Cabinet assembly and extractor hood

Abstract

The utility model provides a kind of wind cabinet assembly and range hood, including cabinet, fan and support, cabinet is enclosed to form containing cavity, and cabinet has cabinet top wall;Fan has volute and outer rotor motor, volute is positioned in containing cavity, volute is enclosed to form with installation cavity, outer rotor motor is at least partially located in installation cavity;The center axis of outer rotor motor is connected to cabinet top wall by support at least one end.The utility model in the present application, the fixed base point of outer rotor motor is shifted from volute to cabinet top wall, the transmission path of vibration generated by outer rotor motor to volute is cut off, cabinet top wall can effectively absorb the vibration generated by outer rotor motor, thereby reducing the noise of wind cabinet assembly, and the end connected with the center axis of support only occupies part of fan air inlet area, the area is smaller, effectively ensure the air inlet efficiency of fan, and then improve the smoke suction effect of range hood.

Description

Technical Field

[0001] This utility model relates to the field of kitchenware technology, specifically to a fan cabinet assembly 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] Current range hoods typically use an internal rotor motor as the power output component. The central shaft of the internal rotor motor is connected to the motor housing via bearings, and the motor housing is connected to the volute via a support structure.

[0004] However, the vibrations generated by the internal rotor motor during operation can be transmitted through the central shaft to the motor housing, and then through the motor housing to the volute, causing resonance in the volute cavity and significantly increasing the noise of the internal rotor motor. Furthermore, to ensure the robust connection between the motor housing and the volute, a complex support structure needs to be installed at the air inlet of the volute. This occupies a large area of ​​the airflow channel at the air inlet, resulting in a loss of air intake efficiency for the internal rotor motor and consequently reducing the smoke extraction effect of the range hood. Utility Model Content

[0005] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, a blower assembly is provided, the technical solution of which is as follows.

[0006] The air handling unit assembly includes a cabinet, a fan, and a support. The cabinet encloses a receiving cavity and has a top wall. The fan has a volute and an external rotor motor. The volute is positioned within the receiving cavity and encloses a mounting cavity. The external rotor motor is at least partially located within the mounting cavity. At least one end of the central shaft of the external rotor motor is connected to the top wall of the cabinet via the support.

[0007] The fan housing assembly of this invention can use an external rotor motor as the power component. The external rotor motor has the characteristics of high torque and low speed. When applied to a range hood, it can improve the smoke extraction efficiency. Furthermore, the central shaft of the external rotor motor is connected to the top wall of the cabinet via a bracket, shifting the motor's fixing point from the volute to the top wall. This cuts off the transmission path of vibrations generated by the external rotor motor to the volute, allowing the top wall to effectively absorb the vibrations, thereby reducing the noise of the fan housing assembly. Moreover, the bracket only occupies a small portion of the fan's air intake area, effectively ensuring the fan's air intake efficiency and further improving the smoke extraction effect of the range hood.

[0008] For example, the volute has an air inlet, and the fan also has a guide shroud with a first end and a second end. The first end is connected to the central axis, and the second end is further away from the air inlet than the first end. The guide shroud gradually increases in size from the first end to the second end. With this configuration, when the fan housing assembly is applied to a range hood, the guide shroud can guide the oily airflow into the mounting cavity. Because the guide shroud gradually increases in size from the first end to the second end, it effectively optimizes the airflow path, avoids turbulence in the area near the central axis, reduces airflow collision losses and aerodynamic noise in the area near the central axis, and thus further improves the smoke extraction effect of the range hood.

[0009] For example, the air guide hood forms an arc-shaped airflow guide surface between the first and second ends. With this configuration, when the air handling unit assembly is applied to the range hood, the air guide hood guides the oil-containing airflow along the arc-shaped airflow guide surface into the mounting cavity, further optimizing the airflow path, avoiding turbulence in the area near the central axis, reducing airflow collision losses and aerodynamic noise in the area near the central axis, thereby further improving the smoke extraction effect of the range hood.

[0010] For example, the bracket forms a connecting body with a through hole. The connecting body has a flat limiting part at the wall of the through hole, and the central shaft has a flat mating part that abuts against the flat limiting part. With this configuration, the mating between the flat limiting part and the flat mating part not only improves the connection strength between the central shaft and the bracket, but also prevents accidental rotation of the central shaft, ensuring the stability of the external rotor motor operation.

[0011] For example, the connecting body includes a plate portion and a boss portion protruding from the plate portion, with a through hole penetrating both the boss portion and the plate portion. This configuration allows a hollow cavity to be formed within the boss portion. When the central shaft passes through the plate portion, the inner wall surface of the hollow cavity can fit against the outer wall surface of the central shaft, thereby increasing the contact area between the support and the central shaft, and thus enhancing the connection strength between the support and the central shaft.

[0012] For example, a connecting portion extends from the outer edge of the plate by bending, with the connecting portion and the boss located on opposite sides of the plate. A support arm connected to the connecting portion is formed on the bracket. This arrangement, on the one hand, strengthens the structural integrity of the connecting body by extending the connecting portion from the outer edge of the plate, and facilitates manufacturing. On the other hand, the support arm formed on the bracket allows vibrations generated by the external rotor motor to be transmitted to the top wall of the cabinet, effectively absorbing these vibrations and reducing noise in the air handling unit assembly.

[0013] For example, the support arm includes a first arm and a second arm. The end of the first arm away from the connecting part is bent and extended to form a first connecting plate, which forms a surface contact with the top wall of the cabinet. The end of the second arm away from the connecting part is bent and extended to form a second connecting plate, which also forms a surface contact with the top wall of the cabinet. This configuration, on the one hand, by providing the first and second arms, can disperse and evenly transmit the vibrations experienced by the connecting body to the top wall of the cabinet, preventing damage to the support due to stress concentration and greatly improving the load-bearing capacity and stability of the support. On the other hand, the first and second connecting plates respectively forming surface contacts with the top wall of the cabinet not only increase the contact area between the support and the top wall of the cabinet, enhancing the stability of the connection between the support and the top wall of the cabinet, but also further efficiently transmits the vibrations generated by the external rotor motor to the top wall of the cabinet through the support, reducing the noise generated by the air handling unit assembly.

[0014] For example, the connecting part has a first connecting edge and two second connecting edges. The first connecting edge is connected to the outer edge of the plate, and the two second connecting edges are arranged opposite to each other and adjacent to the first connecting edge. The first arm and the second arm are respectively connected to the two second connecting edges. With this arrangement, the first arm and the second arm are respectively connected to the two second connecting edges of the connecting part, forming a V-shaped structure together with the connecting part. On the one hand, the V-shaped structure has high geometric stability, which helps the first arm and the second arm resist deformation caused by vibration and can absorb a certain amount of vibration, thereby reducing the noise generated by the air handling unit assembly. On the other hand, the V-shaped structure can transmit the vibration acting on the connecting body in an oblique direction to the top wall of the cabinet, avoiding the situation where the top wall of the cabinet is damaged due to local stress concentration when the vibration is transmitted in a vertical direction.

[0015] For example, a flange extends from the outer edge of the plate portion, and the flange and the connecting portion are located on the same side of the plate portion, forming an enclosing cavity together. This configuration, with the flange extending from the outer edge of the plate portion, enhances the structural strength of the connecting body. Furthermore, the fact that the flange and the connecting portion are located on the same side of the plate portion, forming an enclosing cavity together, facilitates the connection between the flange and the connecting portion, thereby further enhancing the structural strength of the connecting body.

[0016] For example, the connecting body is columnar and has a first end face and a second end face disposed opposite to each other, with a through hole extending from the first end face to the second end face. This columnar configuration ensures the structural strength of the connecting body. When the central shaft passes through the through hole, it fits against the wall of the through hole, increasing the contact area between the support and the central shaft, thereby effectively ensuring the connection strength between the support and the central shaft.

[0017] For example, a support arm is formed on the bracket and connected to the outer periphery of the connecting body. This arrangement allows vibrations generated by the external rotor motor to be transmitted to the top wall of the cabinet via the support arm. The top wall can effectively absorb these vibrations, thereby reducing the noise of the air handling unit assembly.

[0018] For example, a fixed connection portion is formed at the end of the support arm away from the connecting body, and the fixed connection portion forms surface contact with the top wall of the cabinet. This arrangement not only increases the contact area between the support and the top wall of the cabinet, thereby improving the stability of the connection between the support and the top wall of the cabinet, but also evenly transmits the vibration generated by the external rotor motor to the top wall of the cabinet through the support, reducing the noise generated by the air handling unit assembly.

[0019] For example, the central shaft has a first shaft end and a second shaft end, and there are two supports, one of which is connected to the first shaft end of the central shaft, and the other of which is connected to the second shaft end of the central shaft. This configuration, on the one hand, shifts the fixing point of the external rotor motor from the volute to the top wall of the cabinet, cutting off the transmission path of vibrations generated by the external rotor motor to the volute. Furthermore, only the ends of the two supports connected to the central shaft occupy a small portion of the fan's air intake area, effectively ensuring the fan's air intake efficiency. On the other hand, the double-ended fixing of the central shaft not only provides stable support for the central shaft but also effectively prevents axial and radial swaying, eliminating the cantilever torque that could lead to unstable operation of the external rotor motor. This significantly reduces the eccentricity of the external rotor motor, ensuring its operational stability.

[0020] According to another aspect of the present invention, a range hood is provided, which includes a smoke collection hood and a fan assembly as described above, with the smoke collection hood disposed below the fan assembly. The range hood of the present invention includes the fan assembly as described above. Since the fan assembly described above has the beneficial effects described above, the range hood including the fan assembly described above will necessarily also have the beneficial effects described above.

[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 This is a front view of a portion of the air handling unit assembly in an exemplary embodiment of the present invention;

[0025] Figure 2 for Figure 1 Cross-sectional view of some of the air handling unit components shown Figure 1 ;

[0026] Figure 3 for Figure 1 Cross-sectional view of some of the air handling unit components shown Figure 2 ;

[0027] Figure 4 for Figure 2 A three-dimensional view of the fairing shown;

[0028] Figure 5 for Figure 1 A 3D view of the bracket shown;

[0029] Figure 6 for Figure 1 A 3D view of the external rotor motor shown;

[0030] Figure 7 for Figure 6 Enlarged view of section I;

[0031] Figure 8 This is a front view of a portion of the air handling unit assembly, as shown in another exemplary embodiment of the present invention.

[0032] Figure 9 for Figure 8 Cross-sectional view of some of the air handling unit components shown Figure 1 ;

[0033] Figure 10 for Figure 8 Cross-sectional view of some of the air handling unit components shown Figure 2 ;

[0034] Figure 11 for Figure 8 The diagram shows a three-dimensional view of the support frame.

[0035] The above figures include the following reference numerals:

[0036] 10. Cabinet body; 110. Receiving cavity; 120. Cabinet top wall; 130. Cabinet side wall; 20. Fan; 210. Volute; 211. Mounting cavity; 212. Air inlet; 220. External rotor motor; 221. Central shaft; 2211. Straight mating part; 2212. First mating surface; 2213. Second mating surface; 2214. First shaft end; 2215. Second shaft end; 222. Rotor; 230. Impeller; 240. Flow guide; 241. First end; 242. Second end; 243. Arc-shaped flow guide surface; 244. Fixing part; 245. Through hole; 2451. Straight limiting wall; 2452. Snap-fit ​​part ; 2452a, First snap-fit ​​surface; 2452b, Second snap-fit ​​surface; 30, Bracket; 301, First connecting end; 302, Second connecting end; 310, Connecting body; 311, Through hole; 3111, Flat limiting part; 312, Plate part; 313, Boss part; 314, Connecting part; 3141, First connecting edge; 3142, Second connecting edge; 315, Flanged part; 316, Enclosing cavity; 317, First end face; 318, Second end face; 320, Support arm; 321, First arm; 3211, First connecting plate; 322, Second arm; 3221, Second connecting plate; 323, Fixed connecting part. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] This utility model provides a fan housing assembly. The fan housing assembly of this utility model can be applied to range hoods. The following will describe in detail a fan housing assembly according to an embodiment of this utility model with reference to the accompanying drawings.

[0040] See also Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 10The air handling unit assembly may include a cabinet 10, a fan 20, and a support 30. The cabinet 10 may enclose a receiving cavity 110, and the cabinet 10 may have a top wall 120. The fan 20 may have a volute 210 and an external rotor motor 220. The volute 210 may be positioned within the receiving cavity 110. Specifically, the volute 210 may be directly or indirectly connected to the top wall 120 so that the volute 210 is positioned within the receiving cavity 110. When the volute 210 is indirectly connected to the top wall 120, the volute 210 may be connected to the top wall 120 through a connector or other structure. Of course, the volute 210 may also be positioned within the receiving cavity 110 in other ways, for example, the cabinet 10 may also have a side wall 130, and the volute 210 may also be directly or indirectly connected to the side wall 130. When the volute 210 is indirectly connected to the cabinet side wall 130, the volute 210 can be connected to the cabinet side wall 130 through a connector or other structure. Care should be taken to avoid the connector or other structure affecting the air intake of the fan 20. The volute 210 can enclose a mounting cavity 211. The external rotor motor 220 can be at least partially located within the mounting cavity 211. At least one end of the central shaft 221 of the external rotor motor 220 is connected to the cabinet top wall 120 via a bracket 30. Specifically, the bracket 30 can have a first connecting end 301 and a second connecting end 302. The first connecting end 301 can be connected to at least one end of the central shaft 221, and the second connecting end 302 can be connected to the cabinet top wall 120. Understandably, a non-rigid connection can be used between the external rotor motor 220 and the volute 210 to prevent the vibration generated by the external rotor motor 220 from being transmitted to the volute 210.

[0041] It should be noted that when the fan housing assembly is applied to a range hood, the cabinet 10 is the outer shell of the range hood, which needs to provide support and fixation for the range hood, bearing the weight of the range hood itself and various external forces generated during installation, such as handling, collisions during installation, and contact within the kitchen. Therefore, it needs to have high strength to ensure its stability and durability. To meet the functional requirements of support and protection, the cabinet 10 can be made of high-strength materials, such as stainless steel, cold-rolled steel plate, and aluminum-zinc coated steel plate. These materials, with high yield strength and tensile strength, can withstand greater external forces without deformation or damage. The volute 210 is located within the receiving cavity 110 formed by the cabinet 10. Its main function is to guide airflow, allowing air to be smoothly discharged outdoors through the fan 20. It mainly bears the impact force of the airflow and the vibration generated when the fan 20 is running. These forces are relatively small compared to the external forces borne by the cabinet 10, and the strength requirements are relatively low. Therefore, the volute 210 prioritizes the aerodynamic performance and corrosion resistance of the material, and can utilize relatively lightweight yet strong materials such as galvanized steel, aluminum alloy, or engineering plastics. In other words, the cabinet 10 can be stronger than the volute 210, and the cabinet 10 absorbs the vibrations generated by the external rotor motor 220 better than the volute 210. Similarly, the cabinet top wall 120 can be stronger than the volute 210, and the cabinet top wall 120 absorbs the vibrations generated by the external rotor motor 220 better than the volute 210.

[0042] The fan housing assembly of this invention can use an external rotor motor 220 as the power component. The external rotor motor 220 has the characteristics of high torque and low speed. When applied to a range hood, it can improve the smoke extraction efficiency of the range hood. In addition, the central shaft 221 of the external rotor motor 220 is connected to the top wall 120 of the cabinet through the bracket 30, so that the fixing point of the external rotor motor 220 is transferred from the volute 210 to the top wall 120 of the cabinet. This cuts off the transmission path of the vibration generated by the external rotor motor 220 to the volute 210. The top wall 120 can effectively absorb the vibration generated by the external rotor motor 220, thereby reducing the noise of the fan housing assembly. Moreover, the bracket 30 only occupies a small portion of the air intake area of ​​the fan 20 at the end connected to the central shaft 221, effectively ensuring the air intake efficiency of the fan 20, and thus improving the smoke extraction effect of the range hood. The air intake area of ​​the volute 210 does not require the installation space of the mounting bracket 30 between the relatively set shells, which increases the air intake area, shortens the path of the oil fume airflow, and further improves the air intake efficiency of the fan 20.

[0043] In some embodiments, the volute 210 may have an air outlet, and the top wall 120 of the cabinet may be connected to an air outlet channel. The air outlet of the volute 210 can be connected to the top wall 120 of the cabinet via a connector, and the air outlet is connected to the air outlet channel. When the rotor 222 of the external rotor motor 220 rotates, it can drive the impeller 230 of the fan 20 to rotate, thereby drawing gas into the volute 210 and discharging it through the air outlet of the volute 210 from the air outlet channel. Thus, the top wall 120 of the cabinet can be connected to an air outlet channel, which facilitates installation, and the air outlet of the volute 210 is connected to the top wall 120 of the cabinet via a connector, ensuring the stability of the connection between the volute 210 and the top wall 120 of the cabinet.

[0044] See also Figure 2 , Figure 3 , Figure 4 , Figure 9 and Figure 10 The volute 210 may have an air inlet 212. The fan 20 may also have a shroud 240. The shroud 240 may have a first end 241 and a second end 242. The first end 241 may be connected to the central shaft 221, and the second end 242 may be further away from the air inlet 212 than the first end 241. The shroud 240 gradually increases in size from the first end 241 to the second end 242, meaning that the second end 242 is closer to the impeller 230 than the first end 241, and the first end 241 is thinner than the second end 242. Specifically, the shroud 240 may be constructed as a hollow funnel, trumpet, or cone shape, etc. The shroud 240 can guide the airflow containing oil fumes from the air inlet 212 into the mounting cavity 211, and finally guide it to the air inlet area of ​​the impeller blades 230. It should be noted that when the fan 20 is a dual-inlet fan, the volute 210 can have two air inlets 212, and a guide hood 240 can be installed at each air inlet 212. When the fan 20 is a single-inlet fan, the volute 210 can have one air inlet 212, and a guide hood 240 can be installed at this air inlet 212. Thus, when the fan housing assembly is used in a range hood, the guide hood 240 can guide the oil-containing airflow into the mounting cavity 211. Since the guide hood 240 gradually increases in size from the first end 241 to the second end 242, it effectively optimizes the airflow path, avoids turbulence in the area near the central axis 221, reduces airflow collision losses and aerodynamic noise in the area near the central axis 221, and thus further improves the smoke extraction effect of the range hood.

[0045] See again Figure 2 , Figure 3 , Figure 4 , Figure 9 and Figure 10The air guide shroud 240 forms an arc-shaped guide surface 243 between the first end 241 and the second end 242. It should be noted that the curvature of the arc-shaped guide surface 243 needs to be considered in relation to the overall height of the impeller 230, its inner diameter, and the dimensions of the outer rotor motor 220. Thus, when the air handling unit is used in a range hood, the air guide shroud 240 guides the oil-laden airflow along the arc-shaped guide surface 243 into the mounting cavity 211, further optimizing the airflow path, preventing turbulence in the area near the central shaft 221, reducing airflow collision losses and aerodynamic noise in the area near the central shaft 221, thereby further improving the smoke extraction effect of the range hood.

[0046] In one embodiment of this utility model, the first end 241 may be provided with a fixing part 244, which may have a through hole 245. The central shaft 221 may pass through the through hole 245. The wall of the through hole 245 may have a straight limiting wall 2451. The central shaft 221 may have a straight mating part 2211. The straight limiting wall 2451 may at least partially abut against the straight mating part 2211. The number of straight limiting walls 2451 may be one, two, or more, and the number of straight mating parts 2211 may correspond to the number of straight limiting walls 2451. It should be noted that the more straight limiting walls 2451 and straight mating parts 2211 there are, the better the effect of restricting the circumferential rotation of the central shaft 221. Understandably, the inner contour of the through hole 245 may be adapted to the outer contour of the central shaft 221 so that the central shaft 221 can be securely inserted into the through hole 245. Thus, through the cooperation between the flat limiting wall 2451 and the flat mating part 2211, not only can the connection strength between the central shaft 221 and the guide shroud 240 be improved, but also the accidental rotation of the central shaft 221 can be prevented, ensuring the stability of the operation of the outer rotor motor 220.

[0047] Furthermore, the flat limiting wall 2451 may have a protruding locking portion 2452, and the flat mating portion 2211 may have a first mating surface 2212 and a second mating surface 2213. The first mating surface 2212 and the second mating surface 2213 may be perpendicular to each other. The locking portion 2452 may have a first locking surface 2452a and a second locking surface 2452b. The first locking surface 2452a and the second locking surface 2452b may be perpendicular to each other. The first locking surface 2452a may abut against the first mating surface 2212, and the second locking surface 2452b may abut against the second mating surface 2213. In this way, not only can the accidental rotation of the central shaft 221 be avoided, ensuring the stability of the operation of the outer rotor motor 220, but the axial movement of the guide shield 240 can also be restricted, thus improving the guiding effect.

[0048] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 and Figure 11 The bracket 30 can form a connecting body 310 with a through hole 311. Specifically, the connecting body 310 can be formed at the first connecting end 301. The connecting body 310 can have a straight limiting portion 3111 at the wall of the through hole 311. The central shaft 221 can have a straight mating portion 2211 that abuts against the straight limiting portion 3111. The number of straight limiting portions 3111 can be one, two, or more, and the number of straight mating portions 2211 can correspond to the number of straight limiting portions 3111. It should be noted that the more straight limiting portions 3111 and straight mating portions 2211 there are, the better the effect of restricting the circumferential rotation of the central shaft 221. When both ends of the central shaft 221 are fixed with brackets 30, the two ends of the central shaft 221 can respectively engage with the straight fitting part 2211 and the straight limiting part 3111, so that the central shaft 221 is positioned axially by the brackets 30, thereby ensuring the stability of the operation of the external rotor motor 220. When only one end of the central shaft 221 is fixed with a bracket 30, the central shaft 221 can be positioned axially by the brackets 30 through the engagement of the straight fitting part 2211 and the straight limiting part 3111, and the central shaft 221 can pass through the through hole 311 and engage with fasteners such as nuts, thereby ensuring the stability of the operation of the external rotor motor 220. Of course, other axial positioning methods can also be used to maintain the stability of the operation of the external rotor motor 220. Thus, through the cooperation between the straight limiting part 3111 and the straight mating part 2211, not only can the connection strength between the central shaft 221 and the bracket 30 be improved, but also the accidental rotation of the central shaft 221 can be avoided, ensuring the stability of the operation of the external rotor motor 220.

[0049] See also Figure 2 , Figure 3 and Figure 5 The connecting body 310 may include a plate portion 312 and a boss portion 313 protruding from the plate portion 312. A through hole 311 may pass through the boss portion 313 and the plate portion 312. Understandably, the inner contour of the through hole 311 may be adapted to the outer contour of the central shaft 221 so that the central shaft 221 can be securely inserted into the through hole 311. In this way, a hollow cavity can be formed in the boss portion 313. When the central shaft 221 passes through the plate portion 312, the inner wall surface of the hollow cavity may fit against the outer wall surface of the central shaft 221, thereby increasing the contact area between the support 30 and the central shaft 221, and thus enhancing the connection strength between the support 30 and the central shaft 221.

[0050] See again Figure 2 , Figure 3 and Figure 5A connecting portion 314 can be bent and extended from the outer edge of the plate portion 312. That is, the plate portion 312 and the connecting portion 314 can be an integral structure. The connecting portion 314 and the boss portion 313 can be located on both sides of the plate portion 312. A support arm 320 connected to the connecting portion 314 is formed on the bracket 30. That is, a support arm 320 can be formed between the connecting portion 314 and the second connecting end 302 on the bracket 30. In this way, on the one hand, the connecting portion 314 is bent and extended from the outer edge of the plate portion 312, and the connecting portion 314 and the boss portion 313 are located on both sides of the plate portion 312, which not only strengthens the structural strength of the connecting body 310, but also facilitates processing and manufacturing; on the other hand, the support arm 320 connected to the connecting portion 314 is formed on the bracket 30, and the vibration generated by the external rotor motor 220 can be transmitted to the cabinet top wall 120 through the support arm 320. The cabinet top wall 120 can effectively absorb the vibration generated by the external rotor motor 220, thereby reducing the noise of the air handling unit. Of course, it is also possible that the connecting part 314 and the boss part 313 are located on the same side of the plate part 312 to enhance the structural strength of the connecting body 310. The connecting part 314 and the plate part 312 can also be a separate structure for easy cleaning or maintenance.

[0051] In some embodiments, the connecting portion 314 may protrude from one side surface of the plate portion 312, or the connecting portion 314 may be connected to one side surface of the plate portion 312. This avoids the connecting portion 314 interfering with the central axis 221 passing through the through hole 311, thereby strengthening the structural strength of the connecting body 310.

[0052] In some embodiments, the support arm 320 may be connected between the plate portion 312 and the cabinet top wall 120 to save costs.

[0053] In some embodiments, the connecting body 310 may include a boss 313, and the outer surface of the boss 313 may be connected to a support arm 320 to save costs.

[0054] See again Figure 2 , Figure 3 and Figure 5The support arm 320 may include a first arm 321 and a second arm 322. The end of the first arm 321 furthest from the connecting portion 314 can be bent and extended to form a first connecting plate 3211. That is, the first arm 321 and the first connecting plate 3211 can be an integral structure. The first connecting plate 3211 can form surface contact with the cabinet top wall 120. Specifically, the first connecting plate 3211 can be connected to the cabinet top wall 120 by fasteners to ensure the stability of the connection between the first connecting plate 3211 and the cabinet top wall 120. The end of the second arm 322 furthest from the connecting portion 314 can be bent and extended to form a second connecting plate 3221. That is, the second arm 322 and the second connecting plate 3221 can be an integral structure. The second connecting plate 3221 can form surface contact with the cabinet top wall 120. Specifically, the second connecting plate 3221 can be connected to the cabinet top wall 120 by fasteners to ensure the stability of the connection between the second connecting plate 3221 and the cabinet top wall 120. The fasteners can be screws or bolts, etc. Thus, on the one hand, by providing the first arm 321 and the second arm 322, the vibrations received by the connecting body 310 can be dispersed and evenly transmitted to the cabinet top wall 120, preventing damage to the support 30 due to stress concentration and greatly improving the load-bearing capacity and stability of the support 30. On the other hand, the first connecting plate 3211 and the second connecting plate 3221 respectively form surface contact with the cabinet top wall 120, which not only increases the contact area between the support 30 and the cabinet top wall 120 and enhances the stability of the connection between the support 30 and the cabinet top wall 120, but also further efficiently transmits the vibrations generated by the external rotor motor 220 to the cabinet top wall 120 through the support 30, reducing the noise generated by the air handling unit assembly. Of course, the first arm 321 and the first connecting plate 3211 can also be a separate structure, and the second arm 322 and the second connecting plate 3221 can also be a separate structure for easy cleaning or maintenance. The first connecting plate 3211 can also be connected to the cabinet top wall 120 by welding or snap-fit ​​connection, and the second connecting plate 3221 can also be connected to the cabinet top wall 120 by welding or snap-fit ​​connection, so as to be suitable for different scenarios.

[0055] See again Figure 2 , Figure 3 and Figure 5The connecting portion 314 may have a first connecting edge 3141 and two second connecting edges 3142. The first connecting edge 3141 may be connected to the outer edge of the plate portion 312, and the two second connecting edges 3142 may be arranged opposite to each other and adjacent to the first connecting edge 3141. The first arm 321 and the second arm 322 may be connected to the two second connecting edges 3142 respectively. It should be noted that the first arm 321 and the second arm 322 may be arranged at an angle, that is, the first arm 321 and the second arm 322 may extend obliquely from the connecting portion 314 toward the top wall 120 of the cabinet. Thus, the first arm 321 and the second arm 322 are respectively connected to the two second connecting edges 3142 of the connecting portion 314, forming a V-shaped structure together with the connecting portion 314. On the one hand, the V-shaped structure has high geometric stability, which helps the first arm 321 and the second arm 322 resist deformation caused by vibration and can absorb a certain amount of vibration, thereby reducing the noise generated by the air handling unit assembly. On the other hand, the V-shaped structure can transmit the vibration acting on the connecting body 310 to the top wall 120 of the cabinet in an oblique direction, avoiding the situation where the top wall 120 is damaged due to local stress concentration when the vibration is transmitted to the top wall 120 in a vertical direction. Of course, the possibility that the first arm 321 and the second arm 322 are vertically connected to the connecting portion 314 cannot be ruled out.

[0056] In some embodiments, both the first arm 321 and the second arm 322 can be sheet metal sheets. This not only reduces the area occupied by the first arm 321 and the second arm 322 in the air intake area of ​​the volute 210, effectively ensuring the air intake efficiency of the fan 20, but also ensures the strength of the first arm 321 and the second arm 322, while reducing costs.

[0057] In some embodiments, the number of support arms 320 can be multiple. In this way, the vibrations received by the connecting body 310 can be better dispersed and evenly transmitted to the top wall 120 of the cabinet, preventing damage to the support 30 due to stress concentration, and greatly improving the load-bearing capacity and stability of the support 30.

[0058] See again Figure 2 , Figure 3 and Figure 5A flange 315 can be bent and extended from the outer edge of the plate portion 312. The flange 315 and the connecting portion 314 can be located on the same side of the plate portion 312. The flange 315, the plate portion 312, and the connecting portion 314 can enclose and form an enclosing cavity 316. It should be noted that the flange 315 can be connected to the connecting portion 314. In this way, the flange 315 is bent and extended from the outer edge of the plate portion 312, which enhances the structural strength of the connecting body 310. Moreover, the flange 315 and the connecting portion 314 are located on the same side of the plate portion 312, and the flange 315, the plate portion 312, and the connecting portion 314 enclose and form an enclosing cavity 316, which facilitates the connection between the flange 315 and the connecting portion 314, thereby further enhancing the structural strength of the connecting body 310.

[0059] In some embodiments, the flange 315 may have one, two or more to enhance the structural strength of the connecting body 310.

[0060] In some embodiments, the flange portion 315 and the connecting portion 314 may be located on opposite sides of the plate portion 312. When there are two or more flange portions 315, some flange portions 315 and the connecting portion 314 may be located on opposite sides of the plate portion 312, while other flange portions 315 and the connecting portion 314 may be located on the same side of the plate portion 312. This not only enhances the structural strength of the connecting body 310, but also makes the connecting body 310 suitable for different scenarios.

[0061] See also Figures 9 to 11 The connecting body 310 can be columnar, and can have a first end face 317 and a second end face 318 disposed opposite to each other. A through hole 311 can extend from the first end face 317 to the second end face 318. Understandably, the inner contour of the through hole 311 can be adapted to the outer contour of the central shaft 221, so that the central shaft 221 can be securely inserted into the through hole 311. Thus, the columnar shape of the connecting body 310 ensures its structural strength. The through hole 311 extends from the first end face 317 to the second end face 318. When the central shaft 221 passes through the through hole 311, the central shaft 221 fits against the wall of the through hole 311, increasing the contact area between the bracket 30 and the central shaft 221, thereby effectively ensuring the connection strength between the bracket 30 and the central shaft 221.

[0062] See again Figures 9 to 11A support arm 320 is formed on the bracket 30, connecting to the outer periphery of the connecting body 310. That is, a support arm 320 can be formed between the outer periphery of the bracket 30 and the second connecting end 302. The bracket 30 can be cast as a single support arm 320 bracket 30. It should be noted that there can be only one support arm 320, and the support arm 320 has a certain thickness to ensure the structural strength of the bracket 30. The support arm 320 and the connecting body 310 can be an integral structure to enhance the structural strength of the bracket 30. In this way, the vibration generated by the external rotor motor 220 is transmitted to the cabinet top wall 120 through the support arm 320. The cabinet top wall 120 can effectively absorb the vibration generated by the external rotor motor 220, thereby reducing the noise of the air handling unit assembly. Of course, the support arm 320 and the connecting body 310 can also be separate structures for easy cleaning or maintenance.

[0063] See again Figures 9 to 11 The end of the support arm 320 furthest from the connecting body 310 may have a fixed connection portion 323. The fixed connection portion 323 can form surface contact with the cabinet top wall 120. The fixed connection portion 323 and the support arm 320 can be an integral structure to enhance structural strength. The fixed connection portion 323 and the support arm 320 can form a "T" shape, increasing strength and preventing deformation. Specifically, the fixed connection portion 323 can be connected to the cabinet top wall 120 using fasteners to ensure the stability of the connection between the fixed connection portion 323 and the cabinet top wall 120. Fasteners can be screws or bolts, etc. This not only increases the contact area between the bracket 30 and the cabinet top wall 120, thereby improving the stability of the connection between the bracket 30 and the cabinet top wall 120, but also evenly transmits the vibration generated by the external rotor motor 220 to the cabinet top wall 120 through the bracket 30, reducing the noise generated by the air handling unit assembly. Of course, the support arm 323 and the fixed connection portion 323 can also be separate structures for easier cleaning or maintenance. The fixed connection part 323 and the support arm 320 can be formed into other shapes. The fixed connection part 323 and the cabinet top wall 120 can also be connected by welding or snap-fit ​​connection to suit different scenarios.

[0064] See also Figure 2 , Figure 3 , Figure 9 and Figure 10 The central shaft 221 may have a first shaft end 2214 and a second shaft end 2215. There may be two supports 30, one of which can be connected to the first shaft end 2214 of the central shaft 221, and the other of which can be connected to the second shaft end 2215 of the central shaft 221. Specifically, as... Figure 2 and Figure 3Both supports 30 can be constructed from a connecting body 310 including a plate portion 312 and a boss portion 313 protruding from the plate portion 312, and a support arm 320 including a first arm 321 and a second arm 322. For example... Figure 9 and Figure 10 Both supports 30 can be constructed from a columnar connecting body 310 and a single support arm 320. In an embodiment not shown in the figures, one of the two supports 30 can be constructed from a connecting body 310 including a plate portion 312 and a boss portion 313 protruding from the plate portion 312, and a support arm 320 including a first arm 321 and a second arm 322; the other of the two supports 30 can be constructed from a columnar connecting body 310 and a single support arm 320. Of course, the supports 30 can also be any of the suitable configurations described above. Thus, on the one hand, the fixed base point of the external rotor motor 220 is moved from the volute 210 to the top wall 120 of the cabinet, cutting off the transmission path of the vibration generated by the external rotor motor 220 to the volute 210. Moreover, only the end of the two supports 30 connected to the central shaft 221 occupies part of the air intake area of ​​the fan 20, which occupies a small area and effectively ensures the air intake efficiency of the fan 20. On the other hand, the central shaft 221 is fixed at both ends, which not only provides stable support for the central shaft 221, but also effectively avoids the central shaft 221 from shaking in the axial and radial directions, eliminating the cantilever torque that may cause the external rotor motor 220 to operate unstablely, thereby greatly reducing the eccentricity of the external rotor motor 220 and ensuring the stability of the operation of the external rotor motor 220.

[0065] In an embodiment not shown in the figure, the central shaft 221 may be connected to the cabinet top wall 120 at only one end via the bracket 30, and the central shaft 221 and the bracket 30 shall have a certain contact length to ensure the stability of the operation of the external rotor motor 220. The bracket 30 may be any of the above-mentioned suitable options.

[0066] In an embodiment not shown in the figure, the top wall 120 of the cabinet may have an inner protrusion protruding into the receiving cavity 110. The second connecting end 302 of the bracket 30 may be connected to the inner protrusion. In this way, not only is the increased space occupied by the air handling unit avoided, but the strength of the top wall 120 of the cabinet is also enhanced, which can effectively absorb the vibration generated by the external rotor motor 220, thereby reducing the noise of the air handling unit.

[0067] In an embodiment not shown in the figures, the top wall 120 of the cabinet may also have an outward protrusion protruding outward toward the receiving cavity 110. The second connecting end 302 of the bracket 30 may be connected to the outward protrusion. In this way, the strength of the top wall 120 of the cabinet is enhanced, and the vibration generated by the external rotor motor 220 can be effectively absorbed, thereby reducing the noise of the air handling unit assembly.

[0068] In an embodiment not shown in the figure, a limiting groove may be provided on the top wall 120 of the cabinet. The second connecting end 302 of the bracket 30 may be disposed within the limiting groove. In this way, the radial movement of the second connecting end 302 is restricted by the limiting groove, thereby enhancing the stability of the connection between the top wall 120 of the cabinet and the bracket 30.

[0069] When assembling the air handling unit assembly, the external rotor motor 220 can be connected to the impeller 230 first, and then installed into the mounting cavity 211. The volute 210 is connected to the top wall 120 of the cabinet, and then the guide shroud 240 is fitted onto the central shaft 221. The flat limiting wall 2451 can at least partially abut against the flat mating part 2211. The first connecting end 301 of the bracket 30 is connected to the central shaft 221, and the movement of the guide shroud 240 is restricted by the first connecting end 301. The second connecting end 302 is connected to the top wall 120 of the cabinet, thereby positioning the external rotor motor 220 and the impeller 230 within the mounting cavity 211. The top plate of the cabinet connecting the fan 20 is installed into the receiving cavity 110 to complete the assembly of the air handling unit assembly. In this way, the fixed base point of the external rotor motor 220 is moved from the volute 210 to the top wall 120 of the cabinet. This not only cuts off the transmission path of the vibration generated by the external rotor motor 220 to the volute 210, but also allows the top wall 120 to effectively absorb the vibration generated by the external rotor motor 220, thereby reducing the noise of the air handling unit and improving the assembly efficiency.

[0070] According to another aspect of the present invention, a range hood is provided, which includes a smoke collection hood (not shown in the figure) and a fan assembly as described above, wherein the smoke collection hood is disposed below the fan assembly. The range hood of the present invention includes the fan assembly as described above. Since the fan assembly described above has the beneficial effects described above, the range hood including the fan assembly described above will necessarily also have the beneficial effects described above.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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 blower unit assembly, characterized in that, include: The cabinet body encloses and forms a receiving cavity, and the cabinet body has a top wall; A fan having a volute and an external rotor motor, the volute being positioned within the receiving cavity and forming an mounting cavity, the external rotor motor being at least partially located within the mounting cavity; as well as A bracket is provided, and at least one end of the central shaft of the external rotor motor is connected to the top wall of the cabinet via the bracket.

2. The air handling unit assembly according to claim 1, characterized in that, The volute has an air inlet, and the fan also has a flow guide shroud. The flow guide shroud has a first end and a second end. The first end is connected to the central shaft, and the second end is further away from the air inlet than the first end. The flow guide shroud gradually increases in size from the first end to the second end.

3. The air handling unit assembly according to claim 2, characterized in that, The flow guide shroud forms an arc-shaped flow guide surface between the first end and the second end.

4. The air handling unit assembly according to claim 1, characterized in that, The bracket forms a connecting body with a through hole. The connecting body has a flat limiting part at the hole wall of the through hole, and the central shaft has a flat mating part that abuts against the flat limiting part.

5. The air handling unit assembly according to claim 4, characterized in that, The connecting body includes a plate portion and a boss portion protruding from the plate portion, and the through hole passes through the boss portion and the plate portion.

6. The air handling unit assembly according to claim 5, characterized in that, A connecting portion extends from the outer edge of the plate, and the connecting portion and the boss are located on both sides of the plate. A support arm connected to the connecting portion is formed on the bracket.

7. The air handling unit assembly according to claim 6, characterized in that, The support arm includes a first arm and a second arm. The end of the first arm away from the connecting part is bent and extended to form a first connecting plate, which is in surface contact with the top wall of the cabinet. The end of the second arm away from the connecting part is bent and extended to form a second connecting plate, which is in surface contact with the top wall of the cabinet.

8. The air handling unit assembly according to claim 7, characterized in that, The connecting portion has a first connecting edge and two second connecting edges. The first connecting edge is connected to the outer edge of the plate portion. The two second connecting edges are arranged opposite to each other and adjacent to the first connecting edge. The first arm and the second arm are respectively connected to the two second connecting edges.

9. The air handling unit assembly according to claim 6, characterized in that, A flange extends from the outer edge of the plate portion, and the flange portion and the connecting portion are located on the same side of the plate portion, and the flange portion, the plate portion and the connecting portion together form an enclosing cavity.

10. The air handling unit assembly according to claim 4, characterized in that, The connecting body is columnar and has a first end face and a second end face that are disposed opposite to each other. The through hole extends from the first end face to the second end face.

11. The air handling unit assembly according to claim 10, characterized in that, A support arm is formed on the bracket and connected to the outer periphery of the connecting body.

12. The air handling unit assembly according to claim 11, characterized in that, The end of the support arm away from the connecting body has a fixed connection part, which makes surface contact with the top wall of the cabinet.

13. The air handling unit assembly according to any one of claims 1 to 3, characterized in that, The central shaft has a first shaft end and a second shaft end, and there are two supports, one of which is connected to the first shaft end of the central shaft, and the other of which is connected to the second shaft end of the central shaft.

14. A range hood, characterized in that, It includes a smoke hood and a fan assembly as described in any one of claims 1 to 13, wherein the smoke hood is disposed below the fan assembly.

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