Novel outer rotor fan

Abstract

The novel outer rotor fan comprises a front machine cover and a rear machine cover, an outer rotor motor is arranged between the front machine cover and the rear machine cover, the front face of the front machine cover is fixedly connected with a front machine cover, the middle end of the front machine cover is fixedly connected with a first supporting shaft, and the back face of the rear machine cover is provided with a rear machine cover. The middle end of the rear hood is fixedly connected with a second supporting shaft, and a fan blade mechanism is arranged on the outer side of the outer rotor motor. The supporting rods are arranged between the first fixing ring and the second fixing ring, the limiting pieces at the two ends are inserted into the corresponding limiting grooves to be preliminarily fixed and then thoroughly fixed through the bolts, and the fan blades are stably fixed to the rotor shell of the outer rotor motor, so that the fan blades are convenient to replace, and the number of the supporting rods and the fan blades can be flexibly increased or decreased according to actual requirements to adjust the ventilation quantity. If large air volume is needed, the number is increased, small air volume is reduced, the fan can meet the requirements of different occasions, the fan blades are detachable, the fan is more convenient and rapid to maintain, and the maintenance cost and time are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of external rotor fan equipment, specifically a new type of external rotor fan. Background Technology

[0002] An external rotor fan is a type of fan that uses an external rotor motor to directly drive the impeller. The external rotor fan overturns the traditional motor structure of "stator outside and rotor inside". It places the stator of the motor in the middle and designs the rotor on the outside. The rotor is directly connected to the impeller of the fan. In this way, when the rotor of the motor rotates, it can directly drive the impeller to rotate without the need for an additional transmission device, making the structure more compact.

[0003] External rotor fans are driven by a motor to rotate a rotor, generating airflow. Since the rotor is located outside the casing, the airflow is directly accelerated and guided by the impeller, forming wind with a certain pressure and flow rate, thereby achieving the purpose of exhaust or suction. The number of fan blades in existing external rotor fans is usually fixed, making it difficult to flexibly adjust according to actual usage scenarios. In some situations with different ventilation requirements, such as different seasons or different space loads, it is not convenient to increase or decrease the number of fan blades to match the corresponding ventilation demand, which makes it difficult for the fan to operate efficiently in certain situations and affects its performance. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of external rotor fan to solve the problem that the number of fan blades in existing external rotor fans is usually fixed and difficult to adjust flexibly according to actual use scenarios. In some situations where there are different requirements for ventilation volume, such as different seasons and different space loads, it is not convenient to increase or decrease the number of fan blades to match the corresponding ventilation volume requirements, which makes it difficult for the fan to operate efficiently in certain situations and affects the efficiency of use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel external rotor fan, comprising: a front cover and a rear cover, an external rotor motor disposed between the front cover and the rear cover, a front cover fixedly connected to the front of the front cover, a support shaft one fixedly connected to the middle of the front cover, a rear cover disposed on the back of the rear cover, a support shaft two fixedly connected to the middle of the rear cover, and a fan blade mechanism disposed on the outside of the external rotor motor.

[0006] As a further embodiment of this utility model: a connecting lug 1 is fixedly connected to one end of the outer side of the front hood, and a connecting lug 2 is fixedly connected to one end of the outer side of the rear hood.

[0007] As a further improvement of this utility model: a mounting base is fixedly connected to the other end of the outer side of the front hood, and a mounting base structure is also provided on the other end of the outer side of the rear hood.

[0008] As a further embodiment of this utility model: the fan blade mechanism includes a first fixed ring, a second fixed ring, and a support rod. The first fixed ring is fixedly connected to one end of the outer rotor housing of the outer rotor motor, and the second fixed ring is fixedly connected to the other end of the outer rotor housing of the outer rotor motor. The support rod is located between the first fixed ring and the second fixed ring. A limiting plate and a fan blade are also included. The limiting plate is fixedly connected to one end of the outer side of the support rod, and the fan blade is fixedly connected to the middle end of the outer side of the support rod. A through hole, a limiting groove, and a bolt are also included. The through hole is located at one end of the back side of the second fixed ring, the limiting groove is located at one end of the front side of the second fixed ring, and the bolt is located at the other end of the back side of the second fixed ring.

[0009] As a further embodiment of this utility model: the front cover and the rear cover are movably connected, and both the first support shaft and the second support shaft are movably connected to the outer rotor motor.

[0010] As a further embodiment of this utility model: the back of the fixing ring is also provided with a through hole and a bolt structure, and the front of the fixing ring is also provided with a limiting groove structure. The through hole and the limiting groove are connected through each other, and the bolt and the support rod are threaded together.

[0011] As a further improvement of this utility model: the number of the support rod, the fan blade, the through hole, the limiting groove and the bolt are all provided in multiple sets, and the outer side of each set of the support rod is provided with two sets of limiting plates, and the limiting plates are adapted to the limiting groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, the support rod is placed between the first and second fixed rings, and the limiting plates at both ends are inserted into the corresponding limiting slots for initial fixation, and then completely fixed with bolts, so that the fan blades are firmly attached to the outer rotor motor rotor housing. This facilitates the replacement of the fan blades, and the ventilation volume can be adjusted by flexibly increasing or decreasing the number of support rods and fan blades according to actual needs. If a large air volume is required, the number can be increased, and if a small air volume is required, the number can be decreased, which can adapt to different occasions. The fan blades are also detachable, making the fan maintenance more convenient and quick, reducing maintenance costs and time. The connection between the first and second support shafts and the outer rotor motor, as well as the movable plug-in combination of the front and rear covers, facilitates the external assembly and disassembly of the fan, which is beneficial for maintenance and repair. The first and second connecting lugs can be used to completely fix the front and rear covers with fasteners. The mounting base also provides more ways and positions for fan installation, which can adapt to different installation environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2This is a schematic diagram of the front hood structure in this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the rear cover in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the foreign rotor motor in this utility model;

[0018] Figure 5 This is a schematic diagram of the fan blade mechanism in this utility model.

[0019] In the diagram: 1. Front cover; 2. Rear cover; 3. External rotor motor; 4. Front cover; 5. Support shaft one; 6. Rear cover; 7. Support shaft two; 8. Fan blade mechanism; 801. Fixing ring one; 802. Fixing ring two; 803. Support rod; 804. Limiting plate; 805. Fan blade; 806. Through hole; 807. Limiting groove; 808. Bolt; 9. Connecting lug one; 10. Connecting lug two; 11. Mounting base. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0022] Reference Figures 1 to 5 In this embodiment of the utility model, a novel external rotor fan includes: a front cover 1 and a rear cover 2, which together form the outer shell of the fan and provide protection for the internal structure. An external rotor motor 3 is provided between the front cover 1 and the rear cover 2 as the power source of the fan.

[0023] The front cover 1 is fixedly connected to the front cover 4, and the middle of the front cover 4 is fixedly connected to the support shaft 1 5. The rear cover 2 is provided with the rear cover 6. The front cover 4 and the rear cover 6 mainly serve the functions of heat dissipation, ventilation and air circulation. The middle of the rear cover 6 is fixedly connected to the support shaft 2 7. The support shaft 1 5 and the support shaft 2 7 provide certain support for the external rotor motor 3.

[0024] The outer rotor motor 3 is provided with a fan blade mechanism 8, which can replace the blades. The front cover 1 and the rear cover 2 are movably connected. The first support shaft 5 and the second support shaft 7 are both movably connected to the outer rotor motor 3.

[0025] Reference Figures 1 to 3 A connecting lug 1 9 is fixedly connected to one end of the outer side of the front cover 1, and a connecting lug 2 10 is fixedly connected to one end of the outer side of the rear cover 2. A mounting base 11 is fixedly connected to the other end of the outer side of the front cover 1, and a mounting base 11 structure is also provided on the other end of the outer side of the rear cover 2. Through the connecting lug 1 9 and the connecting lug 2 10, the front cover 1 and the rear cover 2 can be completely fixed with fasteners. The design of the mounting base 11 also provides more ways and positions for the installation of the fan, which can adapt to different installation environments and needs.

[0026] Reference Figure 1 , Figure 4 and Figure 5 The fan blade mechanism 8 includes a first fixed ring 801, a second fixed ring 802, and a support rod 803. The first fixed ring 801 is fixedly connected to one end of the rotor housing of the outer rotor motor 3, the second fixed ring 802 is fixedly connected to the other end of the rotor housing of the outer rotor motor 3, and the support rod 803 is located between the first fixed ring 801 and the second fixed ring 802.

[0027] The limiting piece 804 and the fan blade 805 are fixedly connected to one end of the outer side of the support rod 803, and the fan blade 805 is fixedly connected to the middle end of the outer side of the support rod 803.

[0028] The device includes a through hole 806, a limiting groove 807, and a bolt 808. The through hole 806 is located at one end of the back of the second fixing ring 802, the limiting groove 807 is located at one end of the front of the second fixing ring 802, and the bolt 808 is located at the other end of the back of the second fixing ring 802. The first fixing ring 801 also has a through hole 806 and a bolt 808 on its back, and a limiting groove 807 on its front. The through hole 806 and the limiting groove 807 are connected. The bolt 808 is threadedly connected to the support rod 803. The number of support rods 803, fan blades 805, through holes 806, limiting grooves 807, and bolts 808 are all [not specified]. Multiple sets are provided, and each set of support rods 803 has two sets of limiting plates 804 on the outside. The limiting plates 804 are adapted to the limiting grooves 807. The support rod 803 is placed between the first fixing ring 801 and the second fixing ring 802, so that the limiting plates 804 at both ends of the support rod 803 are inserted into the limiting grooves 807 on the first fixing ring 801 and the second fixing ring 802 respectively, to initially fix the support rod 803. Then, the two ends of the support rod 803 are completely fixed to the first fixing ring 801 and the second fixing ring 802 respectively using bolts 808. In this way, the fan blade 805 can be firmly attached to the rotor housing of the external rotor motor 3, which facilitates the replacement of the fan blade 805.

[0029] The working principle of this utility model is as follows: In use, the support rod 803 is placed between the first fixing ring 801 and the second fixing ring 802, so that the limiting pieces 804 at both ends of the support rod 803 are inserted into the limiting grooves 807 on the first fixing ring 801 and the second fixing ring 802 respectively, to initially fix the support rod 803. Then, the two ends of the support rod 803 are completely fixed to the first fixing ring 801 and the second fixing ring 802 respectively using bolts 808. In this way, the fan blade 805 can be stably attached to the rotor housing of the external rotor motor 3. This method not only facilitates the replacement of the fan blade 805, but also allows for flexible increase or decrease in the number of support rods 803 and fan blades 805 according to actual usage needs, thereby adjusting the number of fan blades 805. For example, in situations requiring a larger ventilation volume, more support rods and fan blades can be added. The number of blades can be reduced, and in situations requiring smaller ventilation volumes, the number of support rods and fan blades can be decreased. This flexibility allows the fan to adapt to different usage scenarios and needs. The detachable design of the fan blades 805 makes fan maintenance more convenient and quick, reducing maintenance costs and time. The connection between the support shaft 1 5 and the support shaft 2 7 and the external rotor motor 3, as well as the front cover 1 and the rear cover 2, are combined by a movable plug-in method. This method facilitates the external assembly and disassembly of the fan, making subsequent maintenance and repair work easier. The front cover 1 and the rear cover 2 can be completely fixed with fasteners by connecting lug 1 9 and connecting lug 2 10. The design of the mounting base 11 also provides more ways and positions for fan installation, which can adapt to different installation environments and needs.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel external rotor fan, characterized in that, include: A front cover (1) and a rear cover (2) are provided. An external rotor motor (3) is provided between the front cover (1) and the rear cover (2). A front cover (4) is fixedly connected to the front of the front cover (1). A support shaft (5) is fixedly connected to the middle of the front cover (4). A rear cover (6) is provided on the back of the rear cover (2). A support shaft (7) is fixedly connected to the middle of the rear cover (6). A fan blade mechanism (8) is provided on the outside of the external rotor motor (3). The fan blade mechanism (8) includes: Fixed ring one (801), fixed ring two (802) and support rod (803), the fixed ring one (801) is fixedly connected to one end of the rotor housing of the external rotor motor (3), the fixed ring two (802) is fixedly connected to the other end of the rotor housing of the external rotor motor (3), and the support rod (803) is located between the fixed ring one (801) and the fixed ring two (802); The limiting piece (804) and the fan blade (805) are fixedly connected to one end of the outer side of the support rod (803), and the fan blade (805) is fixedly connected to the middle end of the outer side of the support rod (803). Through hole (806), limiting groove (807) and bolt (808), the through hole (806) is opened at one end of the back of the second fixing ring (802), the limiting groove (807) is opened at one end of the front of the second fixing ring (802), and the bolt (808) is set at the other end of the back of the second fixing ring (802).

2. The novel external rotor fan according to claim 1, characterized in that, A connecting lug 1 (9) is fixedly connected to one end of the outer side of the front hood (1), and a connecting lug 2 (10) is fixedly connected to one end of the outer side of the rear hood (2).

3. A novel external rotor fan according to claim 1, characterized in that, The other end of the front hood (1) is fixedly connected to a mounting base (11), and the other end of the rear hood (2) is also provided with a mounting base (11) structure.

4. A novel external rotor fan according to claim 1, characterized in that, The front cover (1) and the rear cover (2) are movably connected, and the first support shaft (5) and the second support shaft (7) are both movably connected to the outer rotor motor (3).

5. A novel external rotor fan according to claim 1, characterized in that, The back of the fixing ring (801) is also provided with a through hole (806) and a bolt (808) structure, and the front of the fixing ring (801) is also provided with a limiting groove (807) structure. The through hole (806) and the limiting groove (807) are connected through each other, and the bolt (808) and the support rod (803) are threaded together.

6. A novel external rotor fan according to claim 1, characterized in that, The number of the support rod (803), the fan blade (805), the through hole (806), the limiting groove (807) and the bolt (808) are all provided in multiple sets. Each set of the support rod (803) has two sets of limiting plates (804) on its outer side, and the limiting plates (804) are adapted to the limiting groove (807).

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