Centrifugal fan with double air outlets and household appliance

Abstract

The utility model relates to the technical field of centrifugal fans, and discloses a double-air-outlet centrifugal fan which comprises a front side plate, a rear side plate, a first air inlet, a second air inlet, a first air outlet and a second air outlet. The rear side plate is arranged opposite to the front side plate; the middle plate is arranged between the front side plate and the rear side plate and connected with the front side plate and the rear side plate, the front side plate, the middle plate and the rear side plate jointly form a volute, a first air outlet flow channel with a first air outlet is defined by the middle plate and the front side plate, a second air outlet flow channel with a second air outlet is defined by the middle plate and the rear side plate, and the middle plate is provided with a diffusion section; the diffusion section is arranged on the first air outlet flow channel and / or the second air outlet flow channel, and the distance between the side wall of the diffusion section and the front side plate or the distance between the side wall of the diffusion section and the rear side wall is gradually increased in the air flowing direction; the impeller is rotatably arranged in the volute and used for driving air to flow. According to the utility model, noise can be effectively reduced. The invention further discloses a household appliance.

Description

Technical Field

[0001] The present application relates to the technical field of centrifugal fans, and for example, to a dual-air outlet centrifugal fan and a household appliance. Background Art

[0002] At present, centrifugal fans generate centrifugal force through high-speed rotating impellers, which accelerates the gas and increases its pressure. The gas enters the volute from the collector inlet and is discharged from the volute outlet under the action of the impeller rotation. Traditional centrifugal fans have a single outlet, which does not meet the requirements of multi-directional air outlet.

[0003] A dual-outlet centrifugal fan is disclosed in the related technology, and the dual-outlet centrifugal fan includes: an upper cover, including an air inlet; a lower cover, which is combined with the upper cover to form a shell with an accommodating space, and forms a first air outlet and a second air outlet, the first air outlet and the second air outlet are connected to the air inlet through the accommodating space and are respectively located at the side edges of the shell, and are respectively in opposite directions, wherein the opening cross-sectional area of ​​the first air outlet is smaller than the opening cross-sectional area of ​​the second air outlet; and an impeller, which is accommodated in the accommodating space of the shell, spatially opposite to the air inlet, and rotates around a rotating shaft to introduce airflow from the air inlet and guide it to the first air outlet and the second air outlet, respectively.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The noise of the existing centrifugal fan with two air outlets will increase due to the superposition of multiple air outlets.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a dual-air outlet centrifugal fan and a household appliance to solve the problem that the noise of the existing dual-air outlet centrifugal fan increases due to the superposition of multiple air outlets.

[0009] An embodiment of the first aspect of the present application provides a dual-outlet centrifugal fan, the dual-outlet centrifugal fan comprising: a front side plate, provided with a first air inlet; a rear side plate, arranged opposite to the front side plate; a middle plate, arranged between the front side plate and the rear side plate, and connected to both the front side plate and the rear side plate, the front side plate, the middle plate and the rear side plate together constitute a volute, the middle plate and the front side plate enclose a first air outlet channel having a first air outlet, the middle plate and the rear side plate enclose a second air outlet channel having a second air outlet, the middle plate is provided with a diffuser section, the diffuser section is arranged in the first air outlet channel and / or the second air outlet channel, and along the air flow direction, the distance between the side wall of the diffuser section and the front side plate or the distance between the rear side wall and the front side plate gradually increases; an impeller, rotatably arranged in the volute, for driving air flow.

[0010] In some optional embodiments, the first air outlet duct has a first diffuser section, and the distance between the side wall of the first diffuser section and the front side panel gradually increases along the air flow direction, and the maximum distance between the side wall of the first diffuser section and the front side panel is less than or equal to the distance between the front side panel and the rear side panel; the second air outlet duct has a second diffuser section, and the distance between the side wall of the second diffuser section and the rear side panel gradually increases along the air flow direction, and the maximum distance between the side wall of the second diffuser section and the rear side panel is less than or equal to the distance between the front side panel and the rear side panel.

[0011] In some optional embodiments, the angle between the air outlet direction of the first air outlet and the air outlet direction of the second air outlet is 90 degrees to 180 degrees.

[0012] In some optional embodiments, the rear side plate is provided with a second air inlet, and the second air inlet is connected to the second air outlet channel.

[0013] In some optional embodiments, the middle plate is provided with a partition, which divides the internal space of the volute into a first air cavity and a second air cavity, the first air cavity is connected to the first air inlet, and the second air cavity is connected to the second air inlet.

[0014] In some optional embodiments, the impeller includes: a front disk; a rear disk, arranged side by side with the front disk; a plurality of blades, arranged between the front disk and the rear disk and distributed in a circular array, one end of each blade is connected to the front disk, and the other end is connected to the rear disk.

[0015] In some optional embodiments, the impeller further includes: a middle disk, which is disposed between the front disk and the rear disk and is connected to the plurality of blades to divide the impeller into a first part and a second part.

[0016] In some optional embodiments, the dual-outlet centrifugal fan further includes: a driving device, which is drivingly connected to the impeller; wherein a connecting port is defined in the middle of the center disk, the driving device is disposed at the connecting port and is drivingly connected to the center disk.

[0017] In some optional embodiments, the driving device includes: a driving motor, which is connected to the impeller driving device and is used to drive the impeller to rotate; a fixed bracket, one end of which is connected to the driving motor and the other end of which is connected to the front side plate or the rear side plate.

[0018] An embodiment of a second aspect of the present application provides a household appliance, the household appliance comprising a dual-air outlet centrifugal fan as described in any one of the above optional embodiments.

[0019] The dual-air outlet centrifugal fan and household appliance provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] By gradually increasing the distance between the diffuser section and the corresponding side plate along the air flow direction, not only can the noise caused by the sudden change of airflow be alleviated and the vortex noise be reduced, but also the vortex can be gradually moved away from the steady airflow, improving the stability of the airflow, thereby optimizing the noise performance of the double-outlet centrifugal fan and effectively reducing the noise of the double-outlet centrifugal fan. Secondly, this embodiment can increase the air outlet of the fan, reduce the wind speed at the air outlet, and thus reduce the noise. And the gradual expansion design of the diffuser section reduces the vortex and separation phenomenon caused by the sudden expansion of the airflow, reduces the resistance loss of the air outlet, and helps to maintain a stable exhaust pressure and a higher fan operating efficiency. In addition, this embodiment will not cause the overall external dimensions of the fan to change, that is, it achieves the optimization of noise without increasing the installation space.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of a double-air-outlet centrifugal fan provided by an embodiment of the present disclosure;

[0024] Figure 2 is a cross-sectional schematic diagram of a dual-air outlet centrifugal fan provided by an embodiment of the present disclosure;

[0025] Figure 3 is an exploded schematic diagram of a dual-air outlet centrifugal fan provided by an embodiment of the present disclosure;

[0026] Figure 4 It is a structural schematic diagram of another double-outlet centrifugal fan provided in an embodiment of the present disclosure.

[0027] Reference numerals:

[0028] 11: front side plate, 111: first air inlet, 12: rear side plate, 121: second air inlet, 13: middle plate, 131: expansion section, 132: partition plate, 14: first air outlet channel, 15: second air outlet channel,

[0029] 20: impeller, 21: front disc, 22: rear disc, 23: blades, 24: middle disc, 241: connection port,

[0030] 30: driving device, 31: driving motor, 32: fixing bracket, 321: supporting leg. DETAILED DESCRIPTION

[0031] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0032] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0034] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0035] Unless otherwise stated, the term "plurality" means two or more.

[0036] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0037] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0039] In a traditional centrifugal fan, the centrifugal fan mainly includes an impeller, a motor and a casing, and the casing is provided with an air inlet and an air outlet. Thus, when the motor is started, the impeller starts to rotate at high speed. The gas enters the center of the impeller from the air inlet, is pushed by the blades and accelerates toward the outer edge. Due to the centrifugal force, the gas velocity increases and the pressure increases. Subsequently, the pressurized gas is further increased in pressure by the expansion effect of the volute, and then discharged from the air outlet. In the process of the gas flowing out of the volute, the gas will form a vortex, resulting in a loss of air outlet performance and increased noise.

[0040] Combination Figures 1 to 4 As shown, the front and rear directions in the embodiment are as follows Figure 1 As shown in Figure 2The arrow in the figure indicates the direction of air flow. The embodiment of the present disclosure provides a dual-air outlet centrifugal fan, which includes a front side plate 11, a rear side plate 12, a middle plate 13 and an impeller 20. The front side plate 11 is provided with a first air inlet 111; the rear side plate 12 is arranged opposite to the front side plate 11; the middle plate 13 is arranged between the front side plate 11 and the rear side plate 12, and the middle plate 13 is connected to both the front side plate 11 and the rear side plate 12, and the front side plate 11, the middle plate 13 and the rear side plate 12 together form a volute The middle plate 13 and the front side plate 11 enclose a first air outlet channel 14 having a first air outlet, and the middle plate 13 and the rear side plate 12 enclose a second air outlet channel 15 having a second air outlet. The middle plate 13 is provided with a diffuser section 131, and the diffuser section 131 is arranged in the first air outlet channel 14 and / or the second air outlet channel 15. Along the air flow direction, the distance between the side wall of the diffuser section 131 and the front side plate 11 or the distance between the rear side wall gradually increases; the impeller 20 is rotatably arranged in the volute to drive the air flow.

[0041] By adopting the embodiment of the present disclosure, by enclosing the middle plate 13 and the front side plate 11 to form a first air outlet duct 14 having a first air outlet, and by enclosing the middle plate 13 and the rear side plate 12 to form a second air outlet duct 15 having a second air outlet, the centrifugal fan can be allowed to deliver gas in two directions at the same time, which increases flexibility and can meet the air supply requirements under different working conditions, such as when two-way ventilation is required. The diffuser section 131 is arranged in the first air outlet duct 14 and / or the second air outlet duct 15, that is, the number of diffuser sections 131 can be one or two. When the number of diffuser sections 131 is one, the diffuser section 131 is arranged corresponding to the front side plate 11 or the rear side plate 12, and when the number of diffuser sections 131 is two, the diffuser sections 131 are arranged corresponding to the front side plate 11 and the rear side plate 12, respectively.

[0042] By providing the impeller 20 and rotatably arranging the impeller 20 in the volute, the impeller 20 can drive the outside air to flow into the volute from the first air inlet 111 and flow out of the volute along the first air outlet channel 14 and the second air outlet channel 15 .

[0043] By gradually increasing the distance between the diffuser section 131 and the corresponding side plate along the air flow direction, not only can the noise caused by the sudden change of the airflow be alleviated and the vortex noise be reduced, but also the vortex can be gradually moved away from the steady airflow, and the airflow stability can be improved, thereby optimizing the noise performance of the double-outlet centrifugal fan and effectively reducing the noise of the double-outlet centrifugal fan. Secondly, this embodiment can increase the fan outlet, reduce the wind speed at the outlet, and thus reduce the noise. And the gradual expansion design of the diffuser section 131 reduces the vortex and separation phenomenon caused by the sudden expansion of the airflow, reduces the resistance loss of the air outlet, and helps to maintain a stable exhaust pressure and a higher fan operating efficiency. In addition, this embodiment will not cause the overall external dimensions of the fan to change, that is, it achieves the optimization of noise without increasing the installation space.

[0044] Optionally, the first air outlet duct 14 has a first diffuser section, and the distance between the side wall of the first diffuser section and the front side panel 11 gradually increases along the air flow direction, and the maximum distance between the side wall of the first diffuser section and the front side panel 11 is less than or equal to the distance between the front side panel 11 and the rear side panel 12; the second air outlet duct 15 has a second diffuser section, and the distance between the side wall of the second diffuser section and the rear side panel 12 gradually increases along the air flow direction, and the maximum distance between the side wall of the second diffuser section and the rear side panel 12 is less than or equal to the distance between the front side panel 11 and the rear side panel 12.

[0045] By adopting the embodiment of the present disclosure, by gradually increasing the distance between the side wall of the first diffuser section and the front side panel 11 along the air flow direction, and setting the maximum distance between the side wall of the first diffuser section and the front side panel 11 to be less than or equal to the distance between the front side panel 11 and the rear side panel 12, the space in the volute can be effectively utilized to fully diffuse the airflow without excessively increasing the overall size of the fan, thereby maintaining the compactness of the equipment. By gradually increasing the distance between the side wall of the second diffuser section and the rear side panel 12 along the air flow direction, and setting the maximum distance between the side wall of the second diffuser section and the rear side panel 12 to be less than or equal to the distance between the front side panel 11 and the rear side panel 12, the space in the volute can be effectively utilized to fully diffuse the airflow without excessively increasing the overall size of the fan, thereby maintaining the compactness of the equipment.

[0046] It should be noted that the diffuser section 131 includes a first diffuser section and a second diffuser section.

[0047] Optionally, an angle between an air outlet direction of the first air outlet and an air outlet direction of the second air outlet is 90 degrees to 180 degrees.

[0048] With the disclosed embodiment, the angle between the outlet direction of the first air outlet and the outlet direction of the second air outlet is 90 to 180 degrees, so that the setting directions of the first air outlet and the second air outlet can be adjusted according to actual needs, and when the outlet directions are at right angles or close to 180 degrees, effective coverage of the surrounding three-dimensional space can be achieved. In addition, the outlet directions that are perpendicular or in opposite directions can reduce the mutual interference of the airflow between the two air outlets, avoid short circuit or repeated circulation of the airflow, and improve the overall ventilation efficiency.

[0049] Optionally, the rear side plate 12 is provided with a second air inlet 121 , and the second air inlet 121 is communicated with the second air outlet channel 15 .

[0050] By adopting the embodiment of the present disclosure, by setting the second air inlet 121 on the rear side plate 12, air can be sucked in from two directions, significantly increasing the total amount of air entering the volute per unit time, thereby improving the overall ventilation efficiency. And by connecting the second air inlet 121 with the second air outlet duct 15, the impeller 20 can drive the outside air to flow into the volute from the first air inlet 111 and the second air inlet 121 respectively, which helps to make the airflow entering the volute more uniform and avoid the airflow turbulence and vortex that may occur when there is a single air inlet. This can not only reduce the collision and friction between airflows, but also effectively reduce the wind noise generated by uneven airflow.

[0051] Optionally, the middle plate 13 is provided with a partition 132 , and the partition 132 divides the internal space of the volute into a first air cavity and a second air cavity, the first air cavity is connected to the first air inlet 111 , and the second air cavity is connected to the second air inlet 121 .

[0052] By adopting the embodiment of the present disclosure, by setting the partition 132, the partition 132 can divide the internal space of the volute into a first wind chamber and a second wind chamber, and the first wind chamber is connected with the first air inlet 111, and the second wind chamber is connected with the second air inlet 121. The two wind chambers can be independent of each other, reducing the impact of the airflow from one wind chamber on the other air chamber, reducing mutual interference between airflows, improving the operating efficiency and stability of the fan, and helping to reduce the noise caused by airflow mixing, vortexes and collisions, so that the airflow in the two wind chambers is more orderly, thereby reducing the overall noise of the fan.

[0053] Optionally, the impeller 20 includes: a front disk 21, a rear disk 22 and a plurality of blades 23, the rear disk 22 and the front disk 21 are arranged side by side; the plurality of blades 23 are arranged between the front disk 21 and the rear disk 22 and are distributed in a circular array, one end of each blade 23 is connected to the front disk 21, and the other end is connected to the rear disk 22.

[0054] With the disclosed embodiment, a plurality of blades 23 are evenly arranged between the front disc 21 and the rear disc 22 and are distributed in a circumferential array, so that after the air or fluid enters the impeller 20, it can be evenly accelerated by the blades 23, effectively converting kinetic energy into pressure energy, thereby improving the efficiency of the centrifugal fan. The two ends of the blades 23 are respectively connected to the front disc 21 and the rear disc 22, which can form a stable mechanical structure, ensuring that the impeller 20 can maintain good stability during high-speed rotation, and reducing vibration and deformation caused by centrifugal force.

[0055] Optionally, both the front disk 21 and the rear disk 22 are provided with openings, the openings are circular, the flow area of ​​the opening of the front disk 21 is greater than or equal to the flow area of ​​the first air inlet 111, and the flow area of ​​the opening of the rear disk 22 is greater than or equal to the flow area of ​​the second air inlet 121.

[0056] In this way, by setting the flow area of ​​the opening of the front disc 21 to be greater than or equal to the flow area of ​​the first air inlet 111, it is ensured that the air entering from the first air inlet 111 can flow into the impeller 20 without obstacles, avoiding airflow obstruction and energy loss caused by too small an opening, thereby improving the air intake efficiency of the fan. In addition, a sufficiently large opening area can reduce the possibility of air forming a vortex or turbulence before entering the impeller 20, thereby reducing noise and energy loss. By setting the flow area of ​​the opening of the rear disc 22 to be greater than or equal to the flow area of ​​the second air inlet 121, it is ensured that the air entering from the second air inlet 121 can flow into the impeller 20 without obstacles, avoiding airflow obstruction and energy loss caused by too small an opening, thereby improving the air intake efficiency of the fan. In addition, a sufficiently large opening area can reduce the possibility of air forming a vortex or turbulence before entering the impeller 20, thereby reducing noise and energy loss.

[0057] Optionally, the impeller 20 further includes: a middle disc 24 disposed between the front disc 21 and the rear disc 22, and the middle disc 24 is connected to the plurality of blades 23 to divide the impeller 20 into a first part and a second part.

[0058] According to the embodiment of the present disclosure, by setting the middle disc 24 between the front disc 21 and the rear disc 22, and connecting the middle disc 24 with the plurality of blades 23, the middle disc 24 can effectively improve the structural strength and stability of the entire impeller 20, especially when running at high speed, it can effectively prevent the blades 23 from deforming and becoming unstable due to the centrifugal force. Secondly, the middle disc 24 divides the impeller 20 into two parts, which can not only evenly distribute the airflow load entering the impeller 20, avoid the unbalanced load caused by excessive airflow on one side, reduce vibration, but also reduce airflow turbulence and vortex, and reduce the noise generated thereby.

[0059] Optionally, the middle plate 24 is disposed at a position corresponding to the partition 132 .

[0060] In this way, the middle plate 24 cooperates with the partition 132 to help avoid mutual interference and mixing of the airflows in the two air cavities, maintain the independence of the airflows in each air cavity, further reduce the generation of airflow turbulence and vortex, and thus reduce noise and vibration. The middle plate 24 can better guide and organize the airflow, so that the airflow can be more evenly distributed on both sides of the impeller 20 after entering the blades 23, improve the utilization efficiency of the airflow, and then improve the total pressure rise and efficiency of the fan.

[0061] Optionally, the dual-outlet centrifugal fan further includes: a driving device 30, which is drivingly connected to the impeller 20; wherein a connecting port 241 is defined in the middle of the center disk 24, the driving device 30 is disposed at the connecting port 241 and is drivingly connected to the center disk 24.

[0062] According to the embodiment of the present disclosure, by drivingly connecting the driving device 30 with the impeller 20 and arranging the driving device 30 at the connection port 241 of the middle disk 24, the driving device 30 can not only drive the impeller 20 to rotate, but also provide stable support for the impeller 20, so that the impeller 20 can remain stable when rotating at high speed, avoiding shaking or displacement caused by centrifugal force. In addition, the driving device 30 is connected to the middle disk 24, which can effectively absorb and reduce the vibration generated by the transmission, reduce the transmission of mechanical vibration to other components, and thus reduce the noise level during operation.

[0063] Optionally, the opening area of ​​the connecting port 241 is less than or equal to one quarter of the flow area of ​​the first air inlet 111 .

[0064] In this way, the area of ​​the connection port 241 is much smaller than the flow area of ​​the first air inlet 111, which can minimize the obstruction of the drive device 30 to the airflow path, reduce the interference with the airflow inside the fan, and improve the aerodynamic performance. In addition, the smaller area of ​​the connection port 241 helps to reduce the vortex and turbulence caused by the drive device 30, and further suppress the noise during the operation of the fan. In addition, it is also helpful to keep the operating temperature of the drive device 30 within an appropriate range and reduce the risk of overheating.

[0065] Optionally, the driving device 30 includes: a driving motor 31 and a fixed bracket 32, the driving motor 31 is drivingly connected to the impeller 20, and is used to drive the impeller 20 to rotate; one end of the fixed bracket 32 ​​is connected to the driving motor 31, and the other end of the fixed bracket 32 ​​is connected to the front side plate 11 or the rear side plate 12.

[0066] According to the embodiment of the present disclosure, the drive motor 31 is connected and fixed to the front side plate 11 or the rear side plate 12 through the fixing bracket 32, so that the entire drive device 30 has a compact structure, is easy to install and position, and reduces the occupied space. In addition, the fixing bracket 32 ​​can play a certain shock-absorbing and buffering role, reduce the vibration generated by the drive motor 31 when running at high speed and transmitted to other components, reduce vibration noise, and improve the stability and comfort of equipment operation.

[0067] Optionally, the fixing bracket 32 ​​includes a plurality of legs 321 , one end of each leg 321 is connected to the driving motor 31 , and the other end of each leg 321 is connected to the front side plate 11 or the rear side plate 12 .

[0068] In this way, the multiple legs 321 disperse the weight of the drive motor 31 and the stress generated during operation. Compared with a single-point connection, the load can be more effectively and evenly transferred to the front side plate 11 or the rear side plate 12, significantly improving the overall stability of the entire drive device 30 and the centrifugal fan. The arrangement of the legs 321 can effectively reduce wind resistance and ensure air intake efficiency. In addition, even if a leg 321 fails or needs to be replaced, the remaining legs 321 can still maintain a stable connection between the drive motor 31 and the centrifugal fan, which is convenient for local repair or replacement.

[0069] Specifically, the number of the supporting legs 321 is three, and the three supporting legs 321 are evenly spaced apart in the radial direction.

[0070] In this way, the three legs 321 can form a stable triangular support structure, so that the drive motor 31 can maintain high stability in the radial direction, and can effectively resist centrifugal force and vibration even in high-speed operation, thereby improving the stability of the entire drive device 30. In addition, it is helpful to avoid the coupling of the natural frequency and the equipment operation frequency caused by the unreasonable number or distribution of the legs 321, reduce the probability of resonance, and effectively control the operation noise and vibration of the double-outlet centrifugal fan.

[0071] Optionally, the supporting leg 321 is detachably connected to the front side plate 11 or the rear side plate 12 .

[0072] In this way, the detachable connection design allows the support leg 321 to be quickly assembled and disassembled with the front side plate 11 or the rear side plate 12 during installation or maintenance. When a leg 321 or the front side plate 11 or the rear side plate 12 in the drive device 30 fails, only the corresponding part needs to be disassembled for replacement or repair, without the need to disassemble or replace the entire drive device 30 as a whole, thereby improving maintenance efficiency.

[0073] Specifically, the detachable connection method can be connected through screws and screw holes.

[0074] An embodiment of the present disclosure provides a household appliance, which includes a double-air outlet centrifugal fan as described in any one of the above optional embodiments.

[0075] The household appliance using the embodiments of the present disclosure includes the dual-air outlet centrifugal fan of any of the above embodiments, and therefore has the beneficial effects of the dual-air outlet centrifugal fan of any of the above embodiments, which will not be described in detail here.

[0076] Optionally, the household appliance may be a fresh air fan, an air conditioner, etc.

[0077] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A double-outlet centrifugal fan, characterized in that: include: The front side panel is provided with a first air inlet; A rear side plate, arranged opposite to the front side plate; A middle plate is disposed between the front side plate and the rear side plate, and is connected to both the front side plate and the rear side plate. The front side plate, the middle plate and the rear side plate together form a volute. The middle plate and the front side plate enclose a first air outlet channel having a first air outlet. The middle plate and the rear side plate enclose a second air outlet channel having a second air outlet. The middle plate is provided with a diffuser section, which is disposed in the first air outlet channel and / or the second air outlet channel. Along the air flow direction, the distance between the side wall of the diffuser section and the front side plate or the distance between the side wall and the rear side wall gradually increases. The impeller is rotatably disposed in the volute and is used to drive the air flow.

2. The dual-air outlet centrifugal fan according to claim 1, characterized in that: The first air outlet flow channel has a first diffuser section, the distance between the side wall of the first diffuser section and the front side plate gradually increases along the air flow direction, and the maximum distance between the side wall of the first diffuser section and the front side plate is less than or equal to the distance between the front side plate and the rear side plate; The second air outlet flow channel has a second diffuser section, and the distance between the side wall of the second diffuser section and the rear side plate is gradually increased along the air flow direction. The maximum distance between the side wall of the second diffuser section and the rear side plate is less than or equal to the distance between the front side plate and the rear side plate.

3. The dual-air outlet centrifugal fan according to claim 1, characterized in that: The included angle between the air outlet direction of the first air outlet and the air outlet direction of the second air outlet is 90 degrees to 180 degrees.

4. The dual-air outlet centrifugal fan according to claim 1, characterized in that: The rear side plate is provided with a second air inlet, and the second air inlet is communicated with the second air outlet channel.

5. The dual-air outlet centrifugal fan according to claim 4, characterized in that: The middle plate is provided with a partition, which divides the internal space of the volute into a first air cavity and a second air cavity. The first air cavity is communicated with the first air inlet, and the second air cavity is communicated with the second air inlet.

6. The dual-outlet centrifugal fan according to claim 1, characterized in that the impeller include: front plate; The rear disc is arranged side by side with the front disc; A plurality of blades are arranged between the front disk and the rear disk and are distributed in a circumferential array, one end of each blade is connected to the front disk, and the other end is connected to the rear disk.

7. The dual-air outlet centrifugal fan according to claim 6, characterized in that: The impeller also includes: The middle disc is arranged between the front disc and the rear disc and is connected to the plurality of blades to divide the impeller into a first part and a second part.

8. The dual-air outlet centrifugal fan according to claim 7, characterized in that: Also includes: A driving device, the driving device is connected to the impeller driving device; A connection port is defined in the middle of the middle disk, a driving device is arranged at the connection port and the driving device is connected to the middle disk in a driving manner.

9. The dual-air outlet centrifugal fan according to claim 8, characterized in that: The drive unit includes: A driving motor is connected to the impeller driving device and is used to drive the impeller to rotate; A fixed bracket has one end connected to the driving motor and the other end connected to the front side plate or the rear side plate.

10. A household appliance, characterized in that: It comprises a dual-outlet centrifugal fan as described in any one of claims 1 to 9.

Images