CN220415778U - Centrifugal fan blade, centrifugal fan and air conditioner - Google Patents

Abstract

The utility model provides a centrifugal fan blade, a centrifugal fan and an air conditioner, wherein the centrifugal fan blade comprises a She Lunjuan, a hub and a plurality of blades, the hub and the impeller ring are coaxially and alternately arranged, the plurality of blades are uniformly distributed along the circumferential direction of the hub, two ends of the blades along the axial direction of the hub are respectively a first end and a second end, the first end is connected with the impeller ring, and the second end is connected with the hub; the width of the first end is smaller than the width of the second end in the radial direction of the hub. The plurality of blades are evenly distributed along the circumference of the hub and She Lunjuan, and the blades act to disturb the intake air flow. The wind pressure of one side of the centrifugal fan blade close to the hub is larger, and the wind pressure of one side of the centrifugal fan blade close to the blade rim is smaller. The width of the first end of blade is less than the width of second end, and first end and impeller circle are connected, and the second end is connected with wheel hub for the great one end of area is in the great one side disturbance air current of wind pressure, and the less one end of area is in the less one side disturbance air current of wind pressure, makes the disturbance of air current more even, reduces the production of noise.

Description

Centrifugal fan blade, centrifugal fan and air conditioner

Technical Field

The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal fan blade, a centrifugal fan and an air conditioner.

Background

The centrifugal fan system is a machine which pressurizes the air flow from the axial air inlet and then radially discharges the air by means of the input mechanical energy, thereby improving the air pressure and discharging the air. Centrifugal fans are widely used for cooling and ventilation in air conditioning equipment and household electrical appliances. The main structure of the centrifugal fan system comprises fan blades, a volute, a motor and the like, wherein the fan blades are used as core components of the centrifugal fan and are driven to rotate by the motor, and mechanical energy of the motor is transmitted to gas when the fan blades rotate, so that the pressure of the gas is increased.

The centrifugal fan blade in the prior art is provided with a plurality of blades which are uniformly distributed on the hub of the centrifugal fan blade along the circumferential direction of the centrifugal fan blade, and the blades are arranged in parallel and level on the axial direction of the centrifugal fan blade far away from the air inlet end of the hub, namely the heights of the blades in the axial direction of the centrifugal fan blade are equal. And the projection of the blade in the radial direction is rectangular, namely the profile of the upper end and the lower end of the blade along the axial direction are equal.

In the process that the motor drives the centrifugal fan blade to drive the blade to rotate, the air inlet end of the blade carries out rotation disturbance on the axial air inlet flow of the volute, and the disturbance on the air flow is not uniform enough due to the fact that the air inlet ends of a plurality of blades of the existing centrifugal fan blade are arranged in parallel, so that rotation noise is generated. There is a need for a centrifugal fan that can solve the problem of noise generated by uneven intake flow.

Disclosure of Invention

The utility model provides a centrifugal fan, which aims to solve the problem that noise is generated due to uneven air inlet flow in the prior art.

In order to solve the above problems, according to one aspect of the present utility model, there is provided a centrifugal fan blade, including a She Lunjuan hub and a plurality of blades, wherein the hub and the impeller ring are coaxially and alternately arranged, the plurality of blades are uniformly distributed along a circumferential direction of the hub, two ends of the blades along an axial direction of the hub are respectively a first end and a second end, the first end is connected with the impeller ring, and the second end is connected with the hub; the width of the first end is smaller than the width of the second end in the radial direction of the hub.

Further, the width of the first end is H1, the width of the second end is H2, and H1 is more than or equal to 3H 2 and less than or equal to 4H1.

Further, the blades have an outer side surface facing away from the hub axis and an inner side surface facing toward the hub axis, both of which are cambered surfaces curved from the outer periphery of the hub toward the axis direction of the hub.

Further, the blade is in a flat plate shape, the molded line of the outer side face is an arc molded line or an elliptical molded line, and the molded line of the inner side face is an arc molded line or an elliptical molded line.

Further, in a section through the hub axis, the radius of the outer side is R1 and the radius of the inner side is R2, R1 < R2.

Further, on a section passing through the axis of the hub, a connecting line of the center of the outer side face and the center of the inner side face is parallel to the axis of the hub, the width of the second end is H2, and the distance between the center of the outer side face and the center of the inner side face is H3, wherein H3 is smaller than H2.

Further, in the axial direction of the hub, a distance between the first end and the second end is H4; on the section passing through the axis of the hub, the radius of the outer side surface is R1, H4-5mm is less than or equal to R1 and less than or equal to H4 plus 5mm.

Further, on a section passing through the hub axis, and in the axial direction of the hub, the distance between the center of the outer side surface and the first end is H5, and the distance between the first end and the second end is H4, where h4=2h5.

Further, the impeller ring is annular, she Lunjuan is an air inlet end of the centrifugal fan blade, and a part of the hub is located in an area formed by surrounding the plurality of blades.

According to another aspect of the utility model, a centrifugal fan is provided, comprising the centrifugal fan blade.

According to still another aspect of the present utility model, there is provided an air conditioner including the centrifugal fan described above.

By applying the technical scheme of the utility model, the centrifugal fan blade comprises a She Lunjuan, a hub and a plurality of blades, wherein the hub and the impeller ring are coaxially and alternately arranged, the blades are uniformly distributed along the circumferential direction of the hub, two ends of the blades along the axial direction of the hub are respectively a first end and a second end, the first end is connected with the impeller ring, and the second end is connected with the hub; the width of the first end is smaller than the width of the second end in the radial direction of the hub. By adopting the scheme, a plurality of blades are uniformly distributed along the circumference of the hub and She Lunjuan, and the blades play a role in disturbing the air inlet flow. The wind pressure of one side of the centrifugal fan blade close to the hub is larger, and the wind pressure of one side of the centrifugal fan blade close to the blade rim is smaller. The width of the first end of blade is less than the width of second end, and first end and impeller circle are connected, and the second end is connected with wheel hub for the great one end of area is in the great one side disturbance air current of wind pressure, and the less one end of area is in the less one side disturbance air current of wind pressure, makes the disturbance of air current more even, reduces the production of noise.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic structural diagram of a centrifugal fan blade according to an embodiment of the present utility model;

FIG. 2 shows a top view of the centrifugal fan blade of FIG. 1;

FIG. 3 shows a cross-sectional view at A-A in FIG. 2;

FIG. 4 shows a side view of the centrifugal fan blade of FIG. 1;

fig. 5 shows a schematic structural view of the blade of fig. 1.

Wherein the above figures include the following reference numerals:

1. she Lunjuan; 2. a hub; 3. a blade; 31. a first end; 32. a second end; 33. an outer side surface; 34. an inner side surface.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 5, an embodiment of the present utility model provides a centrifugal fan blade, which includes a She Lunjuan 1, a hub 2 and a plurality of blades 3, wherein the hubs 2 and She Lunjuan are coaxially and alternately arranged, the plurality of blades 3 are uniformly distributed along the circumferential direction of the hub 2, two ends of the blades 3 along the axial direction of the hub 2 are respectively a first end 31 and a second end 32, the first end 31 is connected with the impeller ring 1, and the second end 32 is connected with the hub 2; the width of the first end 31 is smaller than the width of the second end 32 in the radial direction of the hub 2.

By adopting the scheme, a plurality of blades 3 are uniformly distributed along the circumference of the hub 2 and the impeller ring 1, and the blades 3 play a role in disturbing the inlet air flow. The wind pressure of one side of the centrifugal fan blade close to the hub is larger, and the wind pressure of one side of the centrifugal fan blade close to the blade rim 1 is smaller. The width of the first end 31 of the blade 3 is smaller than that of the second end 32, the first end 31 is connected with the impeller ring 1, and the second end 32 is connected with the hub 2, so that the second end 32 with larger area can disturb the air flow on one side with larger wind pressure, the first end 31 with smaller area can disturb the air flow on one side with smaller wind pressure, the disturbance of the air flow is more uniform, and the noise is reduced.

As shown in FIG. 5, the first end 31 has a width H1, and the second end 32 has a width H2,3H 1. Ltoreq.H2.ltoreq.4H2.

So set up, the width of first end 31 is less than the width of second end 32 for the area of keeping out the wind of first end 31 is less than the area of keeping out the wind of second end 32, and first end 31 matches with the less one side of wind pressure, and second end 32 matches with the great one side of wind pressure, makes the wind current disturbance more even, is difficult for producing the noise.

As shown in fig. 1 to 5, the blade 3 has an outer side 33 facing away from the axis of the hub 2 and an inner side 34 facing toward the axis of the hub 2, both the outer side 33 and the inner side 34 being cambered surfaces curved from the outer periphery of the hub 2 in the axial direction of the hub 2.

In this way, the inner side surface 34 and the outer side surface 33 of the blade 3 are both cambered surfaces curved in the axial direction of the hub 2 from the outer periphery of the hub 2, and are cambered surfaces, so that the contact surface between the wind flow and the blade 3 is smoother, and noise is not easy to generate.

As shown in fig. 1 to 5, the blade 3 has a flat plate shape, and the profile of the outer surface 33 is a circular arc profile or an elliptical profile, and the profile of the inner surface 34 is a circular arc profile or an elliptical profile.

The blades 3 are arranged in a flat plate shape, and the wind flow leaves the centrifugal fan blade from the gap between the adjacent blades 3. The molded lines of the outer side surface 33 are arc molded lines or elliptical molded lines, so that the contact surface of the centrifugal fan blade with air is smoother when the centrifugal fan blade rotates, and noise is not easy to generate. The molded lines of the inner side surface 34 are arc molded lines or elliptical molded lines, so that the contact surface of the blade 3 when the wind current is disturbed is smoother, and noise is less prone to being generated.

As shown in fig. 5, in a section through the axis of the hub 2, the radius of the outer side surface 33 is R1, and the radius of the inner side surface 34 is R2, R1 < R2.

So set up, the radius of lateral surface 33 is less than the radius of medial surface 34 for blade 3 is crooked sunken from the axis direction of the outside circumference wheel hub 2 of wheel hub 2, and the width of second end 32 is greater than the width of first end 31, and the excessive between blade 3 from first end 31 to second end 32 is smoother, and the face that contacts with the wind current is smoother, is difficult for producing the noise.

As shown in fig. 5, in a section through the axis of the hub 2, a line connecting the center of the outer side 33 and the center of the inner side 34 is parallel to the axis of the hub 2, the width of the second end 32 is H2, and the distance between the center of the outer side 33 and the center of the inner side 34 is H3, where H3 < H2.

So set up, the line of the centre of a circle of lateral surface 33 and the centre of a circle of medial surface 34 is on a parallel with the axis of wheel hub 2 for the preparation of lateral surface 33 and medial surface 34 is more convenient, and the location size is more accurate. The distance between the center of the outer side 33 and the center of the inner side 34 is smaller than the width of the second end 32, so that the influence on the use of the blade 3 caused by the overlarge size gap between the outer side 33 and the inner side 34 is avoided.

As shown in fig. 5, in the axial direction of the hub 2, the distance between the first end 31 and the second end 32 is H4; the radius of the outer side 33 is R1, H4-5 mm.ltoreq.R1.ltoreq.H2+5 mm in a section through the axis of the hub 2.

By the arrangement, H4-5mm is less than or equal to R1 and less than or equal to H4+5mm, the radius of the outer side face 33 is limited, and the influence on the applicability of the blade 3 due to the overlarge radius of the outer side face 33 is avoided.

As shown in fig. 5, in a section through the axis of the hub 2, and in the axial direction of the hub 2, the center of the outer side surface is spaced from the first end 31 by a distance H5, and the distance between the first end 31 and the second end 32 is H4, h4=2h5.

So set up, the centre of a circle of lateral surface 33 and the distance of first end 31 are half of the distance between first end 31 and the second end 32, set up the centre of a circle of lateral surface 33 in the half department of blade 3 length for the lateral surface 33 of blade 3 is rock blade 3 length direction's central line symmetry, make the face that blade 3 contacted with the outside air smoother, the air resistance that receives is littleer, difficult noise.

As shown in fig. 5, she Lunjuan 1 is annular, she Lunjuan is the inlet end of the centrifugal fan blade, and a part of the hub 2 is located in the area surrounded by the plurality of blades 3.

So set up, she Lunjuan and wheel hub 2 are fixed to be set up in the both ends of a plurality of blades 3, and the air current gets into between a plurality of blades 3 from impeller circle 1, and the air current leaves the centrifugal fan blade from the clearance between two adjacent blades 3.

According to another aspect of the utility model, a centrifugal fan is provided, comprising the centrifugal fan blade. So set up, centrifugal fan still includes spiral case isotructure, and centrifugal fan blade is more even to the disturbance of wind flow for the wind flow that gets into the spiral case is also more even, makes centrifugal fan be difficult for producing the noise, and is more environmental protection.

According to still another aspect of the present utility model, there is provided an air conditioner including the centrifugal fan described above. The centrifugal fan which is not easy to generate noise is arranged on the air conditioner, so that noise pollution is reduced, and the applicability of the air conditioner is improved.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

Claims (11)

1. The centrifugal fan blade is characterized by comprising a She Lunjuan (1), a hub (2) and a plurality of blades (3), wherein the hub (2) and the impeller ring (1) are coaxial and are arranged at intervals, the blades (3) are uniformly distributed along the circumferential direction of the hub (2),

the two ends of the blade (3) along the axial direction of the hub (2) are respectively a first end (31) and a second end (32), the first end (31) is connected with the impeller ring (1), and the second end (32) is connected with the hub (2); the width of the first end (31) is smaller than the width of the second end (32) in the radial direction of the hub (2).

2. Centrifugal fan blade according to claim 1, wherein the first end (31) has a width H1 and the second end (32) has a width H2,3H1 ∈h2 ∈4h1.

3. Centrifugal fan blade according to claim 1, wherein the blade (3) has an outer side (33) facing away from the axis of the hub (2) and an inner side (34) facing towards the axis of the hub (2), both the outer side (33) and the inner side (34) being cambered surfaces curving from the outer circumference of the hub (2) towards the axis of the hub (2).

4. A centrifugal fan blade according to claim 3, wherein the blade (3) is plate-shaped, the profile of the outer side (33) is an arc-shaped profile or an oval-shaped profile, and the profile of the inner side (34) is an arc-shaped profile or an oval-shaped profile.

5. A centrifugal fan blade according to claim 3, wherein the radius of the outer side (33) is R1 and the radius of the inner side (34) is R2, R1 < R2, in a section through the axis of the hub (2).

6. A centrifugal fan blade according to claim 3, wherein, in a cross-section through the axis of the hub (2), the line connecting the centre of the outer side (33) and the centre of the inner side (34) is parallel to the axis of the hub (2), the width of the second end (32) is H2, and the distance between the centre of the outer side (33) and the centre of the inner side (34) is H3, H3 < H2.

7. A centrifugal fan blade according to claim 3, wherein the distance between the first end (31) and the second end (32) in the axial direction of the hub (2) is H4; on a section passing through the axis of the hub (2), the radius of the outer side surface (33) is R1, H4-5mm is less than or equal to R1 and less than or equal to H4+5mm.

8. A centrifugal fan blade according to claim 3, wherein in a cross section through the axis of the hub (2) and in the axial direction of the hub (2), the centre of the outer side (33) is at a distance H5 from the first end (31), and the distance between the first end (31) and the second end (32) is H4, h4=2h5.

9. Centrifugal fan blade according to claim 1, wherein the impeller ring (1) is annular, the impeller ring (1) is an air inlet end of the centrifugal fan blade, and a part of the hub (2) is located in a region formed by surrounding a plurality of the blades (3).

10. A centrifugal fan comprising a centrifugal fan blade according to any one of claims 1 to 9.

11. An air conditioner comprising the centrifugal fan of claim 10.