CN203297147U - Improved cross-flow fan impeller - Google Patents
Improved cross-flow fan impeller Download PDFInfo
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- CN203297147U CN203297147U CN2013202443166U CN201320244316U CN203297147U CN 203297147 U CN203297147 U CN 203297147U CN 2013202443166 U CN2013202443166 U CN 2013202443166U CN 201320244316 U CN201320244316 U CN 201320244316U CN 203297147 U CN203297147 U CN 203297147U
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- impeller
- fan
- blade
- flow fan
- blades
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Abstract
The utility model discloses an improved cross-flow fan impeller, which comprises an impeller body and a plurality of blades arranged on the circumference of the impeller body at regular intervals. The blades are bent towards the rotation direction of the impeller body. The improved cross-flow fan impeller is characterized in that root chord lengths are bigger than top chord lengths of at least a part of the blades, and moreover, the included angle between the edge of the inner side of each blade and the axis of the impeller is beta, wherein beta is bigger than 0.5 degree and is less than 15 degrees. During the using process of the improved cross-flow fan impeller disclosed by the utility model, as the blades are widened, the power capability of a fan is effectively improved under equal power. Meanwhile, due to differences between top chord lengths and root chord lengths of the blades, differences are generated in an axial direction by an inner flow field of each section of the fan, and the frequency and the strength of rotation noise generated by the fact that a volute throat is impacted by the fan in the axial direction are changed, and therefore, the superposition of the rotation noise is prevented, and the rotation noise of the fan is reduced.
Description
Technical field
The utility model relates to field of air conditioning, particularly a kind of improved through-flow fan impeller.
Background technique
The application of axial-flow fan is very extensive, and wherein air-conditioning indoor hanging unit is with moving air flow and heat exchanger to carry out heat exchange action by through-flow fan impeller.Air quantity is larger, and heat transfer effect is just more obvious.Consider simultaneously the impact of room noise on the people, so consumers in general wish that axial-flow fan can reach the purpose that air quantity is large, noise is little.Yet existing axial-flow fan, because blade 2 ＇ on its impeller only have very little Draft (less than 0.3 degree) vertically, basically can ignore, the external side brim and the inner side edge that is to say blade 2 ＇ are substantially parallel with the impeller axis, so the two ends of blade 2 ＇ (top 3 ＇ and root 4 ＇) chord length equates, blade two ends leaf substantially the same, as Fig. 5-shown in Figure 6, the shortcoming of this through-flow fan impeller is: noise is also large when air quantity is large.This is because existing fan blade is leaf identical vertically, and during the fan rotation, the blade interior flow field is also identical in the axial direction, and the Rotation Noise that fan impacts the generation of snail tongue position is also identical, and the stack that this must cause Rotation Noise increases noise.So existing through-flow fan impeller is difficult to meet consumers in general's requirement.
Summary of the invention
The purpose of this utility model is for above-mentioned existing problems and deficiency, and a kind of acting ability that can improve fan is provided, and reduces simultaneously the improved through-flow fan impeller of the Rotation Noise of fan.
The technical solution of the utility model is achieved in that
Improved through-flow fan impeller described in the utility model, comprise that impeller body reaches a plurality of blades that are installed at regular intervals on described impeller body circumference with arranging, described blade is crooked towards the sense of rotation of described impeller body, is characterized in having at least in described blade the root chord length of a part of blade to be greater than its top chord length.
0.5 °＜the β of angle of the inside edge of above-mentioned blade and impeller axis＜15 ° wherein.Preferred version is 1 °＜β＜10 °.
The present invention is made as the structure of root chord length greater than its top chord length owing to adopting with at least one part blade on axial-flow fan, and the 0.5 °＜β of angle of the inside edge of above-mentioned blade and impeller axis＜15 °, thereby make the utility model in the process of using, because having, widens in blade, so under Same Efficieney, effectively improved the acting ability of fan; While is due to the difference of vane tip and root blade, make the every joint interior flow field of fan also produce in the axial direction difference, Rotation Noise frequency and the intensity of the generation of fan impact snail tongue all change in the axial direction, prevented the stack of Rotation Noise, thereby reduced the Rotation Noise of fan, effectively solved the problems such as the little and noise of existing through-flow fan impeller acting is large.That the present invention designs is ingenious, simple in structure, reliable, processing is simple and easy, can greatly improve again fan acting ability and reduce fan noise, can be widely used in field of air conditioning.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 is the cross-sectional structure schematic diagram of the impeller in the utility model.
Fig. 2 is the perspective view of a joint impeller in the utility model.
Fig. 3 is the perspective view of a blade in Fig. 2.
Fig. 4 is the left TV structure schematic diagram of Fig. 3.
Fig. 5 is the perspective view of prior art Leaf.
Fig. 6 is the left TV structure schematic diagram of Fig. 5.
Embodiment
As Figure 1-Figure 4, improved through-flow fan impeller described in the utility model, comprise that impeller body 1 reaches a plurality of blades 2 that are installed at regular intervals on described impeller body 1 circumference with arranging, described blade 2 is crooked towards the sense of rotation of described impeller body 1, have at least the root 4 chord length h2 of a part of blade to be greater than its top 3 chord length h1, the 0.5 °＜β of angle of the inside edge of above-mentioned blade 2 and impeller axis＜15 ° in described blade 2.The β angle is larger, and the chord length at blade 2 two ends (being width) difference is just larger.the utility model is in the process of using, because having, widens in blade 2, so under Same Efficieney, effectively improved the acting ability of fan, while is due to the difference (being the leaf difference at blade two ends) of blade 2 tops 3 and root 4 chord lengths (width), make the every joint interior flow field of blast fan also produce in the axial direction difference, Rotation Noise frequency and the intensity of the generation of fan impact snail tongue all change in the axial direction, prevented the stack of Rotation Noise, so reduced the Rotation Noise of fan, the problems such as the little and noise of existing through-flow fan impeller acting is large have effectively been solved.In order further to improve the premium properties of impeller, the preferred version of the inside edge of above-mentioned blade 2 and impeller axis is 1 °＜β of angle＜10 °.Experiment shows that its preferred version is 3 ° of " " 8 ° of β.That the present invention designs is ingenious, simple in structure, reliable, processing is simple and easy, can greatly improve again fan acting ability and reduce fan noise, can be widely used in field of air conditioning.
Although the utility model is to describe with reference to specific embodiment, this description and not meaning that is construed as limiting the utility model.With reference to description of the present utility model, other of the disclosed embodiments change, and all can expect for those skilled in the art, and this variation should belong in affiliated claim limited range.
Claims (3)
1. improved through-flow fan impeller, comprise that impeller body (1) reaches a plurality of blades (2) that are installed at regular intervals on described impeller body (1) circumference with arranging, described blade (2) is crooked towards the sense of rotation of described impeller body (1), it is characterized in that having at least in described blade (2) root (4) the chord length h2 of a part of blade (2) to be greater than its top (3) chord length h1, and the 0.5 °＜β of angle of the inside edge of this blade (2) and impeller axis＜15 °.
2. improved through-flow fan impeller according to claim 1, is characterized in that the inside edge of above-mentioned blade (2) and the 1 °＜β of angle of impeller axis＜10 °.
3. improved through-flow fan impeller according to claim 2, is characterized in that the inside edge of above-mentioned blade (2) and 3 ° of " " 8 ° of β of angle of impeller axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202443166U CN203297147U (en) | 2013-05-08 | 2013-05-08 | Improved cross-flow fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202443166U CN203297147U (en) | 2013-05-08 | 2013-05-08 | Improved cross-flow fan impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297147U true CN203297147U (en) | 2013-11-20 |
Family
ID=49573157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202443166U Expired - Lifetime CN203297147U (en) | 2013-05-08 | 2013-05-08 | Improved cross-flow fan impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203297147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317101A (en) * | 2018-03-27 | 2018-07-24 | 广东顺威精密塑料股份有限公司 | A kind of tab construction of cross flow fan |
-
2013
- 2013-05-08 CN CN2013202443166U patent/CN203297147U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317101A (en) * | 2018-03-27 | 2018-07-24 | 广东顺威精密塑料股份有限公司 | A kind of tab construction of cross flow fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |