CN112303003A - 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
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- CN112303003A CN112303003A CN201910713903.7A CN201910713903A CN112303003A CN 112303003 A CN112303003 A CN 112303003A CN 201910713903 A CN201910713903 A CN 201910713903A CN 112303003 A CN112303003 A CN 112303003A
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- mixed flow
- blade
- hub
- blades
- fan blade
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 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
- 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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or 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
- F04D29/66—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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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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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- 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
- F24F13/24—Means for preventing or suppressing noise
-
- 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
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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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 mixed flow blades are arranged on the peripheral surface of the hub; the rectifying blades are arranged on the outer peripheral surface of the hub, the rectifying blades and the mixed flow blades are arranged at intervals, the length of the rectifying blades in the axial extension direction of the hub is smaller than that of the mixed flow blades, and one ends of the rectifying blades extend to the end part of the hub so as to rectify air flow at the mixed flow blades through the rectifying blades. Through the technical scheme provided by the invention, the technical problem that vortex flow can occur between mixed flow blades of the mixed flow fan blade in the prior art 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 in the prior art generally comprises a hub and a mixed flow blade, wherein the mixed flow blade is arranged on the hub. Generally, the problem of operation noise is controlled by controlling the number of the blades of the fan blade, but when the blades of the fan blade are fewer, the fan blade does little work, the air outlet volume can be influenced, and when the distance between the blades of the fan blade is large, airflow between the blades can generate vortex, and the vortex can bring noise.
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 vortex flows can occur among the mixed flow fan blades of the mixed flow fan blade in the prior art.
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 mixed flow blades are arranged on the peripheral surface of the hub; the rectifying blades are arranged on the outer peripheral surface of the hub, the rectifying blades and the mixed flow blades are arranged at intervals, the length of the rectifying blades in the axial extension direction of the hub is smaller than that of the mixed flow blades, and one ends of the rectifying blades extend to the end part of the hub so as to rectify air flow at the mixed flow blades through the rectifying blades.
Further, the hub is of a cone frustum structure, the first ends of the rectifying blades extend to the large-diameter end of the hub, and the second ends of the rectifying blades are located between the large-diameter end of the hub and the small-diameter end of the hub so as to rectify the airflow at the first end of the hub through the rectifying blades.
Further, the mixed flow blades are multiple, the rectifying blades are multiple, the mixed flow blades are arranged on the hub at intervals, and the rectifying blades are arranged between any two adjacent mixed flow blades so as to rectify air flow between the two adjacent mixed flow blades through the rectifying blades.
Furthermore, the rectifying blade and the mixed flow blade are arranged in parallel, and the distance between the rectifying blade and one mixed flow blade of two adjacent mixed flow blades is b1The distance between the rectifying blade and the other mixed flow blade of the two adjacent mixed flow blades is b2Wherein b is1＝b2。
Further, the length of the mixed flow blade is h along the axial extension direction of the hub1The length of the rectifying blade is h2，0.25≤h2/h1≤0.75。
Further, the length of the mixed flow blade is h along the extension direction of the axis of the hub1The length of the rectifying blade is h2，h2/h10.25 or h2/h10.5 or h2/h1＝0.75。
Furthermore, the mixed flow blades are multiple, a guide gap is formed between every two adjacent mixed flow blades, and the guide gap is provided with a circumferential air outlet, so that at least part of air flow entering the guide gap flows out of the circumferential air outlet along the radial direction of the hub under the centrifugal action of the mixed flow blades.
Further, the first end of the rectifying blade extends to the large-diameter end of the hub, and the radius of the outer circumference circle of the large-diameter end of the hub is R1The width of the first end of the rectifying blade is b1Wherein b is1≥R1。
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 rectifying blade is additionally arranged on the hub, and one end of the rectifying blade extends to the end part of the hub, so that the rectifying blade can rectify the airflow at the mixed flow blade conveniently, the eddy phenomenon is reduced, and the noise caused by the eddy is further reduced. Therefore, the technical problem that vortex flow can occur among the mixed flow blades of the mixed flow fan blade 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 according to an embodiment of the present invention;
fig. 2 is a front view of a mixed flow fan blade according to an embodiment of the present invention;
fig. 3 shows a schematic structural diagram of a mixed flow fan blade according to a second embodiment of the present invention;
fig. 4 shows a front view of a mixed flow fan blade according to a second embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a mixed flow fan blade according to a third embodiment of the present invention; and
fig. 6 shows a front view of a mixed flow fan blade according to a third embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a hub; 11. a large diameter end; 20. a mixed flow blade; 30. and a rectifying blade.
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 6, an embodiment of the present invention provides a mixed flow fan blade, including: hub 10, mixed flow blades 20 and straightening blades 30. The mixed flow blades 20 are disposed on the outer circumferential surface of the hub 10, and the rectifying blades 30 are disposed on the outer circumferential surface of the hub 10. The rectifying blades 30 and the mixed flow blades 20 are arranged at intervals, the length of the rectifying blades 30 in the axial extension direction of the hub 10 is smaller than that of the mixed flow blades 20, and one ends of the rectifying blades 30 extend to the end of the hub 10 so as to rectify the airflow at the mixed flow blades 20 through the rectifying blades 30.
Adopt the mixed flow fan blade that this embodiment provided, through add the rectifier blade 30 on wheel hub 10 to make the one end of rectifier blade 30 extend to wheel hub 10's tip, the air current that the rectifier blade 30 located 20 mixed flow blades of being convenient for like this rectifies, has increased the work load, has improved the air-out amount of wind, has reduced the appearance of vortex phenomenon, and then has reduced the noise that the vortex brought.
Specifically, the hub 10 in this embodiment has a truncated cone structure, the first end of the rectifying blade 30 extends to the large diameter end 11 of the hub 10, and the second end of the rectifying blade 30 is located between the large diameter end 11 of the hub 10 and the small diameter end of the hub 10, so as to rectify the airflow at the first end of the hub 10 through the rectifying blade 30. With such an arrangement, noise reduction at the first end can be better achieved.
In order to better reduce the generation of the vortex phenomenon, the mixed flow blade 20 in the embodiment is multiple, the rectifying blade 30 is multiple, the multiple mixed flow blades 20 are arranged on the hub 10 at intervals, and the rectifying blade 30 is arranged between any two adjacent mixed flow blades 20, so that the air flow between two adjacent mixed flow blades 20 is rectified by the rectifying blade 30.
Specifically, the flow straightening vane 30 and the mixed flow vane 20 may be arranged in parallel, and the distance between the flow straightening vane 30 and one mixed flow vane 20 of two adjacent mixed flow vanes 20 is b1The distance between the rectifying blade 30 and the other mixed flow blade 20 of the two adjacent mixed flow blades 20 is b2Wherein b is1＝b2。
Specifically, the length of the mixed flow blade 20 is h along the axial extension direction of the hub 101The length of the flow straightening vanes 30 is h2，0.25≤h2/h1Less than or equal to 0.75. With the arrangement, the eddy current phenomenon between two adjacent mixed flow blades 20 can be better reduced by adjusting the ratio between the rectifying blade 30 and the mixed flow blade 20, and the noise generated by the eddy current can be better reduced.
In particular, the edgeThe axial extension direction of the hub 10 and the length of the mixed flow blade 20 are h1The length of the flow straightening vanes 30 is h2. In the mixed flow fan blade of the first embodiment, h is arranged2/h10.25, in the mixed-flow fan of example two, h2/h10.5, in the mixed-flow fan blade of example three, h2/h1＝0.75。
In the mixed flow blades in the first embodiment, the second embodiment and the third embodiment, the mixed flow blades 20 are multiple, and a guide gap is formed between two adjacent mixed flow blades 20. The guide gap is provided with a circumferential air outlet, so that at least part of the air flow entering the guide gap flows out of the circumferential air outlet along the radial direction of the hub 10 under the centrifugal action of the mixed flow blades 20. By adopting the arrangement, the centrifugal effect of the mixed flow fan blade can be improved through the circumferential air outlet.
Specifically, in the first, second and third embodiments, the first end of the straightening vane 30 extends to the large diameter end 11 of the hub 10, and 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 flow straightening vane 30 is b1Wherein b is1≥R1. By adopting the arrangement, the width of the first end of the rectifying blade 30 is increased, so that a negative pressure area can be conveniently formed at the position, close to the hub 10, of the rectifying blade 30, and further the centrifugal effect of the mixed flow fan blade is better improved.
In order to improve the centrifugal effect better, the structures of the positions of the straightening vanes 30 and the mixed flow vanes 20 in the first embodiment, the second embodiment and the third embodiment can be the same.
Specifically, in the first, second and third embodiments, the radius of the outer circumference circle of the large diameter end 11 of the hub 10 is R1The width of the first end of the mixed flow blade 20 is b2Wherein b is2≥R1. By adopting the arrangement, the width of the first end of the mixed flow blade 20 is increased, so that a negative pressure area can be conveniently formed at the position, close to the hub 10, of the mixed flow blade 20, and the centrifugal effect of the mixed flow fan blade can be better improved.
Specifically, the width of the first end of the mixed flow blade 20 in this embodiment is b2The width of the second end of the mixed flow blade 20 is b3，b3＞b2. By adopting the arrangement, the mixed flow effect can be better achieved. Specifically, the width of the first end of the mixed flow blade 20 may be equal to or similar to the width of the second end of the mixed flow blade 20.
In the present embodiment, the wind outlet angle at the first end of the mixed flow blade 20 is θ1The outlet angle at the second end of the mixed flow 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 mixed flow blade 20 refers to an included angle between a tangent line at the first end of the mixed flow blade 20 and the axis of the hub 10, and the air outlet angle at the second end of the mixed flow blade 20 refers to an included angle between a tangent line at the second end of the mixed flow blade 20 and the axis of the hub 10. By adopting the arrangement, the arc-shaped inclination angle of the mixed flow blade 20 is small, so that the centrifugal effect when the mixed flow blade works is better realized, and the mixed flow 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 mixed flow 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 mixed flow blade 20 is a plane, so that the end surface of the first end of the mixed flow blade 20 is flush with the end surface of the large diameter end 11 of the hub 10. With the adoption of the arrangement, the air flow can be better guided through the mixed flow blades 20, so that the centrifugal effect is better improved.
Specifically, the end surface of the first end of the mixed flow blade 20 is a plane, so that the end surface of the first end of the mixed flow blade 20 is inclined toward the direction close to the second end of the mixed flow blade 20.
Specifically, the angle between the end surface of the first end of the mixed flow 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 speaking, the cornerThe smaller the degree, the better, so as to facilitate better guiding of the air flow by the mixed flow vanes 20.
Specifically, the end surface of the second end of the mixed flow blade 20 is a plane, so that the end surface of the second end of the mixed flow blade 20 is flush with the end surface of the small diameter end of the hub 10. With this arrangement, the second end of the mixing blade 20 can guide the airflow.
Specifically, the end surface of the second end of the mixed flow blade 20 is a plane, so that the end surface where the second end of the mixed flow blade 20 is located is obliquely arranged in a direction away from the first end of the mixed flow blade 20.
Specifically, the angle between the end surface of the second end of the mixed flow blade 20 and the end surface of the small diameter end of the hub 10 is θ4Wherein 0 DEG < theta4Is less than or equal to 30 degrees. By adopting the arrangement, the second end of the mixed flow blade 20 can be conveniently actuated to the air flow, and meanwhile, the influence on the dynamic balance effect of the mixed flow blade can be avoided.
The fourth embodiment of the invention provides an air duct structure, which comprises an air duct shell and a mixed flow fan blade, wherein the mixed flow fan blade is arranged in the air duct shell, and the mixed flow fan blade is provided in the first embodiment or the second embodiment or the third embodiment.
The fifth embodiment of the invention provides an indoor unit of an air conditioner, which comprises an air duct structure.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the flow of being convenient for the rectifier blade to mixed flow blade department carries out the rectification, has increased the work load, has improved the air-out amount of wind, has reduced the appearance of vortex phenomenon, and then has reduced the noise that the vortex brought.
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 (10)
1. A mixed flow fan blade is characterized by comprising:
a hub (10);
mixed flow blades (20) arranged on the outer circumferential surface of the hub (10);
the flow straightening vane (30) is arranged on the outer peripheral surface of the hub (10), the flow straightening vane (30) and the mixed flow vane (20) are arranged at intervals, the length of the flow straightening vane (30) is smaller than that of the mixed flow vane (20) along the axial extension direction of the hub (10), and one end of the flow straightening vane (30) extends to the end part of the hub (10) so as to straighten the airflow at the mixed flow vane (20) through the flow straightening vane (30).
2. The mixed flow fan blade as claimed in claim 1, wherein the hub (10) is of a truncated cone structure, the first end of the straightening vane (30) extends to the large diameter end of the hub (10), and the second end of the straightening vane (30) is located between the large diameter end of the hub (10) and the small diameter end of the hub (10) to straighten the air flow at the first end of the hub (10) through the straightening vane (30).
3. The mixed flow fan blade of claim 1, characterized in that the mixed flow fan blade (20) is provided with a plurality of mixed flow blades (20), the rectifying blade (30) is provided with a plurality of mixed flow blades (20) arranged on the hub (10) at intervals, and the rectifying blade (30) is arranged between any two adjacent mixed flow blades (20) so as to rectify the air flow between the two adjacent mixed flow blades (20) through the rectifying blade (30).
4. The mixed flow fan blade according to claim 3, characterized in that the flow straightening blade (30) and the mixed flow blade (20) are arranged in parallel, and the distance between the flow straightening blade (30) and one mixed flow blade (20) of two adjacent mixed flow blades (20) is b1The distance between the rectifying blade (30) and the other mixed flow blade (20) of the two adjacent mixed flow blades (20) is b2Wherein b is1＝b2。
5. Mixed flow blade according to claim 1, characterized in that the length of the mixed flow blade (20) is h along the axial extension direction of the hub (10)1The length of the rectifying blade (30) is h2，0.25≤h2/h1≤0.75。
6. Mixed flow blade according to claim 1, characterized in that the length of the mixed flow blade (20) is h in the extension direction of the axis of the hub (10)1The length of the rectifying blade (30) is h2，h2/h10.25 or h2/h10.5 or h2/h1＝0.75。
7. The mixed flow fan blade of claim 5, characterized in that the mixed flow fan blade (20) is provided with a plurality of mixed flow blades, a guide gap is formed between two adjacent mixed flow blades (20), and the guide gap is provided with a circumferential air outlet, so that at least part of the air flow entering the guide gap flows out from the circumferential air outlet along the radial direction of the hub (10) under the centrifugal action of the mixed flow blades (20).
8. The mixed flow fan blade according to claim 1, wherein the first end of the straightening blade (30) extends to the large diameter end of the hub (10), and the radius of the outer circumference circle of the large diameter end of the hub (10) is R1The width of the first end of the rectifying blade is b1Wherein b is1≥R1。
9. 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 8.
10. An indoor unit of an air conditioner, characterized in that the indoor unit of an air conditioner comprises an air duct structure, and the air duct structure is the air duct structure defined in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910713903.7A CN112303003A (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 |
|---|---|---|---|
| CN201910713903.7A CN112303003A (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 |
|---|---|
| CN112303003A true CN112303003A (en) | 2021-02-02 |
Family
ID=74485579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910713903.7A Pending CN112303003A (en) | 2019-08-02 | 2019-08-02 | Mixed flow fan blade, air duct structure and air conditioner indoor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112303003A (en) |
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2019
- 2019-08-02 CN CN201910713903.7A patent/CN112303003A/en active Pending
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