Low-noise centrifugal fan

Abstract

The utility model discloses a low-noise centrifugal fan. The low-noise centrifugal fan comprises a volute, a damping assembly and a motor shell. A plurality of supporting seats are arranged on the upper end face of the volute, and first threaded holes are formed in the supporting seats. The damping assemblies are in one-to-one correspondence with the supporting seats, each damping assembly comprises a damping column and a bolt part, the lower end face of each damping column abuts against the corresponding supporting seat, each damping column is provided with a first through hole penetrating through the corresponding damping column in the vertical direction, and each bolt part penetrates through the corresponding first through hole and is in threaded connection with the corresponding first threaded hole; and an annular groove is formed in the peripheral wall of the damping column. The motor shell is provided with a plurality of mounting holes, the mounting holes correspond to the damping assemblies in a one-to-one mode, the damping columns are arranged in the mounting holes in a penetrating mode, and the hole walls of the mounting holes are inserted into the annular grooves so that the annular grooves can limit the motor shell to move in the vertical direction. When the motor shell vibrates, the damping columns can absorb the vibration, so that the vibration force transmitted to the volute is reduced, and the noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a low-noise centrifugal fan. Background Art

[0002] The outer shell of a centrifugal fan is assembled from a volute and a motor shell. At present, the volute and the motor shell are usually directly fixed together through a bracket, and the vibration generated by the motor is usually directly transmitted to the volute through the motor shell, resulting in a high noise during the operation of the centrifugal fan. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model provides a low-noise centrifugal fan.

[0004] The utility model provides a low-noise centrifugal fan, which includes:

[0005] A volute, wherein the upper end surface of the volute is provided with a plurality of support seats, and the support seats are provided with first threaded holes;

[0006] A shock absorbing assembly, wherein the plurality of shock absorbing assemblies correspond to the plurality of support seats one by one, the shock absorbing assembly comprises a shock absorbing column and a bolt member, the lower end surface of the shock absorbing column abuts against the support seat, the shock absorbing column is provided with a first through hole penetrating the shock absorbing column in the up-down direction, the bolt member is passed through the first through hole and is threadedly connected with the first threaded hole, and the outer peripheral wall of the shock absorbing column is provided with an annular groove;

[0007] The motor housing is provided with a plurality of mounting holes, the plurality of mounting holes correspond one-to-one to the plurality of shock absorbing assemblies, the shock absorbing column is passed through the mounting holes and the hole wall of the mounting hole is inserted into the annular groove so that the annular groove limits the movement of the motor housing in the up and down directions.

[0008] The low-noise centrifugal fan according to the embodiment of the utility model has at least the following technical effects: when the motor housing vibrates, the shock-absorbing column can absorb the vibration, so that the vibration force transmitted to the volute is reduced, thereby reducing the noise.

[0009] According to some embodiments of the utility model, an annular column is provided on the upper end surface of the support seat, the annular column is coaxially arranged with the first threaded hole, and the annular column is inserted into the first through hole to position the shock absorbing column.

[0010] According to some embodiments of the present invention, the diameter of the first through hole is larger than the diameter of the bolt member.

[0011] According to some embodiments of the utility model, the motor housing includes a barrel, a bottom cover and a connecting cover, the barrel opening faces downward, the bottom cover is located between the barrel and the connecting cover, the barrel, the bottom cover and the connecting cover are fixedly connected, and the connecting cover is provided with the mounting hole.

[0012] According to some embodiments of the utility model, the lower end of the barrel extends in a direction away from the barrel axis to form an annular portion, the annular portion is provided with a plurality of positioning holes, the bottom cover is provided with a plurality of positioning columns, the plurality of positioning holes correspond one-to-one to the plurality of positioning columns, and the positioning columns are inserted into the positioning holes.

[0013] According to some embodiments of the utility model, the annular portion is provided with a first connecting hole, the bottom cover is provided with a second connecting hole, and the connecting cover is provided with a third connecting hole, and rivets pass through the first connecting hole, the second connecting hole and the third connecting hole in sequence to rivet and fix the barrel, the bottom cover and the connecting cover.

[0014] According to some embodiments of the present invention, the outer side of the bottom cover extends upward to form a first stopper, a plurality of the first stoppers are circumferentially distributed around the axis of the bottom cover, and the plurality of the first stoppers cooperate together to limit the movement of the annular portion.

[0015] According to some embodiments of the utility model, a driving component is provided in the motor housing, and a driving shaft of the driving component is downwardly penetrated into the volute.

[0016] According to some embodiments of the utility model, a heat dissipation blade is fixedly connected to the driving shaft, and the heat dissipation blade is located between the connecting cover and the volute.

[0017] According to some embodiments of the utility model, the outer side of the connection cover extends downward to form a second stop portion, a plurality of the second stop portions are circumferentially distributed around the axis of the connection cover, and the lowest end of the second stop portion is lower than the lowest end of the heat dissipation blade.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic diagram of the structure of a low-noise centrifugal fan in some embodiments of the utility model;

[0021] Figure 2It is a partial structural exploded diagram of a low-noise centrifugal fan in some embodiments of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the volute of some embodiments of the utility model;

[0023] Figure 4 It is an exploded view of the motor housing of some embodiments of the utility model;

[0024] Figure 5 It is a cross-sectional view of a low-noise centrifugal fan according to some embodiments of the utility model.

[0025] Figure Number:

[0026] The volute 100, the support seat 110, the first threaded hole 111, and the annular column 112;

[0027] The shock absorbing assembly 200, the bolt member 210, the shock absorbing column 220, the first through hole 221, and the annular groove 222;

[0028] Motor housing 300, mounting hole 301, barrel 310, annular portion 311, positioning hole 312, first connecting hole 313, bottom cover 320, positioning column 321, second connecting hole 322, first stop portion 323, connecting cover 330, third connecting hole 331, rivet 340, driving component 350, driving shaft 351, heat dissipation blade 360, second stop portion 370. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0034] According to some embodiments of the present invention, referring to Figures 1 to 5 The low noise centrifugal fan includes a volute 100, a shock absorbing assembly 200 and a motor housing 300. The upper end surface of the volute 100 is provided with a plurality of support seats 110, and the support seat 110 is provided with a first threaded hole 111 extending in the up-down direction. The plurality of shock absorbing assemblies 200 correspond to the plurality of support seats 110 one by one, and the shock absorbing assembly 200 includes a shock absorbing column 220 and a bolt member 210, and the shock absorbing column 220 is made of plastic material. The lower end surface of the shock absorbing column 220 abuts against the support seat 110, and the shock absorbing column 220 is provided with a first through hole 221 that penetrates the shock absorbing column 220 in the up-down direction, and the first through hole 221 is coaxially arranged with the first threaded hole 111. The bolt member 210 is penetrated from top to bottom in the first through hole 221 and is threadedly connected with the first threaded hole 111. The outer peripheral wall of the shock absorbing column 220 is provided with an annular groove 222. The motor housing 300 is provided with a plurality of mounting holes 301, and the plurality of mounting holes 301 correspond one to one with the plurality of shock absorbing assemblies 200. The shock absorbing column 220 is penetrated through the mounting hole 301 and the hole wall of the mounting hole 301 is inserted into the annular groove 222, that is, the upper inner wall and the lower inner wall of the annular groove 222 cooperate with each other, so that the annular groove 222 limits the motor housing 300 to move in the up and down direction.

[0035] When the motor generates vibrations during internal operation, the motor housing 300 follows the vibrations, and the shock absorbing column 220 can absorb the vibrations, thereby reducing the vibration force transmitted to the volute 100 and reducing the noise.

[0036] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The upper end surface of the support seat 110 is provided with an annular column 112, which is coaxially arranged with the first threaded hole 111. The annular column 112 is inserted into the first through hole 221 to position the shock-absorbing column 220, so as to facilitate the mutual positioning of the shock-absorbing column 220 and the support seat 110 for easy assembly.

[0037] Preferably, the diameter of the first through hole 221 is larger than the diameter of the bolt member 210, that is, there is a certain gap between the bolt member 210 and the hole wall of the first through hole 221. When the shock-absorbing column 220 is vibrated to generate heat, or when the motor housing 300 transfers heat to the shock-absorbing column 220, the gap between the bolt member 210 and the hole wall of the first through hole 221 can accelerate the heat dissipation of the shock-absorbing column 220.

[0038] According to some embodiments of the present invention, referring to Figure 4 The motor housing 300 includes a barrel 310, a bottom cover 320 and a connecting cover 330. The barrel 310 opens downward, the bottom cover 320 is located between the barrel 310 and the connecting cover 330, the barrel 310, the bottom cover 320 and the connecting cover 330 are fixedly connected, and a mounting hole 301 is provided on the connecting cover 330.

[0039] Preferably, refer to Figure 4 The lower end of the barrel 310 extends in a direction away from the axis of the barrel 310 to form an annular portion 311, and the annular portion 311 is provided with a plurality of positioning holes 312. The bottom cover 320 is provided with a plurality of positioning posts 321. The plurality of positioning holes 312 correspond to the plurality of positioning posts 321 one by one. The positioning posts 321 are inserted into the positioning holes 312 to facilitate the positioning and assembly of the bottom cover 320 and the barrel 310.

[0040] Preferably, refer to Figure 4 The annular portion 311 is provided with a first connection hole 313, the bottom cover 320 is provided with a second connection hole 322, and the connection cover 330 is provided with a third connection hole 331. The rivet 340 passes through the first connection hole 313, the second connection hole 322 and the third connection hole 331 in sequence to rivet and fix the barrel 310, the bottom cover 320 and the connection cover 330. The rivet 340 can also be fixed by replacing the bolts and nuts.

[0041] Preferably, refer to Figure 4 The outer side of the bottom cover 320 extends upward to form a first stopper 323, and multiple first stoppers 323 are circumferentially distributed around the axis of the bottom cover 320. The multiple first stoppers 323 cooperate together to limit the movement of the annular portion 311 in the horizontal direction, so as to facilitate the positioning and assembly of the bottom cover 320 and the barrel 310.

[0042] According to some embodiments of the present invention, referring to Figure 5 A driving component 350 is provided in the motor housing 300, and a driving shaft 351 of the driving component 350 is downwardly penetrated into the volute 100. A heat dissipation fan blade 360 ​​is fixedly connected to the driving shaft 351, and the heat dissipation fan blade 360 ​​is located between the connection cover 330 and the volute 100. The driving shaft 351 can drive the heat dissipation fan blade 360 ​​to rotate, thereby improving the heat dissipation efficiency of the motor housing 300.

[0043] Preferably, refer to Figure 4 and Figure 5 The outer side of the connection cover 330 extends downward to form a second stopper 370. A plurality of second stoppers 370 are circumferentially distributed around the axis of the connection cover 330. The lowest end of the second stopper 370 is lower than the lowest end of the heat dissipation fan blade 360. When the shock-absorbing column 220 softens at high temperature, the highest end of the shock-absorbing column 220 becomes lower, so that the motor housing 300 moves downward, and the second stopper 370 can abut against the upper end surface of the volute 100, thereby preventing the heat dissipation fan blade 360 ​​from colliding with the volute 100 and causing damage.

[0044] In the description of this specification, the description with reference to the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low noise centrifugal fan, characterized in that: include: A volute (100), wherein the upper end surface of the volute (100) is provided with a plurality of support seats (110), and the support seats (110) are provided with first threaded holes (111); A shock absorbing assembly (200), wherein a plurality of the shock absorbing assemblies (200) correspond to a plurality of the support seats (110) one by one, the shock absorbing assembly (200) comprising a shock absorbing column (220) and a bolt member (210), the lower end surface of the shock absorbing column (220) abuts against the support seat (110), the shock absorbing column (220) is provided with a first through hole (221) penetrating the shock absorbing column (220) in the up-down direction, the bolt member (210) is penetrated through the first through hole (221) and is threadedly connected to the first threaded hole (111), and the outer peripheral wall of the shock absorbing column (220) is provided with an annular groove (222); A motor housing (300) is provided with a plurality of mounting holes (301), the plurality of mounting holes (301) corresponding one-to-one to the plurality of shock absorbing assemblies (200), the shock absorbing column (220) passing through the mounting hole (301) and inserting the hole wall of the mounting hole (301) into the annular groove (222) so that the annular groove (222) limits the movement of the motor housing (300) in the up and down directions.

2. The low noise centrifugal fan according to claim 1, characterized in that: An annular column (112) is provided on the upper end surface of the support seat (110), the annular column (112) is coaxially arranged with the first threaded hole (111), and the annular column (112) is inserted into the first through hole (221) to position the shock absorbing column (220).

3. The low noise centrifugal fan according to claim 1, characterized in that: The hole diameter of the first through hole (221) is greater than the diameter of the bolt member (210).

4. The low noise centrifugal fan according to claim 1, characterized in that: The motor housing (300) comprises a barrel (310), a bottom cover (320) and a connecting cover (330); the barrel (310) is opened downward; the bottom cover (320) is located between the barrel (310) and the connecting cover (330); the barrel (310), the bottom cover (320) and the connecting cover (330) are fixedly connected; and the connecting cover (330) is provided with the mounting hole (301).

5. The low noise centrifugal fan according to claim 4, characterized in that: The lower end of the barrel (310) extends in a direction away from the axis of the barrel (310) to form an annular portion (311), and the annular portion (311) is provided with a plurality of positioning holes (312). The bottom cover (320) is provided with a plurality of positioning posts (321), and the plurality of positioning holes (312) correspond one-to-one to the plurality of positioning posts (321), and the positioning posts (321) are inserted into the positioning holes (312).

6. The low noise centrifugal fan according to claim 5, characterized in that: The annular portion (311) is provided with a first connecting hole (313), the bottom cover (320) is provided with a second connecting hole (322), and the connecting cover (330) is provided with a third connecting hole (331). The rivet (340) passes through the first connecting hole (313), the second connecting hole (322) and the third connecting hole (331) in sequence so that the barrel (310), the bottom cover (320) and the connecting cover (330) are riveted and fixed.

7. The low noise centrifugal fan according to claim 5, characterized in that: The outer side of the bottom cover (320) extends upward to form a first stopper (323), and a plurality of the first stoppers (323) are circumferentially distributed around the axis of the bottom cover (320), and the plurality of the first stoppers (323) cooperate together to limit the movement of the annular portion (311).

8. The low noise centrifugal fan according to claim 4, characterized in that: A driving component (350) is disposed in the motor housing (300), and a driving shaft (351) of the driving component (350) is downwardly penetrated into the volute (100).

9. The low noise centrifugal fan according to claim 8, characterized in that: The driving shaft (351) is fixedly connected with a heat dissipation blade (360), and the heat dissipation blade (360) is located between the connection cover (330) and the volute (100).

10. The low noise centrifugal fan according to claim 9, characterized in that: The outer side of the connection cover (330) extends downward to form a second stopper (370), and a plurality of the second stoppers (370) are circumferentially distributed around the axis of the connection cover (330), and the lowest end of the second stopper (370) is lower than the lowest end of the heat dissipation blade (360).

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