High-static-pressure direct-current brushless fan

Abstract

The utility model relates to the technical field of fans, in particular to a high-static-pressure direct-current brushless fan, which is characterized in that the output end of a brushless motor is connected to an inner cover; a plurality of fan blades are connected between the outer cover and the inner cover; the fan blades are circumferentially distributed on the outer cover; the fan blades extend from one end of the outer cover to the other end of the outer cover; a flow channel is formed between every two adjacent fan blades; an axial flow fan blade and a centrifugal fan blade are arranged at the two ends of the fan blade respectively; and the centrifugal fan blades extend out of the outer cover. When the fan is used, the air suction capacity and the air suction capacity of the fan are improved by utilizing the advantage of large air volume of the axial flow fan blades and the advantage of large pressure of the centrifugal fan blades in one fan blade structure.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a high static pressure direct current brushless fan. Background Art

[0002] The air purification device uses a fan to create negative pressure inside the device, sucking air into the air purification device for filtration and discharge.

[0003] In the existing air purification device structure, the exhaust fan blades of the fan generally adopt axial flow blades or centrifugal blades; although the axial flow blades have a large air volume, the suction pressure is low and the exhaust gas suction capacity is poor; although the centrifugal blades have a large suction pressure, the air volume is small and the exhaust gas extraction efficiency is low.

[0004] Therefore, it is necessary to further improve the existing fan. Utility Model Content

[0005] The utility model aims to provide a high static pressure DC brushless fan in view of the defects and shortcomings of the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model discloses a high static pressure DC brushless fan, which comprises a brushless motor, an inner cover and an outer cover sleeved outside the inner cover; the output end of the brushless motor is connected to the inner cover; a plurality of blades are connected between the outer cover and the inner cover; the blades are distributed in a circumference on the outer cover; the blades extend from one end of the outer cover to the other end of the outer cover;

[0008] A flow channel is formed between two adjacent blades; axial flow blades and centrifugal blades are respectively arranged at two ends of the blade; and the centrifugal blades extend out of the outer cover.

[0009] Furthermore, the inner cover is provided with a motor connecting sleeve on one side close to the centrifugal fan blades; the output end of the brushless motor is fixed with a connecting seat matching the inner hole of the motor connecting sleeve; the connecting seat is embedded and fixed on the motor connecting sleeve.

[0010] Furthermore, a plurality of reinforcing ribs are evenly distributed between the motor connecting sleeve and the inner surface of the inner cover.

[0011] Furthermore, a guide portion is connected between the axial flow fan blades and the centrifugal fan blades; the fan blades are composed of an axial flow fan blade, a guide portion and a centrifugal fan blade; the axial flow fan blade, the guide portion, the centrifugal fan blade, the outer cover and the inner cover are integrally formed.

[0012] Furthermore, the inner diameter of the outer cover and the outer diameter of the inner cover gradually increase from the axial flow blades to the centrifugal blades; the axial flow blades are arranged at the top of the inner cover; and the axial flow blades are arranged inside the outer cover.

[0013] After adopting the above structure, the beneficial effects of the utility model are as follows: when using the high static pressure DC brushless fan described in the utility model, because the centrifugal fan blades extend out of the outer cover, the outer cover will not block the exhaust of exhaust gas, thereby reducing wind resistance; the fan blades are used to divide the gap between the outer cover and the inner cover into multiple independent flow channels, thereby preventing the airflows between adjacent flow channels from interpenetrating and improving the stability of the airflow; the fan blades connect the outer cover and the inner cover as one body, with high coaxiality and greater silence; the axial flow fan blades are arranged on one side of the air inlet, and the centrifugal fan blades are arranged on one side of the air outlet, and the advantages of the large air volume of the axial flow fan blades are combined with the advantages of the high pressure of the centrifugal fan blades in one fan blade structure to improve the suction capacity and air volume of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is an exploded view of the utility model;

[0016] Figure 3 It is a first-person perspective stereogram of the fan blade body;

[0017] Figure 4 It is the front view of the utility model;

[0018] Figure 5 It is a second-view stereogram of the main body of the fan blade;

[0019] Figure 6 It is a partial cross-sectional view of the fan blade body from the first perspective;

[0020] Figure 7 is a partial cross-sectional view of the fan blade body from a second perspective;

[0021] Figure 8 It is the structural diagram of the fan blade;

[0022] Description of reference numerals:

[0023] 1. Brushless motor; 101. Connecting seat; 2. Reinforcement ribs; 3. Fan blades;

[0024] 301, axial flow fan blade; 302, flow guide; 303, centrifugal fan blade; 4, outer cover; 5, inner cover;

[0025] 501. Motor connecting sleeve; A. Flow channel. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 8 As shown, the utility model discloses a high static pressure DC brushless fan, which comprises a brushless motor 1, an inner cover 5 and an outer cover 4 sleeved outside the inner cover 5; the output end of the brushless motor 1 is connected to the inner cover 5; a plurality of blades 3 are connected between the outer cover 4 and the inner cover 5; the blades 3 are distributed in a circumference on the outer cover 4; the blades 3 extend from one end of the outer cover 4 to the other end of the outer cover 4;

[0028] A flow channel A is formed between two adjacent blades 3; axial flow blades 301 and centrifugal blades 303 are respectively provided at both ends of the blade 3; the centrifugal blades 303 extend out of the outer cover 4;

[0029] Because the centrifugal blades 303 extend out of the outer cover 4, the outer cover 4 will not block the exhaust gas from being discharged, thereby reducing wind resistance;

[0030] The shapes of the axial flow blades 301 and the centrifugal blades 303 are essentially the same as those in the prior art, so they will not be described in detail.

[0031] The fan blades 3 are used to separate the gap between the outer cover 4 and the inner cover 5 into multiple independent flow channels A, so as to prevent the airflows between adjacent flow channels A from interflowing and improve the stability of the airflow;

[0032] The fan blade 3 connects the outer cover 4 and the inner cover 5 into one body, with high coaxiality and more quiet;

[0033] The axial flow blades 301 are arranged on one side of the air inlet, and the centrifugal blades 303 are arranged on one side of the air outlet. The advantages of the large air volume of the axial flow blades 301 and the high pressure of the centrifugal blades 303 are combined in one blade structure to improve the suction capacity and air volume of the fan.

[0034] As a preferred embodiment of the present invention, the inner cover 5 is provided with a motor connecting sleeve 501 on one side close to the centrifugal blades 303; the output end of the brushless motor 1 is fixed with a connecting seat 101 matching the inner hole of the motor connecting sleeve 501; the connecting seat 101 is embedded and fixed on the motor connecting sleeve 501;

[0035] The wind direction of the centrifugal fan blades 303 is discharged along the radial direction of the inner cover 5. Therefore, by setting the brushless motor 1 in the middle of the inner cover 5, the chance of exhaust gas contacting the brushless motor 1 can be reduced, and the risk of the brushless motor 1 being corroded by the exhaust gas can be reduced; and the use of an embedded motor mounting structure makes the volume of the entire fan structure smaller.

[0036] As a preferred embodiment of the present invention, a plurality of reinforcing ribs 2 are evenly distributed between the motor connecting sleeve 501 and the inner surface of the inner cover 5 ; the reinforcing ribs 2 are used to strengthen the strength of the inner cover 5 .

[0037] As a preferred embodiment of the utility model, a guide portion 302 is connected between the axial flow blades 301 and the centrifugal blades 303; the fan blades 3 are composed of the axial flow blades 301, the guide portion 302 and the centrifugal blades 303; the axial flow blades 301, the guide portion 302, the centrifugal blades 303, the outer cover 4 and the inner cover 5 are integrally formed; the fan blades 3, the outer cover 4 and the inner cover 5 are an integrated structure to increase the strength of the axial flow blades 301 and the centrifugal blades 303, making the gas flow more stable; and simplifying the assembly steps of the fan.

[0038] As a preferred embodiment of the present invention, the inner diameter of the outer cover 4 and the outer diameter of the inner cover 5 gradually increase from the axial flow blade 301 to the centrifugal blade 303; the axial flow blade 301 is arranged at the top of the inner cover 5; the axial flow blade 301 is arranged inside the outer cover 4;

[0039] The outer cover 4 and the inner cover 5 are arranged in a conical structure, so that the airflow in the flow channel A flows into the centrifugal blades 303 at a certain angle, and the angle between the air intake entering the centrifugal blades 303 and the air outlet direction discharged from the centrifugal blades 303 is an obtuse angle, which reduces wind resistance and improves air outlet efficiency.

[0040] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A high static pressure DC brushless fan, characterized in that: It comprises a brushless motor (1), an inner cover (5), and an outer cover (4) sleeved outside the inner cover (5); the output end of the brushless motor (1) is connected to the inner cover (5); a plurality of blades (3) are connected between the outer cover (4) and the inner cover (5); the blades (3) are distributed in a circular pattern on the outer cover (4); the blades (3) extend from one end of the outer cover (4) to the other end of the outer cover (4); A flow channel (A) is formed between two adjacent blades (3); an axial flow blade (301) and a centrifugal blade (303) are respectively provided at two ends of the blade (3); and the centrifugal blade (303) extends to the outside of the outer cover (4).

2. A high static pressure DC brushless fan according to claim 1, characterized in that: The inner cover (5) is provided with a motor connecting sleeve (501) on a side close to the centrifugal blades (303); a connecting seat (101) matching the inner hole of the motor connecting sleeve (501) is fixed to the output end of the brushless motor (1); and the connecting seat (101) is embedded and fixed on the motor connecting sleeve (501).

3. A high static pressure DC brushless fan according to claim 2, characterized in that: A plurality of reinforcing ribs (2) are evenly distributed between the motor connection sleeve (501) and the inner surface of the inner cover (5).

4. The high static pressure DC brushless fan according to claim 2, characterized in that: A flow guide portion (302) is connected between the axial flow blade (301) and the centrifugal blade (303); the blade (3) is composed of the axial flow blade (301), the flow guide portion (302) and the centrifugal blade (303); and the axial flow blade (301), the flow guide portion (302), the centrifugal blade (303), the outer cover (4) and the inner cover (5) are integrally formed.

5. The high static pressure DC brushless fan according to claim 1, characterized in that: The inner diameter of the outer cover (4) and the outer diameter of the inner cover (5) both gradually increase in a direction from the axial flow blades (301) to the centrifugal blades (303); the axial flow blades (301) are arranged at the top of the inner cover (5); and the axial flow blades (301) are arranged inside the outer cover (4).

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