Novel double-impeller fan

Abstract

A mounting base is fixedly arranged at the bottom of a shell assembly, a PCB is arranged on the inner side of the mounting base, a motor is installed at the upper end of the PCB in a matched mode, the output end of the motor is in transmission connection with a rotor, a plurality of inner impellers are evenly distributed at the upper end of the rotor in the circumferential direction, and the inner impellers are arranged in the shell assembly. The periphery of the rotor is connected with the outer impeller through a reinforcing ring, and an exhaust channel is formed between the outer impeller and the shell assembly. According to the utility model, the structure is simple and compact, the motor generates a magnetic field by electrifying the PCB, and the permanent magnet sheets fixed in the rotor generate acting force to drive the rotor to rotate; the rotor rotates around the center shaft, and the inner impeller rotates synchronously to discharge fluid in the middle area into the working area of the outer impeller. And the outer impeller works synchronously, and the fluid is exhausted from the cavity along the exhaust channel, so that the purpose of increasing the air volume is achieved, and high-load work can be effectively and continuously carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of radiators, in particular to a novel double-impeller fan. Background Art

[0002] The computing power of electronic driver chips is getting stronger and stronger, and the power is getting higher and higher, but at the same time, the size of electronic products is getting smaller and smaller, resulting in an increasing amount of heat generated per unit volume, which also increases the requirements for radiators. A radiator is a device or instrument that transfers the heat generated by machinery or other equipment in the working process in a timely manner to avoid affecting its normal operation. Common radiators can be divided into air cooling, heat pipe radiators, liquid cooling, semiconductor refrigeration, compressor refrigeration and other types according to the heat dissipation method. As an important part of the active heat dissipation system, the fan performance indicator air volume (CFM) is particularly important. At present, most of the cooling fans used on radiators are single-layer blade structures. When the temperature is higher than the normal range, the way to improve the efficiency of heat dissipation is to increase the speed of the cooling fan to accelerate the flow and exchange of heat between the radiator and the air. However, when the cooling fan is working under high load for a long time, the working performance of the cooling fan will be reduced. Utility Model Content

[0003] The purpose of the utility model is to provide a double-impeller fan which can effectively increase the air volume and improve the heat dissipation effect under the same volume, and effectively solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0005] A novel double-impeller fan comprises a shell assembly, a mounting seat, a PCB board, a motor, an inner impeller, a reinforcement ring and an outer impeller, wherein a cavity is formed in the shell assembly, a mounting seat is fixedly provided at the bottom of the cavity, a PCB board is provided inside the mounting seat, a motor is adapted to be installed on the upper end of the PCB board, an output end of the motor is transmission-connected to a rotor, a plurality of inner impellers are evenly distributed along the circumferential direction on the upper end of the rotor, the outer periphery of the rotor is connected to the outer impeller via a reinforcement ring, and an exhaust passage is formed between the outer impeller and the shell assembly.

[0006] Preferably, the shell assembly includes a lower shell, a cover shell and an upper shell, the mounting base is fixed at a non-center position of the lower shell, and the lower shell is evenly provided with a plurality of through grooves along the periphery of the mounting base; the lower shell and the cover shell are integrally formed, the upper end of the cover shell is fixedly connected to the upper shell by screws, and a circular through hole is provided on the upper shell.

[0007] Preferably, a permanent magnet sheet is provided between the outer side of the motor and the rotor.

[0008] Preferably, a central shaft is passed through the center of the motor, and the upper end of the central shaft is fixedly connected to the inner center of the rotor.

[0009] Preferably, a clamping groove is provided in the middle of the inner side of the outer impeller, one end of the reinforcing ring is clamped into the clamping groove, and the other end is fixedly connected to the outer wall of the rotor.

[0010] Preferably, the blades of the outer impeller and the inner impeller face in opposite directions.

[0011] Preferably, the diameter of the through hole is larger than the diameter of the inner impeller and smaller than the diameter of the outer impeller.

[0012] Preferably, the through groove is arc-shaped.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] (1) In the present utility model, a mounting seat is fixedly provided at the bottom of the housing assembly, a PCB board is provided inside the mounting seat, a motor is adaptively mounted on the upper end of the PCB board, the output end of the motor is in transmission connection with the rotor, a plurality of inner impellers are uniformly distributed along the circumference at the upper end of the rotor, the outer circumference of the rotor is connected to the outer impeller through a reinforcing ring, and an air exhaust channel is formed between the outer impeller and the housing assembly. The structure of the present utility model is simple and compact. By energizing the PCB board, the motor generates a magnetic field, and through the permanent magnet pieces fixed in the rotor, a force is generated to drive the rotor to rotate; the rotor rotates around the central axis, and the inner impellers rotate synchronously to discharge the fluid in the middle area into the working area of the outer impeller; the outer impeller works synchronously to discharge the fluid from the cavity along the air exhaust channel, so as to achieve the purpose of increasing the air volume and can effectively and continuously perform high-load work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded view of the present utility model;

[0016] Figure 2 is a structural schematic diagram of the present utility model;

[0017] Figure 3 is a sectional view of the present utility model;

[0018] Figure 4 is a top view of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0020] Such as Figures 1 to 4As shown in the figure, a new type of double-impeller fan includes a mounting base 1, a PCB board 2, a motor 3, an inner impeller 4, a reinforcing ring 5, an outer impeller 6, an exhaust passage 7, a lower housing 8, a cover housing 9, an upper housing 10, a through groove 11, a through hole 12, a permanent magnet sheet 13, a central shaft 14, and a rotor 15.

[0021] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] As Figures 1 to 4 As shown in the figure, a cavity is formed inside the housing assembly. The mounting base 1 is fixedly provided at the bottom of the cavity. The inner side of the mounting base 1 is provided with a PCB board 2. The upper end of the PCB board 2 is adaptively installed with a motor 3. The output end of the motor 3 is drivingly connected to the rotor 15. A plurality of inner impellers 4 are evenly distributed along the circumferential direction at the upper end of the rotor 15. The outer periphery of the rotor is connected to the outer impeller 6 through a reinforcing ring 5. An exhaust passage 7 is formed between the outer impeller 6 and the housing assembly.

[0024] The housing assembly includes a lower housing 8, a cover housing 9, and an upper housing 10. The mounting base 1 is fixedly provided at a non-central position of the lower housing 8. The lower housing 8 is evenly provided with a plurality of through grooves 11 along the periphery of the mounting base 1. The through grooves 11 are arc-shaped. The lower housing 8 and the cover housing 9 are integrally formed. The upper end of the cover housing 9 is fixedly connected to the upper housing 10 by screws. A circular through hole 12 is provided on the upper housing 10. The diameter of the through hole 12 is larger than the diameter of the rotor 15, and the diameter of the through hole 12 is smaller than the diameter of the outer impeller 6. The through hole 12 is opposite to the through groove 11, which is convenient for air intake inside the housing assembly.

[0025] A permanent magnet sheet 13 is provided between the outside of the motor 3 and the rotor 15. A central shaft 14 passes through the center of the motor 3. The upper end of the central shaft 14 is fixedly connected to the center of the inner side of the rotor 15.

[0026] A clamping groove is provided in the middle of the inner side of the outer impeller 6. One end of the reinforcing ring 5 is clamped into the clamping groove, and the other end is fixedly connected to the outer wall of the rotor 15, so that the inner impeller 4 and the outer impeller 6 can rotate synchronously.

[0027] The blades of the outer impeller 6 and the inner impeller 4 face in opposite directions, so that the fluid to be cooled can be more evenly discharged by the outer impeller 6 along the exhaust passage 7.

[0028] The working principle of the present utility model is as follows: The PCB board 2 is powered on to enable the motor 3 to generate a magnetic field. A magnetic force is generated through the permanent magnet piece 13 fixed in the rotor 15 to drive the rotor 15 to rotate; the rotor 15 rotates around the central axis 14, and the inner impeller 4 rotates synchronously to discharge the fluid in the middle area into the working area of the outer impeller 6; the outer impeller 6 works synchronously to discharge the fluid from the cavity along the exhaust passage 7, so as to achieve the purpose of increasing the air volume and be able to effectively and continuously perform high-load work.

[0029] Under the same conditions, the comparison of the CFMD data of the double-impeller fan obtained in this embodiment and the fan with ordinary fan blades normally purchased in the prior art at different air pressures is shown in Table 1 below. It can be seen from Table 1 that the air volume of the double-impeller fan in this embodiment is increased by about 5% compared with the prior art.

[0030]

[0031] Table 1

[0032] The above embodiments are only the preferred embodiments of the present utility model and cannot be used to limit the scope of rights of the present utility model. Therefore, modifications, equivalent changes, improvements, etc. made according to the scope of the patent application of the present utility model still fall within the scope covered by the present utility model.

Claims

1. A novel double impeller fan, characterized in that: It includes a housing assembly, a mounting seat (1), a PCB board (2), a motor (3), an inner impeller (4), a reinforcing ring (5), an outer impeller (6) and a rotor (15). A cavity is formed inside the housing assembly. The mounting seat (1) is fixedly provided at the bottom of the cavity. The PCB board (2) is arranged inside the mounting seat (1). The motor (3) is adaptively mounted at the upper end of the PCB board (2). The output end of the motor (3) is in transmission connection with the rotor (15). A plurality of inner impellers (4) are evenly distributed along the circumferential direction at the upper end of the rotor (15). The outer periphery of the rotor is connected to the outer impeller (6) through the reinforcing ring (5). An exhaust passage (7) is formed between the outer impeller (6) and the housing assembly.

2. The novel double impeller fan according to claim 1, wherein: The housing assembly includes a lower shell (8), a cover shell (9) and an upper shell (10). The mounting seat (1) is fixedly provided at a non - central position of the lower shell (8). A plurality of through - slots (11) are evenly opened along the periphery of the mounting seat (1) on the lower shell (8). The lower shell (8) and the cover shell (9) are integrally formed. The upper end of the cover shell (9) is fixedly connected to the upper shell (10) by screws. A circular through - hole (12) is opened on the upper shell (10).

3. The novel double - impeller fan according to claim 2, wherein: A permanent magnet sheet (13) is provided between the outside of the motor (3) and the rotor (15).

4. The novel double impeller fan according to claim 3, characterized in that: A central shaft (14) passes through the center of the motor (3). The upper end of the central shaft (14) is fixedly connected to the center of the inner side of the rotor (15).

5. A novel double impeller fan according to claim 4, characterized in that: A clamping groove is provided in the middle of the inner side of the outer impeller (6). One end of the reinforcing ring (5) is clamped into the clamping groove and the other end is fixedly connected to the outer wall of the rotor (15).

6. A novel double impeller fan according to claim 2 or 3, characterized in that: The blades of the outer impeller (6) and the inner impeller (4) face in opposite directions.

7. A novel double-impeller fan according to claim 5, characterized in that: The diameter of the through - hole (12) is larger than the diameter of the rotor (15), and the diameter of the through - hole (12) is smaller than the diameter of the outer impeller (6).

8. A novel double impeller fan according to claim 2, characterized in that: The through - slots (11) are arc - shaped.

Images