Flat fan with circumferential air outlet characteristic

Abstract

The flat fan with the circumferential air outlet characteristic comprises an impeller body, the impeller body is of a circular structure and is rotatably arranged in a shell assembly through a driving part, the impeller body is provided with a second side wall, the second side wall is of an annular structure, and a mounting part is arranged in the impeller body; an air inlet space is formed between the second side wall and the mounting part; the blade structure is arranged in the impeller body, the blade structure is provided with a plurality of blades arranged in the circumferential direction, and at least two blades are different in design angle or design height; therefore, the impeller structure is driven by the driving part to rotate, external air enters the impeller body from the air inlet and is discharged outwards in the radial direction, and due to the fact that the blade structures are different, when the impeller body works, the frequencies of airflow fluctuations generated by the at least two blades are different and can offset each other. And the influence generated by resonance is effectively reduced, and then noise and vibration generated when the impeller body works can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of fans, in particular to a flat fan with circumferential air outlet characteristics. BACKGROUND

[0002] The centrifugal fan is distinguished from the axial fan, and the centrifugal fan comprises a motor, and a blade structure connected with a rotating shaft of the motor and rotating. In operation, the blade structure has a plurality of ejection ports for ejecting air sucked from a suction port opening in a direction of an axis of the rotating shaft towards a radial direction of the rotating shaft, and the ejection ports are used to turn an axial airflow entering from an air inlet into a radial airflow along the blade structure and then discharge the radial airflow from an air outlet through rotation of a fan blade to drive surrounding air flow;

[0003] The blade structure of the current centrifugal fan has blades uniformly arranged in the circumferential direction, and each dimension of the blades is the same. Therefore, in use, resonance and other influences are easily generated, and noise is increased.

[0004] Therefore, the present disclosure provides a flat fan with circumferential air outlet characteristics. CONTENT OF THE INVENTION

[0005] In view of the above defects or deficiencies in the prior art, it is desirable to provide a flat fan with circumferential air outlet characteristics.

[0006] In a first aspect, the present disclosure provides a flat fan with circumferential air outlet characteristics, comprising:

[0007] A housing assembly forms an installation space inside, and has a first side wall with an air inlet opening and communicating with the installation space, and a circumferential side wall with a first air outlet opening and communicating with the installation space.

[0008] A driving member is arranged inside the installation space.

[0009] A impeller body is a circular structure, and is rotatably arranged inside the housing assembly. The impeller body has a second side wall which is an annular structure, and a third side wall which is a circular structure and oppositely arranged with the second side wall. The second side wall and the third side wall circumferentially form a second air outlet opening which communicates with the first air outlet opening. An installation portion is coaxially and fixedly arranged in the impeller body, and is used to connect with a driving end of the driving member. The installation portion is located in a middle portion of the third side wall, and an air inlet space is formed between the second side wall and the installation portion, and the air inlet space communicates with the air inlet opening.

[0010] The vane structure is arranged between the second side wall and the third side wall, and the vane structure has a plurality of vanes arranged circumferentially, and at least two of the vanes have different design angles or different design heights.

[0011] According to the technical scheme provided in the embodiments of the present application, when the design angles of at least two of the vanes are different, the design angle is the angle between the line connecting the outermost end of the vane and the center of the impeller body and the line connecting the outermost end of the adjacent vane in the counterclockwise direction of the vane and the center of the impeller body.

[0012] According to the technical scheme provided in the embodiments of the present application, the vane structure has a first symmetry line in the radial direction thereof, the vane structure has a first vane, the first vane has a first design angle, the first design angle is the angle between the line connecting the outermost end of the first vane and the center of the impeller body and the line connecting the outermost end of the adjacent vane in the counterclockwise direction of the first vane and the center of the impeller body, and the first symmetry line bisects the first design angle.

[0013] According to the technical scheme provided in the embodiments of the present application, the design angles of two vanes symmetric about the first symmetry line are similar or equal, and when the design angles of two vanes symmetric about the first symmetry line are similar, the difference between the angles is ±5°.

[0014] According to the technical scheme provided in the embodiments of the present application, the design angles of each of the vanes are different.

[0015] According to the technical scheme provided in the embodiments of the present application, when the design heights of at least two of the vanes are different, the design height is the distance between the plane where the end of the part of the vane extending to the air inlet space is located and the plane where the third side wall is located.

[0016] According to the technical scheme provided in the embodiments of the present application, the plurality of vanes are arranged in a plurality of groups in the circumferential direction, and the design heights of the plurality of vanes in each group gradually decrease.

[0017] According to the technical scheme provided in the embodiments of the present application, the vane structure further has a second vane, and the design height of the second vane is different from that of the other vanes.

[0018] According to the technical scheme provided in the embodiments of the present application, the design heights of each of the vanes are different.

[0019] According to the technical scheme provided in the embodiments of the present application, the number of vanes is a prime number.

[0020] In summary, the technical scheme specifically discloses a flat fan with a circumferential air outlet characteristic, which comprises a shell assembly, an installation space is formed in the shell assembly, the shell assembly has a first side wall, an air inlet is formed in the first side wall and communicates with the installation space, and a first air outlet is formed in the circumferential side wall of the shell assembly and communicates with the installation space; a impeller body, the impeller body is a circular structure, the impeller body is rotatably arranged in the installation space through a driving member, the impeller body has a second side wall, the second side wall is an annular structure, an installation portion is coaxially and fixedly arranged in the impeller body and used for connecting the driving member, the installation portion is located in the middle of the second side wall, and an air inlet space is formed between the second side wall and the installation portion; a blade structure is arranged in the impeller body, the blade structure has a plurality of blades arranged in the circumferential direction, and the design angle or the design height of at least two blades is different.

[0021] Therefore, the impeller structure is driven to rotate through the driving member, external air enters the air inlet space from the air inlet, and then is discharged radially outward along the impeller body, because the design angle or the design height of at least two blades is different, the frequency of air flow fluctuation generated by the at least two blades is different when the impeller body works, the air flow fluctuation of different frequencies can offset each other, compared with the case that the blades are all the same in the prior art, the influence of resonance is effectively reduced, and then the noise and vibration generated when the impeller body works can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other characteristics, objects and advantages of the present application will become more apparent from the following detailed description of non-restrictive embodiments made with reference to the attached drawings:

[0023] Figure 1 It is a schematic view of a flat fan with a circumferential air outlet characteristic.

[0024] Figure 2 It is Figure 1 A sectional view of the flat fan.

[0025] Figure 3 It is another schematic view of a flat fan with a circumferential air outlet characteristic.

[0026] Figure 4 It is Figure 2 A sectional view of the flat fan.

[0027] Figure 5 It is a schematic view of the impeller body.

[0028] Figure 6 It is a side view of the impeller body.

[0029] Figure 7 It is Figure 6 A-A sectional view.

[0030] Figure 8A top view of the impeller body.

[0031] Figure 9 A top view of the impeller body. Figure 8 A middle B-B sectional view.

[0032] Figure 10 A top view of the impeller body.

[0033] Reference signs in the drawings: 1, impeller body; 2, second side wall; 3, mounting portion; 4, air inlet space; 5, blade; 6, second air outlet; 7, first blade; 8, third side wall; 9, housing assembly; 10, first side wall; 11, air inlet; 12, first air outlet; 13, driving member; 14, first symmetry line; 15, second blade. DETAILED DESCRIPTION

[0034] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and are not a limitation on the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0035] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0036] Embodiment one

[0037] Please refer to Figures 1 to 4 A flat fan with circumferential air outlet characteristics, comprising:

[0038] The housing assembly 9 has a first side wall 10, and the first side wall 10 is provided with an air inlet 11 communicating with the mounting space, and the circumferential side wall of the housing assembly 9 is provided with a first air outlet 12 communicating with the mounting space;

[0039] The driving member 13 is arranged inside the mounting space, and the driving member 13 has a driving end;

[0040] The impeller body 1 is circular in structure, rotatably arranged in the mounting space, and has a second side wall 2 in annular structure. The impeller body 1 also has a third side wall 8 in circular structure, which is arranged opposite and coaxially with the second side wall 2. The impeller body 1 is provided with a mounting portion 3, which is coaxially fixedly connected with the third side wall 8 and can be integrally formed. The mounting portion 3 is used to connect the driving end of the driving member 13. The second side wall 2 and the mounting portion 3 form an air inlet space 4 therebetween, which is in communication with the air inlet 11. The circumferential side wall of the impeller body 1 is uniformly provided with a second air outlet 6 in communication with the inside of the impeller body 1, and the second air outlet 6 is in communication with the first air outlet 12.

[0041] Optionally, the driving member 13 is an electric motor.

[0042] Therefore, the shell assembly includes an upper shell and a lower shell connected by fixing nails to form a mounting space. The edge shapes of the upper shell and the lower shell can be the same or different. The lower shell can be a flat plate structure with a driving member 13 in the middle or a recess in the middle, and the driving member 13 is arranged in the recess. The edge of the recess extends along the radial direction of the impeller body 1 and beyond the edge of the upper shell. The part of the lower shell beyond the edge of the upper shell can be used to fix the fan. The blade structure is arranged inside the impeller body 1 and between the second side wall 2 and the third side wall 8. The blade structure is coaxially arranged with the impeller body 1. The impeller body 1 is rotatably arranged in the mounting space and is driven to rotate by the driving member 13. The external air can enter the mounting space from the air inlet 11, enter the air inlet space, and then be transported along the radial direction of the impeller body 1 from the first air outlet 12 to the second air outlet 6, and then be discharged to the outside from the second air outlet 6.

[0043] The blade structure has a plurality of blades 5 arranged circumferentially, and each blade 5 is different.

[0044] Specifically, as shown in Figures 5 to 8 At least two blades 5 have different design angles. The design angle is the angle between the line connecting the outermost end of one blade 5 and the center of the impeller body 1 and the line connecting the outermost end of the blade 5 adjacent to it in the counterclockwise direction and the center of the impeller body 1.

[0045] Further, the number of blades 5 is a prime number. The blade structure has a first symmetry line 14 along its radial direction. The blade structure also has a first blade 7 with a first design angle. The first design angle is the angle between the line connecting the outermost end of the first blade 7 and the center of the impeller body 1 and the line connecting the outermost end of the blade 5 adjacent to it in the counterclockwise direction and the center. The first symmetry line 14 bisects the first design angle.

[0046] Since the number of the blades 5 is a prime number, the first symmetry line 14 bisects the first design angle, and therefore the remaining blades 5 are symmetric about the first symmetry line 14, and the number of the blades 5 on both sides of the first symmetry line 14 is even;

[0047] Further, the design angles of the two blades 5 opposite about the first symmetry line 14 are similar or equal, and when the design angles of the two blades 5 opposite about the first symmetry line 14 are similar, the difference between the design angles of the two blades 5 is ±5°;

[0048] For example, when the number of the blades 5 is 17, the design angle of the first blade 7 is Ω°, the design angles of the eight blades 5 on one side of the first blade 7 are κ°, ρ°, α°, β°, γ°, ε°, η°, and μ° in sequence, and the design angles of the eight blades 5 on the other side of the first blade 7 are κ1°, ρ1°, α1°, β1°, γ1°, ε1°, η1°, and μ1° in sequence, wherein the blades 5 with the design angles of κ° and κ1° are opposite about the first symmetry line, κ° and κ1° are similar or equal, and when κ° and κ1° are similar, the difference between κ° and κ1° is ±5.

[0049] It should be noted that in some embodiments, the design angle of each blade 5 is different.

[0050] Embodiment Two

[0051] The design height of the blade 5 is different;

[0052] Specifically, the design height of at least two blades 5 is different, as shown in Figure 9 and Figure 10 The design height of the blade 5 is the distance between the plane where the end of the blade 5 away from the third side wall 8 is located and the plane where the third side wall 8 is located;

[0053] Further, the plurality of blades 5 are arranged in multiple groups in the circumferential direction, and the blade structure further has a second blade 15. For example, when the number of the blades 5 is 17, the 17 blades 5 are arranged in three groups in the circumferential direction, each group including five blades 5, the design height of the five blades 5 gradually decreases in the clockwise direction, and the remaining two blades 5 are the second blades 15.

[0054] Further, the design height of the five blades 5 in each group is H1, H2, H3, H4, and H5 in sequence, and H1>H2>H3>H4>H5, and the design height of the two second blades 15 is different from the design height of the five blades 5 in each group.

[0055] It should be noted that in some embodiments, the design height of each blade 5 is different.

[0056] Working principle: through the drive of the driving member 13, the impeller body 1 can be driven to rotate, the external air enters the air inlet 11 from the air inlet space, and then enters the inside of the impeller body 1 from the air inlet space, and then is transported to the first air outlet 12 by the second air outlet 6, and is discharged to the outside. Because the design angles and design heights of the blades 5 are different, each blade 5 is different. Therefore, when the impeller body 1 works, the frequency of the airflow fluctuation generated by each blade 5 is different. The airflow fluctuation of different frequencies can offset each other. Compared with the prior art in which each blade 5 is the same, the flat fan with the circumferential air outlet characteristic of the application effectively reduces the influence of resonance, thereby reducing noise.

[0057] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by the combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) with similar functions to form a technical solution.

Claims

1. A flat fan with circumferential airflow characteristics, characterized in that, include: The housing assembly (9) has an installation space inside, and has a first sidewall (10). An air inlet (11) communicating with the installation space is provided on the first sidewall (10), and a first air outlet (12) communicating with the installation space is provided on the circumferential sidewall of the housing assembly (9). A driving component (13) is disposed inside the mounting space; Impeller body (1), the impeller body (1) is a circular structure, the impeller body (1) is rotatably disposed inside the housing assembly (9), the impeller body (1) has a second side wall (2), the second side wall (2) is annular structure, the impeller body (1) also has a third side wall (8), the third side wall (8) is a circular structure, and it is disposed opposite to the second side wall (2); the second side wall (2) and the third side wall (8) form a second air outlet (6) that is connected to the first air outlet (12) in the circumferential direction, and a mounting part (3) is coaxially fixedly disposed inside the impeller body (1) for connecting with the driving end of the driving component (13), and the mounting part (3) is located in the middle of the third side wall (8), and an air inlet space (4) is formed between the second side wall (2) and the mounting part (3), and the air inlet space (4) is connected to the air inlet (11); The blade structure is disposed between the second sidewall (2) and the third sidewall (8), and the blade structure has a plurality of blades (5) arranged circumferentially, at least two of the blades (5) having different design angles or design heights.

2. A flat fan with circumferential airflow characteristics according to claim 1, characterized in that, When at least two blades (5) have different design angles, the design angle is the angle between the line connecting the outermost end of the blade (5) to the center of the impeller body (1) and the line connecting the outermost end of the blade (5) adjacent to the blade (5) in the counterclockwise direction to the center.

3. A flat fan with circumferential airflow characteristics according to claim 2, characterized in that, The blade structure has a first line of symmetry (14) along its radial direction, the blade structure has a first blade (7), the first blade (7) has a first design angle, the first design angle is the angle between the line connecting the outermost end of the first blade (7) and the center of the impeller body (1) and the line connecting the outermost end of the blade (5) adjacent to the first blade (7) in the counterclockwise direction and the center of the impeller body (1), the first line of symmetry (14) bisects the first design angle.

4. A flat fan with circumferential airflow characteristics according to claim 3, characterized in that, The design angles of the two blades (5) that are symmetrical about the first line of symmetry (14) are similar or equal. When the design angles of the two blades (5) that are symmetrical about the first line of symmetry (14) are similar, the difference between their angles is ±5°.

5. A flat fan with circumferential airflow characteristics according to claim 2, characterized in that, Each blade (5) has a different design angle.

6. A flat fan with circumferential airflow characteristics according to claim 1, characterized in that, When at least two of the blades (5) have different design heights, the design height is the distance between the plane of the part of the blade (5) extending into the air inlet space (4) that is away from the third sidewall (8) and the plane of the third sidewall (8).

7. A flat fan with circumferential airflow characteristics according to claim 6, characterized in that, The multiple blades (5) are arranged in multiple groups in the circumferential direction, and the design height of the multiple blades (5) in each group gradually decreases.

8. A flat fan with circumferential airflow characteristics according to claim 7, characterized in that, The blade structure also has a second blade (15), which is designed at a different height from the other blades (5).

9. A flat fan with circumferential airflow characteristics according to claim 6, characterized in that, The design height of each blade (5) is different.

10. A flat fan with circumferential airflow characteristics according to claim 1, characterized in that, The number of the blades (5) is a prime number.

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