Fan and extractor hood

Abstract

The utility model provides a fan and range hood, including volute, outer rotor motor and support component, volute is enclosed and is formed with installation cavity, outer rotor motor is located at least partly in the installation cavity, and outer rotor motor has central shaft and outer rotor, central shaft is worn in the outer rotor, and the one end of central shaft passes through the outer rotor and forms the protruding shaft section outside the outer rotor, support component has first support and second support, first support is connected between protruding shaft section and second support, second support is connected between protruding shaft section and volute, and the connecting point of protruding shaft section and first support, second support does not coincide. In the utility model, need not to set up support component on both sides of volute, reduce volute air inlet's shelter, has guaranteed fan air intake efficiency, and support component provides two section type support, avoids the eccentricity phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of kitchenware technology, specifically to a fan and a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. It can quickly remove the exhaust gas produced by the stove and the oil fumes generated during cooking and exhaust them outdoors, thereby purifying the kitchen environment.

[0003] Currently, external rotor motors are widely used in range hoods due to their compact structure and stable torque output. However, traditional external rotor motors typically employ a double-sided support structure, where the motor shaft is fixed to both sides of the volute via brackets. While this ensures motor stability, it requires space on both sides of the volute for the brackets, resulting in the brackets obstructing the air intake side of the volute and reducing air intake efficiency. Some existing external rotor motors also use a single-sided fixing structure. While this reduces the obstruction of the air intake side of the volute by the brackets, the bracket and motor shaft are supported at a single point, resulting in insufficient mechanical stability. This can lead to shaft misalignment or vibration during high-speed motor operation, thereby increasing the noise of the range hood. Utility Model Content

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, a fan is provided, the technical solution of which is as follows.

[0005] The fan includes a volute, an external rotor motor, and a support assembly. The volute encloses a mounting cavity. The external rotor motor is at least partially located within the mounting cavity and has a central shaft and an external rotating body. The central shaft passes through the external rotating body, and one end of the central shaft passes through the external rotating body to form an extended shaft section outside the external rotating body. The support assembly has a first support and a second support. The first support is connected between the extended shaft section and the second support, and the second support is connected between the extended shaft section and the volute. The connection points of the extended shaft section and the first and second supports do not coincide.

[0006] The fan of this utility model features an extended shaft section at one end of the central shaft of the external rotor motor. The support assembly includes a first support and a second support, which are respectively connected to the extended shaft section. This allows the external rotor motor to be fixed on one side, eliminating the need for support assemblies on both sides of the volute. This reduces the obstruction of the air inlet of the volute by the support assemblies, effectively ensuring the air intake efficiency of the fan. Furthermore, the connection points between the extended shaft section and the first and second supports do not coincide. The first and second supports provide two-stage support for the extended shaft section of the external rotor motor, achieving two-stage fixation on one side of the external rotor motor. This not only disperses the force on the external rotor motor, preventing eccentricity during operation, but also improves the support rigidity and vibration resistance, and reduces fan noise. When the fan is applied to a range hood, it improves the smoke extraction effect and reduces the noise of the range hood.

[0007] For example, the first bracket has a first connecting portion at the end away from the second bracket, and the second bracket has a second connecting portion at the end away from the volute. The extended shaft section has a first end and a second end, with the second end being farther away from the outer rotor than the first end. The first end is connected to the first connecting portion, and the second end is connected to the second connecting portion; or, the first end is connected to the second connecting portion, and the second end is connected to the first connecting portion. This configuration provides two-stage support for the extended shaft section of the outer rotor motor, achieving two-stage fixation on one side of the outer rotor motor. This not only disperses the force on the outer rotor motor, preventing eccentricity during operation, but also improves support rigidity and vibration resistance, and reduces fan noise. When the fan is used in a range hood, it improves the smoke extraction effect and reduces noise.

[0008] For example, the first support includes at least two support frames, which are spaced apart circumferentially in the first connecting portion to form a claw-like structure. This arrangement allows vibrations experienced by the first connecting portion to be dispersed and evenly transmitted to the second support through the at least two support frames, preventing structural damage to the first support due to concentrated stress, improving its load-bearing capacity and stability, and offering a simple structure with low manufacturing cost and difficulty.

[0009] For example, the first connecting portion is provided with a first through hole, and the first connecting portion forms a first straight limiting portion at the wall of the first through hole. The extended shaft section has a straight mating portion that abuts against the first straight limiting portion. With this configuration, the cooperation between the first straight limiting portion and the straight mating portion not only improves the connection strength between the extended shaft section and the first bracket, but also prevents accidental rotation of the extended shaft section, ensuring the stability of the external rotor motor operation.

[0010] For example, the first connecting portion includes a first plate portion and a first boss portion protruding from the first plate portion, with a first through hole penetrating the first boss portion and the first plate portion. This configuration allows a hollow cavity to be formed within the first boss portion. When the protruding shaft section passes through the first plate portion, the inner wall surface of the hollow cavity can fit against the outer wall surface of the protruding shaft section, thereby increasing the contact area between the first support and the protruding shaft section, and further enhancing the connection strength between the first support and the protruding shaft section.

[0011] For example, the support frame is connected to the outer edge of the first plate, and the support frame and the first boss are located on opposite sides of the first plate. This arrangement not only strengthens the structural strength of the first bracket, but also enables the bracket assembly to provide two-stage support for the extended shaft section of the external rotor motor, achieving two-stage fixation on one side of the external rotor motor.

[0012] For example, a foot is formed at the end of the support frame away from the first plate, and the foot is connected to the second bracket. This arrangement not only strengthens the structural strength of the first bracket but also ensures the stability of the connection between the first and second brackets, thereby enhancing the strength of the support assembly.

[0013] For example, the foot makes surface contact with the second bracket. This arrangement increases the contact area between the first and second brackets, enhancing the stability of the connection between them.

[0014] For example, the second support includes at least two connecting frames, which are spaced apart circumferentially from the second connecting portion, and each connecting frame extends radially outward from the outer edge of the second connecting portion; or each connecting frame extends by bending from the outer edge of the second connecting portion. This arrangement allows vibrations experienced by the second connecting portion to be dispersed and evenly transmitted to the connected components via the at least two connecting frames, preventing structural damage to the second support due to concentrated stress, improving its load-bearing capacity and stability, and offering a simple structure with low manufacturing cost and difficulty.

[0015] For example, the second connecting portion is provided with a second through hole, and the second connecting portion forms a second straight limiting portion at the hole wall of the second through hole. The protruding shaft section has a straight mating portion that abuts against the second straight limiting portion. With this configuration, the cooperation between the second straight limiting portion and the straight mating portion not only improves the connection strength between the protruding shaft section and the second bracket, but also prevents accidental rotation of the protruding shaft section, ensuring the stability of the external rotor motor operation.

[0016] For example, the second connecting portion includes a second plate portion and a second boss portion protruding from the second plate portion, with a second through hole penetrating through the second boss portion and the second plate portion. This configuration allows a hollow cavity to be formed within the second boss portion. When the protruding shaft section passes through the second plate portion, the inner wall surface of the hollow cavity can fit against the outer wall surface of the protruding shaft section, thereby increasing the contact area between the second bracket and the protruding shaft section, and thus enhancing the connection strength between the second bracket and the protruding shaft section.

[0017] For example, a fastener is connected to the second end, and the second connection portion has an outer side away from the first bracket, with the fastener abutting against the outer side. This configuration further avoids vibrations generated by the external rotor motor during operation or accidental bracket detachment due to external forces, effectively improving the reliability and safety of the air handling unit assembly.

[0018] For example, the volute has an air inlet with a guide ring at the inlet, and the second bracket is connected to the volute via the guide ring. This configuration enhances overall stability through the rigid connection between the guide ring and the volute, and the bracket assembly, guide ring, and volute form a linked support to further enhance overall integrity.

[0019] For example, the air guide ring has an annular body, and a plate-shaped portion is formed at the end of the second bracket away from the second connecting portion, with the plate-shaped portion forming surface contact with the annular body. This arrangement not only enhances the structural strength of the second bracket but also increases the contact area between the second bracket and the air guide ring, thereby enhancing the connection strength between the second bracket and the air guide ring.

[0020] According to another aspect of this utility model, a range hood is provided, which includes a housing and a fan as described above. The housing encloses a receiving cavity, and the fan is located within the receiving cavity. Since the range hood of this utility model includes the fan described above, and because the fan has the aforementioned beneficial effects, the range hood including the fan described above will necessarily also have the aforementioned beneficial effects.

[0021] This utility model description introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0022] The advantages and features of this utility model will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0023] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the drawings,

[0024] Figure 1 A front view of a fan, which is an exemplary embodiment of the present invention;

[0025] Figure 2 for Figure 1 The cross-sectional view of the fan shown;

[0026] Figure 3 for Figure 1 The diagram shows a three-dimensional view of the assembled bracket assembly and air guide ring.

[0027] Figure 4 for Figure 3 Exploded view of the support assembly and air guide ring shown;

[0028] Figure 5 for Figure 4 A three-dimensional view of the first support shown;

[0029] Figure 6 for Figure 4 A three-dimensional view of the air guide ring shown;

[0030] Figure 7 for Figure 4 A three-dimensional view of the second support shown;

[0031] Figure 8 for Figure 1 A 3D view of the external rotor motor shown;

[0032] Figure 9 for Figure 8 The top view of the external rotor motor shown;

[0033] Figure 10 A perspective view of a fan, which is another exemplary embodiment of the present invention;

[0034] Figure 11 for Figure 10 The cross-sectional view of the fan shown;

[0035] Figure 12 for Figure 10 The diagram shows a three-dimensional view of the assembled bracket assembly and air guide ring.

[0036] Figure 13 for Figure 10 The second support shown is a three-dimensional view.

[0037] The above figures include the following reference numerals:

[0038] 1. Fan; 10. Volute; 110. Mounting cavity; 120. Air inlet; 130. Enclosure; 140. Side plate; 20. External rotor motor; 210. Central shaft; 211. Extended shaft section; 2111. First end; 2112. Second end; 2113. First straight mating part; 2113a. First mating surface; 2113b. Second mating surface; 2114. Second straight mating part; 2114a. Third mating surface; 2114b. Fourth mating surface; 220. External rotating body; 30. Support assembly; 310. First support; 311. First connecting part; 31 11. First through hole; 3112. First straight limiting part; 3113. First plate part; 3114. First boss part; 312. Support frame body; 313. Foot part; 320. Second bracket; 321. Second connecting part; 3211. Second through hole; 3212. Second straight limiting part; 3213. Second plate part; 3214. Second boss part; 322. Connecting frame body; 323. Plate-shaped part; 40. Fastener; 50. Air guide ring; 501. Outer ring part; 502. Inner ring part; 510. Annular body; 511. Air guide part; 512. Mounting part. Detailed Implementation

[0039] In the following description, numerous details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, which may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well-known in the art have not been described in detail.

[0040] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0041] This utility model provides a fan. The fan of this utility model can be applied to range hoods. The fan of this utility model includes, but is not limited to, single-sided air intake fans and double-sided air intake fans. The following will describe in detail one type of fan according to an embodiment of this utility model with reference to the accompanying drawings.

[0042] See also Figures 1 to 13The fan 1 may include a volute 10, an external rotor motor 20, and a support assembly 30. The volute 10 may enclose a mounting cavity 110. The external rotor motor 20 may be at least partially located within the mounting cavity 110, and the external rotor motor 20 may have a central shaft 210 and an external rotating body 220. The central shaft 210 may pass through the external rotating body 220, and one end of the central shaft 210 may pass through the external rotating body 220 to form an extended shaft section 211 outside the external rotating body 220. The support assembly 30 may have a first support 310 and a second support 320. The first support 310 may be connected between the extended shaft section 211 and the second support 320. The second support 320 may be connected between the extended shaft section 211 and the volute 10, and the connection points of the extended shaft section 211 and the first support 310 and the second support 320 do not coincide. Specifically, the volute 10 may have a surrounding plate 130 and two side plates 140, which together form a mounting cavity 110. The second bracket 320 may be connected between the protruding shaft section 211 and one of the side plates 140. It should be noted that the second bracket 320 may be connected to the side of the side plate 140 near the mounting cavity 110, or it may be connected to the side of the side plate 140 away from the mounting cavity 110.

[0043] The fan 1 of this utility model has an extended shaft section 211 formed at one end of the central shaft 210 of the external rotor motor 20. The support assembly 30 has a first support 310 and a second support 320, which are respectively connected to the extended shaft section 211. Thus, the external rotor motor 20 is fixed on one side, eliminating the need to set support assemblies 30 on both sides of the volute 10. This reduces the obstruction of the air inlet 120 of the volute 10 by the support assembly 30, effectively ensuring the air intake efficiency of the fan 1. Furthermore, the extended shaft section 211 and the first support 320 are connected to the extended shaft section 211. The connection points of the first bracket 310 and the second bracket 320 do not coincide. The first bracket 310 and the second bracket 320 provide two-stage support for the extended shaft section 211 of the external rotor motor 20, realizing two-stage fixation on one side of the external rotor motor 20. This not only disperses the force on the external rotor motor 20 and avoids the phenomenon of eccentricity of the external rotor motor 20 during operation, but also improves the support rigidity and vibration resistance, and reduces the noise of the fan 1. When the fan 1 is applied to the range hood, it improves the smoke extraction effect of the range hood and reduces the noise of the range hood.

[0044] In one embodiment of this utility model, in conjunction with reference to Figure 2 , Figure 3 and Figure 8The first support 310 and the second support 320 can be vertically stacked to form a tower-shaped support assembly 30, allowing the support assembly 30 to form a multi-level force transmission path. The connection point between the first support 310 and the extended shaft section 211 forms the first-level fixed support, and the connection point between the second support 320 and the extended shaft section 211 forms the second-level fixed support. Utilizing the lever principle, this ensures the stability of the external rotor motor 20 during operation and disperses the force on the extended shaft section 211 in both directions, avoiding force concentration on the extended shaft section 211. The first support 310 and the second support 320 can be pre-assembled to form a pre-assembled support assembly 30, simplifying the assembly process and reducing coaxiality errors. Of course, the connection between the first support 310 and the second support 320 can also form other shapes of support assemblies 30, as long as the connection points between the extended shaft section 211 and the first support 310 and the second support 320 do not coincide.

[0045] In one embodiment of this utility model, the number of first brackets 310 can be one, and the number of second brackets 320 can be one, which saves costs and facilitates manufacturing. Of course, it is not excluded that the number of first brackets 310 and the number of second brackets 320 can be two or more, which further enhances the stability of the connection between the bracket assembly 30 and the bracket of the protruding shaft section 211.

[0046] See also Figure 2 , Figure 3 and Figure 8 The end of the first support 310 away from the second support 320 may have a first connecting portion 311. The end of the second support 320 away from the volute 10 may have a second connecting portion 321. The extended shaft section 211 may have a first end 2111 and a second end 2112. The second end 2112 may be further away from the outer rotor 220 than the first end 2111. The first end 2111 may be connected to the first connecting portion 311. The second end 2112 may be connected to the second connecting portion 321. In this way, the first connecting portion 311 and the second connecting portion 321 provide two-stage support for the extended shaft section 211 of the outer rotor motor 20, realizing two-stage fixation on one side of the outer rotor motor 20. This not only disperses the force on the outer rotor motor 20 and avoids eccentricity during operation, but also improves the support rigidity and vibration resistance, and reduces the noise of the fan 1. When the fan 1 is used in a range hood, it improves the smoke extraction effect of the range hood and reduces the noise of the range hood.

[0047] See also Figures 10 to 13The end of the first bracket 310 away from the second bracket 320 may have a first connecting portion 311. The end of the second bracket 320 away from the volute 10 may have a second connecting portion 321. The extended shaft section 211 may have a first end 2111 and a second end 2112. The second end 2112 may be further away from the outer rotor 220 than the first end 2111. The first end 2111 may be connected to the second connecting portion 321. The second end 2112 may be connected to the first connecting portion 311. In this way, the first connecting portion 311 and the second connecting portion 321 provide two-stage support for the extended shaft section 211 of the outer rotor motor 20, realizing two-stage fixation on one side of the outer rotor motor 20. This not only disperses the force on the outer rotor motor 20 and avoids eccentricity during operation, but also improves the support stiffness and vibration resistance, and reduces the noise of the fan 1. When the fan 1 is used in a range hood, it improves the smoke extraction effect of the range hood and reduces the noise of the range hood.

[0048] See also Figure 3 , Figure 4 , Figure 5 and Figure 12 The first support 310 may include at least two support frames 312, such as two, three, or four support frames 312. Understandably, the number of support frames 312 is related to support stability and air intake efficiency; for example, more support frames 312 result in higher support stability but lower air intake efficiency. At least two support frames 312 may be spaced apart circumferentially around the first connecting portion 311 to form a claw-like structure. Thus, the vibrations received by the first connecting portion 311 can be dispersed and evenly transmitted to the second support 320 via the at least two support frames 312, avoiding structural damage to the first support 310 due to concentrated stress, improving the load-bearing capacity and stability of the first support 310, and resulting in a simple structure with low manufacturing cost and difficulty. Furthermore, reinforcing ribs may be provided on the support frames 312 to enhance their structural strength.

[0049] In one embodiment of this utility model, see again with reference to Figure 3 , Figure 4 , Figure 5 and Figure 12 The first support 310 may include three support frames 312, which are spaced apart circumferentially around the first connecting portion 311 to form a claw-like structure. In this way, the vibrations received by the first connecting portion 311 can be dispersed and evenly transmitted to the second support 320 through the three support frames 312, avoiding structural damage to the first support 310 due to concentrated stress, improving the load-bearing capacity and stability of the first support 310, and having a simple structure with low manufacturing cost and difficulty.

[0050] In some embodiments, the first support 310 may include a support frame 312, which extends around the periphery of the first connecting portion 311 to form a bowl-shaped structure. This enhances the structural strength of the first support 310, and the support frame 312 can disperse and evenly transmit the vibrations received by the first connecting portion 311 to the second support 320.

[0051] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 11 and Figure 12 The first connecting portion 311 may be provided with a first through hole 3111, and a first straight limiting portion 3112 may be formed on the wall of the first through hole 3111. The protruding shaft segment 211 may have a straight mating portion that abuts against the first straight limiting portion 3112. The number of first straight limiting portions 3112 may be one, two, or more, and the number of straight mating portions may correspond to the number of first straight limiting portions 3112. It should be noted that the more first straight limiting portions 3112 and straight mating portions there are, the better the effect of restricting the circumferential rotation of the protruding shaft segment 211. Thus, through the cooperation between the first straight limiting portion 3112 and the straight mating portion, not only can the connection strength between the protruding shaft segment 211 and the first bracket 310 be improved, but also the accidental rotation of the protruding shaft segment 211 can be prevented, ensuring the stability of the operation of the external rotor motor 20.

[0052] Specifically, the straight mating portion may include a first straight mating portion 2113 and a second straight mating portion 2114. When the first connecting portion 311 is connected to the first end 2111, the first connecting portion 311 is limited to the first end 2111 by the first straight mating portion 2113. When the first connecting portion 311 is connected to the second end 2112, the first connecting portion 311 is limited to the second end 2112 by the second straight mating portion 2114. Further, the first straight mating portion 2113 may have a first mating surface 2113a and a second mating surface 2113b, the first mating surface 2113a and the second mating surface 2113b may be perpendicular to each other, and the first mating surface 2113a may extend from the second end 2112 to the first end 2111. When the first connecting portion 311 is connected to the first end 2111, the first mating surface 2113a abuts against the first straight limiting portion 3112, and the second mating surface 2113b abuts against the end face of the first connecting portion 311 away from the second bracket 320. The second straight mating portion 2114 may have a third mating surface 2114a and a fourth mating surface 2114b, which may be perpendicular to each other, with the fourth mating surface 2114b being closer to the second end 2112 than the second mating surface 2113b. When the first connecting portion 311 is connected to the second end 2112, the third mating surface 2114a abuts against the first straight limiting portion 3112, and the fourth mating surface 2114b abuts against the end face of the first connecting portion 311 near the second bracket 320. The number of first straight mating parts 2113 and second straight mating parts 2114 can be multiple, and the multiple first straight mating parts 2113 and multiple second straight mating parts 2114 can be arranged in a staggered manner around the protruding shaft section 211. In this way, not only can the accidental rotation of the protruding shaft section 211 be avoided, but the axial stability of the protruding shaft section 211 can also be enhanced, ensuring the stability of the operation of the external rotor motor 20.

[0053] See again Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 11 and Figure 12The first connecting portion 311 may include a first plate portion 3113 and a first boss portion 3114 protruding from the first plate portion 3113. A first through hole 3111 can penetrate the first boss portion 3114 and the first plate portion 3113. The first through hole 3111 can be interference-fitted with the protruding shaft section 211. Understandably, the inner contour of the first through hole 3111 can be adapted to the outer contour of the protruding shaft section 211 so that the protruding shaft section 211 can be securely inserted into the first through hole 3111. In this way, a hollow cavity can be formed in the first boss portion 3114. When the protruding shaft section 211 passes through the first plate portion 3113, the inner wall surface of the hollow cavity can fit against the outer wall surface of the protruding shaft section 211, thereby increasing the contact area between the first support 310 and the protruding shaft section 211, and thus enhancing the connection strength between the first support 310 and the protruding shaft section 211.

[0054] See again Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 11 and Figure 12 The support frame 312 can be connected to the outer edge of the first plate portion 3113, and the support frame 312 and the first boss portion 3114 can be located on opposite sides of the first plate portion 3113. It should be noted that the distance between the first connecting portion 311 and the second connecting portion 321 is related to the length of the support frame 312. The longer the support frame 312, the longer the distance between the first connecting portion 311 and the second connecting portion 321 can be, and the better the stability of the support assembly 30 in supporting the extended shaft section 211. In this way, not only is the structural strength of the first support 310 strengthened, but the support assembly 30 can also provide two-stage support for the extended shaft section 211 of the external rotor motor 20, achieving single-sided two-stage fixation of the external rotor motor 20.

[0055] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 11 and Figure 12 The end of the support frame 312 away from the first plate portion 3113 may have a foot 313. The foot 313 may be connected to the second bracket 320. In this way, not only is the structural strength of the first bracket 310 strengthened, but the stability of the connection between the first bracket 310 and the second bracket 320 is also ensured, thereby enhancing the strength of the bracket assembly 30.

[0056] See again Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 11 and Figure 12 The foot 313 can form a surface contact with the second bracket 320. This increases the contact area between the first bracket 310 and the second bracket 320, enhancing the stability of the connection between them.

[0057] In one embodiment of this utility model, see again in conjunction with the reference. Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 11 and Figure 12 The foot 313 and the second bracket 320 can be connected by a fastening structure. This facilitates installation or disassembly, thereby facilitating cleaning or maintenance. Of course, the foot 313 and the second bracket 320 can also be connected by welding or snap-fit ​​connections to ensure the stability of the connection between the first bracket 310 and the second bracket 320.

[0058] See also Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 The second support 320 may include at least two connecting frames 322, such as two, three, or four connecting frames 322. Understandably, the number of connecting frames 322 is related to support stability and air intake efficiency; for example, a higher number of connecting frames 322 results in higher support stability but lower air intake efficiency. At least two connecting frames 322 may be spaced apart circumferentially on the second connecting portion 321, and each connecting frame 322 may extend radially outward from the outer edge of the second connecting portion 321. It should be noted that the number of support frames 312 may correspond to the number of connecting frames 322 to ensure support stability and air intake efficiency, and to facilitate manufacturing. In some embodiments, the support frames 312 and connecting frames 322 correspond one-to-one, and the feet 313 may be connected to the corresponding connecting frames 322 to enhance the structural strength of the connecting frames 322. In this way, the vibrations received by the second connecting part 321 can be dispersed and evenly transmitted to the connected components (such as the volute 10 or the air guide ring 50) through at least two connecting frames 322, avoiding structural damage to the second support 320 due to concentrated stress, improving the load-bearing capacity and stability of the second support 320, and with a simple structure, low manufacturing cost and difficulty. Furthermore, reinforcing ribs can be provided on the connecting frames 322 to enhance the structural strength of the connecting frames 322.

[0059] See also Figure 11 , Figure 12 and Figure 13The second support 320 may include at least two connecting frames 322, which are spaced apart circumferentially around the second connecting portion 321, with each connecting frame 322 extending from the outer edge of the second connecting portion 321. In this way, the vibrations experienced by the second connecting portion 321 can be dispersed and evenly transmitted to the connected components (such as the volute 10 or the air guide ring 50) through the at least two connecting frames 322, avoiding structural damage to the second support 320 due to concentrated stress, improving the load-bearing capacity and stability of the second support 320, and offering a simple structure with low manufacturing cost and difficulty. Furthermore, reinforcing ribs may be provided on the connecting frames 322 to enhance their structural strength.

[0060] In one embodiment of this utility model, in conjunction with reference to Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 11 , Figure 12 and Figure 13 The second support 320 may include three connecting frames 322, which are spaced apart circumferentially around the second connecting portion 321, and each connecting frame 322 extends radially outward from the outer edge of the second connecting portion 321. In this way, the vibrations received by the second connecting portion 321 can be dispersed and evenly transmitted to the connected components (such as the volute 10 or the air guide ring 50), avoiding structural damage to the second support 320 due to concentrated stress, improving the load-bearing capacity and stability of the second support 320, and having a simple structure with low manufacturing cost and difficulty.

[0061] See again Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 11 , Figure 12 and Figure 13The second connecting portion 321 may be provided with a second through hole 3211, and a second straight limiting portion 3212 may be formed on the wall of the second through hole 3211. The second end 2112 may have a straight mating portion that abuts against the second straight limiting portion 3212. The number of second straight limiting portions 3212 may be one, two, or more, and the number of straight mating portions may correspond to the number of second straight limiting portions 3212. It should be noted that the more second straight limiting portions 3212 and straight mating portions there are, the better the effect of restricting the circumferential rotation of the protruding shaft segment 211. Thus, through the cooperation between the second straight limiting portion 3212 and the second straight mating portion 2114, not only can the connection strength between the protruding shaft segment 211 and the second bracket 320 be improved, but also the accidental rotation of the protruding shaft segment 211 can be prevented, ensuring the stability of the operation of the external rotor motor 20.

[0062] Specifically, the straight mating portion may include a first straight mating portion 2113 and a second straight mating portion 2114. When the second connecting portion 321 is connected to the first end 2111, the second connecting portion 321 is limited to the first end 2111 by the first straight mating portion 2113. When the second connecting portion 321 is connected to the second end 2112, the second connecting portion 321 is limited to the second end 2112 by the second straight mating portion 2114. Further, the first straight mating portion 2113 may have a first mating surface 2113a and a second mating surface 2113b, the first mating surface 2113a and the second mating surface 2113b may be perpendicular to each other, and the first mating surface 2113a may extend from the second end 2112 to the first end 2111. When the second connecting portion 321 is connected to the first end 2111, the first mating surface 2113a abuts against the second straight limiting portion 3212, and the second mating surface 2113b abuts against the end face of the second connecting portion 321 away from the first bracket 310. The second straight mating portion 2114 may have a third mating surface 2114a and a fourth mating surface 2114b, which may be perpendicular to each other. The fourth mating surface 2114b is closer to the second end 2112 than the second mating surface 2113b. The third mating surface 2114a abuts against the second straight limiting portion 3212, and the fourth mating surface 2114b abuts against the end face of the second connecting portion 321 near the first bracket 310. The number of first straight mating parts 2113 and second straight mating parts 2114 can be multiple, and the multiple first straight mating parts 2113 and multiple second straight mating parts 2114 can be arranged in a staggered manner around the protruding shaft section 211. In this way, not only can the accidental rotation of the protruding shaft section 211 be avoided, but the axial stability of the protruding shaft section 211 can also be enhanced, ensuring the stability of the operation of the external rotor motor 20.

[0063] In one embodiment of this utility model, see reference Figure 9The extended shaft segment 211 may be provided with a first straight mating part 2113 and a second straight mating part 2114. It should be noted that the second mating surface 2113b is closer to the first end 2111 than the fourth mating surface 2114b, so that the first connecting part 311 or the second connecting part 321 can reach the position of the first end 2111, facilitating assembly. There may be two first straight mating parts 2113 and two second straight mating parts 2114, which can be arranged circumferentially staggered on the extended shaft segment 211. Specifically, the two first straight mating parts 2113 and the two second straight mating parts 2114 can be arranged opposite each other. This further prevents accidental rotation of the extended shaft segment 211, ensuring the stability of the external rotor motor 20 during operation.

[0064] See again Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 11 , Figure 12 and Figure 13 The second connecting portion 321 may include a second plate portion 3213 and a second boss portion 3214 protruding from the second plate portion 3213. A second through hole 3211 can pass through the second boss portion 3214 and the second plate portion 3213. The second through hole 3211 can be interference-fitted with the protruding shaft section 211. Understandably, the inner contour of the second through hole 3211 can be adapted to the outer contour of the protruding shaft section 211 so that the protruding shaft section 211 can be securely inserted into the second through hole 3211. It should be noted that the foot portion 313 can be connected to the second plate portion 3213, which not only enhances the structural strength of the second plate portion 3213 but also ensures the stability of the connection between the first bracket 310 and the second bracket 320. Thus, a hollow cavity can be formed in the second boss portion 3214. When the protruding shaft section 211 passes through the second plate portion 3213, the inner wall surface of the hollow cavity can fit with the outer wall surface of the protruding shaft section 211, thereby increasing the contact area between the second bracket 320 and the protruding shaft section 211, and further enhancing the connection strength between the second bracket 320 and the protruding shaft section 211.

[0065] See Figure 2 and Figure 11The second end 2112 can be connected to a fastener 40, and the second connecting part 321 can have an outer surface away from the first bracket 310, with the fastener 40 abutting against the outer surface. The fastener 40 can be a nut, etc. The connection between the fastener 40 and the second end 2112 further constrains the radial and axial directions of the protruding shaft section 211. This further prevents vibrations generated during operation of the external rotor motor 20 or accidental detachment of the bracket due to external forces, effectively improving the reliability and safety of the air handling unit assembly.

[0066] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 10 , Figure 11 and Figure 12 The volute 10 may have an air inlet 120, and an air guide ring 50 may be provided at the air inlet 120. The second bracket 320 can be connected to the volute 10 through the air guide ring 50. Specifically, the outer ring portion 501 of the air guide ring 50 can be connected to the volute 10, and the inner ring portion 502 of the air guide ring 50 can extend into the receiving cavity. The second bracket 320 can be connected to the outer surface of the air guide ring 50 away from the volute 10. The second bracket 320 is connected to both the first bracket 310 and the air guide ring 50. In this way, the rigid connection between the air guide ring 50 and the volute 10 enhances the overall stability, and the bracket assembly 30, the air guide ring 50, and the volute 10 form a linkage support to enhance the overall integrity.

[0067] See again Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 10 , Figure 11 and Figure 12 The air guide ring 50 may have an annular body 510, and the end of the second support 320 away from the second connecting portion 321 may have a plate-shaped portion 323, which can form surface contact with the annular body 510. As an intermediate carrier, the air guide ring 50 not only bears the weight of the support assembly 30, but also seamlessly connects to the streamlined air duct of the volute 10 through the annular body 510, ensuring unobstructed airflow on the intake side. This not only enhances the structural strength of the second support 320, but also increases the contact area between the second support 320 and the air guide ring 50, thereby strengthening the connection between them.

[0068] In some embodiments, see reference again Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6, Figure 10 , Figure 11 and Figure 12 The annular body 510 is provided with a guide portion 511 protruding away from the volute 10. The guide portion 511 can guide the oily fume airflow, allowing the oily fume airflow to quickly enter the fan 1. Multiple guide portions 511 can be provided, spaced apart circumferentially around the annular body 510. A mounting portion 512 is provided between every two guide portions 511, and the plate-shaped portion 323 can form surface contact with the mounting portion 512. Specifically, the plate-shaped portion 323 can be connected to the mounting portion 512 by a fastening structure. The fastening structure can be screws or bolts, etc. This enhances the stability of the connection between the air guide ring 50 and the support assembly 30, and facilitates installation or disassembly, cleaning, or maintenance. Of course, the plate-shaped portion 323 and the mounting portion 512 can be connected by welding or snap-fit ​​connections.

[0069] According to another aspect of the present invention, a range hood is provided. The range hood may include a housing and a fan 1 as described above. The housing may enclose a receiving cavity, and the fan 1 may be located within the receiving cavity. The range hood of the present invention includes the fan 1 as described above. Since the fan 1 has the aforementioned beneficial effects, the range hood including the fan 1 as described above will necessarily also have the aforementioned beneficial effects.

[0070] In the description of this utility model, it should be understood that the directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" indicate the orientation or positional relationship, which are usually 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. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0071] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0072] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0073] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0074] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fan, characterized in that, include: The volute, which encloses and forms an installation cavity; An external rotor motor, wherein at least part of the external rotor motor is located within the mounting cavity, and the external rotor motor has a central shaft and an external rotating body, wherein the central shaft passes through the external rotating body, and one end of the central shaft passes through the external rotating body to form an extended shaft section outside the external rotating body; as well as A support assembly having a first support and a second support, the first support being connected between the extended shaft segment and the second support, the second support being connected between the extended shaft segment and the volute, and the connection points of the extended shaft segment and the first and second supports not coinciding.

2. The fan according to claim 1, characterized in that, The first bracket has a first connecting portion at the end away from the second bracket, the second bracket has a second connecting portion at the end away from the volute, and the protruding shaft segment has a first end and a second end, the second end being farther away from the outer rotating body than the first end; Wherein, the first end is connected to the first connecting part, and the second end is connected to the second connecting part; or, the first end is connected to the second connecting part, and the second end is connected to the first connecting part.

3. The fan according to claim 2, characterized in that, The first bracket includes at least two support frames, which are spaced apart in the circumferential direction at the first connection to form a claw-like structure.

4. The fan according to claim 3, characterized in that, The first connecting part is provided with a first through hole, and the first connecting part forms a first flat limiting part at the hole wall of the first through hole, and the protruding shaft section has a flat fitting part that abuts against the first flat limiting part.

5. The fan according to claim 4, characterized in that, The first connecting portion includes a first plate portion and a first boss portion protruding from the first plate portion, and the first through hole passes through the first boss portion and the first plate portion.

6. The fan according to claim 5, characterized in that, The support frame is connected to the outer edge of the first plate, and the support frame and the first boss are located on opposite sides of the first plate.

7. The fan according to claim 5, characterized in that, The support frame has a foot at one end away from the first plate, and the foot is connected to the second bracket.

8. The fan according to claim 7, characterized in that, The foot makes surface contact with the second bracket.

9. The fan according to claim 2, characterized in that, The second bracket includes at least two connecting frames, which are spaced apart in the circumferential direction of the second connecting portion, and each connecting frame extends radially outward from the outer edge of the second connecting portion; or each connecting frame extends by bending from the outer edge of the second connecting portion.

10. The fan according to claim 9, characterized in that, The second connecting part is provided with a second through hole, and the second connecting part forms a second flat limiting part at the hole wall of the second through hole. The protruding shaft section has a flat fitting part that abuts against the second flat limiting part.

11. The fan according to claim 10, characterized in that, The second connecting portion includes a second plate portion and a second boss portion protruding from the second plate portion, and the second through hole passes through the second boss portion and the second plate portion.

12. The fan according to claim 2, characterized in that, The second end is connected to a fastener, and the second connecting part has an outer side away from the first bracket, and the fastener abuts against the outer side.

13. The fan according to claim 2, characterized in that, The volute has an air inlet, and an air guide ring is provided at the air inlet. The second bracket is connected to the volute through the air guide ring.

14. The fan according to claim 13, characterized in that, The air guide ring has an annular body, and a plate-shaped portion is formed at one end of the second bracket away from the second connecting portion, and the plate-shaped portion forms a surface contact with the annular body.

15. A range hood, characterized in that, It includes a housing and a fan as described in any one of claims 1 to 14, the housing enclosing a receiving cavity, and the fan being located within the receiving cavity.

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