Fan assembly and extractor hood

Abstract

The utility model provides a fan assembly and range hood, including outer rotor motor, impeller and cleaning component, outer rotor motor has stator shaft, stator shaft constructs hollow shaft, impeller is connected with the rotor of outer rotor motor, cleaning component has fixed base, rotary spray arm and cleaning medium supply part, fixed base fixedly connected in the end of stator shaft, rotary spray arm rotatably connected with fixed base, and rotary spray arm has cavity and flow channel in, spray hole sets up towards impeller, flow channel is linked together with cavity, and rotary spray arm is provided with spray hole, flow channel is communicated with outside through spray hole, the outlet of cleaning medium supply part is linked together with cavity, and rotary spray arm constructs: under the reaction of the cleaning medium that sprays out of spray hole with stator shaft as the rotating center relative fixed base rotation. In the utility model, not only realize full angle cleaning, and will not cause the influence to the temperature of cleaning medium, under the condition of impeller stop, can also carry out full angle cleaning to impeller, guarantees the cleaning effect.

Description

Technical Field

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

[0002] As people's living standards improve, their demands for a better kitchen cooking environment are also increasing. Range hoods have become an indispensable kitchen appliance in modern homes. Range hoods work by creating a negative pressure zone near the air inlet with a fan, drawing cooking fumes into the unit and expelling them outdoors. After a period of use, grease may accumulate on the impeller, increasing its load, clogging the blade gaps, and causing increased noise. Furthermore, the grease adhering to the impeller can breed bacteria and emit unpleasant odors that may spread into the kitchen and affect people's health.

[0003] Currently, range hoods with impeller self-cleaning functions typically generate steam or hot water through an evaporator. In this method, the nozzles are usually fixed, and the steam or hot water sprayed from the nozzles cleans the entire impeller by the rotation of the impeller. However, when the impeller is stationary, the nozzles cannot clean all angles of the impeller, resulting in a small cleaning range; at low speeds, it is difficult to clean the entire impeller; and at high speeds, the airflow generated by the impeller significantly reduces the steam temperature, leading to poor cleaning results. 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 wind turbine assembly is provided, the technical solution of which is as follows.

[0005] The fan assembly includes an external rotor motor, an impeller, and a cleaning assembly. The external rotor motor has a stator shaft, which is constructed as a hollow shaft. The impeller is connected to the rotor of the external rotor motor. The cleaning assembly has a fixed base, a rotating spray arm, and a cleaning medium supply unit. The fixed base is fixedly connected to the end of the stator shaft. The rotating spray arm is rotatably connected to the fixed base, and the rotating spray arm has a cavity and a flow channel. The spray holes are set towards the impeller, and the flow channel is connected to the cavity. The rotating spray arm is provided with spray holes, and the flow channel is connected to the outside through the spray holes. The outlet of the cleaning medium supply unit is connected to the cavity. The rotating spray arm is constructed such that it rotates relative to the fixed base with the stator shaft as the rotation center under the reaction force of the cleaning medium sprayed from the spray holes.

[0006] The fan assembly of this utility model has a rotating spray arm that can rotate around the stator shaft via a fixed base. The cleaning medium sprayed from the nozzle causes the rotating spray arm to rotate and clean the impeller at the same time. This not only achieves full-angle cleaning but also does not affect the temperature of the cleaning medium. The impeller can be cleaned from all angles even when it is stopped, ensuring the cleaning effect. Moreover, the structure is simple and reduces maintenance costs.

[0007] For example, the rotating spray arm includes a rotating base and a spray arm. The rotating base is rotatably connected to a fixed base, and one end of the spray arm is fixed to the rotating base. The rotating base encloses and forms a cavity, and a flow channel is formed inside the spray arm. In this way, not only is full-angle cleaning achieved, but the temperature of the cleaning medium is not affected. The impeller can also be cleaned from all angles even when the impeller is not rotating, ensuring the cleaning effect. Moreover, the structure is simple, reducing maintenance costs.

[0008] For example, the rotating spray arm includes a first rotating spray arm connected to one end of the stator shaft, and the outlet of the cleaning medium supply unit is connected to the other end of the stator shaft and communicates with the cavity through the hollow part of the stator shaft. Alternatively, the outlet of the cleaning medium supply unit is provided with a connecting pipe, which passes through the stator shaft, and the outlet of the cleaning medium supply unit communicates with the cavity through the connecting pipe. In this way, the flow of the cleaning medium between the fixed base and the first rotating spray arm is ensured so that the cleaning medium can be sprayed out from the spray hole, thereby improving the cleaning effect.

[0009] For example, the first rotating spray arm includes a first rotating seat, which includes a base and a cover. One end of the base has an opening, and the cover seals the opening. In this way, the cover seals the opening of the base, ensuring the flow of the cleaning medium between the fixed seat and the first rotating spray arm so that the cleaning medium can be sprayed out from the nozzle, thereby improving the cleaning effect.

[0010] For example, the seat has a bottom wall and a side wall. The bottom wall is annular and opposite to the opening. The side wall is connected to the outer periphery of the bottom wall. The inner ring of the bottom wall forms a clearance hole. A first mounting hole is provided on the side wall, and the spray arm extends at least partially into the first mounting hole. This facilitates the installation of the spray arm, ensures the stability of the connection, and allows the cleaning medium to enter the flow channel from the cavity.

[0011] For example, the cover has a main body and an enclosure. The enclosure extends from the main body toward the bottom wall of the base, and a second mounting hole is provided on the enclosure. The second mounting hole communicates with the first mounting hole, or the spray arm at least partially passes through the first mounting hole and extends into the second mounting hole. This effectively ensures the stability of the connection, restricts the up-and-down movement and rotation of the cover, avoids the problem of the cover detaching, and allows for the positioning of the spray arm, facilitating its installation.

[0012] For example, the cover has a cover body and a connector, the connector extending from the outer edge of the cover body toward the bottom wall of the seat, and the side wall of the seat has a connecting mating part, the connector and the connecting mating part being detachably connected. In this way, the cover can be installed and removed from the seat, facilitating cleaning or maintenance.

[0013] For example, the spray arm has a first section and a second section, the second section being connected to and perpendicular to the first section, and the end of the first section away from the second section being fixed to a rotating base. Spray holes are disposed on the second section. In this way, the cleaning medium can be effectively sprayed onto the impeller through the spray holes, thereby cleaning the impeller and ensuring a good cleaning effect.

[0014] For example, the projection of the centerline of the nozzle onto the horizontal plane and the projection of the centerline of the first segment onto the horizontal plane have an angle α, where 0° < α ≤ 90°. Setting the angle α within this range ensures that the reaction force of the cleaning medium can drive the rotating spray arm to rotate relative to the fixed seat, allowing for full-angle cleaning of the impeller even when the impeller is stopped, thus ensuring the cleaning effect.

[0015] For example, the fixed base includes a first fixed base corresponding to the first rotating spray arm. The first fixed base has a first base body and a limiting body. The limiting body is formed at one end of the first base body and is disposed in a cavity. The first base body extends out of the cavity through a clearance hole and is sleeved on the end of the stator shaft. In this way, the stability of the connection is ensured, while effectively ensuring that the first rotating spray arm can rotate relative to the first fixed base.

[0016] For example, there is a first gap between the limiting body and the upper surface of the base wall; a second gap between the limiting body and the inner surface of the base side wall; and a third gap between the limiting body and the lower surface of the connecting body. This effectively ensures that the first rotating spray arm can rotate smoothly relative to the first fixed base, and effectively ensures that the cleaning assembly can clean the impeller at all angles.

[0017] For example, the rotating spray arm further includes a second rotating spray arm, and the fixed base further includes a second fixed base. The second fixed base has a second base body and a connecting cover. The second base body has a first end and a second end. The second end is connected to the end of the stator shaft. An opening is provided on the first end. The connecting cover is placed on the opening and surrounds the second base body to form a liquid inlet chamber. The liquid inlet chamber is connected to the cavity. The outlet of the cleaning medium supply part is connected to the connecting cover and is connected to the liquid inlet chamber. The second rotating spray arm is sleeved on the second base body and is limited by the connecting cover. Thus, when the fan is a double-sided air inlet fan, the first fixed base and the first rotating spray arm can cooperate to clean one side of the fan, and the second fixed base and the second rotating spray arm can cooperate to clean the other side of the fan. On the one hand, it not only achieves full-angle cleaning, but also does not affect the temperature of the cleaning medium. It can also clean the impeller from all angles when the impeller is stopped, ensuring the cleaning effect. Moreover, the structure is simple and reduces maintenance costs. On the other hand, the spray arms are provided on both air inlet sides of the fan, which can increase the cleaning range of the impeller and further improve the cleaning effect.

[0018] For example, the rotating spray arm includes a second rotating spray arm, and the fixed base includes a second fixed base. The second fixed base has a second base body and a connecting cover. The second base body has a first end and a second end. The second end is connected to one end of the stator shaft, and the other end of the stator shaft is closed. An opening is provided on the first end. The connecting cover is placed over the opening and surrounds the second base body to form a liquid inlet chamber. The liquid inlet chamber is connected to a cavity. The outlet of the cleaning medium supply part is connected to the connecting cover and communicates with the liquid inlet chamber. The second rotating spray arm is sleeved on the second base body and is limited by the connecting cover. In this way, it is effectively ensured that the second rotating spray arm can rotate around the stator shaft as the rotation center through the second fixed base, while ensuring the flow of the cleaning medium between the second fixed base and the second rotating spray arm so that the cleaning medium can be sprayed out from the spray hole, improving the cleaning effect. Moreover, the structure of the cleaning assembly is simple and saves costs.

[0019] According to another aspect of this utility model, a range hood is provided, including a housing and a fan assembly as described above, the fan assembly being disposed inside the housing. Since the fan assembly described above has the aforementioned beneficial effects, the range hood including the fan assembly described above also has the aforementioned beneficial effects, which will not be elaborated further here.

[0020] 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.

[0021] The advantages and features of this utility model will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] 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,

[0023] Figure 1 A perspective view of a fan assembly as an exemplary embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram illustrating the nozzle structure as an exemplary embodiment of the present invention;

[0025] Figure 3 for Figure 2 Enlarged view of section A;

[0026] Figure 4 An exploded view of a fan assembly as an exemplary embodiment of the present invention;

[0027] Figure 5 A cross-sectional view of a fan assembly as an exemplary embodiment of the present invention;

[0028] Figure 6 A cross-sectional view of a cleaning assembly according to an exemplary embodiment of the present invention;

[0029] Figure 7 A perspective view of the first fixing base, which is an exemplary embodiment of the present invention;

[0030] Figure 8 A perspective view of the base body, which is an exemplary embodiment of the present invention;

[0031] Figure 9 A perspective view of the cover body, which is an exemplary embodiment of the present invention;

[0032] Figure 10 A perspective view of a fan assembly as another exemplary embodiment of the present invention;

[0033] Figure 11 A cross-sectional view of a fan assembly as another exemplary embodiment of the present invention;

[0034] Figure 12 This is a perspective view of the second body, which is another exemplary embodiment of the present invention.

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

[0036] 1. Fan assembly; 10. Cleaning assembly; 110. Fixing base; 111. First fixing base; 1111. First base body; 1111a. Limiting cavity; 1112. Limiting body; 112. Second fixing base; 1121. Second base body; 1121a. First end; 1121b. Second end; 1121c. Opening; 1121d. Through hole; 1121e. Separator; 1121f. Outlet hole; 1122. Connecting cover; 1122a. Cover body; 1122b. Cover side body; 1123. Liquid inlet cavity; 1124. Outlet cavity; 1125. Fixing part; 1125a. First fixing hole; 120. Rotating spray arm; 121. Rotating base; 1211. Cavity; 122. Spray arm; 1221. Flow channel; 1222. First section; 1223. Second section ; 1223a, Nozzle; 123, First Rotary Spray Arm; 1231, First Rotary Seat; 1232, Seat Body; 1232a, Opening; 1232b, Seat Bottom Wall; 1232c, Clearance Hole; 1232d, Seat Side Wall; 1232e, First Mounting Hole; 1232f, Connecting Part; 1233, Cover Body; 1233a, Cover Body; 1233b, Enclosing Body; 1233c, Second Mounting Hole; 1233d, Connecting Body; 124, Second Rotary Spray Arm; 130, Connecting Pipe; 131, Supply Channel; 141, First Gap; 142, Second Gap; 143, Third Gap; 150, Connecting Piece; 20, External Rotor Motor; 210, Stator Shaft; 30, Impeller; 310, Top Plate; 320, Base Plate; 330, Dividing Plate; 40, Support Seat. 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 assembly. The fan assembly of this utility model can be applied to range hoods. The following will describe in detail a fan assembly according to an embodiment of this utility model with reference to the accompanying drawings.

[0040] See also Figures 1 to 12The fan assembly 1 may include an external rotor motor 20, an impeller 30, and a cleaning assembly 10. The external rotor motor 20 may have a stator shaft 210, which may be constructed as a hollow shaft. The impeller 30 may be connected to the rotor of the external rotor motor 20. The cleaning assembly 10 may have a mounting base 110, a rotating spray arm 120, and a cleaning medium supply unit. The mounting base 110 may be fixedly connected to the end of the stator shaft 210. The rotating spray arm 120 may be rotatably connected to the mounting base 110, and the rotating spray arm 120 may have a cavity 1211 and a flow channel 1221. The spray holes 1223a may be oriented towards the impeller 30. The flow channel 1221 may communicate with the cavity 1211. The rotating spray arm 120 may be provided with spray holes 1223a. The flow channel 1221 may communicate with the outside through the spray holes 1223a. The outlet of the cleaning medium supply unit may communicate with the cavity 1211. The rotating spray arm 120 can be configured to rotate relative to the fixed base 110 with the stator shaft 210 as the rotation center under the reaction force of the cleaning medium sprayed from the nozzle 1223a.

[0041] The fan assembly 1 of this utility model has a rotating spray arm 120 that can rotate around the stator shaft 210 via a fixed base 110. The cleaning medium sprayed from the spray hole 1223a causes the rotating spray arm 120 to rotate and clean the impeller 30 at the same time. This not only achieves full-angle cleaning, but also does not affect the temperature of the cleaning medium. The impeller 30 can be cleaned from all angles even when it is stopped, ensuring the cleaning effect. Moreover, the structure is simple and reduces maintenance costs.

[0042] Specifically, the cleaning medium can be water, cleaning agent, steam, etc. Taking steam as an example, the cleaning component 10 of this invention does not affect the temperature of the steam. High-temperature steam can quickly soften and decompose oil stains, and has a good cleaning effect on stubborn oil stains. It can penetrate into every corner and effectively remove oil stains from the gaps of the impeller 30, effectively ensuring the performance of the fan.

[0043] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7The rotating spray arm 120 may include a rotating base 121 and a spray arm 122. The rotating base 121 is rotatably connected to the fixed base 110. One end of the spray arm 122 can be fixed to the rotating base 121. The rotating base 121 can enclose a cavity 1211. A flow channel 1221 can be formed within the spray arm 122. This not only achieves full-angle cleaning but also avoids affecting the temperature of the cleaning medium. Even when the impeller 30 is stopped, full-angle cleaning of the impeller 30 is still possible, ensuring cleaning effectiveness. Furthermore, the structure is simple, reducing maintenance costs. It should be noted that the rotating base 121 and the spray arm 122 can be constructed as separate units, facilitating installation of the rotating spray arm 120 and reducing maintenance costs. Alternatively, the rotating base 121 and the spray arm 122 can be constructed as an integral unit, simplifying processing, saving assembly time, and enhancing the sealing between the rotating base 121 and the spray arm 122. Specifically, when the rotating base 121 and the spray arm 122 are separate structures, that is, the rotating base 121 and the spray arm 122 can be constructed into an integrated structure through snap-fit ​​connection, threaded connection, or other means. When the rotating base 121 and the spray arm 122 are an integrated structure, that is, the rotating base 121 and the spray arm 122 can be constructed into an integrated structure through injection molding, welding, or other means.

[0044] Understandably, the rotating seat 121 and the fixed seat 110 can be connected in a variety of ways, as long as they can rotate relative to each other. For example, they can be connected by a bearing structure or a snap-fit ​​structure. No further restrictions are placed on the connection method between them.

[0045] See also Figures 4 to 7 The rotating seat 121 can be fitted onto the fixed seat 110. The fixed seat 110 may have an axis A1. The rotating seat 121 may have a rotation center line A2. Both the rotation center line A2 and the axis A1 can be coaxial with the center line of the stator shaft 210. This facilitates the installation of the rotating seat 121 and ensures the stability of the rotation of the rotating seat 121 relative to the fixed seat 110.

[0046] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The rotating spray arm 120 may include a first rotating spray arm 123 and is connected to one end of the stator shaft 210. The outlet of the cleaning medium supply unit is provided with a connecting pipe 130, which passes through the stator shaft 210. The outlet of the cleaning medium supply unit communicates with the cavity 1211 through the connecting pipe 130. This ensures smooth transmission of the cleaning medium between the connecting pipe 130 and the first rotating spray arm 123, guarantees the sealing of the connection, avoids cleaning medium leakage, and facilitates the installation and removal of the connecting pipe 130 for cleaning or maintenance.

[0047] Specifically, a supply channel 131 can be passed through the connecting pipe 130. The supply channel 131 can communicate with the cavity 1211. Furthermore, a connector 150 can be provided on one end of the connecting pipe 130. The connector 150 can be at least partially disposed in the limiting cavity 1111a. In this way, the smooth transmission of the cleaning medium between the connecting pipe 130 and the first rotating spray arm 123 can be ensured, the connection can be sealed, the problem of cleaning medium leakage can be avoided, and the installation and disassembly of the connecting pipe 130 can be facilitated.

[0048] In an embodiment not shown in the figures, the rotating spray arm 120 may include a first rotating spray arm 123, which is connected to one end of the stator shaft 210. The outlet of the cleaning medium supply unit may be connected to the other end of the stator shaft 210 and communicate with the cavity 1211 through the hollow portion of the stator shaft 210. In this way, it is effectively ensured that the first rotating spray arm 123 can rotate around the stator shaft 210 via the fixed base 110, while ensuring the flow of the cleaning medium between the fixed base 110 and the first rotating spray arm 123 so that the cleaning medium can be sprayed out from the spray hole 1223a, thereby improving the cleaning effect.

[0049] See also Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 9 The first rotating spray arm 123 includes a first rotating seat 1231, which may include a base 1232 and a cover 1233. The base 1232 may have an opening 1232a at one end. The cover 1233 may seal the opening 1232a. Thus, the cover 1233 seals the opening 1232a of the base 1232, ensuring the flow of the cleaning medium between the fixed seat 110 and the first rotating spray arm 123, allowing the cleaning medium to be sprayed from the nozzle 1223a, thereby improving the cleaning effect. Specifically, the first rotating seat 1231 can be a one-piece structure. That is, the base 1232 and the cover 1233 can be constructed as a single unit through injection molding, welding, or other methods. This effectively ensures the structural strength.

[0050] See also Figure 4 , Figure 5 , Figure 6 and Figure 8The seat 1232 may have a bottom wall 1232b and a side wall 1232d. The bottom wall 1232b may be annular and may be opposite to the opening 1232a. The side wall 1232d may be connected to the outer periphery of the bottom wall 1232b. The inner ring of the bottom wall 1232b may form a clearance hole 1232c. A first mounting hole 1232e may be provided on the side wall 1232d. The spray arm 122 may at least partially extend into the first mounting hole 1232e. This facilitates the installation of the spray arm 122, ensures the stability of the connection, and ensures that the cleaning medium can enter the flow channel 1221 from the cavity 1211.

[0051] See also Figure 4 , Figure 5 , Figure 6 and Figure 9 The cover 1233 may have a cover body 1233a and an enclosure 1233b. The enclosure 1233b extends from the cover body 1233a toward the base wall 1232b, and a second mounting hole 1233c may be provided on the enclosure 1233b. The spray arm 122 may at least partially pass through the first mounting hole 1232e and extend into the second mounting hole 1233c. To ensure that the spray arm 122 can pass through the first mounting hole 1232e and extend into the second mounting hole 1233c, the center line of the second mounting hole 1233c may be coaxial with the center line of the first mounting hole 1232e. In this way, the stability of the connection is effectively guaranteed, the vertical movement and rotation of the cover 1233 are restricted, the problem of the cover 1233 detaching is avoided, and the spray arm 122 can be positioned for installation, which is convenient for the installation of the spray arm 122.

[0052] In an embodiment not shown in the figures, the cover 1233 may have a cover body 1233a and an enclosure 1233b. The enclosure 1233b extends from the cover body 1233a toward the base wall 1232b, and a second mounting hole 1233c may be provided on the enclosure 1233b. The second mounting hole 1233c may communicate with the first mounting hole 1232e. In this way, the cleaning medium can enter the flow channel 1221 from the cavity 1211.

[0053] Specifically, there can be multiple first mounting holes 1232e and second mounting holes 1233c, and in this case, the number of spray arms 122 can also be multiple. This further ensures the cleaning effect. Understandably, the number of first mounting holes 1232e, second mounting holes 1233c, and spray arms 122 can be the same. In one embodiment of this utility model, referring to... Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 9 The number of the first mounting hole 1232e, the second mounting hole 1233c, and the spray arm 122 can all be two, which ensures the cleaning effect while keeping the structure simple.

[0054] In some embodiments, the cover 1233 has a cover body 1233a and a connector 1233d, the connector 1233d extending from the outer edge of the cover body 1233a toward the base wall 1232b. The base side wall 1232d may have a connecting mating portion 1232f. The connector 1233d can be detachably connected to the connecting mating portion 1232f. Understandably, the cover 1233 and the base 1232 are separate structures. When connecting the rotating base 121 and the fixed base 110, the fixed base 110 can first be placed into the cavity 1211 through the opening 1232a, then the fixed base 110 can be extended at least partially outside the cavity 1211 through the clearance hole 1232c, and then the cover 1233 can be installed onto the base 1232 to seal the opening 1232a, thus completing the connection. Thus, the cover 1233 can be installed and removed from the base 1232, facilitating cleaning or maintenance.

[0055] For example, in conjunction with reference Figure 8 and Figure 9 Multiple connectors 1233d can be provided, and these connectors 1233d can be spaced apart circumferentially along the outer edge of the cover body 1233a. Multiple connecting mating parts 1232f can also be provided, and these connecting mating parts 1232f can be spaced apart circumferentially along the side wall 1232d of the seat. Specifically, the connector 1233d can be constructed as an elastic element, and the connecting mating part 1232f can be constructed as a slot. During the process of installing the cover 1233 onto the seat 1232, the elastic element can deform inward under the pressure of the side wall 1232d. When the cover 1233 is installed in place relative to the seat 1232, the elastic element can extend into the slot, no longer under the pressure of the side wall 1232d, thus returning to its original shape and locking in the slot, restricting the movement of the cover 1233. When removing the cover 1233 from the seat 1232, it can be easily pulled out. Thus, the structure is simple and the assembly / disassembly is convenient.

[0056] For example, the connector 1233d can be constructed as a threaded component. The connecting mating part 1232f can be constructed as a threaded mating part. During the process of installing the cover 1233 onto the base 1232, it is only necessary to tighten the threaded component and the threaded mating part together. Loosening the threaded component and the threaded mating part completes the disassembly of the cover 1233. This effectively ensures the stability of the connection between the connector 1233d and the connecting mating part 1232f. Specifically, the threaded component can be provided with external threads, and the threaded mating part can be provided with internal threads, which facilitates the machining of the threaded component and the threaded mating part.

[0057] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The spray arm 122 can have a first section 1222 and a second section 1223. The second section 1223 can be connected to and perpendicular to the first section 1222. The first section 1222 and the second section 1223 can be formed by bending the spray arm 122. The end of the first section 1222 away from the second section 1223 can be fixed to the rotating seat 121. The spray hole 1223a can be provided on the second section 1223. In this way, the cleaning medium can be effectively sprayed onto the impeller 30 through the spray hole 1223a, thereby cleaning the impeller 30 and ensuring the cleaning effect. Specifically, there can be multiple spray holes 1223a. Multiple spray holes 1223a can be arranged at intervals on the second section 1223. Multiple spray holes 1223a can uniformly spray the cleaning medium onto the impeller 30 over a large area, thereby cleaning the impeller 30.

[0058] See also Figures 1 to 6 An angle α can exist between the projection of the centerline of the nozzle 1223a onto the horizontal plane and the projection of the centerline of the first segment 1222 onto the horizontal plane. 0° < α ≤ 90°. For example, angle α can be 1°, 67°, 90°, etc. Setting angle α within this range ensures that the reaction force of the cleaning medium can drive the rotating spray arm 120 to rotate relative to the fixed seat 110, allowing for full-angle cleaning of the impeller 30 even when it stops, thus ensuring the cleaning effect. In one embodiment of this invention, angle α is 90°. In this case, most of the reaction force of the cleaning medium can be used to drive the rotating spray arm 120 to rotate relative to the fixed seat 110, effectively ensuring that the reaction force of the cleaning medium can drive the rotating spray arm 120 to rotate relative to the fixed seat 110, thereby further ensuring the cleaning effect. Understandably, taking the spray arm 122 located on the right side as an example, in conjunction with reference to... Figure 2 and Figure 3 From this perspective, the centerline of the nozzle 1223a can point downward to the right; in an embodiment not shown, the centerline of the nozzle 1223a can also point upward to the right from this perspective.

[0059] In summary, the rotating seat 121 and the spray arm 122 are separate structures. The rotating seat 121 is connected to the cover 1233, and the cover 1233 rotates relative to the fixed seat 110 with the rotating seat 121.

[0060] See also Figure 5 , Figure 6 and Figure 8The fixed base 110 may include a first fixed base 111 corresponding to the first rotating spray arm 123. The first fixed base 111 has a first base body 1111 and a limiting body 1112. The limiting body 1112 may be formed at one end of the first base body 1111 and may be disposed within the cavity 1211. The first base body 1111 may extend outside the cavity 1211 through a clearance hole 1232c and be sleeved on the end of the stator shaft 210. This ensures the stability of the connection and effectively ensures that the first rotating spray arm 123 can rotate relative to the first fixed base 111 with the axis A1 as the rotation center. Furthermore, the limiting body 1112 may be perpendicular to the axis A1 of the first fixed base 111, ensuring both the stability of the connection and the stability of the rotation.

[0061] Specifically, during the assembly of the first rotating spray arm 123, the first fixed seat 111 can be first placed into the cavity 1211 through the opening 1232a. Then, the first seat body 1111 extends out of the cavity 1211 through the clearance hole 1232c. Next, the cover 1233 is installed onto the seat body 1232 to seal the opening 1232a, thus completing the rotational connection between the first rotating seat 1231 and the first fixed seat 111. When installing the spray arm 122, it is only necessary to align the spray arm 122 with the first mounting hole 1232e and insert it. Because the center lines of the first mounting hole 1232e and the second mounting hole 1233c meet the coaxial condition, the spray arm 122 can extend into the second mounting hole 1233c after passing through the first mounting hole 1232e, thereby completing the installation of the spray arm 122.

[0062] In some embodiments, the first rotating seat 1231 and the first fixed seat 111 can be clearance-fitted. This effectively ensures that the first rotating spray arm 123 can rotate smoothly relative to the first fixed seat 111, and effectively ensures that the cleaning assembly 10 can clean the impeller 30 at all angles. Specifically, there can be a gap between the first rotating seat 1231 and the limiting body 1112.

[0063] For example, see Figure 6 A first gap 141 may exist between the limiting body 1112 and the upper surface of the seat bottom wall 1232b. In this way, the obstruction to rotation caused by the limiting body 1112 and the upper surface of the seat bottom wall 1232b during rotation is eliminated.

[0064] For example, see Figure 6 A second gap 142 may be present between the limiting body 1112 and the inner surface of the seat side wall 1232d. In this way, the obstruction to rotation caused by the gap between the limiting body 1112 and the inner surface of the seat side wall 1232d during rotation is eliminated.

[0065] For example, see Figure 6A third gap 143 may be present between the lower surface of the limiting body 1112 and the connecting body 1233d. In this way, the obstruction to rotation caused by the lower surface of the limiting body 1112 and the connecting body 1233d during rotation is eliminated.

[0066] For example, the rotating seat 121 and the limiting body 1112 may have any two of the three gaps: a first gap 141, a second gap 142, and a third gap 143.

[0067] For example, see Figure 6 The rotating seat 121 and the limiting body 1112 can simultaneously have a first gap 141, a second gap 142, and a third gap 143. At this time, it effectively ensures that the first rotating spray arm 123 can rotate smoothly relative to the first fixed seat 111, and effectively ensures that the cleaning assembly 10 can clean the impeller 30 at all angles.

[0068] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The first body 1111 can enclose and form a limiting cavity 1111a. The end of the stator shaft 210 can pass through the limiting cavity 1111a. In this way, the limiting cavity 1111a can limit the end of the stator shaft 210, ensuring the stability of the connection between the stator shaft 210 and the first body 1111.

[0069] See also Figure 10 and Figure 11 The spray arm 122 can be located at the end of the rotating seat 121 away from the fixed seat 110. That is to say, when the rotating seat 121 and the spray arm 122 are an integral structure, the rotating seat 121 and the spray arm 122 can be constructed into an integral structure by injection molding, welding or other methods.

[0070] See also Figures 10 to 12The rotating spray arm 120 may further include a second rotating spray arm 124. The fixed base 110 may further include a second fixed base 112. The second fixed base 112 may have a second base body 1121 and a connecting cover 1122. The second base body 1121 may have a first end 1121a and a second end 1121b. The second end 1121b may be connected to the end of the stator shaft 210. An opening 1121c may be provided on the first end 1121a. The connecting cover 1122 may be provided at the opening 1121c and enclose the second base body 1121 to form a liquid inlet cavity 1123. The liquid inlet cavity 1123 may communicate with the cavity 1211. The outlet of the cleaning medium supply unit may be connected to the connecting cover 1122 and communicate with the liquid inlet cavity 1123. The second rotating spray arm 124 may be sleeved on the second base body 1121 and limited by the connecting cover 1122. Specifically, the second body 1121 can be provided with a through hole 1121d, and the rotating seat 121 can be fitted onto the second body 1121. The liquid inlet chamber 1123 can be connected to the cavity 1211 through the through hole 1121d. Thus, when the fan is a double-sided air inlet fan, the first fixed seat 111 and the first rotating spray arm 123 cooperate to clean one side of the fan, and the second fixed seat 112 and the second rotating spray arm 124 cooperate to clean the other side of the fan. On the one hand, it not only achieves full-angle cleaning, but also does not affect the temperature of the cleaning medium. Even when the impeller 30 is stopped, it can still be cleaned from all angles, ensuring the cleaning effect. Moreover, the structure is simple and reduces maintenance costs. On the other hand, the spray arms 122 are provided on both air inlet sides of the fan, which can increase the cleaning range of the impeller 30 and further improve the cleaning effect. Furthermore, the second body 1121 has a cable outlet cavity 1124, which is separated from the liquid inlet cavity 1123 by a separator 1121e. The cable of the external rotor motor 20 can be installed in the cable outlet cavity 1124, and the second body 1121 can protect the cable of the external rotor motor 20. The portion of the cable outlet cavity 1124 corresponding to the second body 1121 can be provided with a cable outlet hole 1121f, through which the cable of the external rotor motor 20 can extend to the outside to ensure the normal operation of the external rotor motor 20.

[0071] In one embodiment of this utility model, such as Figure 11 The through-hole 1121d can be a strip-shaped hole, which allows for a closer distance between the strip-shaped hole and the inlet of the cleaning medium. When the cleaning medium is water vapor, the outlet area of ​​the water vapor is larger. Of course, the shape of the through-hole 1121d can also be circular or square, etc.

[0072] In some embodiments, such as Figure 11The number of through holes 1121d can be multiple, and these through holes 1121d can be spaced apart circumferentially around the second body 1121. This ensures the flow of the cleaning medium between the second fixed seat 112 and the second rotating spray arm 124, allowing the cleaning medium to be quickly sprayed out from the spray hole 1223a, thus improving the cleaning effect. Of course, it is also possible that the number of through holes 1121d is one or two.

[0073] See also Figures 10 to 12 The connecting cover 1122 may have a cover body 1122a and a cover side body 1122b, with the cover side body 1122b extending from the outer edge of the cover body 1122a toward the location of the second body 1121. The cover body 1122a has an outlet for the cleaning medium inlet, and the end of the cover side body 1122b with the opening 1121c on the second body 1121 can be threaded together. This ensures the flowability of the cleaning medium, allowing it to be ejected from the nozzle 1223a, while also ensuring the stability of the connection between the connecting cover 1122 and the second body 1121 and their airtightness. Alternatively, the end of the cover side body 1122b with the opening 1121c on the second body 1121 can also be connected by snap-fit ​​connections, welding, or other methods. Furthermore, the rotating seat 121 can be located between the connecting cover 1122 and the partition 1121e, and the rotating seat 121 and the connecting cover 1122, as well as the rotating seat 121 and the partition 1121e, are also fitted with a clearance to ensure that the rotating seat 121 can rotate relative to the second fixed seat 112.

[0074] See also Figures 10 to 12 The second end 1121b of the second body 1121 can be provided with a fixing part 1125, which extends away from the liquid inlet chamber 1123 on the second body 1121. The fixing part 1125 is connected to the support base 40 of the blower assembly 1. Specifically, the fixing part 1125 can be provided with a first fixing hole 1125a, and the support base 40 can be provided with a second fixing hole (not shown in the figure). The fixing part 1125 and the support base 40 are connected by screws passing through the first fixing hole 1125a and the second fixing hole in sequence. In this way, the stability of the connection between the second fixing base 112 and the support base 40 is ensured, and the phenomenon of shaking due to the impact of the cleaning medium is avoided, which would affect the cleaning effect. Of course, the fixing part 1125 and the support base 40 can also be connected by welding, snap-fit ​​connection, or other connection methods.

[0075] In an embodiment not shown in the figures, the rotating spray arm 120 may include a second rotating spray arm 124. The fixed base 110 may include a second fixed base 112. The second fixed base 112 may have a second base body 1121 and a connecting cover 1122. The second base body 1121 may have a first end 1121a and a second end 1121b. The second end 1121b may be connected to one end of the stator shaft 210. The other end of the stator shaft 210 may be closed. An opening 1121c may be provided on the first end 1121a. The connecting cover 1122 may be provided at the opening 1121c and enclose the second base body 1121 to form a liquid inlet chamber 1123. The liquid inlet chamber 1123 may communicate with the cavity 1211. The outlet of the cleaning medium supply unit may be connected to the connecting cover 1122 and communicate with the liquid inlet chamber 1123. The second rotating spray arm 124 can be sleeved on the second base body 1121 and limited by the connecting cover 1122. In this way, it is effectively ensured that the second rotating spray arm 124 can rotate around the stator shaft 210 through the second fixed base 112, while ensuring the flow of the cleaning medium between the second fixed base 112 and the second rotating spray arm 124 so that the cleaning medium can be sprayed out from the spray hole 1223a, thereby improving the cleaning effect. Moreover, the structure of the cleaning assembly 10 is simple and saves costs.

[0076] In some embodiments, the fan assembly 1 further includes a support base 40, through which the external rotor motor 20 is connected to the volute. The support base 40 is connected to the stator shaft 210. Thus, the external rotor motor 20 is supported by the support base 40, ensuring the stability of the external rotor motor 20 inside the impeller 30.

[0077] In some embodiments, the impeller 30 can be divided into two parts by a partition plate 330, each part having an air inlet, and the fan correspondingly forming a double-sided air inlet fan, with one side being the main air inlet side and the other side being the auxiliary air inlet side, thus improving air intake efficiency. Figure 1 and Figure 11 As shown, the fan is located on the side of the chassis 320 as the secondary air intake side and on the side of the top plate 310 as the primary air intake side.

[0078] See again Figure 10 and Figure 11 When the fan is a dual-inlet fan, a first rotating spray arm 123 and a first fixed base 111 can be installed on the main inlet side. A second rotating spray arm 124 and a second fixed base 112 can be installed on the secondary inlet side. In this way, on the one hand, not only is full-angle cleaning achieved, but the temperature of the cleaning medium is not affected. The impeller 30 can also be cleaned from all angles even when it is not rotating, ensuring the cleaning effect. Moreover, the structure is simple and the maintenance cost is reduced. On the other hand, the spray arm 122 is installed on both inlet sides of the fan, which can increase the cleaning range of the impeller 30 and further improve the cleaning effect.

[0079] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 When the fan is a dual-inlet fan, the first rotating spray arm 123 and the first fixed seat 111 can be installed only on the side near the top plate 310 (i.e., the main air inlet side). Alternatively, the second rotating spray arm 124 and the second fixed seat 112 can be installed only on the side near the top plate 310 (i.e., the main air inlet side). This not only achieves full-angle cleaning but also avoids affecting the temperature of the cleaning medium. Even when the impeller 30 is stopped, it can still be cleaned from all angles, ensuring cleaning effectiveness. Furthermore, the structure is simple, reducing maintenance costs.

[0080] In an embodiment not shown in the figure, when the fan is a dual-inlet fan, the second rotating spray arm 124 and the second fixed seat 112 can be provided only on the side near the chassis 320 (i.e., the secondary inlet side). Alternatively, the first rotating spray arm 123 and the first fixed seat 111 can be provided only on the side near the chassis 320 (i.e., the secondary inlet side). This not only achieves full-angle cleaning but also avoids affecting the temperature of the cleaning medium. Full-angle cleaning of the impeller 30 can be performed even when the impeller 30 is stopped, ensuring cleaning effectiveness. Furthermore, the structure is simple, reducing maintenance costs.

[0081] In an embodiment not shown in the figure, the fan can be a single-sided air intake fan, and an installation cavity can be formed between the top plate 310 and the bottom plate 320. A rotating spray arm 120 and a fixed base 110 can be installed within the installation cavity. Specifically, the rotating spray arm 120 can be a first rotating spray arm 123 or a second rotating spray arm 124, and the fixed base 110 can be a first fixed base 111 or a second fixed base 112. This not only achieves full-angle cleaning but also avoids affecting the temperature of the cleaning medium. Even when the impeller 30 is stopped, full-angle cleaning of the impeller 30 can still be performed, ensuring cleaning effectiveness. Furthermore, the structure is simple, reducing maintenance costs.

[0082] In an embodiment not shown, taking steam as the cleaning medium as an example, the cleaning medium supply device is a steam generator, and the cleaning medium supply pipe can be connected to the steam generator. The steam generator can heat water to boiling, thereby generating high-temperature steam.

[0083] The cleaning process of cleaning component 10 is described in detail below, taking water vapor as the cleaning medium as an example: High-temperature water vapor generated by the steam generator enters the cavity 1211 through the cleaning medium supply pipe, and then enters the flow channel 1221 from the cavity 1211. Understandably, as water vapor is continuously generated, the internal pressure of the rotating spray arm 120 gradually increases, and the water vapor in the flow channel 1221 is ejected from the nozzle 1223a under the influence of pressure. When the water vapor is ejected at high speed from the nozzle 1223a, the water vapor is subjected to the force exerted by the internal pressure of the rotating spray arm 120. At the same time, the water vapor also exerts a reaction force of equal magnitude and opposite direction on the rotating spray arm 120. Under the action of this reaction force, the rotating spray arm 120 can rotate relative to the fixed seat 110, thereby spraying the cleaning medium onto the impeller 30 at all angles, thus cleaning the impeller 30 at all angles. After cleaning, the water condensed from the residual water vapor and the dissolved oil can be drained together into the oil cup (not shown in the figure) or the designated drain outlet (not shown in the figure). Users only need to clean the oil cup periodically.

[0084] According to another aspect of the present invention, a range hood is provided, comprising a housing (not shown in the figure) and a fan assembly 1 as described above. The fan assembly 1 can be disposed inside the housing. Since the fan assembly 1 described above has the aforementioned beneficial effects, the range hood including the fan assembly 1 described above also has the aforementioned beneficial effects, which will not be elaborated further here.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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 assembly, characterized in that, Includes an external rotor motor, impeller, and cleaning assembly; The external rotor motor has a stator shaft, which is constructed as a hollow shaft; The impeller is connected to the rotor of the external rotor motor; The cleaning assembly has a fixed base, a rotating spray arm, and a cleaning medium supply unit. The fixed base is fixedly connected to the end of the stator shaft. The rotating spray arm is rotatably connected to the fixed base. The rotating spray arm has a cavity and a flow channel. The flow channel is connected to the cavity. The rotating spray arm is provided with spray holes. The spray holes are oriented towards the impeller. The flow channel is connected to the outside through the spray holes. The outlet of the cleaning medium supply unit is connected to the cavity; The rotating spray arm is configured to rotate relative to the fixed base with the stator shaft as the rotation center under the reaction force of the cleaning medium ejected from the spray hole.

2. The wind turbine assembly according to claim 1, characterized in that, The rotating spray arm includes a rotating base and a spray arm. The rotating base is rotatably connected to the fixed base. One end of the spray arm is fixed to the rotating base. The rotating base encloses and forms the cavity. The flow channel is formed inside the spray arm.

3. The wind turbine assembly according to claim 2, characterized in that, The rotating spray arm includes a first rotating spray arm and is connected to one end of the stator shaft. The outlet of the cleaning medium supply unit is connected to the other end of the stator shaft and communicates with the cavity through the hollow part of the stator shaft. Alternatively, the outlet of the cleaning medium supply unit is provided with a connecting pipe, which passes through the stator shaft and communicates with the cavity through the connecting pipe.

4. The wind turbine assembly according to claim 3, characterized in that, The first rotating spray arm includes a first rotating seat, which includes a seat body and a cover body. One end of the seat body forms an opening, and the cover body seals the opening.

5. The wind turbine assembly according to claim 4, characterized in that, The seat has a bottom wall and a side wall. The bottom wall is annular and opposite to the opening. The side wall is connected to the outer periphery of the bottom wall. The inner ring of the bottom wall forms a clearance hole. A first mounting hole is provided on the side wall. The spray arm extends at least partially into the first mounting hole.

6. The wind turbine assembly according to claim 5, characterized in that, The cover has a cover body and an enclosure body. The enclosure body extends from the cover body toward the bottom wall of the seat, and a second mounting hole is provided on the enclosure body. The second mounting hole communicates with the first mounting hole, or the spray arm at least partially passes through the first mounting hole and extends into the second mounting hole.

7. The wind turbine assembly according to claim 5, characterized in that, The cover has a cover body and a connector. The connector extends from the outer edge of the cover body toward the bottom wall of the seat. The side wall of the seat has a connecting part. The connector and the connecting part are detachably connected.

8. The wind turbine assembly according to claim 2, characterized in that, The spray arm has a first section and a second section, the second section is connected to the first section and perpendicular to the first section, the end of the first section away from the second section is fixed to the rotating seat, and the spray hole is disposed on the second section.

9. The wind turbine assembly according to claim 8, characterized in that, The projection of the centerline of the nozzle onto the horizontal plane has an angle α with respect to the projection of the centerline of the first segment onto the horizontal plane, where 0° < α ≤ 90°.

10. The wind turbine assembly according to claim 7, characterized in that, The fixed base includes a first fixed base corresponding to the first rotating spray arm. The first fixed base has a first base body and a limiting body. The limiting body is formed at one end of the first base body and is limited in the cavity by the bottom wall of the base. The first base body extends out of the cavity through the relief hole and is sleeved on the end of the stator shaft.

11. The wind turbine assembly according to claim 10, characterized in that, There is a first gap between the limiting body and the upper surface of the seat bottom wall; there is a second gap between the limiting body and the inner surface of the seat side wall; and there is a third gap between the limiting body and the lower surface of the connecting body.

12. The wind turbine assembly according to claim 10, characterized in that, The rotating spray arm further includes a second rotating spray arm, and the fixed base further includes a second fixed base. The second fixed base has a second base body and a connecting cover. The second base body has a first end and a second end. The second end is connected to the end of the stator shaft. An opening is provided on the first end. The connecting cover is placed on the opening and surrounds the second base body to form a liquid inlet chamber. The liquid inlet chamber is connected to the cavity. The outlet of the cleaning medium supply part is connected to the connecting cover and is connected to the liquid inlet chamber. The second rotating spray arm is sleeved on the second base body and is limited by the connecting cover.

13. The wind turbine assembly according to claim 2, characterized in that, The rotating spray arm includes a second rotating spray arm, and the fixed base includes a second fixed base. The second fixed base has a second base body and a connecting cover. The second base body has a first end and a second end. The second end is connected to one end of the stator shaft, and the other end of the stator shaft is closed. An opening is provided on the first end. The connecting cover is placed on the opening and surrounds the second base body to form a liquid inlet chamber. The liquid inlet chamber is connected to the cavity. The outlet of the cleaning medium supply part is connected to the connecting cover and is connected to the liquid inlet chamber. The second rotating spray arm is sleeved on the second base body and is limited by the connecting cover.

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

Images