Outer rotor centrifugal fan for accelerating air flow

Abstract

The utility model discloses an outer rotor centrifugal fan for accelerating air flow, which is provided with a motor, the motor comprises a motor casing, a motor shaft, a stator iron core arranged on the motor shaft and a rotor magnetic steel combination arranged outside the stator iron core, the motor shaft extends out from two ends of the motor casing, and the rotor magnetic steel combination is arranged outside the stator iron core. A plurality of radial air guide ribs which are convenient for air to enter from two ends of the motor shell and to be centrifuged out from the middle part of the motor shell are arranged outside the motor shell; and an air guide channel is formed between every two adjacent air guide ribs. According to the outer rotor centrifugal fan capable of accelerating air flow, the ventilation and heat dissipation effects of the motor are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to an outer rotor centrifugal fan which accelerates air flow. Background Art

[0002] Centrifugal fans are not only widely used in industrial and civil buildings in the fields of air conditioning, environmental protection, refrigeration, heating, drying, etc., but also have important applications in transportation, mining, metallurgy, energy and other fields. Their main functions are to increase air pressure, flow, form airflow, etc.

[0003] However, the ventilation and heat dissipation effects of the motors in the existing centrifugal fans on the market are not good. After power is turned on, the stator core will heat up. Since the stator core cannot dissipate heat in time, it will cause the stator core to overheat and reduce its life. At the same time, the overheating of the stator core will also cause the bearings to overheat and be damaged. The motor is wrapped by a motor casing, and the outer surface of the existing motor casing is usually smooth, resulting in a slower wind speed at both ends of the motor casing, which in turn leads to a lower working efficiency of the outer rotor centrifugal fan. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to solve the problems existing in the above-mentioned background technology, an outer rotor centrifugal fan which accelerates air flow is provided, which significantly improves the ventilation and heat dissipation effect of the motor.

[0005] The utility model solves the technical problem by adopting the following technical solution: an outer rotor centrifugal fan for accelerating air flow, comprising a motor, wherein the motor comprises a motor housing, a motor shaft, a stator core mounted on the motor shaft, and a rotor magnetic steel assembly mounted outside the stator core, wherein the motor shaft extends from both ends of the motor housing, and the outside of the motor housing is provided with a plurality of radial air guide ribs which facilitate air to enter from both ends of the motor housing at a faster speed and to be centrifuged out from the middle of the motor housing at a faster speed, and an air guide channel is formed between two adjacent air guide ribs.

[0006] To further specifically define, in the above technical solution, the air guiding ribs are long strip-shaped convex ribs, and the air guiding channel is a fan-shaped structure that is narrow inside and wide outside.

[0007] To further specifically define, in the above technical solution, the rotor magnetic steel combination is composed of a rotor ring and a plurality of magnetic steels with different magnetic poles arranged on its inner circumferential wall.

[0008] To further specifically define, in the above technical solution, the motor housing is cast from aluminum alloy material.

[0009] To further specifically define, in the above technical solution, the motor is a brushless DC motor.

[0010] The beneficial effects of the utility model are as follows: the outer rotor centrifugal fan for accelerating air flow provided by the utility model has a plurality of radial air guide ribs arranged on the outside of the motor casing. When the outer rotor centrifugal fan is working, air enters at both ends of the motor casing and centrifugally exits the middle of the motor casing. The arrangement of the air guide ribs increases the air intake velocity at both ends of the motor casing. At the same time, the arrangement of the air guide ribs also increases the effect of centrifugally throwing the wind from the middle of the motor casing, thereby significantly improving the ventilation and heat dissipation effect of the motor and the working efficiency of the outer rotor centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of an outer rotor centrifugal fan for accelerating air flow according to the utility model;

[0013] Figure 2 It is a schematic diagram of the assembly structure of the motor housing and the motor in the outer rotor centrifugal fan;

[0014] Figure 3 It is a schematic diagram of the structure of the motor housing in an outer rotor centrifugal fan;

[0015] Figure 4 This is a front view of the motor housing in an outer rotor centrifugal fan.

[0016] The numbers in the attached drawings are: 1, motor housing; 2, motor shaft; 11, air guide ribs; 12, air guide channel. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the present invention, it should be understood that the terms "one side", "the other side", "both sides", "between", "middle", "upper end", "lower end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The utility model of the outer rotor centrifugal fan for accelerating air flow has a motor, which includes a motor housing 1, a motor shaft 2, a stator core mounted on the motor shaft 2, and a rotor magnetic steel combination mounted outside the stator core. The motor shaft 2 extends from both ends of the motor housing 1. The motor housing 1 is provided with a plurality of radial air guide ribs 11 on the outside to facilitate air to enter from both ends of the motor housing 1 and to be centrifuged out from the middle of the motor housing 1. An air guide channel 12 is formed between two adjacent air guide ribs 11. There are two motors, which are relatively distributed. The two motors share a motor shaft 2. A magnetic field coupling is formed between the stator core and the rotor magnetic steel combination. The magnetic field coupling is a phenomenon in which the current change of a coil generates an induced electromotive force in the adjacent coil.

[0021] Among them, the air guide rib 11 is a long strip convex rib, and the air guide channel 12 is a fan-shaped structure that is narrow inside and wide outside. The rotor magnetic steel combination is composed of a rotor ring and a plurality of magnetic steels with different magnetic poles arranged on its inner circumferential wall. The motor housing 1 is cast from aluminum alloy material. Cast aluminum alloy has the advantages of low density, high specific strength, good corrosion resistance and casting processability, and little restriction on part structure design. The motor is a brushless DC motor. The brushless DC motor consists of a motor body and a driver. It is a typical mechatronics product. A brushless motor refers to a motor without brushes and commutator (or collector ring), also known as a commutatorless motor. The brushless DC motor can be made relatively thin.

[0022] The utility model discloses an outer rotor centrifugal fan for accelerating air flow, by arranging a plurality of radial air guide ribs 11 on the outside of a motor casing 1. When the outer rotor centrifugal fan is working, air enters the two ends of the motor casing 1, and air is centrifugally discharged from the middle of the motor casing 1. The arrangement of the air guide ribs 11 increases the air intake velocity at both ends of the motor casing 1. At the same time, the arrangement of the air guide ribs 11 also increases the effect of centrifugally throwing the wind from the middle of the motor casing 1, thereby significantly improving the ventilation and heat dissipation effect of the motor and the working efficiency of the outer rotor centrifugal fan. In addition, the air guide ribs 11 also play the role of reinforcing ribs, save materials, and can make the entire motor casing 1 thinner.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An outer rotor centrifugal fan for accelerating air flow, characterized in that: A motor is provided, the motor comprising a motor housing (1), a motor shaft (2), a stator core mounted on the motor shaft (2), and a rotor magnet assembly mounted outside the stator core, the motor shaft (2) extending from both ends of the motor housing (1), the motor housing (1) being provided with a plurality of radial air guide ribs (11) on the outside thereof for facilitating air to enter the motor housing (1) from both ends and to be centrifuged out from the middle of the motor housing (1), and an air guide channel (12) being formed between two adjacent air guide ribs (11).

2. The outer rotor centrifugal fan for accelerating air flow according to claim 1, characterized in that: The air guiding ribs (11) are long strip-shaped convex ribs, and the air guiding channel (12) is a fan-shaped structure that is narrow inside and wide outside.

3. The outer rotor centrifugal fan for accelerating air flow according to claim 1, characterized in that: The rotor magnetic steel combination is composed of a rotor ring and a plurality of magnetic steels with different magnetic poles arranged on the inner circumferential wall thereof.

4. The outer rotor centrifugal fan for accelerating air flow according to claim 1, characterized in that: The motor housing (1) is cast from an aluminum alloy material.

5. The outer rotor centrifugal fan for accelerating air flow according to claim 1, characterized in that: The motor is a brushless DC motor.

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