CN112303004A - Mixed flow fan blade, air duct structure and air conditioner indoor unit - Google Patents
Mixed flow fan blade, air duct structure and air conditioner indoor unit Download PDFInfo
- Publication number
- CN112303004A CN112303004A CN201910713904.1A CN201910713904A CN112303004A CN 112303004 A CN112303004 A CN 112303004A CN 201910713904 A CN201910713904 A CN 201910713904A CN 112303004 A CN112303004 A CN 112303004A
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- blade
- hub
- flow fan
- mixed flow
- fan blade
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
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Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a mixed flow fan blade, an air duct structure and an air conditioner indoor unit, wherein the mixed flow fan blade comprises: a hub; the blades are arranged on the outer peripheral surface of the hub along the circumferential direction of the hub, a flow guide gap is formed between every two adjacent blades, and the flow guide gap is provided with a circumferential air outlet, so that at least part of air flow entering the flow guide gap flows along the radial direction of the hub under the centrifugal action of the blades and flows out of the circumferential air outlet. Through the technical scheme provided by the invention, the technical problem that the air inlet and outlet directions of the mixed flow fan blade in the prior art are limited can be solved.
Description
Technical Field
The invention relates to the technical field of mixed flow fan blades, in particular to a mixed flow fan blade, an air duct structure and an air conditioner indoor unit.
Background
At present, a mixed flow fan blade generally comprises a fan blade hub, a fan blade and a fan blade outer ring, and is characterized in that the width of an inlet blade is large, the width of an outlet blade is small (generally far smaller than the maximum radius of the hub), an outlet angle is inclined upwards, the distortion degree of the blade shape is greatly changed, and the inlet angle and the outlet angle of the fan blade have large angle deviation so as to meet the requirements of air inlet at a lower air inlet and air outlet at an upper air outlet.
However, the mixed flow fan blade in the prior art has limited air inlet and outlet directions, and has poor centrifugal effect due to the influence of the shape of the fan blade.
Disclosure of Invention
The invention mainly aims to provide a mixed flow fan blade, an air duct structure and an air conditioner indoor unit, and aims to solve the technical problem that the air inlet and outlet directions of the mixed flow fan blade in the prior art are limited.
In order to achieve the above object, according to an aspect of the present invention, there is provided a mixed flow fan blade, including: a hub; the blades are arranged on the outer peripheral surface of the hub along the circumferential direction of the hub, a flow guide gap is formed between every two adjacent blades, and the flow guide gap is provided with a circumferential air outlet, so that at least part of air flow entering the flow guide gap flows along the radial direction of the hub under the centrifugal action of the blades and flows out of the circumferential air outlet.
Furthermore, the hub is of a cone frustum structure, the first end of each blade is connected with the large-diameter end of the hub, and the second end of each blade is connected with the small-diameter end of the hub; the side of keeping away from the wheel hub of two adjacent blades forms circumference air outlet.
Further, the radius of the outer circumference of the large diameter end of the hub is R1The width of the first end of the blade is b1Wherein b is1≥ R1。
Further, the first end of the blade has a width b1The width of the second end of the blade is b2，b2＞b1。
Further, the air outlet angle at the first end of the blade is theta1Leaves of Chinese medicineThe air outlet angle at the second end of the sheet is theta2，15°≤θ2-θ1≤20°。
Further, the length of the blade in the axial extension direction of the hub is h, and the radius of the outer circumference circle of the large-diameter end of the hub is R1， h＞R1。
Further, the terminal surface of the first end of blade is the plane, and the terminal surface of the first end of blade and the terminal surface parallel and level of the big footpath end of wheel hub set up.
Further, the end surface of the first end of the blade is a plane, and the end surface of the first end of the blade is obliquely arranged in the direction close to the second end of the blade.
Further, the angle between the end surface of the first end of the blade and the end surface of the large diameter end of the hub is θ3Wherein 0 DEG < theta3≤20°。
Further, the terminal surface of the second end of blade is the plane, and the terminal surface of the second end of blade sets up with the terminal surface parallel and level of the path end of wheel hub.
Furthermore, the end surface of the second end of the blade is a plane, and the end surface where the second end of the blade is located is obliquely arranged in the direction far away from the first end of the blade.
Further, the angle between the end surface of the second end of the blade and the end surface of the small diameter end of the hub is theta4Wherein 0 DEG < theta4≤30°。
According to another aspect of the present invention, an air duct structure is provided, which includes an air duct casing and a mixed flow fan blade, wherein the mixed flow fan blade is disposed in the air duct casing.
According to another aspect of the invention, an air conditioner indoor unit is provided, and the air conditioner indoor unit comprises an air duct structure.
By applying the technical scheme of the invention, the guide gap is formed between two adjacent blades and is provided with the circumferential air outlet, so that at least part of air flow entering the guide gap flows along the radial direction of the hub under the centrifugal action of the blades and flows out along the circumferential air outlet, the air outlet range of the mixed flow fan blade is enlarged, and the centrifugal effect of the mixed flow fan blade is improved. Therefore, the technical problem that the air inlet and outlet direction of the mixed flow fan blade is limited in the prior art can be solved through the technical scheme provided by the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural diagram of a mixed flow fan blade provided according to an embodiment of the present invention;
fig. 2 shows a front view of a mixed flow fan blade provided according to an embodiment of the present invention;
fig. 3 shows a cross-sectional view of a mixed flow fan blade provided according to an embodiment of the present invention;
fig. 4 shows a top view of a mixed flow fan blade provided according to an embodiment of the present invention; and
fig. 5 shows a structural schematic diagram of a blade of a mixed flow fan blade provided according to an embodiment of the invention.
Wherein the figures include the following reference numerals:
10. a hub; 11. a large diameter end; 12. a small diameter end; 20. a blade; 30. and a circumferential air outlet.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 5, a first embodiment of the present invention provides a mixed flow fan blade, which includes a hub 10 and a plurality of blades 20. The plurality of blades 20 are arranged on the outer circumferential surface of the hub 10 along the circumferential direction of the hub 10, a guide gap is formed between every two adjacent blades 20, and the guide gap is provided with a circumferential air outlet 30, so that at least part of air flow entering the guide gap flows along the radial direction of the hub 10 under the centrifugal action of the blades 20 and flows out of the circumferential air outlet 30. Meanwhile, the mixed flow fan blade in the embodiment also has the effect of supplying air upwards through the axial flow. By adopting the mixed flow fan blade provided by the embodiment, the circumferential air outlet 30 can be conveniently formed by removing the outer ring of the fan blade, the air outlet range of the mixed flow fan blade can be enlarged through the circumferential air outlet 30, and the centrifugal effect of the mixed flow fan blade is improved. Therefore, through the mixed flow fan blade that this embodiment provided, can solve the limited technical problem of air-out direction among the prior art, improved the centrifugal effect of mixed flow fan blade simultaneously.
Specifically, the hub 10 in this embodiment may have a truncated cone structure, a first end of the blade 20 is connected to the large-diameter end 11 of the hub 10, and a second end of the blade 20 is connected to the small-diameter end 12 of the hub 10. The side edges of the two adjacent blades 20 far away from the hub 10 form a circumferential air outlet 30 so as to increase the air outlet range of the mixed flow fan blade and better improve the centrifugal effect of the mixed flow fan blade. The hub 10 in this embodiment is not limited to the truncated cone structure, and the hub 10 may also have a cylindrical structure.
In the present embodiment, the radius of the outer circumference of the large diameter end 11 of the hub 10 is R1The width of the first end of the blade 20 is b1Wherein b is1≥R1. By adopting the arrangement, the width of the first end of the blade 20 is increased, so that a negative pressure area can be formed at the position, close to the hub 10, of the blade 20, and the centrifugal effect of the mixed flow fan blade can be improved better.
Specifically, the width of the first end of the blade 20 in this embodiment is b1The second end of the blade 20 has a width b2，b2＞b1. By adopting the arrangement, the mixed flow effect can be better achieved. Specifically, the width of the first end of the blade 20 may be equal to or similar to the width of the second end of the blade 20.
In the present embodiment, the wind outlet angle at the first end of the blade 20 is θ1The air outlet angle at the second end of the blade 20 is theta2，15°≤θ2-θ1Is less than or equal to 20 degrees. Specifically, the air outlet angle at the first end of the blade 20 refers to an included angle between a tangent line at the first end of the blade 20 and the axis of the hub 10, and the air outlet angle at the second end of the blade 20 refers to a tangent line at the second end of the blade 20 and the hub 10 angle between the axes. By adopting the arrangement, the arc-shaped inclination angle of the blade 20 is small, so that the centrifugal effect when the mixed flow fan blade applies work is better realized, and the blade 20 has the effect of a centrifugal fan when rotating. Under the condition of increasing the matching of the molded lines of the volute, the air outlet mode of the centrifugal fan can be realized, and the development requirements of more air-conditioning products can be met.
In the present embodiment, the length of the blade 20 in the axial extension direction of the hub 10 is h, and the radius of the outer circumference of the large diameter end 11 of the hub 10 is R1，h＞R1. With such an arrangement, the centrifugal effect can be improved more effectively.
Specifically, the end surface of the first end of the blade 20 is a plane, and the end surface of the first end of the blade 20 may be flush with the end surface of the large diameter end 11 of the hub 10. With such an arrangement, the airflow can be better guided by the blades 20 to better improve the centrifugal effect.
Specifically, the end surface of the first end of the blade 20 is a flat surface, and the end surface of the first end of the blade 20 may be disposed to be inclined in a direction approaching the second end of the blade 20.
Specifically, the angle between the end surface of the first end of the blade 20 and the end surface of the large diameter end 11 of the hub 10 is θ3Wherein 0 DEG < theta3Is less than or equal to 20 degrees. Generally, a smaller angle is better, which facilitates better directing of the airflow by the blades 20.
Specifically, the end surface of the second end of the blade 20 is a plane, so that the end surface of the second end of the blade 20 is flush with the end surface of the small-diameter end 12 of the hub 10. With this arrangement, the second end of the vane 20 can facilitate the direction of the airflow.
Specifically, the end surface of the second end of the blade 20 is a plane, and the end surface where the second end of the blade 20 is located may be disposed obliquely in a direction away from the first end of the blade 20.
Specifically, the angle between the end surface of the second end of the blade 20 and the end surface of the small-diameter end 12 of the hub 10 is θ4Wherein 0 DEG < theta4Is less than or equal to 30 degrees. With this arrangement, the second end-to-end flow of the blade 20 can be facilitatedThe driving of the fan can also avoid the influence on the dynamic balance effect of the mixed flow fan blade.
The second embodiment of the invention provides an air duct structure, which comprises an air duct shell and mixed flow fan blades, wherein the mixed flow fan blades are arranged in the air duct shell, and the mixed flow fan blades are the mixed flow fan blades provided by the first embodiment.
The third embodiment of the invention provides an air conditioner indoor unit, which comprises an air duct structure, wherein the air duct structure is the air duct structure provided by the second embodiment.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the air outlet range is enlarged, and the centrifugal effect is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A mixed flow fan blade is characterized by comprising:
a hub (10);
the air flow guiding device comprises a plurality of blades (20), wherein the blades (20) are arranged on the outer peripheral surface of the hub (10) along the circumferential direction of the hub (10), a flow guiding gap is formed between every two adjacent blades (20), and the flow guiding gap is provided with a circumferential air outlet (30), so that at least part of air flow entering the flow guiding gap flows along the radial direction of the hub (10) under the centrifugal action of the blades (20) and flows out of the circumferential air outlet (30).
2. The mixed flow fan blade of claim 1, wherein the hub (10) is of a truncated cone structure, a first end of the blade (20) is connected with a large-diameter end (11) of the hub (10), and a second end of the blade (20) is connected with a small-diameter end (12) of the hub (10); the side edges of two adjacent blades (20) far away from the hub (10) form the circumferential air outlet (30).
3. A mixed flow fan blade according to claim 2 in which the radius of the outer circumference of the large diameter end (11) of the hub (10) is R1The width of the first end of the blade (20) is b1Wherein b is1≥R1。
4. A mixed flow fan blade according to claim 2 wherein the width of the first end of the blade (20) is b1The second end of the blade (20) has a width b2，b2＞b1。
5. The mixed flow fan blade of claim 2, wherein the wind outlet angle at the first end of the blade (20) is θ1The air outlet angle at the second end of the blade (20) is theta2，15°≤θ2-θ1≤20°。
6. A mixed flow fan blade according to claim 2, wherein the length of the blade (20) in the axial extension direction of the hub (10) is h, and the radius of the outer circumference of the large diameter end (11) of the hub (10) is R1，h＞R1。
7. The mixed flow fan blade as claimed in claim 2, wherein the end face of the first end of the blade (20) is a plane, and the end face of the first end of the blade (20) is flush with the end face of the large diameter end (11) of the hub (10).
8. The mixed flow fan blade as claimed in claim 2, wherein the end surface of the first end of the blade (20) is a plane, and the end surface of the first end of the blade (20) is arranged obliquely to the direction close to the second end of the blade (20).
9. Mixed flow fan blade according to claim 8, characterized in that the end face of the first end of the blade (20) is larger than the hub (10)The angle between the end faces of the radial ends (11) is theta3Wherein 0 DEG < theta3≤20°。
10. The mixed flow fan blade of claim 2, characterized in that, the terminal surface of the second end of the blade (20) is a plane, and the terminal surface of the second end of the blade (20) is arranged flush with the terminal surface of the small diameter end (12) of the hub (10).
11. The mixed flow fan blade as claimed in claim 2, wherein the end face of the second end of the blade (20) is a plane, and the end face where the second end of the blade (20) is located is obliquely arranged in a direction away from the first end of the blade (20).
12. A mixed flow fan blade according to claim 11, wherein the angle between the end surface of the second end of the blade (20) and the end surface of the small diameter end (12) of the hub (10) is θ4Wherein 0 DEG < theta4≤30°。
13. An air duct structure, characterized in that, the air duct structure includes an air duct casing and a mixed flow fan blade, the mixed flow fan blade is arranged in the air duct casing, the mixed flow fan blade is the mixed flow fan blade of any one of claims 1 to 12.
14. An indoor unit of an air conditioner, characterized in that the indoor unit of an air conditioner comprises an air duct structure as set forth in claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910713904.1A CN112303004A (en) | 2019-08-02 | 2019-08-02 | Mixed flow fan blade, air duct structure and air conditioner indoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910713904.1A CN112303004A (en) | 2019-08-02 | 2019-08-02 | Mixed flow fan blade, air duct structure and air conditioner indoor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112303004A true CN112303004A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910713904.1A Pending CN112303004A (en) | 2019-08-02 | 2019-08-02 | Mixed flow fan blade, air duct structure and air conditioner indoor unit |
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| CN (1) | CN112303004A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024140176A1 (en) * | 2022-12-29 | 2024-07-04 | 北京怡和嘉业医疗科技股份有限公司 | Centrifugal fan impeller, centrifugal fan assembly, and ventilatory therapy device |
-
2019
- 2019-08-02 CN CN201910713904.1A patent/CN112303004A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024140176A1 (en) * | 2022-12-29 | 2024-07-04 | 北京怡和嘉业医疗科技股份有限公司 | Centrifugal fan impeller, centrifugal fan assembly, and ventilatory therapy device |
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