CN212899118U

CN212899118U - Centrifugal fan blade, fan assembly and mobile air conditioner

Info

Publication number: CN212899118U
Application number: CN202020999564.1U
Authority: CN
Inventors: 邱明总; 吴顺宾; 萧雅云
Original assignee: Kaiping New Widetech Electric Co ltd
Current assignee: Kaiping New Widetech Electric Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2021-04-06
Anticipated expiration: 2030-06-03

Abstract

The utility model discloses a centrifugation fan blade, include: the hub is used for connecting the driving device; the blades are distributed along the circumferential direction of one end of the hub; the bulge is arranged at one end of the fan blade far away from the hub; the height of the convex parts is increased from inside to outside along the radial direction of the hub, and the guide ring of the volute is arranged in a space surrounded by the plurality of convex parts; by applying the centrifugal fan blade, the possibility of friction between the blade and the guide ring can be effectively reduced while secondary reflux is reduced; the utility model also provides a fan subassembly and mobile air conditioner.

Description

Centrifugal fan blade, fan assembly and mobile air conditioner

Technical Field

The utility model relates to an air conditioning equipment field, in particular to centrifugation fan blade, fan subassembly and mobile air conditioner.

Background

In the existing centrifugal fan, in order to ensure that the fan can stably rotate and avoid the fan from rubbing with the flow guide ring, a certain safety distance is kept between the centrifugal fan and the flow guide ring; however, when the distance is set to be too large, high-pressure airflow in the high-pressure area flows into the low-pressure area through the gap to cause secondary backflow, so that the performance of the fan is seriously reduced, abnormal blade vibration is easily caused, and the service life of the fan is influenced

Therefore, the prior art provides a centrifugal fan blade, wherein the tail end of the fan blade is provided with a bulge, the bulge of all the fan blades is wrapped by a flow guide ring, and secondary backflow is prevented through the combined action of the bulge and the flow guide ring; when the fan rotational speed is higher, the fan blade receives centrifugal effect's influence outward deformation easily for protruding and water conservancy diversion circle take place the friction, cause equipment to damage.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a centrifugal fan blade can effectively reduce the frictional possibility of blade and water conservancy diversion circle when reducing the secondary backward flow.

The utility model discloses a centrifugation fan blade, include: the hub is used for connecting the driving device; the blades are distributed along the circumferential direction of one end of the hub; the bulge is arranged at one end of the fan blade far away from the hub; the height of the convex parts is increased from inside to outside along the radial direction of the hub, and the guide ring of the volute is arranged in the space surrounded by the plurality of convex parts.

Furthermore, one side of the bulge part close to the flow guide ring is provided with a round angle.

Furthermore, the upper end and the lower end of one surface of the bulge part close to the flow guide ring are provided with round corners.

Furthermore, each of the two ends of the hub is circumferentially provided with a plurality of blades.

Furthermore, reinforcing ribs are arranged on the outer sides of the fan blades.

Furthermore, the strengthening rib is the ring shape, and the external diameter of strengthening rib is greater than the external diameter of wheel hub.

The utility model discloses fan subassembly of second aspect, include: the volute is provided with an air inlet and an air outlet, and a flow guide ring is arranged at the air inlet; the centrifugal fan blade is arranged in the volute, and the flow guide ring is arranged in a space surrounded by the plurality of convex parts; and the driving device is used for driving the centrifugal fan blade to rotate.

Furthermore, air inlets are formed in the two ends of the volute along the axial direction of the centrifugal fan blade, and a guide ring is arranged at each air inlet.

Further, the driving device comprises a motor arranged on the volute, the motor is connected with the hub through a driving shaft, and the driving shaft penetrates through the motor.

The utility model discloses the third aspect provides a mobile air conditioner contains above-mentioned fan subassembly.

When the centrifugal fan blade of the utility model is applied, the guide ring is positioned in the space enclosed by the plurality of the convex parts when the fan blade rotates, and when the rotating speed of the fan blade is higher, the outward deformation of the fan blade leads to the increase of the clearance between the convex parts and the guide ring, so that the convex parts are difficult to rub with the guide ring; because the bulge is difficult to rub with the guide ring, the distance between the guide ring and the bulge can be further reduced, and compared with the method that the bulge is wrapped by the guide ring in the prior art, the method can further reduce the backflow of the airflow from a high-pressure area to a low-pressure area, and effectively reduce the secondary backflow.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an isometric view of a fan assembly according to an embodiment of the present invention;

FIG. 2 is a top view of a fan assembly according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line D-D of FIG. 2;

fig. 4 is an axonometric view of a centrifugal blade according to an embodiment of the present invention;

FIG. 5 is an enlarged view taken at I in FIG. 3;

the above figures contain the following reference numerals.

Detailed Description

Reference will now be made in detail to the 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 functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1-5, a centrifugal fan blade 200 includes: a hub 210 for connection to a drive; a plurality of blades 220 distributed along a circumferential direction of one end of the hub 210; the boss 230 is arranged at one end of the fan blade far away from the hub 210; the height of the boss 230 increases from inside to outside in the radial direction of the hub 210, and the flow guiding ring 120 of the volute 100 is disposed in a space surrounded by the plurality of bosses 230.

By applying the centrifugal fan blade 200 of the embodiment, when the fan blade rotates, the flow guide ring 120 is located in a space surrounded by the plurality of protrusions 230, and when the fan blade rotates at a higher speed, the blades 220 deform outwards to increase a gap between the protrusions 230 and the flow guide ring 120, so that the protrusions 230 are difficult to rub against the flow guide ring 120; because the protruding portion 230 is hard to rub against the deflector 120, the distance between the deflector 120 and the protruding portion 230 can be further reduced, and compared with the prior art in which the periphery of the protruding portion 230 is wrapped by the deflector 120, the backflow of the airflow from the high-pressure area a2 to the low-pressure area a1 can be further reduced, and the secondary backflow is effectively reduced.

It should be noted that, in the present embodiment, one end of the hub 210 refers to one end in the axial direction of the hub 210; and from inside to outside in the radial direction of hub 210 refers to a direction extending from the axial center of hub 210 to the outside of hub 210 in the radial direction of hub 210.

As shown in fig. 3, when the gap between the guide ring 120 and the vane 220 is too large, the air flow easily flows from the high pressure region a2 into the low pressure region a1 along the gap between the guide ring 120 and the vane 220, and when the guide ring 120 is located in the space surrounded by the plurality of protrusions 230, the protrusions 230 should not rub against the guide ring 120 for the vane 220 to deform outward; in this case, the gap between the guide ring 120 and the vane 220 can be set to be small, thereby further enhancing the effect of preventing the air flow from flowing back from the high pressure region a2 to the low pressure region a 1.

As shown in fig. 3, in order to enhance the strength of the protruding portion 230 and reduce the stress concentration of the blade 220 during the rotation of the blade, a rounded corner is disposed on one surface of the protruding portion 230 close to the flow guiding ring 120.

Further, the upper and lower ends of one surface of the protruding portion 230 close to the deflector ring 120 are both provided with rounded corners; the upper and lower ends referred to herein refer to an end of the boss 230 close to the blade 220 and an end far from the blade 220.

Specifically, as shown in fig. 3, a plane where all the protrusions are located farthest from the hub 210 is a first plane, a plane where the inducer 120 is located closest to the hub 210 is a second plane, and the first plane is located at a greater distance from the hub 210 than the second plane, at this time, the airflow flowing back to the low-pressure area a1 from the high-pressure area a2 is curved by the protrusion 230 with the rounded corner and the inducer 120, so that the airflow backflow resistance is further increased, and the airflow backflow is reduced.

Referring to fig. 4, a plurality of blades 220 are circumferentially distributed on each of two sides of the hub 210, where the two ends of the hub 210 are referred to as two ends along the axial direction of the hub 210, as shown in fig. 4, the blades 220 are arranged on the two axial ends of the hub 210, the air intake of a single centrifugal fan 200 can be close to that of two single-sided common centrifugal fans 200, the structure compactness is greatly increased, and the air intake of the blade 220 close to one side of the motor 300 can be used for dissipating heat of the motor 300, so that the performance of the centrifugal fan is improved.

As shown in fig. 4, in order to reduce the deformation of the blade 220 caused by the high-speed rotation of the centrifugal fan blade 200, a reinforcing rib 240 may be disposed outside the fan blade, and the outward deformation of the blade 220 is prevented by the fixing function of the reinforcing rib 240.

Further, in order to search the unbalance degree caused by the high-speed rotation of the strengthening ribs 240 in the rotation process of the centrifugal fan blade 200; the reinforcing ribs 240 may be arranged in a circular ring shape, and the outer diameter of the reinforcing ribs 240 is larger than that of the hub 210; as shown in fig. 4, the reinforcing rib 240 is a circular ring hooped around the plurality of blades 220, when the centrifugal fan blade 200 rotates, the reinforcing rib 240 can hoop the plurality of blades 220 to prevent the blades 220 from deforming outwards, and meanwhile, the circular reinforcing rib 240 can bring less unbalance when rotating at a high speed.

This embodiment has also given a fan assembly, includes: the volute 100 is provided with an air inlet and an air outlet 110, and a flow guide ring 120 is arranged at the air inlet; the centrifugal fan blade 200 is arranged in the volute 100, and the guide ring 120 is arranged in a space surrounded by the plurality of protrusions 230; and the driving device is used for driving the centrifugal fan blade 200 to rotate.

As shown in fig. 5, a flow guiding ring 120 is disposed at the air inlet of the volute casing 100, and when the centrifugal fan blade 200 is assembled with the volute casing 100, the flow guiding ring 120 is disposed in a space surrounded by the plurality of protrusions 230; when the centrifugal fan blade 200 rotates at a high speed, the blade 220 deforms outwards under the centrifugal action and is hard to rub against the guide ring 120.

Optionally, when the blades 220 are distributed on both ends of the hub 210 of the centrifugal fan blade 200, air inlets may be formed at both ends of the volute 100 along the axial direction of the centrifugal fan blade 200, and a baffle ring 120 corresponding to the protruding portion 230 of the centrifugal fan blade 200 is disposed at each air inlet, so that the air intake of the fan assembly is greatly increased.

As shown in fig. 3, the driving device includes a motor 300 disposed on the scroll casing 100, the motor 300 is connected with the hub 210 by a driving shaft 310, and the driving shaft 310 is disposed through the motor 300; the driving shaft 310 penetrates through two ends of the motor 300, and two ends of the driving shaft 310 can be respectively provided with a fan blade to provide air flow for the indoor heat exchanger and the outdoor heat exchanger; on the premise of adopting the single motor 300 for driving, the air flow at the indoor heat exchanger and the outdoor heat exchanger can be simultaneously promoted, the cost of using a plurality of motors 300 is effectively reduced, and optionally, the centrifugal fan blade 200 can be selected at the two ends of the driving shaft 310 according to the requirements, or the existing centrifugal fan blade 200 or axial flow fan blade in the prior art can be selected, so that the use by users is convenient.

The third aspect of the embodiment also provides a mobile air conditioner, which comprises the fan assembly. The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A centrifugal fan blade, comprising:

a hub (210) for connection to a drive;

a plurality of blades (220) distributed along the circumferential direction of one end of the hub (210);

the boss (230) is arranged at one end, far away from the hub (210), of the fan blade;

the height of the protruding parts (230) is increased from inside to outside along the radial direction of the hub (210), and the guide ring (120) of the volute (100) is arranged in a space surrounded by the protruding parts (230).

2. The centrifugal fan blade according to claim 1, wherein a rounded corner is provided on a surface of the protrusion (230) close to the baffle ring (120).

3. The centrifugal fan blade according to claim 2, wherein the round corners are arranged at the upper end and the lower end of one surface of the bulge (230) close to the flow guide ring (120).

4. The centrifugal fan blade according to claim 1, wherein a plurality of blades (220) are circumferentially distributed at each of two ends of the hub (210).

5. The centrifugal fan blade according to claim 1 or 4, wherein a reinforcing rib (240) is arranged outside the fan blade.

6. The centrifugal fan blade according to claim 5, wherein the reinforcing rib (240) is annular, and the outer diameter of the reinforcing rib (240) is larger than the outer diameter of the hub (210).

7. A fan assembly, comprising:

the volute (100) is provided with an air inlet and an air outlet (110), and a flow guide ring (120) is arranged at the air inlet;

the centrifugal fan blade (200) of any one of claims 1 to 6, disposed in the volute (100), wherein the baffle ring (120) is disposed in a space surrounded by the plurality of protrusions (230);

and the driving device is used for driving the centrifugal fan blade (200) to rotate.

8. The fan assembly according to claim 7, wherein the volute (100) is provided with the air inlets at two ends along the axial direction of the centrifugal fan blade (200), and the flow guide ring (120) is provided at each air inlet.

9. The fan assembly of claim 7, wherein the drive means comprises a motor (300) disposed on the volute (100), the motor (300) being connected to the hub (210) by a drive shaft (310), the drive shaft (310) being disposed through the motor (300).

10. A mobile air conditioner characterised by comprising a fan assembly as claimed in any one of claims 7 to 9.