Fan system and range hood

Abstract

The utility model relates to a fan system which comprises a volute and a motor arranged in the center of the volute and further comprises a vibration reduction mechanism, and the vibration reduction mechanism comprises a magnetic repulsion assembly and a plurality of telescopic connecting arms. The magnetic repulsion assembly comprises an inner magnetic ring and an outer magnetic ring which are mutually repulsive in magnetism, the inner magnetic ring is arranged on the periphery of the motor in a matched and sleeved mode, the outer magnetic ring comprises a plurality of magnetic sheets, the magnetic sheets are distributed outside the inner magnetic ring in the circumferential direction at intervals, a connecting arm is connected between each magnetic sheet and the volute, and the connecting arms are rotationally connected to the volute. According to the fan system, self-adaptive balance of vibration between the motor and the volute can be achieved, dynamic adjustment of vibration reduction is achieved according to actual requirements, and energy consumption of the system is reduced. The utility model further relates to a range hood which comprises a machine shell and the fan system, and the fan system is arranged in the machine shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fan system, and further relates to a range hood using the fan system. BACKGROUND

[0002] In modern kitchens, range hoods are important ventilation equipment, and their efficiency and quietness are important factors in product performance evaluation. The motor, as the core component of the range hood, directly affects the working efficiency and user experience of the whole machine. However, in actual use, the motor may encounter vibration problems caused by various factors, mainly including:

[0003] 1. Motor rotation radial and axial imbalance: Due to manufacturing tolerances or long-term wear, the motor's radial and axial center of gravity may deviate when rotating at high speed, which not only reduces the running stability of the motor, but also may accelerate the aging of the components.

[0004] 2. Blade imbalance: If the blades inside the range hood have uneven mass distribution, they will also generate unbalanced forces when rotating, causing additional vibration and noise.

[0005] 3. Improper installation: If the motor or the entire range hood is not installed according to specifications, such as an unstable support structure or an unsecured base, it may also cause additional vibration.

[0006] 4. Uneven gap between motor stator and rotor: If the gap between the stator and the rotor is not uniform, it may cause magnetic imbalance, affecting the electromagnetic performance of the motor and further causing vibration.

[0007] 5. Duct blockage: After long-term use, the duct of the range hood may be partially blocked due to oil accumulation, changing the aerodynamic characteristics and thus generating an additional vibration source.

[0008] To address the above problems, existing range hoods usually use passive damping measures such as spring shock absorbers and rubber vibration isolation pads, but under complex working conditions, especially when multiple vibration sources of the motor act simultaneously, these measures often fail to achieve the desired damping effect. Therefore, there is an urgent need for a more advanced and targeted damping technology to solve the vibration problems of the range hood motor under various operating conditions and improve the overall performance and user experience of the product. INVENTION CONTENTS

[0009] The first technical problem to be solved by the utility model is to provide a fan system that realizes adaptive balancing of vibration between the motor and the volute, dynamically adjusts damping according to actual needs, and reduces system energy consumption.

[0010] The second technical problem to be solved by the utility model is to provide an extractor hood using the fan system.

[0011] The utility model solves the above-mentioned first technical problem, and the technical scheme is as follows: a fan system, comprising a volute and a motor arranged at the center of the volute, characterized in that: further comprising a damping mechanism, the damping mechanism comprises a magnetic repulsion assembly and a plurality of telescopic connecting arms.

[0012] The magnetic repulsion assembly comprises an inner magnetic ring and an outer magnetic ring that repel each other magnetically, the inner magnetic ring is matched and arranged on the outer periphery of the motor, the outer magnetic ring comprises a plurality of magnetic sheets, the plurality of magnetic sheets are arranged on the outer side of the inner magnetic ring in a circumferential interval, one connecting arm is connected between each magnetic sheet and the volute, and the connecting arm is rotationally connected to the volute.

[0013] Preferably, a mounting rack is arranged on the volute, and the motor is fixed to the mounting rack.

[0014] The volute is provided with a connecting seat corresponding to each connecting arm, the connecting seat comprises a connecting shaft, and the end of the connecting arm is rotationally arranged on the connecting shaft.

[0015] In order to facilitate the installation of the magnetic repulsion assembly, the damping mechanism further comprises a cover shell arranged outside the motor, the magnetic repulsion assembly is arranged between the inner side wall of the cover shell and the outer peripheral wall of the motor, and the cover shell is provided with a gap through which the connecting arm passes.

[0016] In order to avoid the problem of additional vibration and noise caused by the outer magnetic ring touching the cover shell, an elastic layer is arranged between the outer magnetic ring and the inner side wall of the cover shell.

[0017] In order to better realize the swing of the outer magnetic ring and realize self-adaptive damping under the condition of reducing energy consumption, a guide groove is arranged on the outer wall surface of the magnetic sheet in the axial direction and inclined relative to the axial direction, and the first end of the connecting arm is rotationally limited in the guide groove.

[0018] Preferably, the guide surface of the guide groove is inclined from the rear to the front along the axial direction and gradually approaches the central axis of the volute.

[0019] In order to better realize the axial movement of the first end of the connecting arm, an axle is arranged at the first end of the connecting arm and matched with the width of the guide groove, and rollers are arranged at both ends of the axle.

[0020] The connecting arm comprises a first arm, a second arm and an elastic member that is telescopic and deformed in the axial direction, and the elastic member is connected between the first arm and the second arm.

[0021] The utility model discloses a technical scheme that the second technical problem is solved, which is characterized in that: a range hood comprises a casing, and is characterized in that: it further comprises a fan system as described above, and the fan system is arranged in the casing.

[0022] Compared with the prior art, the fan system in the utility model has the advantages that: the fan system in the utility model utilizes the structure of the magnetic repulsion assembly and the plurality of telescopic connecting arms, and the plurality of magnetic sheets between the inner magnetic ring and the outer magnetic ring can be self-adaptively adjusted in spacing in response to vibration problems caused by different factors, and in cooperation with the structure of the connecting arms, the magnetic sheets of the outer magnetic ring can also be inclined and swung at a required angle, so that, in response to nonlinear and multidimensional vibration conditions, self-adaptive vibration reduction is realized through repulsive force between the inner magnetic ring and the outer magnetic ring, that is, vibration reduction amplitude is automatically adjusted according to actual conditions and external conditions, and energy is saved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a perspective view of the fan system in the utility model embodiment.

[0024] Figure 2 It is a sectional view of Figure 1 .

[0025] Figure 3 It is a perspective view of the vibration reduction mechanism. DETAILED DESCRIPTION

[0026] The utility model will be further described in detail below in combination with the embodiment of the drawings.

[0027] As Figures 1 to 3 shown, the fan system in the embodiment comprises a volute 1, a motor 2 and a vibration reduction mechanism, the vibration reduction mechanism reduces vibration of the entire fan system during operation of the motor 2, generally, when the motor 2 operates, the vibration is multidimensional vibration in the axial and radial directions, and the vibration signal is linear.

[0028] The motor 2 is arranged at the center of the volute 1, and the motor 2 can be installed by using various existing installation structures, simply, a mounting rack 5 is arranged at the rear side of the volute 1, and the motor 2 is fixed on the mounting rack 5.

[0029] The vibration reduction mechanism comprises a cover 7, a magnetic repulsion assembly 3 and a plurality of telescopic connecting arms 4, the number of the connecting arms 4 is set according to actual needs and required vibration reduction effect, for example, the number can be set to three, four, five or six, etc., on the basis of ensuring the vibration reduction effect, the cost is effectively controlled, and four connecting arms 4 are arranged in the embodiment.

[0030] The magnetic repulsion assembly 3 comprises an inner magnetic ring 31 and an outer magnetic ring 32 that repel each other magnetically. The inner magnetic ring 31 is fitted around the outer periphery of the motor 2. In this embodiment, the inner magnetic ring 31 is tightly fitted around the motor 2, and can vibrate synchronously with the motor 2. The outer magnetic ring 32 comprises a plurality of magnetic sheets 321 that are evenly and spacedly arranged around the outer periphery of the inner magnetic ring 31. In order to facilitate the installation of the magnetic repulsion assembly 3, the damping mechanism further comprises a cover shell 7 that covers the motor 2. The magnetic repulsion assembly 3 is arranged between the inner side wall of the cover shell 7 and the outer periphery of the motor 2. The cover shell 7 is provided with a gap 71 through which the connecting arm 4 can pass. In order to avoid the outer magnetic ring 32 from touching the inner side wall of the cover shell 7 and causing additional vibration and noise, an elastic layer 8 is arranged between the outer magnetic ring 32 and the inner side wall of the cover shell 7.

[0031] In the case of vibration, the different distances between the magnetic sheets 321 and the inner magnetic ring 31 caused by the matching vibration adaptively adjust the repulsive force between the magnetic sheets 321 and the inner magnetic ring 31, so that the distances between the magnetic sheets 321 and the inner magnetic ring 31 tend to be uniform, thereby achieving the effect of damping. In this embodiment, the relative positional relationship between the inner magnetic ring 31 and the magnetic sheets 321 of the outer magnetic ring 32 is adaptively adjusted by the structure of the connecting arm 4. On this basis, the current of the inner magnetic ring 31 can also be adjusted to assist in the adjustment, so that the effect of adaptive damping is ultimately achieved.

[0032] Each magnetic sheet 321 is connected to the volute 1 by a connecting arm 4, and the connecting arm 4 is rotationally connected to the volute 1. Specifically, the volute 1 is provided with a connecting seat 6 corresponding to each connecting arm 4. The connecting seat 6 comprises a connecting shaft 61, and the end of the connecting arm 4 is rotationally fitted on the connecting shaft 61. The connecting arm 4 comprises a first arm rod 401, a second arm rod 402, and an elastic member 403 that is axially stretchable and deformable. The elastic member 403 is connected between the first arm rod 401 and the second arm rod 402, thereby realizing the stretchable and deformable characteristics of the connecting arm 4. Based on the structure that the connecting arm 4 is rotationally connected to the volute 1 and its stretchable and deformable characteristics, the posture of each magnetic sheet 321 of the outer magnetic ring 32 can be effectively adjusted, and the adaptive damping effect is achieved through the adaptive adjustment of the posture.

[0033] In order to better realize the swing of the outer magnetic ring 32, and realize adaptive damping in the case of reducing energy consumption, a guide groove 3211 inclined relative to the axial direction is arranged on the outer wall surface of the magnetic sheet 321 in the axial direction, and the first end of the connecting arm 4 is rolling limited in the guide groove 3211. In the embodiment, the guide surface of the guide groove 3211 is gradually inclined to the center axis of the volute 1 from the rear to the front in the axial direction. And in order to better realize the axial movement guide of the first end of the connecting arm 4, the first end of the connecting arm 4 is provided with a shaft 41 matched with the width of the guide groove 3211, and the both ends of the shaft 41 are provided with a roller 42. When the first end of the connecting arm 4 moves in the axial direction in the guide groove 3211, the distance between the inner magnetic ring 31 and the magnetic sheet 321 of the outer magnetic ring 32 in the axial direction will also change, so as to adjust the posture of the magnetic sheet 321 relative to the inner magnetic ring 31. Correspondingly, based on the change of the posture of the magnetic sheet 321, the repulsive force between the magnetic sheet 321 and the inner magnetic ring 31 also changes adaptively to the multi-dimensional and nonlinear vibration, thereby facilitating the realization of nonlinear adaptive damping in the axial and radial directions.

[0034] That is, based on the inclined structure of the ground of the guide groove 3211 on the magnetic sheet 321, when the first end of the connecting arm 4 rolls backward, that is, rolls in the direction of expanding outward relative to the center axis, the distance between the connecting arm 4 and the magnetic sheet 321 and the volute 1 becomes shorter, and the elastic member 403 will contract to form an elastic force. At the same time, based on the elastic force of the elastic member 403, a relative force is generated to make the magnetic sheet 321 of the outer magnetic ring 32 incline, and the distance between the outer magnetic ring 32 and the inner magnetic ring 31 is partially changed. Since different distances will produce different repulsive forces, in the process of the axial movement of the connecting arm 4, the effect of step-by-step damping is realized. When the axial movement of the connecting arm 4 cannot play a further damping effect, the current of the inner magnetic ring 31 is increased at this moment to realize the effect of increasing the repulsive force for damping.

[0035] The fan system utilizes the structure of the magnetic repulsion assembly 3 and the plurality of telescopic connecting arms 4, and the plurality of magnetic sheets 321 of the inner magnetic ring 31 and the outer magnetic ring 32 can realize adaptive adjustment of the distance between the plurality of magnetic sheets 321. In combination with the structure of the connecting arm 4, each magnetic sheet 321 of the outer magnetic ring 32 can also incline and swing by a required angle. Thus, for the nonlinear and multi-dimensional vibration condition, the repulsive force between the inner magnetic ring 31 and the outer magnetic ring 32 is utilized to realize adaptive damping, that is, the damping amplitude is automatically adjusted according to the actual situation and external conditions, and energy is saved.

[0036] The utility model also relates to a kind of range hood, including shell, and the fan system described above, fan system is arranged in shell. The range hood of the application of the above-mentioned fan system, damping effect is good, and will not cause additional vibration and noise.

[0037] In the description and claims of the present application, terms are used to generally identify the conceptual aspects of the embodiments. The use of these terms is intended to be illustrative and not restrictive. There can be many different examples of the application in which the terms could be used. Therefore, these terms are described in the detailed description of the application to allow embodiments of the application to be better understood. The terms used herein are not intended to limit the application, unless specifically so indicated.

Claims

1. A fan system comprising a volute (1) and a motor (2) arranged in the center of the volute (1), characterized in that: The damping mechanism comprises a magnetic repulsion assembly (3) and a plurality of telescopic connecting arms (4). The magnetic repulsion assembly (3) comprises an inner magnetic ring (31) and an outer magnetic ring (32) that repel each other magnetically, the inner magnetic ring (31) is matched and arranged on the outer periphery of the motor (2), the outer magnetic ring (32) comprises a plurality of magnetic sheets (321), the plurality of magnetic sheets (321) are arranged in a circumferential interval outside the inner magnetic ring (31), one connecting arm (4) is connected between each magnetic sheet (321) and the volute (1), and the connecting arm (4) is rotationally connected to the volute (1).

2. The fan system of claim 1, wherein: The volute (1) is provided with a mounting rack (5), and the motor (2) is fixed on the mounting rack (5).

3. The fan system of claim 1, wherein: The volute (1) is provided with a connecting seat (6) corresponding to each connecting arm (4), the connecting seat (6) comprises a connecting shaft (61), and the end of the connecting arm (4) is rotationally arranged on the connecting shaft (61).

4. The fan system of any one of claims 1 to 3, wherein: The damping mechanism further comprises a cover shell (7) covering the motor (2), the magnetic repulsion assembly (3) is arranged between the inner side wall of the cover shell (7) and the outer peripheral wall of the motor (2), and the cover shell (7) is provided with a gap (71) through which the connecting arm (4) passes.

5. The fan system of claim 4, wherein: An elastic layer (8) is arranged between the outer magnetic ring (32) and the inner side wall of the cover shell (7).

6. The fan system of any one of claims 1 to 3, wherein: An inclined guide groove (3211) is arranged on the outer wall surface of the magnetic sheet (321) in the axial direction, and the first end of the connecting arm (4) is rollingly limited in the guide groove (3211).

7. The fan system of claim 6, wherein: The guide surface of the guide groove (3211) gradually inclines towards the central axis of the volute (1) from back to front in the axial direction.

8. The fan system of claim 6, wherein: The first end of the connecting arm (4) is provided with a shaft rod (41) matching the width of the guide groove (3211), and the both ends of the shaft rod (41) are provided with rollers (42).

9. The fan system of any one of claims 1 to 3, wherein: The connecting arm (4) comprises a first arm rod (401), a second arm rod (402) and an elastic member (403) that is telescopic and deformed in the axial direction, and the elastic member (403) is connected between the first arm rod (401) and the second arm rod (402).

10. A range hood comprising a housing, characterized by: The fan system is arranged in a shell.

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