A centrifugal fan

Abstract

The utility model provides a centrifugal fan relates to fan technical field. Centrifugal fan includes bottom plate, fan body and casing, fan body includes motor, volute and impeller, casing sets up in bottom plate, casing cover sets up in fan body, casing is provided with air inlet and air outlet, the air outlet is linked together with the air outlet end of volute, be provided with a plurality of baffle in casing, a plurality of baffle surround motor setting, and the enclosed formation air inlet channel, one end of air inlet channel is linked together with air inlet, the other end of air inlet channel is linked together with the inner chamber of casing. External gas flows through the air inlet of casing, air inlet channel, the inner chamber of casing, the air inlet end of volute, the air outlet end of volute and the air outlet of casing in proper order, and when flowing through air inlet channel, the motor in air inlet channel is carried out high -efficient heat dissipation. Since the air volume of centrifugal fan is big, so the heat dissipation of motor can fully satisfy the heat dissipation demand of motor using the airflow of centrifugal fan self transmission, and the heat dissipation effect is better.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a centrifugal fan. Background Technology

[0002] When centrifugal fans are equipped with air bearings or magnetic levitation bearings, the impeller speed can be further increased, thereby increasing air pressure and air volume. Correspondingly, the motor in a centrifugal fan has higher power, generates more heat, and the heat dissipation problem becomes more severe. Under these circumstances, existing centrifugal fan cooling structures often cannot meet the motor's cooling requirements, resulting in poor heat dissipation performance. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the purpose of this utility model is to provide a centrifugal fan.

[0004] This utility model provides the following technical solution:

[0005] A centrifugal fan, comprising:

[0006] Base plate;

[0007] The fan body includes a motor, a volute, and an impeller. The motor is mounted on the base plate, the volute is connected to the end of the motor, and the impeller is disposed within the volute and connected to the motor shaft.

[0008] A housing is disposed on the base plate and covers the fan body. The housing has an air inlet and an air outlet. The air outlet is connected to the air outlet end of the volute. Multiple partitions are disposed inside the housing. The multiple partitions are arranged around the motor and form an air inlet channel. One end of the air inlet channel is connected to the air inlet, and the other end of the air inlet channel is connected to the inner cavity of the housing.

[0009] As a further alternative to the centrifugal fan, the plurality of partitions include two first partitions and two second partitions;

[0010] The first partition is arranged parallel to the axis of the motor, and the two first partitions are respectively located on both sides of the motor;

[0011] The second partition is arranged perpendicular to the axis of the motor, and the two second partitions are located at both ends of the motor, with the two sides of the second partition connected to the two first partitions respectively.

[0012] As a further alternative to the centrifugal fan, a filter screen is provided on the casing, and the filter screen covers the air inlet.

[0013] As a further optional embodiment of the centrifugal fan, the outer wall of the casing is provided with a groove, the groove extending through both sides of the casing, and the air inlet is located at the bottom of the groove.

[0014] As a further alternative to the centrifugal fan, a protective cover is provided on the casing, which covers the opening of the groove.

[0015] As a further optional solution for the centrifugal fan, two volutes are provided, each connected to one of the two ends of the motor, and the impeller is correspondingly arranged with respect to the volute.

[0016] As a further optional embodiment of the centrifugal fan, an outlet box is embedded in the casing, the outlet box having the air outlet and two air inlets, the two air inlets being respectively connected to the air outlet ends of the two volutes.

[0017] As a further optional solution for the centrifugal fan, the air outlet is located at the middle of the outlet box along the axis of the motor, and a first guide plate is provided inside the outlet box. The first guide plate is disposed opposite to the airflow inlet, and the axis of the first guide plate intersects the axis of the airflow inlet at an inclination.

[0018] As a further optional solution for the centrifugal fan, a second guide plate is provided inside the outlet box, the second guide plate is arranged opposite to the air outlet, and the two airflow inlets are respectively located on both sides of the second guide plate.

[0019] As a further optional solution for the centrifugal fan, a bracket is provided on the base plate, the motor is mounted on the bracket, and a shock-absorbing pad is provided between the motor and the bracket.

[0020] The embodiments of this utility model have the following beneficial effects:

[0021] In the centrifugal fan described above, multiple baffles surround the motor, forming an air inlet channel within which the motor is located. When the centrifugal fan is running, the motor drives the impeller to rotate at high speed relative to the volute, drawing in external gas through the air inlet of the casing. During this process, the external gas flows sequentially through the air inlet of the casing, the air inlet channel, the inner cavity of the casing, the air inlet end of the volute, the air outlet end of the volute, and the air outlet of the casing, effectively cooling the motor within the air inlet channel as it flows through it. Due to the large air volume of the centrifugal fan, utilizing the airflow itself to cool the motor effectively meets its cooling requirements, resulting in better heat dissipation.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This diagram shows an overall structural schematic of a centrifugal fan provided in an embodiment of the present invention;

[0025] Figure 2 It shows Figure 1 Schematic diagram of the cross section along the AA direction;

[0026] Figure 3 It shows Figure 1 Schematic diagram of the cross section along the BB direction;

[0027] Figure 4 It shows Figure 1 Schematic diagram of the cross section in the CC direction.

[0028] Explanation of key component symbols:

[0029] 100-Base plate; 110-Bracket; 120-Shock-absorbing pad; 200-Fan body; 210-Motor; 220-Voltage casing; 230-Impeller; 300-Casing; 310-Air inlet; 320-Baffle; 321-First baffle; 322-Second baffle; 330-Air inlet channel; 340-Filter screen; 350-Groove; 360-Protective cover; 370-Outlet box; 371-Air outlet; 372-Airflow inlet; 373-First guide plate; 374-Second guide plate. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Example

[0036] Please refer to the following: Figure 1 , Figure 2 and Figure 3 This embodiment provides a centrifugal fan, including a base plate 100, a fan body 200, and a casing 300.

[0037] The fan body 200 includes a motor 210, a volute 220, and an impeller 230. The motor 210 is mounted on the base plate 100, and the volute 220 is connected to the end of the motor 210. The impeller 230 is disposed inside the volute 220 and is connected to the shaft of the motor 210.

[0038] Furthermore, the housing 300 is mounted on the base plate 100 and covers the fan body 200. The housing 300 is provided with an air inlet 310 and an air outlet 371, with the air outlet 371 communicating with the air outlet end of the volute 220. Multiple partitions 320 are provided inside the housing 300, surrounding the motor 210 and forming an air inlet channel 330. One end of the air inlet channel 330 communicates with the air inlet 310, and the other end communicates with the inner cavity of the housing 300.

[0039] In the centrifugal fan described above, multiple baffles 320 are arranged around the motor 210, forming an air inlet channel 330, within which the motor 210 is located. When the centrifugal fan is running, the motor 210 drives the impeller 230 to rotate at high speed relative to the volute 220, drawing in external gas through the air inlet 310 of the casing 300. During this process, the external gas flows sequentially through the air inlet 310 of the casing 300, the air inlet channel 330, the inner cavity of the casing 300, the air inlet end of the volute 220, the air outlet end of the volute 220, and the air outlet 371 of the casing 300, effectively cooling the motor 210 within the air inlet channel 330 as it flows through it. Because the centrifugal fan has a large air volume, utilizing the airflow itself to cool the motor 210 can fully meet its cooling requirements, resulting in better heat dissipation.

[0040] For example, the base plate 100 is horizontally arranged. The motor 210 is arranged on the upper surface of the base plate 100, and the axis of the motor 210 is horizontal. The housing 300 covers the fan body 200 from top to bottom, and the air inlet 310 is arranged on the top surface of the housing 300, and the air outlet 371 is arranged at the bottom of the side wall of the housing 300.

[0041] In some embodiments, a filter 340 is provided on the housing 300, and the filter 340 covers the air inlet 310.

[0042] When in use, the filter 340 can filter the external air drawn into the air inlet 310, preventing large solid debris from being drawn into the air inlet 310, thereby avoiding blockage or wear of the volute 220.

[0043] In some embodiments, the outer wall of the housing 300 is provided with a groove 350. The groove 350 extends through both sides of the housing 300, and the air inlet 310 is disposed at the bottom of the groove 350.

[0044] For example, the groove 350 is provided on the top surface of the housing 300 and is located directly above the motor 210. The groove 350 extends horizontally through both sides of the housing 300, specifically through both sides of the housing 300 in a direction perpendicular to the axis of the motor 210.

[0045] When the centrifugal fan is running, the motor 210 drives the impeller 230 to rotate at high speed relative to the volute 220, creating a negative pressure at the air inlet 310 and drawing in gas from the groove 350. Simultaneously, external gas is continuously supplied to the groove 350 through its opening and both ends. Even if other objects are piled on top of the casing 300 or obstructed by other objects, external gas can still be continuously supplied to the groove 350 through its ends, ensuring the normal operation of the centrifugal fan.

[0046] Furthermore, a protective cover 360 is provided on the housing 300, which covers the groove of the recess 350.

[0047] When in use, the protective cover 360 can shield and protect the filter 340 and the air inlet 310, preventing foreign objects from impacting the filter 340 and causing it to deform or be damaged. At the same time, it prevents other objects from covering the bottom of the groove 350, thereby ensuring the unobstructed flow of the air inlet 310.

[0048] For example, the protective cover 360 has a mesh design that allows gas to pass through, and the mesh size of the protective cover 360 is much larger than the mesh size of the filter 340.

[0049] Please refer to the following: Figure 2 and Figure 3 In some embodiments, the plurality of partitions 320 include two first partitions 321 and two second partitions 322.

[0050] The first partition 321 is arranged parallel to the axis of the motor 210, and the two first partitions 321 are located on both sides of the motor 210.

[0051] The second partition 322 is arranged perpendicular to the axis of the motor 210. The two second partitions 322 are located at both ends of the motor 210, and the two sides of the second partition 322 are respectively connected to the two first partitions 321.

[0052] At this time, the first partition 321 and the second partition 322, which are arranged around the motor 210 and alternately connected, form a vertical air intake channel 330. The top of the air intake channel 330 is directly connected to the air inlet 310, and a certain distance is left between the bottom of the air intake channel 330 and the base plate 100 so that the gas flowing into the air intake channel 330 through the air inlet 310 can further flow into the inner cavity of the housing 300.

[0053] Specifically, the motor 210 has a flange at its end, which is fixedly connected to the volute 220. The shape of the second partition 322 located at both ends of the motor 210 is adapted to the flange, and the second partition 322 partially surrounds the upper part of the flange.

[0054] In some embodiments, a bracket 110 is provided on the base plate 100. A motor 210 is provided on the bracket 110, and a shock-absorbing pad 120 is provided between the motor 210 and the bracket 110.

[0055] Understandably, the radial dimension of the volute 220 is usually larger than that of the motor 210. The motor 210 is supported by the bracket 110, facilitating the assembly of the volute 220. Meanwhile, the vibration damping pad 120 positioned between the motor 210 and the bracket 110 effectively reduces vibrations generated by the motor 210 during operation, thereby reducing noise.

[0056] Please refer to the following: Figure 2 and Figure 4 In some embodiments, two volutes 220 are provided, and the two volutes 220 are respectively connected to the two ends of the motor 210. The impeller 230 is provided correspondingly to the volutes 220.

[0057] Correspondingly, the shaft of the motor 210 extends from both ends and connects to the two impellers 230 respectively, and simultaneously drives the two impellers 230 to rotate at high speed.

[0058] It should be noted that the blower body 200 adopts a dual-head design, using a motor 210 to simultaneously drive two impellers 230 to rotate. With the output power and speed of the motor 210 remaining constant, the torque on each of the two impellers 230 is half that of a single-head high-speed permanent magnet centrifugal blower, while the total torque remains constant. When the torque on the impeller 230 decreases, the outlet pressure of the volute 220 containing each individual impeller 230 also decreases accordingly, while the total outlet pressure remains unchanged. Simultaneously, since the speed of the motor 210 remains constant, the speeds of the two impellers 230 also remain constant, and both impellers 230 can achieve the same airflow as a single-head high-speed permanent magnet centrifugal blower, thus doubling the total airflow of the blower body 200 compared to a single-head high-speed permanent magnet centrifugal blower.

[0059] Therefore, by adopting a dual-head design, the fan body 200 increases the air volume while maintaining the same output power and air pressure. Conversely, the output power of the fan body 200 is reduced while maintaining the same ventilation effect, thus achieving energy saving.

[0060] Please refer to the following: Figure 3 and Figure 4 In some embodiments, an outlet box 370 is embedded in the housing 300. The outlet box 370 has an air outlet 371 and two air inlets 372, which are respectively connected to the air outlet ends of the two volutes 220.

[0061] When the centrifugal fan is running, the motor 210 drives the impeller 230 to rotate at high speed relative to the volute 220, discharging gas from the outlet end of the volute 220. The gas discharged from the outlet ends of the two volutes 220 enters the outlet box 370 through the airflow inlet 372, converges in the outlet box 370, and is then discharged from the outlet 371.

[0062] For example, the outlet box 370 is embedded in the bottom of the side wall of the housing 300.

[0063] Please see Figure 4 Furthermore, the air outlet 371 is located in the middle of the outlet box 370 along the axis of the motor 210. A first guide plate 373 is provided inside the outlet box 370. The first guide plate 373 is arranged opposite to the air inlet 372, and the axes of the first guide plate 373 and the air inlet 372 intersect at an incline.

[0064] Since the first guide plate 373 intersects the axis of the airflow inlet 372 at an inclination, the first guide plate 373 can change the flow direction of the gas entering the outlet box 370 through the airflow inlet 372, guide the gas to flow towards the air outlet 371, and make the gas discharge more smoothly from the air outlet 371.

[0065] Furthermore, a second guide plate 374 is provided inside the outlet box 370. The second guide plate 374 is arranged opposite to the air outlet 371, and two air inlets 372 are located on both sides of the second guide plate 374.

[0066] Understandably, when the gas enters the outlet box 370 through the airflow inlet 372 and flows toward the air outlet 371, the second guide plate 374 can separate and guide the two airflows, reduce the turbulence caused by the mutual impact of the two airflows, and also help the gas to be discharged more smoothly from the air outlet 371.

[0067] In summary, in the centrifugal fan described above, two first baffles 321 and two second baffles 322 are alternately arranged around the motor 210, forming an air inlet channel 330, within which the motor 210 is located. When the centrifugal fan is running, the motor 210 drives the impeller 230 to rotate at high speed relative to the volute 220, drawing in external gas through the air inlet 310 of the casing 300. During this process, the external gas flows sequentially through the air inlet 310 of the casing 300, the air inlet channel 330, the inner cavity of the casing 300, the air inlet end of the volute 220, the air outlet end of the volute 220, and the air outlet 371 of the casing 300, effectively cooling the motor 210 within the air inlet channel 330 as it flows through it. Because the centrifugal fan has a large air volume, utilizing the airflow itself to cool the motor 210 can fully meet its cooling requirements, resulting in better heat dissipation.

[0068] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0069] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0070] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A centrifugal fan, characterized in that, include: Base plate; The fan body includes a motor, a volute, and an impeller. The motor is mounted on the base plate, the volute is connected to the end of the motor, and the impeller is disposed inside the volute and connected to the motor shaft. as well as A housing is disposed on the base plate and covers the fan body. The housing has an air inlet and an air outlet. The air outlet is connected to the air outlet end of the volute. Multiple partitions are disposed inside the housing. The multiple partitions are arranged around the motor and form an air inlet channel. One end of the air inlet channel is connected to the air inlet, and the other end of the air inlet channel is connected to the inner cavity of the housing.

2. The centrifugal fan according to claim 1, characterized in that, The plurality of said partitions includes two first partitions and two second partitions; The first partition is arranged parallel to the axis of the motor, and the two first partitions are respectively located on both sides of the motor; The second partition is arranged perpendicular to the axis of the motor, and the two second partitions are located at both ends of the motor, with the two sides of the second partition connected to the two first partitions respectively.

3. The centrifugal fan according to claim 1, characterized in that, A filter screen is provided on the housing, and the filter screen covers the air inlet.

4. The centrifugal fan according to claim 3, characterized in that, The outer wall of the housing is provided with a groove, which runs through both sides of the housing, and the air inlet is located at the bottom of the groove.

5. The centrifugal fan according to claim 4, characterized in that, A protective cover is provided on the housing, and the protective cover covers the groove opening of the groove.

6. The centrifugal fan according to any one of claims 1-5, characterized in that, There are two volutes, which are respectively connected to the two ends of the motor, and the impeller is arranged correspondingly to the volutes.

7. The centrifugal fan according to claim 6, characterized in that, An outlet box is embedded in the housing. The outlet box has an air outlet and two air inlets. The two air inlets are respectively connected to the air outlets of the two volutes.

8. The centrifugal fan according to claim 7, characterized in that, The air outlet is located in the middle of the outlet box along the axis of the motor. A first guide plate is provided inside the outlet box. The first guide plate is disposed opposite to the airflow inlet, and the axis of the first guide plate intersects the axis of the airflow inlet at an inclination.

9. The centrifugal fan according to claim 8, characterized in that, The outlet box is provided with a second guide plate, which is arranged opposite to the air outlet, and the two airflow inlets are respectively located on both sides of the second guide plate.

10. The centrifugal fan according to any one of claims 1-5, characterized in that, A bracket is provided on the base plate, the motor is mounted on the bracket, and a shock-absorbing pad is provided between the motor and the bracket.

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