A fan with a horn-shaped integral injection-molded mesh cover

Abstract

The utility model relates to a fan with horn mouth shape integral injection molding mesh cover, including the air duct, impeller and motor of fan, the air duct includes the air inlet cylinder of lower part cylindrical ring and the air outlet cylinder of upper horn mouth shape, the lower end of air inlet cylinder is shaped with rectangular mounting panel, the upper end is shaped with the horn mouth shape of link cylinder mouth, the upper end of link cylinder mouth is shaped with the circular lower connecting edge, the lower end of air outlet cylinder is shaped with the upper connecting edge opposite with lower connecting edge, and the upper connecting edge is fixed with lower connecting edge through first bolt component, the upper end of air outlet cylinder is shaped with the protective mesh cover, and the middle part of protective mesh cover is shaped with the downward recess and is shaped with the circular truncated cone shape of fairing, the fan aims at vortex problem, and designs a kind of injection integrated mesh cover, and the inside and outside of mesh cover are equipped with anti-vortex structure, can eliminate the vortex of axial fan air outlet end, improve the efficiency of fan.

Description

Technical fields:

[0001] This utility model relates to the technical field of axial flow fans, and more specifically to a fan with an integral injection-molded mesh cover in the shape of a flared mouth. Background technology:

[0002] Axial flow fans have a wide range of applications. They are a type of fan where the airflow direction is the same as the axis of the fan blades, such as electric fans and air conditioner outdoor unit fans. Existing axial flow fans are generally equipped with corresponding air guide ducts, such as... Figure 1 The fan shown includes an air guide duct, an impeller, and a motor. The lower parts of the impeller and the motor are both located inside the air guide duct. The motor drives the impeller to rotate, which generates an axial airflow. Figure 1 The airflow in the fan is from bottom to top, but because the air outlet of the air duct is shaped like a horn and has a small stroke, vortices will form on the outer ring of the air duct. At the same time, vortices will be generated directly above the motor. The generation of vortices will seriously affect the efficiency of the fan. Therefore, eliminating or reducing vortices has always been the direction of fan design research, and it is necessary to design axial flow fans with no vortices or reduced vortices. Utility model content:

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a fan with a flared, one-piece injection-molded mesh cover. To address the eddy current problem, the fan is designed with a one-piece injection-molded mesh cover. Both the inner and outer sides of the mesh cover are equipped with anti-eddy current structures, which can eliminate eddy currents at the air outlet of the axial flow fan and improve the efficiency of the fan.

[0004] A fan with a flared, integrally injection-molded mesh cover includes a fan guide duct, an impeller, and a motor. The impeller is located below the motor and fixed to the motor shaft. The motor is fixed to the guide duct via several annularly distributed motor brackets. The guide duct includes a lower cylindrical annular air inlet duct and an upper flared, flared air outlet duct. The lower end of the air inlet duct has a rectangular mounting panel, and the upper end has a flared, flared connecting tube opening. The upper end of the connecting tube opening has a circular lower connecting edge. The lower end of the air outlet duct has an upper connecting edge opposite to the lower connecting edge. The upper and lower connecting edges are fixed together by a first bolt assembly. The upper end of the air outlet duct has a protective mesh cover, and the middle of the protective mesh cover has a downwardly recessed, frustum-shaped flow guide shroud.

[0005] The upper part of the motor is inserted into the air outlet and located directly below the air guide shroud, while the lower part of the motor and the impeller are located inside the air inlet.

[0006] Preferably, the motor is a cylindrical motor, and the central axis of the air inlet, the central axis of the air outlet, the central axis of the impeller and the central axis of the motor coincide.

[0007] Preferably, the inner wall of the connecting cylinder opening on the air inlet and the inner wall of the air outlet are within the same conical surface;

[0008] The first bolt assembly is provided in at least four sets, and the first bolt assembly is evenly distributed in a ring around the central axis of the air duct.

[0009] Preferably, a gap is provided between the bottom of the air guide shroud on the air outlet and the motor;

[0010] The diameter of the outer ring at the bottom of the air guide is smaller than the diameter of the outer casing of the motor.

[0011] Preferably, the air outlet, protective mesh cover, and air guide cover are integrally injection molded, and the air guide cover has a water leakage hole formed in the middle.

[0012] Preferably, the motor bracket includes two vertical spokes. The inner ends of the spokes are fixed to the motor housing by screws. The outer ends of the spokes are formed with oblique connecting rods. The ends of the connecting rods are fixed with horizontal connecting pieces. The upper connecting edge at the lower end of the air outlet is formed with several rectangular clearance openings. The connecting pieces are inserted into the clearance openings of the air outlet and abut against the lower connecting edge. The two ends of the connecting pieces are respectively provided with second bolt assemblies. The connecting pieces are fixedly connected to the lower connecting edge by the second bolt assemblies.

[0013] Both the first bolt assembly and the second bolt assembly consist of bolts and nuts.

[0014] Preferably, the inclination direction of the conical generatrix on the air outlet is the same as the inclination direction of the conical generatrix on the air guide.

[0015] The beneficial effects of this utility model are as follows:

[0016] To address the eddy current problem, this fan features an injection-molded, one-piece mesh cover. Both the inner and outer sides of the mesh cover are equipped with anti-eddy current structures, which can eliminate eddy currents at the air outlet of the axial flow fan and improve the fan's efficiency. Attached image description:

[0017] Figure 1 This is a schematic diagram illustrating the principle of airflow output from an existing fan.

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 3 This is a front view structural diagram of the present invention;

[0020] Figure 4 This is a half-sectional structural diagram of the present invention;

[0021] Figure 5 This is a schematic diagram illustrating the principle of airflow output of this utility model.

[0022] In the diagram: 1. Air inlet duct; 11. Mounting panel; 12. Connecting duct opening; 13. Lower connecting edge; 2. Air outlet duct; 21. Protective mesh cover; 22. Flow guide cover; 23. Drain hole; 24. Upper connecting edge; 25. Clearance opening; 3. Impeller; 4. Motor; 5. Motor bracket; 51. Spoke; 52. Connecting piece; 6. Second bolt assembly; 7. First bolt assembly. Detailed implementation method:

[0023] Example: See Figures 2 to 4 As shown, a fan with a flared, integrally injection-molded mesh cover includes a fan guide tube, an impeller 3, and a motor 4. The impeller 3 is located below the motor 4 and is fixed to the rotating shaft of the motor 4. The motor 4 is fixed to the guide tube by several annularly distributed motor brackets 5. The guide tube includes a lower cylindrical annular air inlet tube 1 and an upper flared air outlet tube 2. The lower end of the air inlet tube 1 is formed with a rectangular mounting panel 11, and the upper end is formed with a flared connecting tube opening 12. The upper end of the connecting tube opening 12 is formed with a circular lower connecting edge 13. The lower end of the air outlet tube 2 is formed with an upper connecting edge 24 opposite to the lower connecting edge 13. The upper connecting edge 24 and the lower connecting edge 13 are fixed together by a first bolt assembly 7. The upper end of the air outlet tube 2 is formed with a protective mesh cover 21. The middle part of the protective mesh cover 21 is formed with a downwardly recessed, frustum-shaped guide shroud 22.

[0024] The upper part of the motor 4 is inserted into the air outlet duct 2 and located directly below the guide shroud 22, while the lower part of the motor 4 and the impeller 3 are both located inside the air inlet duct 1.

[0025] The motor 4 is a cylindrical motor, and the central axis of the air inlet duct 1, the central axis of the air outlet duct 2, the central axis of the impeller 3 and the central axis of the motor 4 coincide.

[0026] The inner wall of the connecting cylinder opening 12 on the air inlet duct 1 and the inner wall of the air outlet duct 2 are in the same conical surface; thus, the airflow output from the outlet end of the air inlet duct 1 will not be blocked by the bottom of the air outlet duct 2, so that the airflow generated by the impeller 3 can be smoothly output from the air guide duct.

[0027] The first bolt assembly 7 is provided in at least four sets, and the first bolt assembly 7 is evenly distributed in a ring around the central axis of the air inlet duct 1.

[0028] A gap is provided between the bottom of the air guide shroud 22 on the air outlet duct 2 and the motor 4;

[0029] The diameter of the outer ring at the bottom of the flow guide 22 is smaller than the diameter of the outer casing of the motor 4, thereby blocking the airflow at the bottom of the flow guide 22.

[0030] The air outlet duct 2, protective net cover 21 and flow guide 22 are integrally injection molded. The flow guide 22 has a water leakage hole 23 formed in the middle. The structure of the air outlet duct 2 is injection molded, which is convenient to manufacture and can greatly save costs compared with the sheet metal structure of the air outlet duct 2.

[0031] The motor bracket 5 includes two vertical spokes 51. The inner ends of the spokes 51 are fixed to the housing of the motor 4 by screws. The outer ends of the spokes 51 are formed with oblique connecting rods. The ends of the connecting rods are fixed with horizontal connecting pieces 52. The upper connecting edge 24 at the lower end of the air outlet 2 is formed with several rectangular clearance openings 25. The connecting pieces 52 are inserted into the clearance openings 25 of the air outlet 2 and abut against the lower connecting edge 13. The two ends of the connecting pieces 52 are respectively inserted with second bolt assemblies 6. The connecting pieces 52 are fixedly connected to the lower connecting edge 13 by the second bolt assemblies 6. The air outlet 2 needs to reserve a position for installing the motor bracket 5.

[0032] The first bolt assembly 7 and the second bolt assembly 6 are both composed of bolts and nuts.

[0033] The inclination direction of the conical generatrix on the air outlet duct 2 is the same as the inclination direction of the conical generatrix on the guide shroud 22, that is, the diameter of the lower end of both the air outlet duct 2 and the guide shroud 22 is smaller than the diameter of the upper end; the outer surface area of ​​the frustum formed between the lower inner ring of the air outlet duct 2 and the lower outer ring of the guide shroud 22 is the air inlet area of ​​the air outlet duct 2, and the outer surface area of ​​the frustum formed between the upper inner ring of the air outlet duct 2 and the upper outer ring of the guide shroud 22 is the air outlet area of ​​the air outlet duct 2. The air outlet area of ​​the air outlet duct 2 is larger than the air inlet area.

[0034] Working principle: This structure is a fan with a flared, one-piece injection-molded mesh cover. The fan incorporates an air outlet duct 2. The body of the air outlet duct 2 and its internal guide shroud 22 prevent the generation of vortices. The body of the air outlet duct 2 eliminates vortices outside the guide duct, while the guide shroud 22 eliminates vortices directly above the motor 4. Figure 5 As shown;

[0035] Meanwhile, the air outlet duct 2, the protective mesh cover 21, and the guide cover 22 are all integrally injection molded, which facilitates the molding and manufacturing of the air outlet duct 2. Compared with sheet metal manufacturing of the air outlet duct 2, the separate protective mesh cover 21 and guide cover 22 can greatly save costs and greatly facilitate the assembly of the fan.

[0036] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A fan with a flared, integrally injection-molded mesh cover, comprising a fan guide tube, an impeller (3), and a motor (4), wherein the impeller (3) is located below the motor (4) and fixedly connected to the rotating shaft of the motor (4), and the motor (4) is fixedly connected to the guide tube by a plurality of annularly distributed motor brackets (5), characterized in that: The air duct includes a lower cylindrical annular air inlet duct (1) and an upper flared air outlet duct (2). The lower end of the air inlet duct (1) is formed with a rectangular mounting panel (11) and the upper end is formed with a flared connecting tube opening (12). The upper end of the connecting tube opening (12) is formed with a circular lower connecting edge (13). The lower end of the air outlet duct (2) is formed with an upper connecting edge (24) opposite to the lower connecting edge (13). The upper connecting edge (24) and the lower connecting edge (13) are fixed together by a first bolt assembly (7). The upper end of the air outlet duct (2) is formed with a protective mesh cover (21). The middle part of the protective mesh cover (21) is formed with a downwardly recessed and frustum-shaped air guide cover (22). The upper part of the motor (4) is inserted into the air outlet (2) and located directly below the guide shroud (22), while the lower part of the motor (4) and the impeller (3) are both located inside the air inlet (1).

2. The fan with a flared, integrally injection-molded mesh cover according to claim 1, characterized in that: The motor (4) is a cylindrical motor, and the central axis of the air inlet (1), the central axis of the air outlet (2), the central axis of the impeller (3) and the central axis of the motor (4) coincide.

3. The fan with a funnel-shaped integrated injection-molded mesh cover according to claim 2, characterized in that: The inner wall of the connecting cylinder opening (12) of the air inlet (1) and the inner wall of the air outlet (2) are in the same conical surface; The first bolt assembly (7) is provided with at least four sets, and the first bolt assembly (7) is evenly distributed in a ring around the central axis of the air duct (1).

4. The fan with a funnel-shaped integrated injection-molded mesh cover according to claim 2, characterized in that: A gap is provided between the bottom of the air outlet shroud (22) and the motor (4); The diameter of the outer ring at the bottom of the flow guide (22) is smaller than the diameter of the outer casing of the motor (4).

5. A fan with a funnel-shaped integrated injection-molded mesh cover according to claim 2, characterized in that: The air outlet (2), protective net cover (21) and flow guide (22) are integrally injection molded, and the flow guide (22) has a water leakage hole (23) formed in the middle.

6. A fan with a flared, integrally injection-molded mesh cover according to claim 2, characterized in that: The motor bracket (5) includes two vertical spokes (51). The inner end of the spokes (51) is fixed to the outer shell of the motor (4) by screws. The outer end of the spokes (51) is formed with an oblique connecting rod. The end of the connecting rod is fixed with a horizontal connecting piece (52). The upper connecting edge (24) at the lower end of the air outlet (2) is formed with several rectangular clearance openings (25). The connecting piece (52) is inserted into the clearance opening (25) of the air outlet (2) and abuts against the lower connecting edge (13). The two ends of the connecting piece (52) are respectively inserted with second bolt assemblies (6). The connecting piece (52) is fixedly connected to the lower connecting edge (13) by the second bolt assembly (6). The first bolt assembly (7) and the second bolt assembly (6) are both composed of bolts and nuts.

7. A fan with a funnel-shaped integrated injection-molded mesh cover according to claim 2, characterized in that: The inclination direction of the conical generatrix on the air outlet (2) is the same as the inclination direction of the conical generatrix on the air guide (22).

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