
8. The impeller of an axial fan according to any one of claims 1 to 7, characterized in that said blades (2) are twisted plate-shaped blades.
9. An axial flow fan comprising a housing, a motor, and an impeller of the axial flow fan of any one of claims 1 to 8, wherein the impeller and the motor are mounted in the housing, and the motor is connected to the impeller to drive the impeller to rotate.
10. A ventilation therapy device, characterized in that it comprises an axial fan according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123007750.6U CN216665974U (en) | 2021-12-02 | 2021-12-02 | Impeller of axial flow fan, axial flow fan and ventilation treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123007750.6U CN216665974U (en) | 2021-12-02 | 2021-12-02 | Impeller of axial flow fan, axial flow fan and ventilation treatment equipment |
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| Publication Number | Publication Date |
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| CN216665974U true CN216665974U (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123007750.6U Active CN216665974U (en) | 2021-12-02 | 2021-12-02 | Impeller of axial flow fan, axial flow fan and ventilation treatment equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115596707A (en) * | 2022-12-15 | 2023-01-13 | 佛山市南海九洲普惠风机有限公司（Cn） | Axial-flow impeller with vortex generator |
-
2021
- 2021-12-02 CN CN202123007750.6U patent/CN216665974U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115596707A (en) * | 2022-12-15 | 2023-01-13 | 佛山市南海九洲普惠风机有限公司（Cn） | Axial-flow impeller with vortex generator |
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