Fan system of range hood and range hood

Abstract

The utility model relates to the technical field of range hoods, and particularly discloses a fan system of a range hood and the range hood. According to the fan system of the range hood, the rotor assembly of the motor unit is connected with the impeller, and meanwhile, the rotor assembly is in magnetic suspension connection with the stator assembly, so that the rotor assembly is kept in a suspension state, and noise generated when the motor unit works is reduced; the stator assembly is limited on the volute in the axial direction of the volute, the stator assembly can move relative to the volute, the technical scheme that a motor unit is rigidly connected with the volute in the prior art is replaced, and the damping and noise reduction effects are optimized; in addition, the stator assembly moves to drive the rotor assembly to move, the impeller moves along with the rotor assembly, airflow flowing in a blade runner of the impeller can be optimized, the airflow flowing stability is improved, and aerodynamic noise generated when the impeller rotates is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a fan system of a range hood and the range hood. Background Art

[0002] At present, the range hood has become one of the essential kitchen appliances in ordinary families. When the range hood is working, the oil smoke is sucked and exhausted through the operation of the fan system. The vibration and noise of the fan system mainly come from the noise of motor vibration, the aerodynamic noise generated when the impeller rotates, and the mechanical vibration noise caused by unstable airflow and poor dynamic balance of the impeller.

[0003] In order to reduce the noise generated when the motor is working, in the prior art, the motor in the fan system is fixed by a motor shock pad to achieve vibration reduction and noise reduction when the motor drives the impeller to rotate. However, the motor in the prior art is rigidly connected to the volute through the motor bracket, and although the motor shock pad is provided, the effect of vibration reduction and noise reduction is poor. Utility Model Content

[0004] The utility model aims to provide a fan system of a range hood and a range hood, which optimizes the effect of vibration reduction and noise reduction and improves the user experience.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] In one aspect, a fan system for a range hood is provided, comprising:

[0007] snail shell;

[0008] An impeller is eccentrically arranged in the volute;

[0009] The motor unit includes a stator assembly and a rotor assembly. The rotor assembly is magnetically suspended and connected to the stator assembly. The rotor assembly is connected to the impeller. The stator assembly is limited on the volute along the axial direction of the volute, and the stator assembly can move relative to the volute.

[0010] As an optional technical solution of the fan system of the range hood, the rotor assembly includes a motor body, one end of the motor body is provided with a motor shaft, the motor shaft is connected to the impeller, and the circumferential side wall of the motor body is provided with a plurality of permanent magnets;

[0011] The stator assembly includes a magnetic suspension seat, which has a mounting hole through which the power supply machine body passes. The hole wall of the mounting hole is provided with a receiving cavity for receiving a permanent magnet. A magnetic suspension winding is provided at a position corresponding to the hole wall of the mounting hole and the receiving cavity.

[0012] As an optional technical solution for the fan system of the above-mentioned range hood, the magnetic levitation seat includes an annular bracket, the space enclosed by the bracket is a mounting hole, a plurality of bracket shells are arranged at intervals along the circumference of the bracket, each bracket shell is provided with a accommodating cavity connected to the mounting hole, and a magnetic levitation winding is provided on the outer wall of the bracket shell surrounding the accommodating cavity.

[0013] As an optional technical solution for the fan system of the above-mentioned range hood, at least two brackets are provided, at least two brackets are coaxial and spaced apart, each bracket shell is respectively connected to at least two brackets, each bracket shell is respectively provided with a accommodating cavity, and a gap between the accommodating cavity and the bracket is correspondingly arranged.

[0014] As an optional technical solution for the fan system of the above-mentioned range hood, a base is provided at one end of the magnetic levitation seat, a chassis is provided on the volute, the base is connected to the chassis, and the base is limited on the chassis along the axial direction of the volute, and the base can move relative to the chassis.

[0015] As an optional technical solution for the fan system of the above-mentioned range hood, an air inlet is provided on one side of the volute, an opening opposite to the air inlet is provided on the other side of the volute, a chassis is arranged at the opening, the chassis is annular in shape, and the chassis is arranged around the opening.

[0016] As an optional technical solution for the fan system of the above-mentioned range hood, a circle with the center of the volute tongue of the volute as the center and the distance from the center of the volute tongue to the center of the air inlet of the volute as the radius is defined as the impeller motion trajectory, and the stator assembly moves along the impeller motion trajectory.

[0017] As an optional technical solution for the above-mentioned range hood fan system, the range hood fan system also includes a drive unit, one end of the drive unit is connected to the stator assembly, and the other end of the drive unit is connected to the volute, and the drive unit is used to drive the stator assembly to move along the impeller motion trajectory.

[0018] As an optional technical solution for the fan system of the above-mentioned range hood, the driving unit includes a transmission assembly and a driver. The driver is arranged on the stator assembly. The driver is drivingly connected to one end of the transmission assembly, and the other end of the transmission assembly is connected to the volute. The driver drives the stator assembly to move along the motion trajectory of the impeller through the transmission assembly.

[0019] As an optional technical solution for the fan system of the above-mentioned range hood, the transmission assembly includes a rack and a gear meshing with the rack, the gear is connected to the driving end of the driver, the stator assembly includes a rack fixing frame and a driver bracket, the driver is arranged on the driver bracket, the two ends of the rack are connected to the volute, and the rack slides through the rack fixing frame, and the rack is an arc-shaped member that coincides with the motion trajectory of the impeller.

[0020] On the other hand, a range hood is provided, comprising a fan system of any one of the range hoods described above.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a fan system for a range hood, in which a rotor assembly of a motor unit is connected to an impeller, and at the same time, the rotor assembly is magnetically levitated to a stator assembly, so that the rotor assembly remains in a suspended state, thereby reducing the noise generated when the motor unit is working; the stator assembly is limited on the volute along the axial direction of the volute, and the stator assembly can move relative to the volute, thereby replacing the technical solution of rigid connection between the motor unit and the volute in the prior art, thereby optimizing the effect of damping and noise reduction; in addition, the movement of the stator assembly can drive the movement of the rotor assembly, and the impeller moves with the rotor assembly, thereby optimizing the airflow in the blade flow channel of the impeller, improving the stability of the airflow, and reducing the aerodynamic noise generated when the impeller rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a fan system of a range hood provided by an embodiment of the utility model from a first perspective;

[0024] Figure 2 is a cross-sectional view of a fan system of a range hood provided by an embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of a rotor assembly provided by an embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of a stator assembly provided in an embodiment of the utility model;

[0027] Figure 5 It is a structural schematic diagram of a fan system of a range hood provided by an embodiment of the utility model from a second viewing angle;

[0028] Figure 6 It is a structural schematic diagram of the impeller position provided by an embodiment of the utility model;

[0029] Figure 7 It is a structural schematic diagram of a motor unit provided in an embodiment of the utility model;

[0030] Figure 8 It is a structural schematic diagram of an impeller provided by an embodiment of the utility model in a first impeller position;

[0031] Fig. 9 It is a structural schematic diagram of an impeller provided in an embodiment of the utility model in a second impeller position.

[0032] In the figure:

[0033] 1. Volute; 2. Impeller; 3. Motor unit; 4. Drive unit;

[0034] 11. chassis; 12. air inlet; 13. opening; 14. air outlet; 15. snail tongue;

[0035] 31. stator assembly; 311. magnetic suspension seat; 3111. bracket; 3112. bracket shell; 312. mounting hole; 313. accommodating cavity; 314. magnetic suspension winding; 315. base; 316. rack fixing frame; 317. driver bracket; 32. rotor assembly; 321. motor body; 322. motor shaft; 323. permanent magnet;

[0036] 41. Transmission assembly; 411. Rack; 412. Gear; 42. Driver;

[0037] O1, center of the snail tongue; O2, center of the air inlet;

[0038] a1, impeller motion trajectory; a2, first impeller position; a3, second impeller position. DETAILED DESCRIPTION

[0039] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] like Figure 1 and Figure 2 As shown, this embodiment provides a fan system for a range hood, the fan system comprising a volute 1, an impeller 2 and a motor unit 3. The impeller 2 is eccentrically rotatably arranged in the volute 1, the motor unit 3 comprises a stator assembly 31 and a rotor assembly 32, the rotor assembly 32 is magnetically suspended and connected to the stator assembly 31, the rotor assembly 32 is connected to the impeller 2, the stator assembly 31 is limited on the volute 1 along the axial direction of the volute 1, and the stator assembly 31 can move relative to the volute 1.

[0043] In the fan system of the range hood provided in this embodiment, the rotor assembly 32 of the motor unit 3 is connected to the impeller 2, and the rotor assembly 32 is magnetically suspended with the stator assembly 31, so that the rotor assembly 32 remains in a suspended state, thereby reducing the noise generated when the motor unit 3 is working; the stator assembly 31 is limited on the volute 1 along the axial direction of the volute 1, and the stator assembly 31 can move relative to the volute 1, replacing the technical solution of rigid connection between the motor unit 3 and the volute 1 in the prior art, thereby optimizing the effect of shock absorption and noise reduction; in addition, the movement of the stator assembly 31 can drive the movement of the rotor assembly 32, and the impeller 2 moves with the rotor assembly 32, which can optimize the airflow in the blade flow channel of the impeller 2, improve the stability of the airflow, and reduce the aerodynamic noise generated by the impeller 2 when it rotates.

[0044] The volute 1 has an air inlet 12 and an air outlet 14, and the volute tongue 15 is disposed adjacent to the air outlet 14 of the volute 1. The impeller 2 is disposed in the volute 1, and the impeller 2 rotates to discharge the air entering the volute 1 through the air inlet 12 through the air outlet 14.

[0045] In some embodiments, Figure 2 , Figure 3 and Figure 4As shown, the rotor assembly 32 includes a motor body 321, one end of the motor body 321 is provided with a motor shaft 322, the motor shaft 322 is connected to the impeller 2, and the circumferential side wall of the motor body 321 is provided with a plurality of permanent magnets 323. The stator assembly 31 includes a magnetic suspension seat 311, the magnetic suspension seat 311 has a mounting hole 312 for the motor body 321 to penetrate, the hole wall of the mounting hole 312 is provided with a receiving cavity 313, the receiving cavity 313 is used to receive the permanent magnet 323, and a magnetic suspension winding 314 is provided at a position corresponding to the hole wall of the mounting hole 312 and the receiving cavity 313. The magnetic suspension winding 314 is energized to put the motor body 321 in a suspended state, and the motor body 321 will not contact the magnetic suspension seat 311, thereby blocking the vibration transmission between the rotor assembly 32 and the magnetic suspension seat 311 when working, optimizing the effect of damping and noise reduction, and avoiding the occurrence of resonance and abnormal sound of the motor unit 3 when working.

[0046] Further optionally, the magnetic levitation seat 311 includes an annular bracket 3111, the space enclosed by the bracket 3111 is a mounting hole 312, a plurality of bracket shells 3112 are arranged at circumferential intervals along the bracket 3111, each bracket shell 3112 is provided with a accommodating cavity 313 connected to the mounting hole 312, and a magnetic levitation winding 314 is provided on the outer wall surrounding the accommodating cavity 313 in the bracket shell 3112, and the relative position of the permanent magnet 323 and the magnetic levitation winding 314 can be located by the arranged accommodating cavity 313.

[0047] In some embodiments, the magnetic suspension seat 311 includes a bracket 3111 , and a hole connecting the accommodating cavity 313 and the mounting hole 312 is opened on the side wall of the bracket 3111 .

[0048] In other embodiments, the magnetic suspension seat 311 includes at least two annular brackets 3111, at least two brackets 3111 are coaxial and spaced apart, and the space enclosed by the brackets 3111 is a mounting hole 312, that is, at least two brackets 3111 are penetrated by the motor body 321. A plurality of bracket shells 3112 are spaced apart along the circumference of the bracket 3111, each bracket shell 3112 is respectively connected to at least two brackets 3111, and each bracket shell 3112 is respectively recessed with a receiving cavity 313, which is correspondingly arranged at a gap between the receiving cavity 313 and the bracket 3111, and a magnetic suspension winding 314 is arranged on the outer wall of the bracket shell 3112 surrounding the receiving cavity 313, which has a simple structure and can locate the relative position of the permanent magnet 323 and the magnetic suspension winding 314.

[0049] A plurality of permanent magnets 323 are arranged at equal intervals in the circumferential direction of the motor body 321, and a magnetic suspension winding 314 is arranged on the magnetic suspension seat 311 at a position corresponding to the permanent magnet 323. The magnetic suspension winding 314 can provide suspension force for the motor body 321, and the motor body 321 is subjected to uniform force, so that the motor body 321 remains in a suspended state.

[0050] Further optionally, a base 315 is provided at one end of the magnetic suspension seat 311, a chassis 11 is provided on the volute 1, the base 315 is connected to the chassis 11, and the base 315 is limited on the chassis 11 along the axial direction of the volute 1, and the base 315 can move relative to the chassis 11. The base 315 and the chassis 11 are provided to facilitate the connection of the stator assembly 31 with the volute 1.

[0051] Combination Figure 2 and Figure 5 As shown, the chassis 11 is arranged at the opening 13 of the volute 1 and the air inlet 12 of the volute 1, the chassis 11 is annular, and the chassis 11 is arranged around the opening 13. The magnetic suspension seat 311 and the motor body 321 are passed through the chassis 11 and placed in the volute 1. The motor shaft 322 is connected to the impeller 2, and the base 315 is connected to the chassis 11. The chassis 11 closes the opening 13, and the chassis 11 is arranged in an annular shape, which provides an avoidance space for the installation of the magnetic suspension seat 311 and the motor body 321.

[0052] The chassis 11 is recessed into the volute 1 at the opening 13 of the volute 1, and the chassis 11 has an inclined surface and a plane connected in sequence, one end of the inclined surface is connected to the volute 1, and the chassis 11 is arranged at the opening 13 to form a trumpet shape, and the base 315 is an annular structure formed by extending outward along the circumference of one end of the magnetic suspension seat 311. After the magnetic suspension seat 311 is installed in place, the base 315 fits with the plane of the chassis 11, and the base 315 is placed in the volute 1, and the chassis 11 plays a role in limiting the base 315 in the volute 1.

[0053] like Figure 2 and Figure 6 As shown, the stator assembly 31 can move relative to the volute 1. Specifically, in some embodiments, a circle with the center O1 of the volute tongue of the volute 1 as the center and the distance from the center O1 of the volute tongue to the center O2 of the air inlet 12 of the volute 1 as the radius is defined as the impeller motion trajectory a1, and the stator assembly 31 moves along the impeller motion trajectory a1. This setting can ensure that the distance between the lowest point of the impeller 2 and the volute tongue 15 is always consistent. When the position of the impeller 2 is adjusted, the gap between the impeller 2 and the volute tongue 15 will not change, and thus will not cause the pressure in the volute 1 to drop, optimize the airflow in the blade flow channel of the impeller 2, improve the stability of the airflow, and reduce the aerodynamic noise generated by the impeller 2 when it rotates. Exemplarily, when the impeller 2 is in the first impeller position a2, the distance between the impeller 2 and the lowest point of the volute tongue 15 is d1, and when the impeller 2 is in the second impeller position a3, the distance between the impeller 2 and the lowest point of the volute tongue 15 is d2, wherein d1=d2 proves that when the position of the impeller 2 is adjusted, the gap between the impeller 2 and the volute tongue 15 will not change.

[0054] Continue to refer to Figure 2 and Figure 6As shown, the fan system of the range hood also includes a drive unit 4, one end of the drive unit 4 is connected to the stator assembly 31, and the other end of the drive unit 4 is connected to the volute 1. The drive unit 4 is used to drive the stator assembly 31 to move along the impeller motion trajectory a1. The stator assembly 31 drives the impeller 2 to move along the impeller motion trajectory a1 through the rotor assembly 32, so that the gap between the impeller 2 and the volute tongue 15 does not change, and the position of the impeller 2 can be automatically adjusted. Compared with the solution in the prior art that the position of the impeller 2 cannot be adjusted, the aerodynamic noise generated by the impeller 2 when rotating can be reduced. In addition, the impeller 2 is always eccentrically arranged relative to the volute 1, which can improve the air intake state in the volute 1 and reduce the flow separation of the impeller 2 from the air inside, thereby improving the working efficiency of the fan system and reducing the noise of the fan system.

[0055] Optionally, combined Figure 2 , Figure 7 and Figure 8 As shown, the driving unit 4 includes a transmission assembly 41 and a driver 42. The driver 42 is arranged on the stator assembly 31. The driver 42 is drivingly connected to one end of the transmission assembly 41. The other end of the transmission assembly 41 is connected to the volute 1. The driver 42 drives the stator assembly 31 to move along the impeller motion trajectory a1 through the transmission assembly 41. The driving unit 4 plays a role in connecting the volute 1 and the stator assembly 31, and can also make the stator assembly 31 move relative to the volute 1 along the impeller motion trajectory a1.

[0056] Further, the transmission assembly 41 includes a rack 411 and a gear 412, the gear 412 meshes with the rack 411, and the gear 412 is connected to the driving end of the driver 42. The stator assembly 31 includes a rack fixing frame 316 and a driver bracket 317. The driver 42 is arranged on the driver bracket 317. The two ends of the rack 411 are connected to the volute 1, and the rack 411 slides through the rack fixing frame 316. The rack 411 is an arc-shaped member that coincides with the impeller motion trajectory a1. The driver 42 drives the gear 412 to rotate, the gear 412 meshes with the rack 411, and the gear 412 can move along the extension direction of the rack 411, thereby causing the stator assembly 31 to move along the impeller motion trajectory a1, and the stator assembly 31 drives the impeller 2 to displace through the rotor assembly 32, so that the air intake state in the volute 1 is improved, and the flow separation of the impeller 2 to the internal air is reduced, thereby improving the working efficiency of the fan system and reducing the noise of the fan system.

[0057] In order to facilitate the meshing of the gear 412 and the rack 411, the teeth of the rack 411 are arranged on the outer arc surface of the rack 411. The rack fixing frame 316 is arranged on the base 315 of the stator assembly 31. Specifically, the rack fixing frame 316 includes two fixing plates arranged opposite to each other, and the fixing plates are provided with a through-hole, and the rack 411 is passed through the through-hole. The matching structure of the rack 411 and the rack fixing frame 316 defines the axial position of the stator assembly 31 in the volute 1. The rack 411 can slide in the through-hole, and the stator assembly 31 can move relative to the volute 1.

[0058] The driver bracket 317 is disposed on the rack fixing frame 316, and the gear 412 is disposed close to the rack 411, so that the gear 412 can directly mesh with the rack 411. Both ends of the rack 411 are connected to the chassis 11 disposed on the volute 1.

[0059] The position of the impeller 2 in the volute 1 can be adjusted. Figure 8 FIG. 2 is a schematic diagram showing the impeller 2 in the first impeller position a2. Fig. 9 It is a schematic diagram of the impeller 2 being in the second impeller position a3. The impeller 2 can also move along the impeller motion trajectory a1 to other positions, which are not listed here one by one.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. The fan system of the range hood, It is characterized in that include: volute (1); An impeller (2) is eccentrically rotatably disposed in the volute (1); A motor unit (3), the motor unit (3) comprising a stator assembly (31) and a rotor assembly (32), the rotor assembly (32) being magnetically suspended and connected to the stator assembly (31), the rotor assembly (32) being connected to the impeller (2), the stator assembly (31) being limited on the volute (1) along the axial direction of the volute (1), and the stator assembly (31) being movable relative to the volute (1).

2. The fan system of the range hood according to claim 1, It is characterized in that The rotor assembly (32) comprises a motor body (321), one end of the motor body (321) is provided with a motor shaft (322), the motor shaft (322) is connected to the impeller (2), and the circumferential side wall of the motor body (321) is provided with a plurality of permanent magnets (323); The stator assembly (31) comprises a magnetic suspension seat (311), the magnetic suspension seat (311) having a mounting hole (312) for the motor body (321) to pass through, a hole wall of the mounting hole (312) being provided with a receiving cavity (313), the receiving cavity (313) being used to receive a permanent magnet (323), and a magnetic suspension winding (314) being provided at a position of the hole wall of the mounting hole (312) corresponding to the receiving cavity (313).

3. The fan system of the range hood according to claim 2, It is characterized in that The magnetic suspension seat (311) comprises an annular bracket (3111); the space enclosed by the bracket (3111) is the mounting hole (312); a plurality of bracket shells (3112) are arranged at intervals along the circumference of the bracket (3111); each bracket shell (3112) is provided with a receiving cavity (313) connected to the mounting hole (312); and the magnetic suspension winding (314) is arranged on the outer side wall of the bracket shell (3112) surrounding the receiving cavity (313).

4. The fan system of the range hood according to claim 3, It is characterized in that At least two of the brackets (3111) are provided, and at least two of the brackets (3111) are coaxial and spaced apart. Each of the bracket shells (3112) is respectively connected to at least two of the brackets (3111). Each of the bracket shells (3112) is respectively provided with a recessed accommodating cavity (313), and the accommodating cavity (313) is correspondingly provided at a gap between the brackets (3111).

5. The fan system of the range hood according to claim 2, It is characterized in that A base (315) is provided at one end of the magnetic suspension seat (311), a chassis (11) is provided on the volute (1), the base (315) is connected to the chassis (11), and the base (315) is limited on the chassis (11) along the axial direction of the volute (1), and the base (315) can move relative to the chassis (11).

6. The fan system of the range hood according to claim 5, It is characterized in that An air inlet (12) is provided on one side of the volute (1), an opening (13) opposite to the air inlet (12) is provided on the other side of the volute (1), the chassis (11) is arranged at the opening (13), the chassis (11) is annular in shape, and the chassis (11) is arranged around the opening (13).

7. The fan system of the range hood according to claim 1, It is characterized in that A circle with the center (O1) of the volute tongue of the volute (1) as the center and the distance from the center (O1) of the volute tongue to the center (O2) of the air inlet (12) of the volute (1) as the radius is defined as an impeller motion trajectory (a1), and the stator assembly (31) moves along the impeller motion trajectory (a1).

8. The fan system of the range hood according to claim 7, It is characterized in that The fan system of the range hood further comprises a driving unit (4), one end of the driving unit (4) being connected to the stator assembly (31), and the other end of the driving unit (4) being connected to the volute (1), and the driving unit (4) being used to drive the stator assembly (31) to move along the impeller motion trajectory (a1).

9. The fan system of the range hood according to claim 8, It is characterized in that The driving unit (4) comprises a transmission assembly (41) and a driver (42); the driver (42) is arranged on the stator assembly (31); the driver (42) is drivingly connected to one end of the transmission assembly (41); the other end of the transmission assembly (41) is connected to the volute (1); the driver (42) drives the stator assembly (31) to move along the impeller motion trajectory (a1) through the transmission assembly (41).

10. The fan system of the range hood according to claim 9, It is characterized in that The transmission assembly (41) comprises a rack (411) and a gear (412) meshing with the rack (411); the gear (412) is connected to a driving end of the driver (42); the stator assembly (31) comprises a rack fixing frame (316) and a driver bracket (317); the driver (42) is arranged on the driver bracket (317); both ends of the rack (411) are connected to the volute (1); the rack (411) is slidably inserted through the rack fixing frame (316); and the rack (411) is an arc-shaped member that coincides with the motion trajectory (a1) of the impeller.

11. A range hood, It is characterized in that A fan system comprising the range hood according to any one of claims 1-10.

Images