Fan system of range hood

Abstract

The present invention relates to a fan system of a range hood, comprising an impeller, a base, a wheel disc and a motor, wherein a first connecting hole through which an output shaft of a power supply machine passes is provided in the middle of the wheel disc, and the wheel disc is connected to the base through a first magnetic suspension component, and the first magnetic suspension component comprises a gasket and a first permanent magnetic ring and a second permanent magnetic ring that repel each other magnetically, and the front end face of the wheel disc has an assembly set extending forward around the edge of the first connecting hole, and the first permanent magnetic ring is placed on the outer periphery of the assembly set, and the second permanent magnetic ring is placed on the outer periphery of the first permanent magnetic ring and always maintains a first gap between the second permanent magnetic ring and the first permanent magnetic ring under the action of the repulsive magnetic force, and the gasket is clamped in the first gap. The wheel disc of the present invention is suspended and connected to the base, so that no rigid collision occurs between the wheel disc and the impeller base, and the gasket is arranged in the gap between the first permanent magnetic ring and the second permanent magnetic ring, which also avoids the rigid collision between the first permanent magnetic ring and the second permanent magnetic ring, thereby achieving a better shockproof and noise reduction effect.

Description

Technical Field

[0001] The invention relates to a fan system of a range hood, in particular to a fan system of a range hood with low vibration and noise. 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 by the operation of the fan. The vibration and noise of the fan system mainly come from the aerodynamic noise generated when the impeller rotates, and the mechanical vibration noise caused by unstable airflow and poor dynamic balance of the impeller. In order to reduce the noise generated when the fan system is working, in the existing range hood fan system, since the impeller and the impeller mid-plate are rigidly connected, and the impeller mid-plate is rigidly connected to the motor shaft, the entire fan system often achieves a shock-absorbing effect through a shock-absorbing pad between the motor and the housing.

[0003] The Chinese utility model patent "A shock-absorbing structure for a range hood fan" (application number: CN201420542422.7) with authorization announcement number CN204126974U discloses a structure, which includes a fan housing, a motor, an impeller and an impeller mid-disk, the motor is fixed to the fan housing, the impeller is fixed to the impeller mid-disk, and also includes a support ring and a shock-absorbing ring, the support ring is lined with the inner wall of the shock-absorbing ring and fixed to the motor output shaft, and the shock-absorbing ring is clamped between the support ring and the inner ring of the mid-disk. The shock-absorbing structure of the range hood fan of this structure is provided with a shock-absorbing ring and a support ring lined with the inner wall of the shock-absorbing ring, and the shock-absorbing ring is clamped between the support ring and the impeller mid-disk, so that the shock-absorbing effect can be achieved between the impeller and the motor through the shock-absorbing ring, thereby greatly reducing the pneumatic and mechanical noise caused by unstable airflow and poor dynamic stability of the impeller, and the thickness of the shock-absorbing ring can be reasonably selected to adjust the shock-absorbing effect. However, the above structure can only provide vibration-proofing for the connection structure between the motor output shaft and the impeller. In actual use, a large vibration will also be generated between the impeller and the impeller base, thereby generating a large noise.

[0004] Therefore, the current connection structure between the motor and the fan housing needs to be further improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a fan system for a range hood that can always maintain a gap between the motor wheel and the impeller base to achieve vibration reduction and noise reduction effects.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a fan system of a range hood, including an impeller, a base, a disc and a motor, the base is arranged on the rear end face of the impeller, the disc is arranged in the middle of the base, and a first connecting hole is opened in the middle of the disc for the output shaft of the power supply machine to pass axially through, characterized in that it also includes a gasket and a first permanent magnet ring and a second permanent magnet ring that repel each other magnetically, the front end face of the disc has an assembly set extending forward around the edge of the first connecting hole, the first permanent magnet ring is placed on the outer periphery of the assembly set, the second permanent magnet ring is placed on the outer periphery of the first permanent magnet ring and always maintains a first gap between the second permanent magnet ring and the first permanent magnet ring under the action of the repulsive magnetic force, and the gasket is clamped in the first gap.

[0007] In the above solution, a second connection hole corresponding to the first connection hole is opened in the middle of the base, and a receiving groove arranged around the outer periphery of the second connection hole is provided on the base, and the first permanent magnet ring and the second permanent magnet ring are arranged in the cavity surrounded by the receiving groove and the wheel disc. This structure is adopted to form a relatively narrow gap between the first permanent magnet ring and the second permanent magnet ring, so as to achieve a better shockproof effect.

[0008] Preferably, the first permanent magnet ring includes a first sleeve body and a first assembly ring formed as one piece, the first sleeve body is arranged along the axial direction of the assembly sleeve, and the first assembly ring extends circumferentially outward from the rear end edge of the first sleeve body; the second permanent magnet ring includes a second sleeve body and a second assembly ring formed as one piece, the second sleeve body is arranged along the axial direction of the assembly sleeve, and the second assembly ring extends circumferentially outward from the rear end edge of the second sleeve body; the second permanent magnet ring is correspondingly sleeved on the outer shoulder of the first permanent magnet ring, and the front end face of the first permanent magnet ring is flush with the front end face of the second permanent magnet ring.

[0009] To facilitate assembly, the first permanent magnet ring is magnetically adsorbed on the outer shoulder of the assembly set, the inner wall surface of the accommodating groove matches the outer shoulder shape of the second permanent magnet ring, the second permanent magnet ring is magnetically adsorbed on the inner wall surface of the accommodating groove, and the front end faces of the first permanent magnet ring and the second permanent magnet ring are both flush with the front end face of the assembly set and form a second gap with the inner bottom wall of the accommodating groove.

[0010] In order to make the above structure fit compactly, a step surface is formed on the gasket to match the assembly position of the first permanent magnet ring, the second permanent magnet ring, the base and the wheel disc, and the edge of the gasket extends to the edge of the wheel disc.

[0011] As an improvement, the fan system also includes a fan housing and a second magnetic suspension component, the body of the motor is arranged on the fan housing, an assembly edge is arranged on the outer peripheral wall of the motor, the second magnetic suspension component at least includes a locking piece and a first suspension magnetic ring and a second suspension magnetic ring that repel each other magnetically, the outer periphery of the first suspension magnetic ring is recessed with an annular groove arranged along the circumferential direction, the second suspension magnetic ring is placed on the outer periphery of the first suspension magnetic ring and is located in the annular groove, and a suspension space is formed between the second suspension magnetic ring and the first suspension magnetic ring, the first suspension magnetic ring is provided with a first assembly hole that passes axially through, the locking piece passes through the first assembly hole to fix the second magnetic suspension component to the fan housing, and the outer peripheral wall of the second suspension magnetic ring is provided with a clamping groove that can clamp the assembly edge therein. By adopting the above structure, the second suspension magnetic ring installed with the assembly edge is always suspended in the suspension space, so that the motor body always remains suspended. This structure cooperates with the structure of the first permanent magnet ring and the second permanent magnet ring to achieve complete suspension of the motor, effectively reducing and lowering the vibration and noise generated by the motor during the operation of the fan system, ensuring the safety of the fan system operation and increasing the service life of the machine.

[0012] In the above solution, the second magnetic suspension assembly further includes an elastic pad, which is arranged in the suspension space. The elastic pad can increase the compactness of the structure, avoid rigid collision between the first suspension magnetic ring and the second suspension magnetic ring, and improve the buffering performance.

[0013] Preferably, the first suspension magnetic ring includes a first annular skeleton and a second annular skeleton that are magnetically attracted to each other, the first annular skeleton is adsorbed on the fan casing, the second annular skeleton is arranged on the front side of the first annular skeleton, and the elastic pad has a first gasket that can abut against the front end face of the first annular skeleton and a second gasket that can abut against the rear end face of the second annular skeleton.

[0014] Preferably, a first extension portion extending forward around the first assembly hole is provided in the middle part of the front end surface of the first annular skeleton, and correspondingly, a second extension portion extending backward around the first assembly hole is provided in the middle part of the rear end surface of the second annular skeleton, and the second extension portion is magnetically connected to the first extension portion, and the elastic pad has an annular gasket which is mounted on the outer periphery of the first extension portion and the second extension portion.

[0015] Further preferably, a first elastic protrusion is provided on the rear end surface of the first gasket. The first elastic protrusion includes a first elastic convex block and a second elastic convex block, the first elastic convex blocks are multiple and arranged in sequence along the edge of the first gasket, and the second elastic convex blocks are multiple and arranged in sequence along the circumference of the first extension. This structure can further buffer the force at the connection with the motor and achieve better shockproof performance.

[0016] Preferably, the first elastic protrusion and the second elastic protrusion are both shaped as a quadrangular pyramid with a small rear end and a large front end, and the side area of ​​the quadrangular pyramid close to the outer periphery of the first gasket is larger than the side area close to the center of the first gasket. With such a structure, the shockproof performance can be further improved.

[0017] Preferably, a second elastic protrusion is provided on the front end surface of the second gasket. The second elastic protrusion includes a third elastic protrusion and a fourth elastic protrusion, the third elastic protrusion is multiple and arranged in sequence along the edge of the second gasket, and the fourth elastic protrusion is multiple and arranged in sequence along the circumference of the second extension.

[0018] Preferably, the third elastic protrusion and the fourth elastic protrusion are both shaped as a quadrangular pyramid with a small front end and a large rear end, and the side area of ​​the quadrangular pyramid close to the outer periphery of the second gasket is larger than the side area close to the center of the second gasket.

[0019] As a further improvement, the second suspension magnetic ring includes a third annular frame and a fourth annular frame that are magnetically attracted to each other, the third annular frame is arranged close to the first gasket, and the fourth annular frame is arranged close to the second gasket. With this structure, on the one hand, the second magnetic suspension component is compact, and on the other hand, the positioning stability of the motor is improved, which has a better shockproof and noise avoidance effect.

[0020] To facilitate assembly, a third extension portion extending forward is provided on the front end face of the third annular skeleton, and correspondingly, a fourth extension portion extending backward and magnetically connected to the third extension portion is provided on the rear end face of the fourth annular skeleton. The outer peripheral surface of the fourth extension portion, the outer peripheral surface of the third extension portion, the front end face of the third annular skeleton, and the rear end face of the fourth annular skeleton together enclose the clamping groove.

[0021] Preferably, the outer periphery of the annular gasket is provided with a first convex ring and a second convex ring arranged in a circumferential direction and spaced apart, the first convex ring abuts against the inner circumference of the third annular skeleton, and the second convex ring abuts against the inner circumference of the fourth annular skeleton. The radial sections of the first convex ring and the second convex ring are both formed into a trapezoidal structure with a small outer portion and a large inner portion. With such a structure, the shockproof performance can be further improved.

[0022] In the above-mentioned preferred schemes, the locking member has a limit pad, a shaft portion and a screw portion arranged in sequence from front to back. When the assembly is completed, the limit pad rests on the front end face of the first suspension magnetic ring, the shaft portion passes through the first assembly hole, and the screw portion is locked and connected to the fan casing.

[0023] Preferably, the assembly edge is provided with an installation opening for connecting the second magnetic suspension component, and the installation opening is formed as a semicircular opening opened inward from the outer edge of the assembly edge, and in the assembly completed state, the edge of the semicircular opening is clamped in the clamping groove. With this structure, the contact area between the assembly edge and the second magnetic suspension component can be increased, thereby improving the positioning stability of the motor.

[0024] Compared with the prior art, the advantages of the present invention are: the wheel disc of the present invention is connected to the output shaft of the motor, and the wheel disc is suspended and connected to the impeller base through a gasket and a first permanent magnet ring and a second permanent magnet ring that repel each other magnetically, that is, there will never be a rigid collision between the wheel disc and the impeller base. At the same time, the gasket is arranged in the gap between the first permanent magnet ring and the second permanent magnet ring, which also avoids a rigid collision between the first permanent magnet ring and the second permanent magnet ring, thereby achieving a better shockproof and noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention (with the motor and fan housing hidden);

[0027] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0028] Figure 4 for Figure 2 Exploded view of the (impeller hidden);

[0029] Figure 5 for Figure 4 A schematic diagram of the structure from another angle;

[0030] Figure 6 for Figure 1 The structural diagram of part B;

[0031] Figure 7 is a schematic structural diagram of a second suspension assembly in an embodiment of the present invention;

[0032] Figure 8 for Figure 7 Exploded diagram of

[0033] Fig. 9 for Figure 8 A schematic diagram of the structure from another angle;

[0034] Fig.10 It is a schematic diagram of the exploded structure of the motor and the second suspension assembly in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below with reference to the accompanying drawings.

[0036] like Figures 1 to 10 As shown, the fan system of the range hood of this embodiment includes a fan housing 1, an impeller 3, a base 5, a wheel disc 6 and a motor 2. The impeller 3 is arranged in a volute 11 on the front side of the fan housing 1, the base 5 is arranged on the rear end surface of the impeller 3, the wheel disc 6 is arranged in the middle of the base 2, and a first connecting hole 61 is axially penetrated in the middle of the wheel disc 6, through which the output shaft of the power supply machine 2 passes.

[0037] In this embodiment, the wheel disc 6 is suspended on the base 5 through the first magnetic suspension component 7. The first magnetic suspension component 7 of this embodiment includes a gasket 71 and a first permanent magnet ring 72 and a second permanent magnet ring 73 that repel each other magnetically. The front end surface of the wheel disc 6 has a mounting sleeve 62 extending forward around the edge of the first connection hole 61. The first permanent magnet ring 72 is sleeved on the outer periphery of the mounting sleeve 62. The second permanent magnet ring 73 is sleeved on the outer periphery of the first permanent magnet ring 72 and always maintains a first gap 74 between the first permanent magnet ring 72 and the first permanent magnet ring 72 under the action of the repulsive magnetic force. The gasket 71 is clamped in the first gap 74. The first permanent magnet ring 72 and the second permanent magnet ring 73 are both made of hard magnetic materials. Specifically, a second connection hole 51 corresponding to the first connection hole 61 is opened in the middle of the base 5, and a receiving groove 52 arranged around the outer periphery of the second connection hole 51 is provided on the base 5. The first permanent magnet ring 72 and the second permanent magnet ring 73 are arranged in the cavity surrounded by the receiving groove 52 and the wheel disc 6. This structure is adopted to form a relatively narrow gap between the first permanent magnet ring 72 and the second permanent magnet ring 73, so as to achieve a better shockproof effect. The first permanent magnet ring 72 includes a first sleeve 721 and a first assembly ring 722 formed as one body, the first sleeve 721 is arranged along the axial direction of the assembly sleeve 62, and the first assembly ring 722 extends outwardly from the rear end edge of the first sleeve 721 along the circumferential direction. The second permanent magnet ring 73 includes a second sleeve 731 and a second assembly ring 732 formed as one body, the second sleeve 731 is arranged along the axial direction of the assembly sleeve 62, and the second assembly ring 732 extends outwardly from the rear end edge of the second sleeve 731 along the circumferential direction. The second permanent magnet ring 73 is correspondingly sleeved on the outer shoulder of the first permanent magnet ring 72, and the front end surface of the first permanent magnet ring 72 is flush with the front end surface of the second permanent magnet ring 73 and forms a second gap 50 with the inner bottom wall of the accommodating groove 52. In order to facilitate assembly, the first permanent magnet ring 72 is magnetically adsorbed on the outer shoulder of the assembly sleeve 62, the inner wall surface of the receiving groove 52 matches the outer shoulder shape of the second permanent magnet ring 73, the second permanent magnet ring 73 is magnetically adsorbed on the inner wall surface of the receiving groove 52, and the front end surface of the first permanent magnet ring 72 and the front end surface of the second permanent magnet ring 73 are flush with the front end surface of the assembly sleeve 62. In order to make the above structure fit compactly, a step surface 711 is formed on the gasket 71 to match the assembly position of the first permanent magnet ring 72, the second permanent magnet ring 73, the base 5 and the wheel disc 6, and the edge of the gasket 71 extends to the edge of the wheel disc 6, and the screw 100 passes through the base 5, the wheel disc 6 and the edge of the gasket 71 to lock the wheel disc 6 on the base 5.

[0038] In this embodiment, the body of the motor 2 is suspended and connected to the middle part of the fan housing 1 through the second magnetic suspension component 4. Specifically, an assembly edge 22 is provided on the outer peripheral wall of the motor 2, and the second magnetic suspension component 4 includes a locking member 41, a first suspension magnetic ring 42, a second suspension magnetic ring 43 and an elastic pad 44. The outer periphery of the first suspension magnetic ring 42 is concavely provided with an annular groove 421 arranged along the circumferential direction, and the second suspension magnetic ring 43 is sleeved on the outer periphery of the first suspension magnetic ring 42 and is located in the annular groove 421. The outer peripheral surface of the first suspension magnetic ring 42 and the inner peripheral surface of the second suspension magnetic ring 43 are magnetically repelled, so that a suspension space 40 is formed between the second suspension magnetic ring 43 and the first suspension magnetic ring 42. The elastic pad 44 is provided in the suspension space 40. The elastic pad 44 of this embodiment is formed into an I-shaped shape matching the suspension space. A first assembly hole 422 is opened in the center of the first suspension magnetic ring 42 and penetrates along the axial direction. The locking member 41 passes through the first assembly hole 422 to fix the magnetic suspension component 4 on the fan housing 1. A clamping groove 431 is provided on the outer peripheral wall of the second suspension magnetic ring 43 , in which the assembly edge 22 can be clamped, so as to be connected to the motor 2 .

[0039] In order to facilitate assembly, the first suspension magnetic ring 42 of this embodiment includes a first annular skeleton 423 and a second annular skeleton 424 that are magnetically attracted to each other, and the first annular skeleton 423 and the second annular skeleton 424 are both made of hard magnetic materials. The first annular skeleton 423 is adsorbed on the fan housing 1, and the second annular skeleton 424 is arranged on the front side of the first annular skeleton 423. The elastic pad 44 has a first gasket 441 that can abut against the front end face of the first annular skeleton 423 and a second gasket 442 that can abut against the rear end face of the second annular skeleton 424. A first extension 425 extending forward around the first assembly hole 422 is provided in the middle of the front end face of the first annular skeleton 423, and correspondingly, a second extension 426 extending backward around the first assembly hole 422 is provided in the middle of the rear end face of the second annular skeleton 424. The second extension 426 is magnetically connected to the first extension 425, and the elastic pad 44 has an annular gasket 443 that is sleeved on the outer periphery of the first extension 425 and the second extension 426. The second suspension magnetic ring 43 includes a third annular skeleton 432 and a fourth annular skeleton 433 that are magnetically attracted to each other. The third annular skeleton 432 is arranged close to the first gasket 441, and the fourth annular skeleton 433 is arranged close to the second gasket 442. A third extension portion 434 extending forward is provided on the front end surface of the third annular skeleton 432, and correspondingly, a fourth extension portion 435 extending backward and magnetically connected to the third extension portion 434 is provided on the rear end surface of the fourth annular skeleton 433. The outer peripheral surface of the fourth extension portion 435, the outer peripheral surface of the third extension portion 434, the front end surface of the third annular skeleton 432, and the rear end surface of the fourth annular skeleton 433 jointly enclose a clamping groove 431.

[0040] The first elastic protrusion 4411 is provided on the rear end surface of the first gasket 441 of this embodiment. The first elastic protrusion 4411 includes a first elastic convex block 4412 and a second elastic convex block 4413. The first elastic convex block 4412 is multiple and arranged in sequence along the edge of the first gasket 441, and the second elastic convex block 4413 is multiple and arranged in sequence along the circumference of the first extension 425. The first elastic convex block 4412 and the second elastic convex block 4413 are both shaped as a quadrangular pyramid with a small rear end and a large front end, and the side area of ​​the quadrangular pyramid close to the outer periphery of the first gasket 441 is larger than the side area close to the center of the first gasket 441. The second elastic protrusion 4421 is provided on the front end surface of the second gasket 442. The second elastic protrusion 4421 includes a third elastic protrusion 4422 and a fourth elastic protrusion 4423. The third elastic protrusion 4422 is multiple and arranged in sequence along the edge of the second gasket 442. The fourth elastic protrusion 4423 is multiple and arranged in sequence along the circumference of the second extension 426. The third elastic protrusion 4422 and the fourth elastic protrusion 4423 are both formed into a quadrangular pyramid with a small front end and a large rear end, and the side area of ​​the quadrangular pyramid close to the outer periphery of the second gasket 442 is larger than the side area close to the center of the second gasket 442. The outer periphery of the annular gasket 443 is provided with a first convex ring 4431 and a second convex ring 4432 arranged in the circumferential direction and at intervals. The first convex ring 4431 abuts against the inner circumference of the third annular skeleton 432, and the second convex ring 4432 abuts against the inner circumference of the fourth annular skeleton 433. The radial cross-sections of the first convex ring 4431 and the second convex ring 4432 are both formed into a trapezoidal structure with a small outside and a large inside, so as to further improve the shockproof performance.

[0041] The locking member 41 of this embodiment has a limit pad 411, a shaft 412 and a screw 413 arranged in sequence from front to back. In the assembled state, the limit pad 411 abuts against the front end surface of the first suspension magnetic ring 42, the shaft 412 passes through the first assembly hole 422, and the screw 413 is locked and connected to the fan housing 1. The assembly edge 22 is provided with an installation opening 221 for connecting the magnetic suspension component 4. The installation opening 221 is formed as a semicircular opening opened inward from the outer edge of the assembly edge 22. In the assembled state, the edge of the semicircular opening is clamped in the clamping groove 431. With this structure, the contact area between the assembly edge 33 and the magnetic suspension component 4 can be increased, thereby improving the positioning stability of the motor 2.

[0042] Since the wheel disc 6 in this embodiment is suspended on the base 5 through the first magnetic suspension component 7, that is, the output shaft of the motor 2 is suspended and connected to the impeller 3, and at the same time, the second suspension magnetic ring 43 equipped with the assembly edge 22 is always suspended in the suspension space 40, so that the body of the motor 2 is always kept in a suspended state, so that the motor 2 as a whole is kept in a suspended state, effectively reducing and lowering the vibration and noise generated by the motor during the operation of the fan system, ensuring the safety of the operation of the fan system, and also improving the service life of the machine.

Claims

1. A fan system for a range hood, comprising an impeller (3), a base (5), a wheel disc (6) and a motor (2), wherein the base (5) is arranged on the rear end surface of the impeller (3), the wheel disc (6) is arranged in the middle of the base (5), and a first connecting hole (61) is axially penetrated in the middle of the wheel disc (6) and an output shaft of the power supply machine (2) passes through, characterized in that: The wheel disc (6) is connected to the base (5) via a first magnetic suspension component (7); the first magnetic suspension component (7) comprises a gasket (71) and a first permanent magnet ring (72) and a second permanent magnet ring (73) that repel each other magnetically; the front end surface of the wheel disc (6) comprises an assembly sleeve (62) extending forward around the edge of the first connection hole (61); the first permanent magnet ring (72) is sleeved on the outer periphery of the assembly sleeve (62); the second permanent magnet ring (73) is sleeved on the outer periphery of the first permanent magnet ring (72) and a first gap (74) is always maintained between the second permanent magnet ring (73) and the first permanent magnet ring (72) under the action of repulsive magnetic forces; the gasket (71) is clamped in the first gap (74); A second connection hole (51) corresponding to the first connection hole (61) is formed in the middle of the base (5); a receiving groove (52) arranged around the outer periphery of the second connection hole (51) is provided on the base (5); the first permanent magnet ring (72) and the second permanent magnet ring (73) are arranged in a cavity enclosed by the receiving groove (52) and the wheel disc (6); The invention also comprises a fan housing (1) and a second magnetic suspension assembly (4), wherein the motor (2) is arranged on the fan housing (1), an outer peripheral wall of the motor (2) is provided with an assembly edge (22), the second magnetic suspension assembly (4) at least comprises a locking member (41) and a first suspension magnetic ring (42) and a second suspension magnetic ring (43) with magnetic repulsion, the outer periphery of the first suspension magnetic ring (42) is concavely provided with an annular groove (421) arranged in the circumferential direction, and the second suspension magnetic ring (43) is sleeved on the first suspension magnetic ring (41). The second suspension magnetic ring (43) is disposed on the outer periphery of the fan housing (1) and is located in the annular groove (421), and a suspension space (40) is formed between the second suspension magnetic ring (43) and the first suspension magnetic ring (42), a first assembly hole (422) extending axially therethrough is formed on the first suspension magnetic ring (42), the locking member (41) passes through the first assembly hole (422) to fix the second magnetic suspension assembly (4) on the fan housing (1), and a clamping groove (431) capable of clamping the assembly edge therein is provided on the outer peripheral wall of the second suspension magnetic ring (43).

2. The fan system of the range hood according to claim 1, characterized in that: The first permanent magnet ring (72) comprises a first sleeve (721) and a first assembly ring (722) which are integrally formed, the first sleeve (721) being arranged along the axial direction of the assembly sleeve (62), and the first assembly ring (722) extending outwardly from the rear end edge of the first sleeve (721) along the circumferential direction; the second permanent magnet ring (73) comprises a second sleeve (731) and a second assembly ring (732) which are integrally formed, the second sleeve (731) being arranged along the axial direction of the assembly sleeve (62), and the second assembly ring (732) extending outwardly from the rear end edge of the second sleeve (731) along the circumferential direction; the second permanent magnet ring (73) is correspondingly sleeved on the outer shoulder of the first permanent magnet ring (72), and the front end surface of the first permanent magnet ring (72) is flush with the front end surface of the second permanent magnet ring (73).

3. The fan system of the range hood according to claim 2, characterized in that: The first permanent magnet ring (72) is magnetically adsorbed on the outer shoulder of the assembly sleeve (62); the inner wall surface of the accommodating groove (52) matches the outer shoulder shape of the second permanent magnet ring (73); the second permanent magnet ring (73) is magnetically adsorbed on the inner wall surface of the accommodating groove (52); the front end surface of the first permanent magnet ring (72) and the front end surface of the second permanent magnet ring (73) are both flush with the front end surface of the assembly sleeve (62), and a second gap (50) is formed between the inner bottom wall of the accommodating groove (52).

4. The fan system of the range hood according to claim 2, characterized in that: The gasket (71) is formed with a step surface (711) that matches the assembly positions of the first permanent magnet ring (72), the second permanent magnet ring (73), the base (5) and the wheel disc (6), and the edge of the gasket (71) extends to the edge of the wheel disc (6).

5. The fan system of a range hood according to any one of claims 1 to 4, characterized in that: The second magnetic suspension component (4) further comprises an elastic pad (44), wherein the elastic pad (44) is arranged in the suspension space (40).

6. The fan system of the range hood according to claim 5, characterized in that: The first suspension magnetic ring (42) comprises a first annular frame (423) and a second annular frame (424) that are magnetically attracted to each other, the first annular frame (423) being adsorbed on the fan housing (1), the second annular frame (424) being arranged on the front side of the first annular frame (423), and the elastic pad (44) comprising a first gasket (441) that can abut against the front end surface of the first annular frame (423) and a second gasket (442) that can abut against the rear end surface of the second annular frame (424).

7. The fan system of the range hood according to claim 6, characterized in that: A first extension portion (425) extending forward around the first assembly hole (422) is provided in the middle of the front end surface of the first annular skeleton (423); correspondingly, a second extension portion (426) extending backward around the first assembly hole (422) is provided in the middle of the rear end surface of the second annular skeleton (424); the second extension portion (426) is magnetically connected to the first extension portion (425); and the elastic pad (44) has an annular gasket (443) which is sleeved on the outer periphery of the first extension portion (425) and the second extension portion (426).

8. The fan system of the range hood according to claim 6, characterized in that: A first elastic protrusion (4411) is provided on the rear end surface of the first gasket (441); and a second elastic protrusion (4421) is provided on the front end surface of the second gasket (442).

9. The fan system of the range hood according to claim 7, characterized in that: The second suspension magnetic ring (43) comprises a third annular frame (432) and a fourth annular frame (433) that are magnetically attracted to each other, the third annular frame (432) being arranged close to the first gasket (441), and the fourth annular frame (433) being arranged close to the second gasket (442).

10. The fan system of the range hood according to claim 9, characterized in that: A third extension portion (434) extending forward is provided on the front end face of the third annular skeleton (432), and correspondingly, a fourth extension portion (435) extending backward and magnetically connected to the third extension portion (434) is provided on the rear end face of the fourth annular skeleton (433), wherein the outer peripheral surface of the fourth extension portion (435) and the outer peripheral surface of the third extension portion (434), the front end face of the third annular skeleton (432), and the rear end face of the fourth annular skeleton (433) together enclose the clamping groove (431).

11. The fan system of the range hood according to claim 9, characterized in that: The outer periphery of the annular gasket (443) is provided with a first convex ring (4431) and a second convex ring (4432) which are arranged in a circumferential direction and at intervals. The first convex ring (4431) abuts against the inner circumference of the third annular skeleton (432), and the second convex ring (4432) abuts against the inner circumference of the fourth annular skeleton (433).

12. The fan system of a range hood according to any one of claims 1 to 4, characterized in that: The locking member (41) comprises a limit pad (411), a shaft portion (412) and a screw portion (413) which are arranged in sequence from front to back. In an assembled state, the limit pad (411) abuts against the front end surface of the first suspension magnetic ring (42), the shaft portion (412) passes through the first assembly hole (422), and the screw portion (413) is locked and connected to the fan housing (1).

13. The fan system of a range hood according to any one of claims 1 to 4, characterized in that: The assembly edge (22) is provided with an installation opening (221) for connecting the second magnetic suspension component (4), and the installation opening (221) is formed as a semicircular opening opened inward from the outer edge of the assembly edge. In the assembly completed state, the edge of the semicircular opening is clamped in the clamping groove (431).

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