CN209838764U - Blade, backward centrifugal fan blade with same and centrifugal fan - Google Patents
Blade, backward centrifugal fan blade with same and centrifugal fan Download PDFInfo
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- CN209838764U CN209838764U CN201920477174.5U CN201920477174U CN209838764U CN 209838764 U CN209838764 U CN 209838764U CN 201920477174 U CN201920477174 U CN 201920477174U CN 209838764 U CN209838764 U CN 209838764U
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Abstract
The utility model relates to an air conditioner accessory field. A blade comprising a blade body; the inner side end of the blade main body is an air inlet end, and the outer side end of the blade main body is an air outlet end; the edge of the air inlet end of the blade main body at least comprises a first linear segment, a second linear segment and a third linear segment which are sequentially connected from top to bottom, wherein the first linear segment is gradually downwards inclined and guided from outside to inside, the second linear segment is gradually downwards inclined and guided from inside to outside, and the third linear segment is gradually downwards inclined and guided from outside to inside; a first bulge is formed between the first linear section and the second linear section and is positioned at the upper part of the air inlet end of the blade main body. The molded lines on the air inlet side of the blades are irregularly connected by a plurality of line sections to form a plurality of irregular bulges, the irregular bulges enter the high-pressure air flow region in advance when the fan blades rotate, and the regions outside the bulges are delayed to enter the high-pressure air flow region. The whole structure disperses the pressure flow of the whole blade, so that the impact action of the vortex on the blade is weakened, and the running noise of the whole machine is reduced. This application still includes the centrifugation fan blade in back and centrifugal fan that has this blade.
Description
Technical Field
The utility model relates to an air conditioner accessory field especially relates to a blade to and have backward centrifugal fan blade and centrifugal fan of this blade.
Background
The centrifugal fan blade is widely applied to household appliances such as dehumidifiers, air purifiers, cabinet air conditioners, mobile air conditioners and the like. The blade type of the centrifugal fan blade has three different forms of forward direction, radial direction and backward direction. The blade installation angle of the backward centrifugal fan blade is smaller than 90 degrees, and the outlet direction of the blade is opposite to the rotation direction of the impeller. The backward centrifugal fan blade is generally used in the occasions with higher rotating speed, has high use efficiency and is usually higher in noise. Conventional backward centrifugal fan blade includes bottom plate, multi-disc blade and wind circle, and the multi-disc blade is fixed between bottom plate and wind circle, specifically is the integrative injection moulding of blade bottom and bottom plate, then the blade top is connected fixedly through the ultrasonic wave with the wind circle.
For example, a backward centrifugal fan blade described in the patent publication of Chinese utility model with publication number "CN 207777264U". As shown in the attached drawings of the patent text, the edge of an air inlet end and the edge of an air outlet end of each blade adopted by the backward centrifugal fan blade adopt vertical line segments, when the backward centrifugal fan blade with the structure operates, the edge of the air inlet end of each blade integrally enters a high-pressure air flow area, the pressure of the whole blade is concentrated, the impact effect of a vortex on the blades is strong, and the operation noise of the whole machine is large.
Disclosure of Invention
In order to solve the above problem, the utility model discloses a first aim at provides a blade, blade air inlet side molded lines are by the irregular connection of multi-thread section, constitute the irregular arch of a plurality of, and irregular evagination gets into high pressure air flow district in advance when the fan blade operation, and protruding tip is close more to the fan blade center, so its pivoted linear velocity is littleer, and corresponding wind pressure is also littleer, and regional hysteresis outside the arch gets into high pressure air flow district. The whole structure disperses the pressure flow of the whole blade, reduces the concentration of the vortex, weakens the impact action of the vortex on the blade and reduces the running noise of the whole machine. A second object of the present invention is to provide a backward centrifugal fan blade, which has the above-mentioned blades. A third object of the present invention is to provide a centrifugal fan, which has the above-mentioned backward centrifugal fan blade.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a blade comprising a blade body; the inner side end of the blade main body is an air inlet end, and the outer side end of the blade main body is an air outlet end; the method is characterized in that: the edge of the air inlet end of the blade main body at least comprises a first linear segment, a second linear segment and a third linear segment which are sequentially connected from top to bottom, wherein the first linear segment is gradually downwards inclined and guided from outside to inside, the second linear segment is gradually downwards inclined and guided from inside to outside, and the third linear segment is gradually downwards inclined and guided from outside to inside; a first bulge is formed between the first linear section and the second linear section and is positioned at the upper part of the air inlet end of the blade main body.
Preferably, the total height of the air inlet end of the blade body is H, the width of the protruding part of the first protrusion is L1, the height of the protruding part of the first protrusion is H1, L1 is (20% -45%) H, and H1 is (25% -50%) H.
Preferably, the lower part of the air inlet end of the blade main body is provided with a second bulge, and a notch is formed between the first bulge and the second bulge; the inner side wall of the notch between the first protrusion and the second protrusion forms a third linear segment; the edge of the second protrusion includes a fourth linear section gradually directed downward from outside to inside, and a fifth linear section gradually directed downward from inside to outside.
Preferably, the total height of the air inlet end of the blade main body is H, the width of the protruding part of the second protrusion is L2, and L2 is (10% -25%) H.
Preferably, the total height of the air inlet end of the blade main body is H, the height of the third linear segment between the first protrusion and the second protrusion is H2, and H2 is (25% -50%) H.
A backward centrifugal fan blade comprises a circular chassis, an outer ring and a plurality of blades; the center of the circular chassis forms a hub for connecting a transmission part, a plurality of blades are arranged circumferentially around the center along the outer edge of the circular chassis, and the bottoms of the blades are fixedly connected to the circular chassis; the outer ring is arranged around the plurality of blades, and the lower side wall of the outer ring is connected to the tops of the blades; an air inlet is formed inside the outer ring, and an air outlet is formed between two adjacent blades; the method is characterized in that: the blade is the blade of any one of the above.
A centrifugal fan comprises a volute and centrifugal blades arranged in the volute; the method is characterized in that: the centrifugal fan blade is as described above.
The above technical scheme is adopted in the utility model, this technical scheme relates to a blade to and have this blade to centrifugal fan blade and centrifugal fan. In the blade, the edge of an air inlet end of a blade main body at least comprises a first linear section, a second linear section and a third linear section which are sequentially connected from top to bottom, wherein the first linear section is gradually downwards inclined and guided from outside to inside, the second linear section is gradually downwards inclined and guided from inside to outside, and the third linear section is gradually downwards inclined and guided from outside to inside; a first bulge is formed between the first linear section and the second linear section and is positioned at the upper part of the air inlet end of the blade main body. The structure has the advantages that the molded lines on the air inlet side of the blades are irregularly connected by the multiple line sections to form a plurality of irregular bulges, the irregular bulges enter the high-pressure air flow area in advance when the blades rotate, the end parts of the bulges are closer to the centers of the blades, so the rotating linear speed is smaller, the corresponding air pressure is smaller, and the area outside the bulges lags behind and enters the high-pressure air flow area. The whole structure disperses the pressure flow of the whole blade, reduces the concentration of the vortex, weakens the impact action of the vortex on the blade and reduces the running noise of the whole machine.
Drawings
Fig. 1 is a schematic view of a blade structure according to embodiment 1.
Fig. 2 is a schematic view of a blade structure according to embodiment 2.
Fig. 3 is a schematic structural view of a backward centrifugal fan blade in embodiment 3.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1:
a blade 1, as shown in fig. 1, comprises a blade body. The inboard end of blade main part is air inlet end an, and the outside end is air-out end b. The edge of the air inlet end a of the blade main body at least comprises a first linear section 11, a second linear section 12 and a third linear section 13 which are sequentially connected from top to bottom, wherein the first linear section 11 is gradually downwards inclined and guided from outside to inside, the second linear section 12 is gradually downwards inclined and guided from inside to outside, and the third linear section 13 is gradually downwards inclined and guided from outside to inside. A first bulge 14 is formed between the first linear section 11 and the second linear section 12, and the first bulge 14 is positioned at the upper part of the air inlet end a of the blade main body. The total height of the air inlet end a of the blade body is H, the width of the protruding part of the first protrusion 14 is L1, the height of the protruding part of the first protrusion 14 is H1, L1 is (20% -45%) H, and H1 is (25% -50%) H.
Based on the above embodiment, a centrifugal fan blade with the total height H of the air inlet end a of the main body of the fan blade being 70mm is selected for testing, and the air volume obtained by the traditional scheme described in the patent document with the publication number of CN207777264U is 710m3The noise was 49.1dB, and the data measured using this embodiment are shown in Table 1:
| L1-h1 | air volume (m)3/h) | Noise (dB) |
| 35-35 | 718.6 | 48.9 |
| 35-40 | 717.5 | 48.7 |
| 35-45 | 718.3 | 48.6 |
| 40-35 | 717.8 | 48.3 |
| 40-40 | 717.5 | 48.2 |
| 40-45 | 717.6 | 48.6 |
Table 1: the vane 1h1-L1 data were selected from a table of performance impact on air flow and noise.
Example 2:
a blade 1 as shown in fig. 2 comprises a blade body. The inboard end of blade main part is air inlet end an, and the outside end is air-out end b. The edge of the air inlet end a of the blade main body at least comprises a first linear section 11, a second linear section 12 and a third linear section 13 which are sequentially connected from top to bottom, wherein the first linear section 11 is gradually downwards inclined and guided from outside to inside, the second linear section 12 is gradually downwards inclined and guided from inside to outside, and the third linear section 13 is gradually downwards inclined and guided from outside to inside. A first bulge 14 is formed between the first linear section 11 and the second linear section 12, and the first bulge 14 is positioned at the upper part of the air inlet end a of the blade main body. The total height of the air inlet end a of the blade body is H, the width of the protruding part of the first protrusion 14 is L1, the height of the protruding part of the first protrusion 14 is H1, L1 is (20% -45%) H, and H1 is (25% -50%) H.
The lower part of the air inlet end a of the blade main body is provided with a second bulge 15, and a notch 16 is formed between the first bulge 14 and the second bulge 15. The inner side wall of the recess 16 between the first projection 14 and the second projection 15 constitutes the third linear segment 13. The edge of the second protrusion 15 includes a fourth linear section 17, which is directed gradually downward from the outside to the inside, and a fifth linear section 18, which is directed gradually downward from the inside to the outside. The width of the protruding portion of the second protrusion 15 is L2, and L2 is (10% to 25%) H. The total height of the air inlet end a of the blade main body is H, the height of the third linear section 13 between the first protrusion 14 and the second protrusion 15 is H2, and H2 is (25% -50%) H.
Based on the above embodiment, a centrifugal fan blade with the total height H of the air inlet end a of the main body of the fan blade being 70mm is selected for testing, and the air volume obtained by the traditional scheme described in the patent document with the publication number of CN207777264U is 710m3The noise was 49.1dB, and the data measured using this embodiment are shown in Table 2:
| L1-h1-L2-h2 | air volume (m3/h) | Noise (dB) |
| 40-35-15-25 | 716.8 | 45.3 |
| 40-40-15-25 | 716.5 | 46.3 |
| 40-35-15-30 | 717.3 | 45.6 |
| 40-40-15-30 | 715.6 | 46.8 |
| 35-35-20-35 | 716.9 | 47.9 |
| 35-40-20-25 | 715.3 | 47.6 |
Table 2: the performance influence table of the blades 1h1-L1-h2-L2 on the air quantity and noise is selected.
Example 3:
as shown in fig. 3, the present embodiment relates to a backward centrifugal fan blade, which includes a circular chassis 2, an outer ring 3 and a plurality of blades 1. The central part of the circular chassis 2 forms a hub 4 for connecting a transmission part, a plurality of blades 1 are arranged around the periphery of the central part along the outer edge of the circular chassis 2, and the bottoms of the blades 1 are fixedly connected on the circular chassis 2. The outer ring 3 is arranged around the plurality of blades 1, and the lower side wall of the outer ring 3 is connected to the tops of the blades 1. An air inlet is formed inside the outer ring 3, and an air outlet is formed between every two adjacent blades 1. The blade 1 adopts the blade 1 of any one of embodiment 1 or embodiment 2; the scheme shown in the figure adopts the technical scheme in the embodiment 2.
Example 4:
the embodiment relates to a centrifugal fan, which comprises a volute and centrifugal fan blades arranged in the volute. The centrifugal fan blade is as described in embodiment 3.
For review:
the above embodiments 1 and 2 relate to a blade 1; embodiment 3 relates to a backward centrifugal fan blade with the blade 1; embodiment 4 relates to the centrifugal fan who has this backward centrifugal fan blade. In the blade 1, the edge of the air inlet end a of the blade main body at least comprises a first linear segment 11, a second linear segment 12 and a third linear segment 13 which are sequentially connected from top to bottom, wherein the first linear segment 11 is gradually downwards inclined and guided from outside to inside, the second linear segment 12 is gradually downwards inclined and guided from inside to outside, and the third linear segment 13 is gradually downwards inclined and guided from outside to inside. A first bulge 14 is formed between the first linear section 11 and the second linear section 12, and the first bulge 14 is positioned at the upper part of the air inlet end a of the blade main body. The structure has the advantages that the molded lines on the air inlet side of the blade 1 are irregularly connected by multiple lines to form a plurality of irregular outer bulges and depressions among the outer bulges, the irregular outer bulges enter the high-pressure air flow region in advance when the fan blade runs, the depressions are lagged to enter the high-pressure air flow region, the pressure flow of the whole blade 1 is dispersed, the vortex aggregation is reduced, the impact effect of the vortex on the blade 1 is weakened, and the running noise of the whole machine is reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (7)
1. A blade comprising a blade body; the inner side end of the blade main body is an air inlet end, and the outer side end of the blade main body is an air outlet end; the method is characterized in that: the edge of the air inlet end of the blade main body at least comprises a first linear segment, a second linear segment and a third linear segment which are sequentially connected from top to bottom, wherein the first linear segment is gradually downwards inclined and guided from outside to inside, the second linear segment is gradually downwards inclined and guided from inside to outside, and the third linear segment is gradually downwards inclined and guided from outside to inside; a first bulge is formed between the first linear section and the second linear section and is positioned at the upper part of the air inlet end of the blade main body.
2. A blade according to claim 1, wherein: the total height of the air inlet end of the blade main body is H, the width of the protruding part of the first protrusion is L1, the height of the protruding part of the first protrusion is H1, L1 is (20% -45%) H, and H1 is (25% -50%) H.
3. A blade according to claim 1 or 2, characterized in that: a second bulge is arranged at the lower part of the air inlet end of the blade main body, and a notch is formed between the first bulge and the second bulge; the inner side wall of the notch between the first protrusion and the second protrusion forms a third linear segment; the edge of the second protrusion includes a fourth linear section gradually directed downward from outside to inside, and a fifth linear section gradually directed downward from inside to outside.
4. A blade according to claim 3, wherein: the total height of the air inlet end of the blade main body is H, the width of the protruding part of the second protrusion is L2, and L2 is (10% -25%) H.
5. A blade according to claim 3, wherein: the total height of the air inlet end of the blade main body is H, the height of a third linear segment between the first protrusion and the second protrusion is H2, and H2 is (25% -50%) H.
6. A backward centrifugal fan blade comprises a circular chassis, an outer ring and a plurality of blades; the center of the circular chassis forms a hub for connecting a transmission part, a plurality of blades are arranged circumferentially around the center along the outer edge of the circular chassis, and the bottoms of the blades are fixedly connected to the circular chassis; the outer ring is arranged around the plurality of blades, and the lower side wall of the outer ring is connected to the tops of the blades; an air inlet is formed inside the outer ring, and an air outlet is formed between two adjacent blades; the method is characterized in that: the blade is the blade of any one of claims 1 to 4.
7. A centrifugal fan comprises a volute and centrifugal blades arranged in the volute; the method is characterized in that: the centrifugal fan blade as claimed in claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920477174.5U CN209838764U (en) | 2019-04-10 | 2019-04-10 | Blade, backward centrifugal fan blade with same and centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920477174.5U CN209838764U (en) | 2019-04-10 | 2019-04-10 | Blade, backward centrifugal fan blade with same and centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209838764U true CN209838764U (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920477174.5U Active CN209838764U (en) | 2019-04-10 | 2019-04-10 | Blade, backward centrifugal fan blade with same and centrifugal fan |
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| Country | Link |
|---|---|
| CN (1) | CN209838764U (en) |
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2019
- 2019-04-10 CN CN201920477174.5U patent/CN209838764U/en active Active
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