Fan system of range hood

Abstract

The present invention relates to a fan system of a range hood, comprising a fan housing, a motor, an impeller, and a magnetic suspension component, wherein the motor is arranged on the fan housing, an assembly edge is arranged on the outer peripheral wall of the motor, and the magnetic suspension component comprises a locking member and a first suspension magnetic ring and a second suspension magnetic ring with magnetic repulsion, the outer periphery of the first suspension magnetic ring is concavely provided with an annular groove arranged along the circumferential direction, the second suspension magnetic ring is sleeved on the outer periphery of the first suspension magnetic ring and is located in the annular groove, a suspension space is formed between the second suspension magnetic ring and the first suspension magnetic ring, a first assembly hole is opened on the first suspension magnetic ring and penetrates along the axial direction, the locking member passes through the first assembly hole to fix the magnetic suspension component on the fan housing, and a clamping groove in which the assembly edge can be clamped is arranged on the outer peripheral wall of the second suspension magnetic ring. The second suspension magnetic ring with the assembly edge is always suspended in the suspension space, so that the motor body is always kept suspended, and the vibration and noise generated by the motor during the operation of the fan system are effectively reduced.

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 capable of reducing vibration. 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] For example, in the "A Low-Noise Range Hood Fan Structure" disclosed in the Chinese utility model patent with patent number ZL01239216.2 (authorization announcement number CN2485562Y), the motor housing and the fan housing of the fan are connected as one by a number of screws, and the screws are lined with shock-absorbing pads made of elastic material. The shock-absorbing pads are preferably in a compressed state after installation. Since the installation screws are lined with shock-absorbing pads, the connection between the motor and the fan housing is an elastic connection, thereby effectively reducing noise. The defect of this shock-absorbing structure is that the shock-absorbing pads have been compressed during installation, and the actual shock-absorbing effect is poor.

[0004] Therefore, the current connection structure between the motor housing 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 of a range hood which can keep the motor body in a suspended state all the time, thereby achieving the effect of shock absorption and noise reduction.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a fan system of a range hood, including a fan housing, a motor and an impeller, the motor is arranged on the fan housing, the impeller is connected to the output shaft of the motor, and an assembly edge is arranged on the outer peripheral wall of the motor, characterized in that: it also includes a magnetic suspension component, the 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 concavely provided with an annular groove arranged along the circumferential direction, the second suspension magnetic ring is sleeved 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 penetrates axially, the locking piece passes through the first assembly hole to fix the magnetic suspension component on the fan housing, and the outer peripheral wall of the second suspension magnetic ring is provided with a clamping groove in which the assembly edge can be clamped.

[0007] In the above solution, the 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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 magnetic suspension assembly structure is compact, and on the other hand, the positioning stability of the motor is improved, which has a better shockproof and noise avoidance effect.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] Preferably, the assembly edge is provided with an installation opening for connecting the 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 magnetic suspension component can be increased, thereby improving the positioning stability of the motor.

[0019] Compared with the prior art, the advantages of the present invention are: the present invention installs the motor on the fan casing through a magnetic suspension component, the second suspension magnetic ring is placed on the outer periphery of the first suspension magnetic ring and a suspension space is formed between the second suspension magnetic ring and the first suspension magnetic ring, the first suspension magnetic ring is fixed on the fan casing, and a clamping groove in which the assembly edge can be clamped is provided on the outer peripheral wall of the second suspension magnetic ring. Since the second suspension magnetic ring with the assembly edge is always suspended in the suspension space, the motor body is always kept suspended, which effectively reduces and lowers the vibration and noise generated by the motor during the operation of the fan system, ensures the safety of the operation of the fan system, and also improves the service life of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0022] Figure 3 This is a schematic diagram of the structure of a magnetic suspension assembly in an embodiment of the present invention;

[0023] Figure 4 for Figure 3 Exploded diagram of

[0024] Figure 5 for Figure 3 Exploded view from another angle;

[0025] Figure 6 It is an exploded view of the magnetic suspension assembly and the motor in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 6 As shown, the fan system of the range hood of this embodiment includes a fan housing 1, a motor 2, an impeller 3 and a magnetic suspension component 4. The motor 2 is arranged on the fan housing 1, the impeller 3 is connected to the output shaft 21 of the motor 2, and an assembly edge 22 is arranged on the outer peripheral wall of the motor 2. The magnetic suspension component 4 is used to install the motor 2 on the fan housing 1 and to always maintain a gap between the motor 2 and the fan housing 1, even if the body of the motor 2 always remains in a suspended state.

[0028] In this embodiment, the magnetic suspension assembly 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. 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 arranged in the suspension space 40. The elastic pad 44 of this embodiment is formed into an I-shaped shape matching the suspension space. The center of the first suspension magnetic ring 42 is provided with a first assembly hole 422 that passes through in the axial direction. The locking member 41 passes through the first assembly hole 422 to fix the magnetic suspension assembly 4 on the fan housing 1. The outer peripheral wall of the second suspension magnetic ring 43 is provided with a clamping groove 431 that can clamp the assembly edge 22 therein, so as to connect with the motor 2.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Since the second suspension magnetic ring 43 with the assembly edge 22 in this embodiment is always suspended in the suspension space 40, the motor 2 body is always kept suspended, which effectively reduces and lowers the vibration and noise generated by the motor during the operation of the fan system, ensures the safety of the fan system operation, and improves the service life of the machine.

Claims

1. A fan system for a range hood, comprising a fan housing (1), a motor (2) and an impeller (3), wherein the motor (2) is arranged on the fan housing (1), the impeller (3) is connected to an output shaft (21) of the motor (2), and an assembly edge (22) is arranged on the outer peripheral wall of the motor (2), characterized in that: The invention also comprises a magnetic suspension component (4), which at least comprises a locking member (41) and a first suspension magnetic ring (42) and a second suspension magnetic ring (43) that repel each other magnetically, the outer periphery of the first suspension magnetic ring (42) is provided with an annular groove (421) arranged along the circumferential direction, 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), and a suspension space (40) is formed between the second suspension magnetic ring (43) and the first suspension magnetic ring (42), the first suspension magnetic ring (42) is provided with a first assembly hole (422) that penetrates in the axial direction, the locking member (41) passes through the first assembly hole (422) to fix the magnetic suspension component (4) on the fan casing (1), and the outer peripheral wall of the second suspension magnetic ring (43) is provided with a clamping groove (431) that can clamp the assembly edge therein; The magnetic suspension component (4) further comprises an elastic pad (44), which is arranged in the suspension space (40); the first suspension magnetic ring (42) comprises a first annular frame (423) and a second annular frame (424) which 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), the elastic pad (44) comprising a first gasket (441) which can abut against the front end surface of the first annular frame (423) and a second gasket (442) which can abut against the rear end surface of the second annular frame (424); the front end of the first annular frame (423) A first extension portion (425) extending forward around the first assembly hole (422) is provided in the middle of the face, and correspondingly, a second extension portion (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), and the second extension portion (426) is magnetically connected to the first extension portion (425), and the elastic pad (44) has an annular gasket (443) sleeved on the outer periphery of the first extension portion (425) and the second extension portion (426); a first elastic protrusion (4411) is provided on the rear end face of the first gasket (441); and a second elastic protrusion (4421) is provided on the front end face of the second gasket (442).

2. The fan system of the range hood according to claim 1, characterized in that: The first elastic protrusion (4411) includes a first elastic protrusion (4412) and a second elastic protrusion (4413), wherein the first elastic protrusion (4412) is multiple and is arranged in sequence along the edge of the first gasket (441), and the second elastic protrusion (4413) is multiple and is arranged in sequence along the circumference of the first extension portion (425).

3. The fan system of the range hood according to claim 2, characterized in that: The first elastic protrusion (4412) and the second elastic protrusion (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).

4. The fan system of the range hood according to claim 3, characterized in that: The second elastic protrusion (4421) includes a third elastic protrusion (4422) and a fourth elastic protrusion (4423), wherein the third elastic protrusion (4422) is multiple and is arranged in sequence along the edge of the second gasket (442), and the fourth elastic protrusion (4423) is multiple and is arranged in sequence along the circumference of the second extension portion (426).

5. The fan system of the range hood according to claim 4, characterized in that: The third elastic protrusion (4422) and the fourth elastic protrusion (4423) 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 (442) is larger than the side area close to the center of the second gasket (442).

6. The fan system of the range hood according to any one of claims 1 to 5, 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).

7. The fan system of the range hood according to claim 6, 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).

8. The fan system of the range hood according to claim 6, 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).

9. The fan system of the range hood according to claim 8, characterized in that: 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 outer portion and a large inner portion.

10. The fan system of a range hood according to any one of claims 1 to 5, 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).

11. The fan system of a range hood according to any one of claims 1 to 5, characterized in that: The assembly edge (22) is provided with an installation opening (221) for connecting the 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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