CN210509716U - 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
- CN210509716U CN210509716U CN201921245666.8U CN201921245666U CN210509716U CN 210509716 U CN210509716 U CN 210509716U CN 201921245666 U CN201921245666 U CN 201921245666U CN 210509716 U CN210509716 U CN 210509716U
- Authority
- CN
- China
- Prior art keywords
- mixed flow
- fan blade
- hub
- flow
- blades
- 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.)
- Active
Links
Images
Abstract
The utility model provides a machine in mixed flow fan blade, wind channel structure and air conditioning, the mixed flow fan blade includes: a hub; the mixed flow blades are arranged on the peripheral surface of the hub along the circumferential direction of the hub, 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; 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 utility model, the technical problem that the vortex phenomenon appears between the mixed flow blade of the mixed flow fan blade among the prior art can be solved.
Description
Technical Field
The utility model relates to an air conditioning technology field particularly, relates to a machine in mixed flow fan blade, wind channel structure and air conditioning.
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.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a machine in mixed flow fan blade, wind channel structure and air conditioning to the technical problem who appears the vortex phenomenon between the mixed flow blade of the mixed flow fan blade among the solution prior art.
In order to achieve the above object, according to the utility model discloses an aspect provides a mixed flow fan blade, include: a hub; the mixed flow blades are arranged on the peripheral surface of the hub along the circumferential direction of the hub, 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; 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.
Furthermore, the hub is of a cone frustum structure, the first end of the mixed flow blade is connected with the large-diameter end of the hub, and the second end of the mixed flow blade is connected with the small-diameter end of the hub; the radius of the peripheral circle of the large-diameter end of the hub is R1The width of the first end of the mixed flow blade is b1Wherein b is1≥R1。
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。
According to the utility model discloses an on the other hand provides an air duct structure, include: the mixed flow fan blade is the mixed flow fan blade provided by the above; the air duct shell and the mixed flow fan blade are arranged in the air duct shell.
Furthermore, the air duct shell comprises a flow guide part and a fan blade accommodating part, the flow guide part and the fan blade accommodating part are connected, the fan blade accommodating part is used for accommodating the mixed flow fan blade, and the flow guide part is used for guiding the airflow of the mixed flow fan blade; the inner wall surface of the fan blade accommodating part is formed by rotating a line segment with a generatrix as a first arc line around a first rotation axis.
Furthermore, the fan blade holding part is provided with an opening end and a first connecting end which are arranged oppositely, the first connecting end is used for being connected with the flow guide part, and the distance between the first arc line and the first rotating axis is gradually reduced along the direction from the first connecting end to the opening end.
Furthermore, the flow guide part comprises a transition section and a necking section, one end of the transition section is connected with the fan blade accommodating part, the other end of the transition section is connected with the necking section, the flow area of the necking section is smaller than the cross sectional area of the first connecting end, so that a negative pressure area is formed in the necking section under the action of the mixed flow fan blade, and airflow flows into the fan blade accommodating part from the flow guide part under the action of the negative pressure area.
Furthermore, the necking section is a cylindrical barrel so as to form a negative pressure area in the cylindrical barrel under the action of the mixed flow fan blade.
Further, in the direction from the fan blade accommodating part to the flow guide part, the flow area of the transition section is gradually reduced.
Further, the inner wall surface of the flow guide part is formed by rotating a line segment with a generatrix as a second arc line around a second rotation axis, so that the airflow flows into the flow guide part from the fan blade accommodating part under the action of the flow guide part.
Furthermore, the guide part is provided with a guide end and a second connecting end which are arranged oppositely, the second connecting end is used for being connected with the fan blade accommodating part, and the distance between the second arc line and the second rotating axis is gradually reduced along the direction from the second connecting end to the guide end.
Further, the inner wall of the air duct shell is of a drum-shaped structure, so that air flow flows into the guide portion from the fan blade accommodating portion under the action of the drum-shaped structure.
According to the utility model discloses an on the other hand provides an air-conditioning indoor unit, and the air-conditioning indoor unit includes the wind channel structure, and the wind channel structure is the above-mentioned wind channel structure that provides.
Use the technical scheme of the utility model, can increase the air-out scope through increasing circumference air outlet, at least partial air current through making the water conservancy diversion clearance flows by circumference air outlet along wheel hub's radial under centrifugal action, can improve the centrifugal effect of mixed flow fan blade like this. Simultaneously, through addding the rectifier blade to make the one end of rectifier blade extend to the tip of wheel hub, the rectifier blade that can be convenient for like this rectifies the air current of mixed flow blade department, has reduced the appearance of vortex phenomenon, and then has reduced the noise that the vortex brought. Therefore, through the utility model provides a technical scheme can solve the technical problem that the vortex can appear between the mixed flow blade of the mixed flow fan blade among the prior art.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, 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 is a front view of a wind tunnel structure according to a second embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating an air duct structure according to a second embodiment of the present invention;
fig. 3 shows a front view of a wind tunnel structure according to a third embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a wind channel structure according to a third embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a mixed flow fan blade according to an embodiment of the present invention; and
fig. 6 shows a schematic structural diagram of a mixed flow fan blade with a straightening vane according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a mixed flow fan blade; 11. a hub; 12. a mixed flow blade; 13. a rectifying blade; 14. a circumferential air outlet; 20. an air duct housing; 21. a flow guide part; 211. a transition section; 212. a necking section; 22. fan blade holding portion.
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 accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to 6, the embodiment of the present invention provides a mixed flow fan blade 10, where the mixed flow fan blade 10 includes: a hub 11, a plurality of mixed flow blades 12 and a plurality of straightening blades 13. The mixed flow blades 12 are arranged on the outer circumferential surface of the hub 11 along the circumferential direction of the hub 11, a guide gap is formed between every two adjacent mixed flow blades 12, and the guide gap is provided with a circumferential air outlet 14, so that at least part of air flow entering the guide gap flows out from the circumferential air outlet 14 along the radial direction of the hub 11 under the centrifugal action of the mixed flow blades 12. The flow straightening blades 13 are arranged on the outer peripheral surface of the hub 11, the flow straightening blades 13 are arranged at intervals with the mixed flow blades 12, the length of the flow straightening blades 13 in the axial extension direction of the hub 11 is smaller than that of the mixed flow blades 12, and one ends of the flow straightening blades 13 extend to the end portion of the hub 11 so as to straighten the airflow at the mixed flow blades 12 through the flow straightening blades 13.
Adopt the mixed flow fan blade 10 that this embodiment provided, can increase the air-out scope through increasing circumference air outlet 14, flow out by circumference air outlet 14 along wheel hub 11's radial under centrifugal action through making at least partial air current in water conservancy diversion clearance, can improve the centrifugal effect of mixed flow fan blade 10 like this. Meanwhile, the rectifying blades 13 are additionally arranged, and one ends of the rectifying blades 13 extend to the end parts of the hub 11, so that the rectifying blades 13 can rectify the airflow at the mixed flow blades 12 conveniently, the eddy phenomenon is reduced, and the noise caused by the eddy is reduced. Therefore, the mixed flow fan blade 10 provided by the embodiment can solve the technical problem that a vortex flow occurs between the mixed flow fan blades 12 of the mixed flow fan blade 10 in the prior art.
Specifically, the hub 11 is of a truncated cone structure, a first end of the mixed flow blade 12 is connected with a large-diameter end of the hub 11, and a second end of the mixed flow blade 12 is connected with a small-diameter end of the hub 11; the radius of the outer circumference of the large diameter end of the hub 11 is R1The width of the first end of the mixed flow blade 12 is b1Wherein b is1≥R1. By adopting the arrangement, the width of the first end of the mixed flow blade 12 is increased, so that a negative pressure area can be formed at the position of the mixed flow blade 12 close to the hub 11, and the centrifugal effect of the mixed flow fan blade 10 can be improved better.
Specifically, the width of the first end of the mixed flow blade 12 in this embodiment is b1The width of the second end of the mixed flow blade 12 is b2，b2＞b1. By adopting the arrangement, the mixed flow effect can be better achieved. Specifically, the width of the first end of the mixed flow blade 12 may be equal to or similar to the width of the second end of the mixed flow blade 12.
In the present embodiment, the wind outlet angle at the first end of the mixed flow blade 12 is θ1The outlet air angle at the second end of the mixed flow blade 12 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 12 refers to an included angle between a tangent line at the first end of the mixed flow blade 12 and the axis of the hub 11, and the air outlet angle at the second end of the mixed flow blade 12The included angle between the tangent at the second end of the mixed flow blade 12 and the axis of the hub 11. By adopting the arrangement, the arc-shaped inclination angle of the mixed flow blade 12 is small, so that the centrifugal effect when the mixed flow fan blade 10 applies work is better realized, and the mixed flow blade 12 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 12 in the axial extension direction of the hub 11 is h, and the radius of the outer circumference of the large diameter end of the hub 11 is R1，h＞R1. With such an arrangement, the centrifugal effect can be improved more effectively.
Specifically, the end face of the first end of the mixed flow blade 12 is a plane, so that the end face of the first end of the mixed flow blade 12 is flush with the end face of the large-diameter end of the hub 11. With the adoption of the arrangement, the air flow can be better guided through the mixed flow blades 12, so that the centrifugal effect is better improved.
Specifically, the end surface of the first end of the mixed flow blade 12 is a plane, so that the end surface of the first end of the mixed flow blade 12 is inclined toward the direction close to the second end of the mixed flow blade 12.
Specifically, the angle between the end surface of the first end of the mixed flow blade 12 and the end surface of the large diameter end of the hub 11 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 mixing vanes 12.
Specifically, the end surface of the second end of the mixed flow blade 12 is a plane, so that the end surface of the second end of the mixed flow blade 12 is flush with the end surface of the small diameter end of the hub 11. With this arrangement, the second end of the mixing blade 12 can be easily guided to the air flow.
Specifically, the end surface of the second end of the mixed flow blade 12 is a plane, so that the end surface where the second end of the mixed flow blade 12 is located is obliquely arranged in the direction away from the first end of the mixed flow blade 12.
Specifically, the end face of the mixed flow blade 12 where the second end is located is smaller than the small diameter of the hub 11The angle between the end faces of the ends being theta4Wherein 0 DEG < theta4Is less than or equal to 30 degrees. By adopting the arrangement, the second end of the mixed flow blade 12 can be conveniently actuated to the air flow, and meanwhile, the influence on the dynamic balance effect of the mixed flow fan blade 10 can be avoided.
Further, the length of the mixed flow blade 12 is h along the axial extension direction of the hub 111The length of the straightening vane 13 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 12 can be better reduced by adjusting the ratio between the rectifying blade 13 and the mixed flow blades 12, and the noise generated by the eddy current is further better reduced.
In order to better reduce the generation of the vortex phenomenon, the mixed flow blade 12 in the embodiment is multiple, the rectifying blade 13 is multiple, the multiple mixed flow blades 12 are arranged on the hub 11 at intervals, and the rectifying blade 13 is arranged between any two adjacent mixed flow blades 12, so that the air flow between two adjacent mixed flow blades 12 is rectified through the rectifying blade 13.
The embodiment of the utility model provides a second provides an air duct structure, and this air duct structure includes mixed flow fan blade 10 and air duct casing 20, and mixed flow fan blade 10 is the mixed flow fan blade 10 that embodiment one provided, and mixed flow fan blade 10 sets up in air duct casing 20.
Specifically, the air duct housing 20 in this embodiment includes a flow guiding portion 21 and a wind blade accommodating portion 22, the flow guiding portion 21 is connected to the wind blade accommodating portion 22, the wind blade accommodating portion 22 is used for accommodating the mixed flow wind blade 10, and the flow guiding portion 21 is used for guiding the airflow of the mixed flow wind blade 10. The inner wall surface of the fan blade accommodating portion 22 is formed by rotating a line segment whose generatrix is a first arc line around a first rotation axis to better guide the airflow.
In this embodiment, the fan blade accommodating portion 22 has an opening end and a first connecting end, which are opposite to each other, the first connecting end is used for connecting with the flow guide portion 21, and a distance between the first arc line and the first rotation axis gradually decreases along a direction from the first connecting end to the opening end. With such an arrangement, the airflow can be better guided.
In the air duct structure in the second embodiment, the flow guiding portion 21 includes a transition section 211 and a throat section 212, one end of the transition section 211 is connected to the fan blade accommodating portion 22, the other end of the transition section 211 is connected to the throat section 212, and a flow area of the throat section 212 is smaller than a cross-sectional area of the first connection end, so that a negative pressure area is formed in the throat section 212 under the action of the mixed flow fan blade 10, and an air flow flows into the fan blade accommodating portion 22 from the flow guiding portion 21 under the action of the negative pressure area. With this arrangement, the pressure of the air supplied to the air guide portion 21 is increased by the provision of the throat section 212, and a low-pressure region is formed in the middle of the throat portion, thereby achieving the air supply effect from the air guide portion 21 to the blade accommodating portion 22.
Specifically, the necking section 212 in this embodiment is a cylindrical tube, so as to form a negative pressure region in the cylindrical tube under the action of the mixed flow fan blade 10. Specifically, the radius of the throat section 212 is an average value of the sum of the radius at the first end and the radius at the second end of the mixed flow fan blade 10.
In order to better guide the airflow, the flow area of the transition section 211 gradually decreases in the direction from the fan blade accommodating portion 22 to the flow guide portion 21.
The third embodiment of the utility model provides an air duct structure, the internal face of water conservancy diversion portion 21 in the third embodiment is formed around the rotation of second rotation axis for the line segment of second pitch arc by the generating line to make the air current flow by fan blade holding portion 22 inflow water conservancy diversion portion 21 under the effect of water conservancy diversion portion 21.
Specifically, the flow guide portion 21 in this embodiment has a flow guide end and a second connection end, which are oppositely arranged, the second connection end is used for being connected with the fan blade accommodating portion 22, and a distance between the second arc line and the second rotation axis gradually decreases along a direction from the second connection end to the flow guide end. With this arrangement, the airflow can be guided better so that the airflow flows from the fan blade accommodating portion 22 into the guide portion.
Specifically, the inner wall of the air duct housing 20 in this embodiment is a drum-shaped structure, so that the airflow flows from the fan blade accommodating portion 22 into the guide portion under the action of the drum-shaped structure. With this arrangement, the air flow will be blown along the inner wall of the drum-shaped structure.
The embodiment of the utility model provides a fourth provides an indoor set of air conditioning, and the indoor set of air conditioning includes the wind channel structure, and the wind channel structure that the wind channel structure provided for embodiment three.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the air flow at the mixed flow blade is rectified by the rectifying blade, the work capacity is increased, the air outlet volume is improved, the vortex phenomenon is reduced, the noise caused by vortex is reduced, and different air supply modes are increased, so that the air flow rectifying device is suitable for different use scenes.
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 (13)
1. A mixed flow fan blade is characterized by comprising:
a hub (11);
the mixed flow blades (12) are arranged on the outer peripheral surface of the hub (11) along the circumferential direction of the hub (11), a flow guide gap is formed between every two adjacent mixed flow blades (12), 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 out of the circumferential air outlet along the radial direction of the hub (11) under the centrifugal action of the mixed flow blades (12);
the rectifying blades (13) are arranged on the outer peripheral surface of the hub (11), the rectifying blades (13) and the mixed flow blades (12) are arranged at intervals, the length of the rectifying blades (13) is smaller than that of the mixed flow blades (12) along the axial extension direction of the hub (11), and one ends of the rectifying blades (13) extend to the end part of the hub (11) so as to rectify the airflow at the mixed flow blades (12) through the rectifying blades (13).
2. The mixed flow fan blade of claim 1, characterized in that the hub (11) is a truncated cone shaped junctionThe first end of the mixed flow blade (12) is connected with the large-diameter end of the hub (11), and the second end of the mixed flow blade (12) is connected with the small-diameter end of the hub (11); the radius of the outer circumference circle of the large-diameter end of the hub (11) is R1The width of the first end of the mixed flow blade (12) is b1Wherein b is1≥R1。
3. A mixed flow blade according to claim 1, wherein the length of the mixed flow blade (12) is h along the axial extension direction of the hub (11)1The length of the rectifying blade (13) is h2，0.25≤h2/h1≤0.75。
4. An air duct structure, comprising:
the mixed flow fan blade (10), the said mixed flow fan blade (10) is the mixed flow fan blade of any claim 1 to 3;
the mixed flow fan blade (10) is arranged in the air duct shell (20).
5. The air duct structure according to claim 4, wherein the air duct casing (20) includes a flow guide portion (21) and a fan blade accommodating portion (22), the flow guide portion (21) and the fan blade accommodating portion (22) are connected, the fan blade accommodating portion (22) is used for accommodating the mixed flow fan blade (10), and the flow guide portion (21) is used for guiding the airflow of the mixed flow fan blade (10); the inner wall surface of the fan blade accommodating part (22) is formed by rotating a line segment with a generatrix as a first arc line around a first rotation axis.
6. The air duct structure according to claim 5, wherein the fan blade accommodating portion (22) has an opening end and a first connecting end, the opening end and the first connecting end are opposite to each other, the first connecting end is used for being connected with the flow guide portion (21), and a distance between the first arc line and the first rotation axis is gradually reduced along a direction from the first connecting end to the opening end.
7. The air duct structure according to claim 6, wherein the flow guide portion (21) comprises a transition section (211) and a reducing section (212), one end of the transition section (211) is connected with the fan blade accommodating portion (22), the other end of the transition section (211) is connected with the reducing section (212), and a flow area of the reducing section (212) is smaller than a cross-sectional area of the first connecting end, so that a negative pressure area is formed in the reducing section (212) under the action of the mixed flow fan blade (10), and an air flow flows into the fan blade accommodating portion (22) from the flow guide portion (21) under the action of the negative pressure area.
8. The air duct structure according to claim 7, characterized in that the necking section (212) is a cylindrical barrel, so as to form a negative pressure area in the cylindrical barrel under the action of the mixed flow fan blade (10).
9. The air duct structure according to claim 7, wherein a flow area of the transition section (211) is gradually reduced from the fan blade accommodating portion (22) to the flow guide portion (21).
10. The air duct structure according to claim 5, wherein the inner wall surface of the flow guide portion (21) is formed by rotating a line segment with a generatrix as a second arc line around a second rotation axis, so that the air flow flows from the fan blade accommodating portion (22) into the flow guide portion (21) under the action of the flow guide portion (21).
11. The air duct structure according to claim 10, wherein the air guide portion (21) has a guide end and a second connection end, the guide end and the second connection end being opposite to each other, the second connection end being configured to be connected to the fan blade accommodating portion (22), and a distance between the second arc line and the second rotation axis gradually decreases in a direction from the second connection end to the guide end.
12. The air duct structure according to claim 5, wherein an inner wall of the air duct housing (20) is a drum-shaped structure, so that the air flow flows from the fan blade accommodating portion (22) to the guide portion under the action of the drum-shaped structure.
13. An indoor unit of an air conditioner, characterized in that the indoor unit of the air conditioner comprises a duct structure, and the duct structure is as claimed in any one of claims 4 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921245666.8U CN210509716U (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 |
|---|---|---|---|
| CN201921245666.8U CN210509716U (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 |
|---|---|
| CN210509716U true CN210509716U (en) | 2020-05-12 |
Family
ID=70587372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921245666.8U Active CN210509716U (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) | CN210509716U (en) |
-
2019
- 2019-08-02 CN CN201921245666.8U patent/CN210509716U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11506211B2 (en) | Counter-rotating fan | |
| CN101173676B (en) | Electric axial flow fan | |
| US20100189557A1 (en) | Impeller and fan | |
| CN104641121A (en) | Propeller fan and air conditioner equipped with same | |
| CN109611356B (en) | Backward centrifugal fan | |
| CN105008723A (en) | Propeller fan and air conditioner equipped with same | |
| CN111379746A (en) | Fan and hairdryer | |
| CN114922852A (en) | Mixed flow fan and ducted air conditioner | |
| CN210509716U (en) | Mixed flow fan blade, air duct structure and air conditioner indoor unit | |
| CN107906046A (en) | A kind of blast fan | |
| WO2023202327A1 (en) | Combined fan blade structure and air outlet device | |
| CN210509715U (en) | Mixed flow fan blade, air duct structure and air conditioner indoor unit | |
| CN210509717U (en) | Mixed flow fan blade, air duct structure and air conditioner indoor unit | |
| CN112303005A (en) | Mixed flow fan blade, air duct structure and air conditioner indoor unit | |
| CN112303003A (en) | Mixed flow fan blade, air duct structure and air conditioner indoor unit | |
| CN111425459A (en) | Axial flow fan with 0.5 hub ratio | |
| JPH07286598A (en) | Centrifugal fan provided with fluid deflector | |
| CN220017603U (en) | Fresh air module and air conditioner | |
| CN219415151U (en) | Air duct assembly and air conditioner | |
| CN112302995A (en) | Fan assembly and cabinet air conditioner with same | |
| CN110857790A (en) | Range hood with current collector | |
| WO2020024401A1 (en) | Oblique flow fan | |
| CN220505410U (en) | Fan and cleaning device applying same | |
| CN211924536U (en) | Volute structure and fan | |
| CN215979984U (en) | Centrifugal ventilator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |