CN214998432U - Three-layer fan blade and air circulation fan - Google Patents

Abstract

The utility model provides a pair of three-layer flabellum and air cycle fan, three-layer flabellum include the leaf axle, set up in leaf axle periphery and coaxial interior ring frame, set up in interior ring frame periphery and coaxial outer ring frame, set up first layer blading between leaf axle and interior ring frame, set up in second layer blading between interior ring frame and outer ring frame and set up in outer ring frame outlying third layer blading, the air-out tip of interior ring frame is higher than the air-out tip of outer ring frame. The blade shaft is assembled in the air circulation fan, and a slow wind channel is formed by a channel between the blade shaft and the inner ring frame; and a channel between the inner ring frame and the inner wall of the fan shell forms a fast air channel. The slow wind blown out from the slow wind channel can be focused forward in a more directional mode, interference loss of the fast wind blown out from the fast wind channel to the slow wind is reduced, and the wind type is complete. The forward directivity of the wind flow direction is effectively ensured, the wind flow can be kept concentrated and uniform at the position of blowing 1m, and the wind blown by the circulating fan can penetrate farther.

Description

Three-layer fan blade and air circulation fan

Technical Field

The utility model relates to a fan field, concretely relates to air cycle fan field, it is specific again, relate to a three-layer flabellum and air cycle fan that has this three-layer flabellum.

Background

The fan blade of traditional fan has only one deck, drives the flabellum rotation at motor start and produces the negative pressure, inhales the air outside the fan, see out wind behind the flabellum, and the air resistance that arouses when the flabellum of this structure sends out is big, and wind-force directly spreads after seeing out, therefore causes the distance of blowing not very far, and wind-force also is because of the collision of fast wind and slow wind, produces and blows not softly moreover. Therefore, many consumers begin to choose the air circulation fan to meet the requirements of long air blowing distance and soft air blowing.

The air circulation fan products in the current workshops still adopt single-layer fan blades, and manufacturers want to solve the two requirements by means of a cylindrical air duct of a circulation fan body. However, the basic disadvantages of the single-layer fan blade are reinforced by the air duct, and although the blowing distance is slightly improved, the above-mentioned collision problem of the fast wind and the slow wind causes too much noise, the directivity after the wind blows out is insufficient to generate turbulence, and further, the wind extrudes each other in the air duct to cause the shaking of the machine body, and the experience of consumers is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model discloses an effectively solve above-mentioned problem, provide a three-layer flabellum and have the air cycle fan of this three-layer flabellum.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

a three-layer fan blade comprises a blade shaft, an inner ring frame, an outer ring frame, a first layer of blade group, a second layer of blade group and a third layer of blade group, wherein the inner ring frame is arranged on the periphery of the blade shaft and is coaxial, the outer ring frame is arranged on the periphery of the inner ring frame and is coaxial, the first layer of blade group is arranged between the blade shaft and the inner ring frame, the second layer of blade group is arranged between the inner ring frame and the outer ring frame, and the third layer of blade group is arranged on the periphery of the outer ring frame; the air outlet end of the inner ring frame is higher than the air outlet end of the outer ring frame.

Further, the distance from the air outlet end of the inner ring frame to the air outlet end of the outer ring frame is not greater than 1/3 of the overall height of the inner ring frame.

Furthermore, the air inlet end part of the inner ring frame is concave at the air inlet end part of the outer ring frame, and the air inlet end part of the vane shaft is concave at the air inlet end part of the inner ring frame.

Furthermore, the tail ends of the blades of the second layer of blade group protrude out of the air inlet end part of the inner ring frame.

Furthermore, the tail ends of the blades of the third layer of blade group protrude out of the air inlet end part of the outer ring frame.

Furthermore, the blades of the first layer of blade group and the blades of the second layer of blade group are arranged in a staggered manner; the blades of the second layer of blade group and the blades of the third layer of blade group are arranged in a staggered mode.

Further, a connecting line between the air inlet end and the air outlet end is defined as an axis, and the included angle between the blades of the second layer of blade group and the axis is 55-60 degrees; the included angle between the blades of the third layer of blade group and the axis is 60-65 degrees.

Further, the included angle between the blades of the first layer of blade group and the axis is 50-55 degrees.

An air circulation fan comprises a fan shell, a driving motor and the three layers of fan blades; the fan shell is provided with an air inlet opening, an air outlet opening and an installation cavity communicated with the air inlet opening and the air outlet opening; the driving motor is fixed in the mounting cavity of the fan shell, the three layers of fan blades are assembled in the mounting cavity of the fan shell, and blade shafts of the three layers of fan blades are connected with a rotating shaft of the driving motor; a passage of the first layer of blade group is arranged between the blade shaft of the three layers of fan blades and the inner ring frame to form a slow wind passage; and a channel of the second layer of blade group and a channel of the third layer of blade group are arranged between the inner ring frame of the three layers of fan blades and the inner wall of the fan shell to form a fast air channel.

Through the utility model provides a technical scheme has following beneficial effect:

the structure of three layers of fan blades is adopted, and the air outlet end part of the inner ring frame is higher than the air outlet end part of the outer ring frame; the slow wind blown out from the slow wind channel can be focused forward in a more directional manner, so that the interference loss of the fast wind blown out from the fast wind channel to the slow wind is reduced, and the wind type is complete. In the process, the slow wind blown out from the slow wind channel and the fast wind blown out from the fast wind channel converge, the forward directivity of the wind flow direction is effectively ensured, the concentration and the uniformity of the wind flow can be still kept at the position of blowing out 1m, the wind blown out from the circulating fan can penetrate farther, and the design target of the air circulating fan can be better met. Meanwhile, in the fan shell of the air circulation fan, the slow air channel and the fast air channel are isolated from each other, the respective flowing speeds are uniform, the noise generated when air flows is effectively reduced, the vibration of the whole fan can be avoided, and the experience of a user is greatly enhanced.

Drawings

FIG. 1 is a schematic view of three layers of fan blades according to an embodiment;

FIG. 2 is a schematic view of an embodiment of three layers of fan blades at another angle;

FIG. 3 is a top view of an embodiment of three layers of fan blades;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 3;

FIG. 7 is a schematic external view of an air circulation fan according to an embodiment;

FIG. 8 is an exploded view of an air circulation fan according to an embodiment;

FIG. 9 is a view showing a simulation of an air flow of the air circulation fan in the range of 1m in the embodiment;

fig. 10 is a schematic diagram showing the air circulation fan of the present embodiment in comparison with the air circulation fan of the prior art.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 6, a three-layer fan blade 100 provided in this embodiment includes a blade shaft 11, an inner ring frame 12 disposed on the periphery of the blade shaft 11 and coaxial with the blade shaft, an outer ring frame 13 disposed on the periphery of the inner ring frame 12 and coaxial with the blade shaft 12, a first layer of blade set 21 disposed between the blade shaft 11 and the inner ring frame 12, a second layer of blade set 22 disposed between the inner ring frame 12 and the outer ring frame 13, and a third layer of blade set 23 disposed on the periphery of the outer ring frame 13, that is, a plurality of blades (defined as first blades 211) in the first layer of blade set 21 are located between the blade shaft 11 and the inner ring frame 12 and connect the outer sidewall of the blade shaft 11 and the inner sidewall of the inner ring frame 12; a plurality of vanes (defined as second vanes 221) of the second layer of vane group 22 are located between the inner ring frame 12 and the outer ring frame 13 and connect the outer side wall of the inner ring frame 12 and the inner side wall of the outer ring frame 13; the plurality of blades (defined as the third blade 231) of the third blade group 23 are distributed on the periphery of the outer ring frame 13 and are connected to the outer side wall of the outer ring frame 13.

Defining the vane shaft 11, the inner ring frame 12 and the outer ring frame 13, as shown in fig. 4, the end facing the air inlet 101 is an air inlet end, and the end facing the air outlet 102 is an air outlet end; the air outlet end of the inner ring frame 12 is higher than the air outlet end of the outer ring frame 13.

With continued reference to fig. 7 to 8, the present embodiment further provides an air circulation fan, which includes a fan housing 31, a driving motor 32, and the three layers of fan blades 100; specifically, the fan housing 31 is a cylindrical structure having an air inlet opening (not shown), an air outlet opening (not shown), and a mounting cavity (not shown) communicating the air inlet opening and the air outlet opening; the driving motor 32 is fixed in the installation cavity of the fan housing 31, the three-layer fan blades 100 are assembled in the installation cavity of the fan housing 31, and the blade shafts 11 of the three-layer fan blades 100 are connected with the rotating shaft of the driving motor 32; a slow wind channel is formed by a channel with a first-layer blade group 21 between a blade shaft 11 and an inner ring frame 12 of the three-layer fan blade 100; the passage between the inner ring frame 12 of the three-layer fan blade 100 and the inner wall of the fan housing 31, which has the second-layer blade group 22 and the third-layer blade group 23, forms a fast air passage.

When the fan works, the driving motor 32 drives the three-layer fan blades 100 to rotate, and airflow flows in from the air inlet opening of the fan shell 31 and finally flows out from the air outlet opening after passing through the slow air channel and the fast air channel respectively. Fig. 9 shows the effect diagram of the outflow air flow, in which the L section is the air flow within 1m blown by the air circulation fan, wherein the deeper part of the reference numeral 1 is the slow air flow, and the shallower part of the reference numeral 2 is the fast air flow. The air outlet end of the inner ring frame 12 is higher than the air outlet end of the outer ring frame 13; the slow wind (namely the mark 1) blown out from the slow wind channel can be focused forward more directionally, the interference loss of the fast wind (namely the mark 2) blown out from the fast wind channel to the slow wind is reduced, the wind type is complete, and the air current disorder caused by the too early convergence of the slow wind and the fast wind is avoided. And then, the slow wind blown out from the slow wind channel and the fast wind blown out from the fast wind channel converge, so that the forward directivity of the wind flow direction is effectively ensured, the concentration and the uniformity of the wind flow can be still kept at the position of blowing out 1m, the wind blown out from the circulating fan can penetrate farther, and the design target of the air circulating fan can be better met.

In the fan shell 31 of the air circulation fan, the slow air channel and the fast air channel are isolated from each other, the respective flow speeds are uniform, the noise generated when air flows is effectively reduced, the vibration of the whole fan can be avoided, and the experience of a user is greatly enhanced.

Practice proves that the air outlet of the air circulation fan is vertically upward, so that air flow is vertically upward blown out, the blown air flow can support the balloon at the position above the air outlet to be kept in a certain range, the balloon cannot float laterally, and the balloon is supported by uniform and stable air flow.

More specifically, in the air circulation fan, the air outlet opening of the fan housing 31 is covered with the air outlet cover 33, and the air inlet opening of the fan housing 31 is covered with the air inlet cover 34, so that a good isolation and protection effect is achieved.

Preferably, in this embodiment, the distance h between the air outlet end of the inner ring frame 12 and the air outlet end of the outer ring frame 13 is not greater than 1/3, which is the entire height of the inner ring frame 12, so that the wind field can be better maintained. Of course, in other embodiments, the distance h that the air outlet end of the inner ring frame 12 is higher than the air outlet end of the outer ring frame 13 may also be greater than 1/3 of the overall height of the inner ring frame 12.

Further, in this embodiment, the air inlet end of the inner ring frame 12 is recessed in the air inlet end of the outer ring frame 13, and the air inlet end of the vane shaft 11 is recessed in the air inlet end of the inner ring frame 12. At the air inlet end, the outer ring frame 13, the inner ring frame 12 and the blade shaft 11 are in a stepped concave shape, the function of the air inlet end is to reduce the loss of sucked air, the air can be better led into an air duct and then sent out, and therefore sufficient and continuous air flow output is achieved; the completeness and the continuity of the slow wind are ensured, and the driving motor 32 in the central position is effectively cooled. Meanwhile, in the three-layer fan blades 100 of the air circulation fan, the protruding design of the inner ring frame 12 at the air outlet (that is, the air outlet end of the inner ring frame 12 is higher than the air outlet end of the outer ring frame 13) is combined with the outer ring frame 13 at the air inlet, the inner ring frame 12 and the blade shaft 11 to form a stepped concave structure, so that the airflow blown out by the air circulation fan can be pushed forward by more than 15 meters in a static environment without airflow; its additional effect is better.

Of course, in other embodiments, the air inlet ends of the outer ring frame 13, the inner ring frame 12 and the vane shaft 11 may be flush, but the effect achieved is inferior compared to the stepped concave structure.

Further, in this embodiment, the tip 2211 of the blade (i.e. the second blade 221) of the second layer of blade group 22 protrudes from the air inlet end of the inner ring frame 12 (as shown in fig. 5); meanwhile, the end 2311 of the blade (i.e., the third blade 231) of the third layer of blade group 23 protrudes out of the air inlet end of the outer ring frame 13 (as shown in fig. 4 to 6). Namely, the blades of the second layer of blade group 22 and the blades of the third layer of blade group 23 are both designed to be extended, and the outward extension of the blades is used for increasing negative pressure, so that sucked air is introduced into the fast air channel to a greater extent, and the airflow of the fast air channel is more sufficient. Of course, in other embodiments, the end 2211 of the second blade 221 of the second blade group 22 may protrude from the air inlet end of the inner ring frame 12, or the end 2311 of the third blade 231 of the third blade group 23 may protrude from the air inlet end of the outer ring frame 13; thereby realizing the function of strengthening the air quantity of the fast air channel; or the blades of the second layer of blade group 22 and the blades of the third layer of blade group 23 are not designed to be protruded.

Further, in this embodiment, the blades of the first layer of blade group 21 and the blades of the second layer of blade group 22 are arranged in a staggered manner; the blades of the second layer of blade group 22 and the blades of the third layer of blade group 23 are arranged in a staggered manner. As in the outward radial direction, the blades of the second layer of blade set 22 cover the gap between two adjacent blades in the first layer of blade set 21, and the blades of the first layer of blade set 21 also cover the gap between two adjacent blades in the second layer of blade set 22. Similarly, the blades of the third layer of blade group 23 cover the gap between two adjacent blades in the second layer of blade group 22, and the blades of the second layer of blade group 22 also cover the gap between two adjacent blades in the third layer of blade group 23. Therefore, the blades are uniformly distributed, and the wind speed is more uniform. Of course, in other embodiments, the blade layout of the three sets of blade sets is not limited thereto.

More preferably, in this embodiment, a connection line between the air inlet end and the air outlet end is defined as an axis I, an included angle a between the blades of the first layer of blade group 21 and the axis I is 50 ° to 55 °, specifically 51.5 °, and a continuous and slow airflow can be output well. The included angle b between the blades of the second layer of blade group 22 and the axis I is 55-60 degrees, and is 58 degrees in the specific embodiment; the angle c between the blades of the third layer of blade sets 23 and the axis I is 60-65 °, in this particular embodiment 64 °. In the fast wind channel, the wind speed blown out by the second layer of blade group 22 is lower than the wind blown out by the third layer of blade group 23, that is, the medium speed wind blown out by the second layer of blade group 22 is the most main force for driving the airflow to push forward, and the high speed wind blown out by the third layer of blade group 23 is the high speed wind which can introduce larger airflow through the high speed wind blown out by the third layer of blade group 23; the airflow output by the fast air channel is more sufficient, and the propelling force is larger. Of course, in other embodiments, the inclination angles of the three layers of blades are not limited thereto.

Compared with the single-layer fan blade adopted in the prior art, the air circulation fan provided by the scheme has the advantages that in the circulation fan performance test data (230V/50Hz) shown in the table 1, the air circulation fan is obtained by testing the position of the air outlet at a distance of 1M (meter), the rotating speed of the prior art is equivalent to that of the scheme under different gears, the wind speed can be effectively enhanced, and the noise is obviously reduced compared with the prior art.

TABLE 1 circulating fan Performance test data (230V/50Hz)

Referring again to fig. 10, the wind speed is also generally greater than that of the air circulation fan of the prior art at different push distances, and after approximately 10m (meters) of the position, the reduction rate of the wind speed of the air circulation fan provided by the present solution is significantly slower, enabling pushing of further distances.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. A three-layer fan blade, comprising: the blade assembly comprises a blade shaft, an inner ring frame, an outer ring frame, a first layer of blade group, a second layer of blade group and a third layer of blade group, wherein the inner ring frame is arranged on the periphery of the blade shaft and is coaxial, the outer ring frame is arranged on the periphery of the inner ring frame and is coaxial, the first layer of blade group is arranged between the blade shaft and the inner ring frame, the second layer of blade group is arranged between the inner ring frame and the outer ring frame, and the third layer of blade group is arranged on the periphery of the outer ring frame; the air outlet end of the inner ring frame is higher than the air outlet end of the outer ring frame.

2. The three layer fan blade of claim 1, wherein: the distance from the air outlet end part of the inner ring frame to the air outlet end part of the outer ring frame is not more than 1/3 of the whole height of the inner ring frame.

3. The three layer fan blade of claim 1, wherein: the air inlet end part of the inner ring frame is concave at the air inlet end part of the outer ring frame, and the air inlet end part of the blade shaft is concave at the air inlet end part of the inner ring frame.

4. The three layer fan blade of claim 1, wherein: the tail ends of the blades of the second layer of blade group protrude out of the air inlet end part of the inner ring frame.

5. The three layer fan blade of claim 4, wherein: the tail ends of the blades of the third layer of blade group protrude out of the air inlet end part of the outer ring frame.

6. The three layer fan blade of claim 1, wherein: defining a connecting line between the air inlet end and the air outlet end as an axis, wherein the included angle between the blades of the second layer of blade group and the axis is 55-60 degrees; the included angle between the blades of the third layer of blade group and the axis is 60-65 degrees.

7. The three-layer fan blade of claim 1 or 6, wherein: the included angle between the blades of the first layer of blade group and the axis is 50-55 degrees.

8. The three layer fan blade of claim 1, wherein: the blades of the first layer of blade group and the blades of the second layer of blade group are arranged in a staggered manner; the blades of the second layer of blade group and the blades of the third layer of blade group are arranged in a staggered mode.

9. An air circulation fan, characterized in that: comprising a fan housing, a drive motor and the three-layer fan blade of any of claims 1 to 8; the fan shell is provided with an air inlet opening, an air outlet opening and an installation cavity communicated with the air inlet opening and the air outlet opening; the driving motor is fixed in the mounting cavity of the fan shell, the three layers of fan blades are assembled in the mounting cavity of the fan shell, and blade shafts of the three layers of fan blades are connected with a rotating shaft of the driving motor; a passage of the first layer of blade group is arranged between the blade shaft of the three layers of fan blades and the inner ring frame to form a slow wind passage; and a channel of the second layer of blade group and a channel of the third layer of blade group are arranged between the inner ring frame of the three layers of fan blades and the inner wall of the fan shell to form a fast air channel.

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