Air duct structure, centrifugal fan and integrated cooker

Abstract

The utility model provides an air duct structure, centrifugal fan and integrated stove, the air duct structure is used for being communicated with the volute air outlet of centrifugal fan, the air duct structure is provided with a first air outlet and a second air outlet which are arranged along a first direction and a second direction which are opposite to each other, the air duct structure also comprises: an air duct inlet which is arranged close to the first air outlet, the distance between the first side edge, facing the first air outlet, of the air duct inlet and the first air outlet is 100-150 mm. The first flow guide plate and the second flow guide plate are located on the first side and the second side of the air duct inlet respectively, the section of the first flow guide plate and the section of the second flow guide plate are each of an arc-shaped structure, and the first flow guide plate is higher than the second flow guide plate in the height direction of the air duct structure; the flow guide groove is formed in a bottom plate of the air duct structure, an oil leakage hole is formed in the flow guide groove, the flow guide groove extends in the direction away from the bottom plate, and the oil leakage hole is formed close to the first air outlet.

Description

Technical Field

[0001] The utility model particularly relates to an air duct structure, a centrifugal fan and an integrated stove. Background Art

[0002] Existing integrated stove left-right air outlet solutions mostly use a centrifugal fan + T-shaped duct model. Because the airflow from the centrifugal fan into the T-shaped duct has a strong impact in the direction perpendicular to the duct base, it causes high noise in the duct. Furthermore, the airflow velocity diverted through the base to the left and right air outlets is reduced, resulting in large flow losses and low outlet air speed. To address this issue, the duct inlet is usually tilted to reduce the impact on the duct base. However, this will cause most of the airflow entering the duct to flow from the tilted direction of the duct inlet to the corresponding outlet, while the airflow at the outlet away from the tilted direction of the duct inlet will be further reduced, resulting in uneven air volume distribution at the left and right outlets. This makes it impossible to simultaneously meet the performance indicators of equivalent air outlets on both sides. Furthermore, the outlets with higher flow rates will also experience higher noise. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of uneven air volume distribution and high noise at the two outlets of the air duct structure in the prior art, and to provide an air duct structure, a centrifugal fan and an integrated stove.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] An air duct structure is provided, the air duct structure being used to communicate with a volute air outlet of a centrifugal fan, the air duct structure having a first air outlet and a second air outlet arranged in opposite first and second directions, and the air duct structure further comprising:

[0006] an air duct inlet, the air duct inlet being arranged near the first air outlet, and a first side edge of the air duct inlet facing the first air outlet being spaced 100-150 mm from the first air outlet;

[0007] a first guide plate and a second guide plate, the first guide plate and the second guide plate being respectively located on a first side and a second side of the air duct inlet, the cross-sections of the first guide plate and the second guide plate both being arc-shaped, and the height of the first guide plate being higher than the height of the second guide plate along the height direction of the air duct structure;

[0008] A guide groove is provided on the bottom plate of the air duct structure, an oil leakage hole is provided in the guide groove, the guide groove extends in a direction away from the bottom plate, and the oil leakage hole is provided near the first air outlet.

[0009] In this solution, by offsetting the duct inlet, compared to a T-shaped duct, it diverts the airflow from the centrifugal fan into the duct structure while reducing the impact on the duct structure's baseplate. At the same time, the first guide plate, in conjunction with the offset duct inlet, can extend the airflow's travel within the duct, reducing the impact of the airflow on the baseplate, thereby reducing flow-induced noise and improving the user experience. Furthermore, the first and second guide plates are provided to effectively guide and divert the airflow entering the duct structure, allowing the airflow to flow evenly to the first and second outlets, achieving equivalent airflow from the first and second outlets.

[0010] Preferably, the distance between the oil leakage hole and the first air outlet is 180-280 mm.

[0011] In this solution, the above settings are used to reduce flow-induced noise and improve user experience.

[0012] Preferably, the arc length radius of the first guide plate is R1, and the value range of R1 is 80-100 mm.

[0013] In this solution, the above-mentioned arrangement is used to divert the airflow and smoothly guide it to the first air outlet.

[0014] Preferably, the arc length radius of the second guide plate is R2, and the value range of R2 is 190-200 mm. The first guide plate and the second guide plate are both arranged tangent to the edge of the air duct inlet.

[0015] In this solution, the above arrangement is used to divert the airflow and smoothly guide it to the second air outlet. In addition, the tangential arrangement allows for a smoother transition when directing the airflow, reducing the generation of eddies.

[0016] Preferably, a dimension of a connection between the second guide plate and the second side edge of the air duct inlet along the height direction of the air duct structure is 180-190 mm.

[0017] In this solution, the above arrangement is used to ensure that the air volume flowing to the second air outlet is consistent with the air volume flowing to the first air outlet.

[0018] Preferably, the cross-section of the guide groove along the height direction of the air duct structure is a V-shaped structure, and the oil leakage hole is provided at the end of the V-shaped structure away from the bottom plate of the air duct structure.

[0019] In this solution, the above arrangement not only enhances the overall strength of the bottom plate but also ensures that the oil and dirt flow to the oil leakage hole under the action of gravity.

[0020] Preferably, the guide groove extends away from the bottom plate by a distance of 5-8 mm.

[0021] In this solution, through the above-mentioned settings, the airflow is closely attached to the bottom plate of the duct structure according to the wall attachment effect, effectively reducing the cavity noise caused by the short airflow path. At the same time, the airflow wall attachment drainage effect can reduce eddy currents, making it smoother while ensuring the air outlet pressure and wind speed, thereby achieving the effect of uniform air supply.

[0022] Preferably, the diameter of the oil leakage hole is 3-6 mm.

[0023] In this solution, the above-mentioned setting is used to avoid whistling noise caused by the small aperture of the oil leakage hole, while reducing the air volume loss at the oil leakage hole and improving the aerodynamic performance of the air duct structure.

[0024] A centrifugal fan comprises the air duct structure described above.

[0025] In this solution, the centrifugal fan includes the above-mentioned air duct structure, which is connected to the volute air outlet of the centrifugal fan. Compared with the T-shaped air duct, the offset air duct inlet has a higher air flow diversion effect and lower noise, and better aerodynamic performance. The first air outlet and the second air outlet can achieve uniform equivalent air outlet, and the wind speed can meet the needs of users.

[0026] An integrated stove comprises the centrifugal fan as described above.

[0027] In this solution, the integrated stove includes the above-mentioned centrifugal fan to improve the air outlet efficiency.

[0028] The positive progress of the present invention lies in that, by offsetting the air duct inlet, the present invention diverts the airflow from the centrifugal fan into the air duct structure while reducing the impact on the bottom plate of the air duct structure, compared to a T-shaped air duct. At the same time, the first guide plate cooperates with the offset air duct inlet to extend the airflow's travel within the air duct, reducing the impact of the airflow on the bottom plate, thereby reducing flow-induced noise and improving the user experience. In addition, the first guide plate and the second guide plate are provided to effectively guide and divert the airflow entering the air duct structure, and also allow the airflow to flow evenly to the first air outlet and the second air outlet, achieving equivalent air output from the first air outlet and the second air outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a diagram showing the positional relationship between the centrifugal fan and the air duct structure of a preferred embodiment of the present invention.

[0030] Figure 2 This is a three-dimensional diagram of the air duct structure of a preferred embodiment of the present invention.

[0031] Figure 3 This is a front view of the air duct structure of a preferred embodiment of the present invention.

[0032] Figure 4 This is a top view of the air duct structure of a preferred embodiment of the present invention.

[0033] Figure 5 This is a bottom view of the air duct structure of a preferred embodiment of the present invention.

[0034] Description of reference numerals:

[0035] Air duct structure 10

[0036] Bottom plate 11

[0037] Air duct inlet 12

[0038] First side 121

[0039] Second side 122

[0040] First air outlet 111

[0041] Second air outlet 112

[0042] First guide plate 1

[0043] Second guide plate 2

[0044] Diversion trough 3

[0045] Oil leak hole 31

[0046] Volute 20 DETAILED DESCRIPTION

[0047] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0048] This embodiment provides an air duct structure 10, the specific structure of which is as follows Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the air duct structure 10 is used to communicate with the air outlet of the volute 20 of the centrifugal fan, and the air outlet of the volute 20 is tilted in the horizontal direction so that the airflow entering the air duct structure 10 is tilted with the bottom plate 11 of the air duct structure 10. Compared with the airflow entering in a direction perpendicular to the bottom plate 11, the impact force on the bottom plate 11 is correspondingly reduced. The tilted air outlet of the volute 20 belongs to the prior art and will not be described in detail here. The air duct structure 10 has a first air outlet 111 and a second air outlet 112 arranged in relative first and second directions. The air duct structure 10 also includes: an air duct inlet 12, the air duct inlet 12 is arranged close to the first air outlet 111, and the distance between the edge of the first side 121 of the air duct inlet 12 facing the first air outlet 111 and the first air outlet 111 is 100-150mm;

[0049] A first guide plate 1 and a second guide plate 2 are respectively located on a first side 121 and a second side 122 of the air duct inlet 12. The cross-sections of the first guide plate 1 and the second guide plate 2 are both arc-shaped structures. The height of the first guide plate 1 is higher than that of the second guide plate 2 along the height direction of the air duct structure 10.

[0050] The guide groove 3 is provided on the bottom plate 11 of the air duct structure 10 . An oil leakage hole 31 is provided in the guide groove 3 . The guide groove 3 extends away from the bottom plate 11 . The oil leakage hole 31 is provided near the first air outlet 111 .

[0051] Specifically, the air duct inlet 12 is tilted to correspond to the air outlet of the volute 10, a first guide plate 1 is provided on a first side 121 of the air duct inlet 12, a second guide plate 2 is provided on a second side 122 of the air duct inlet 12, the air duct inlet 12 is arranged close to the first air outlet 111, a guide groove 3 is provided on the bottom plate 11 of the air duct structure 10, and the guide groove 3 extends away from the bottom plate 11, that is, extends in a direction away from the air duct inlet 12, so that the airflow entering from the air duct inlet 12 further increases its stroke when flowing toward the bottom plate 11, and forms a primary airflow and a secondary airflow, so that the airflow Taking the flow toward the first air outlet 111 as an example, the primary airflow can flow directly out of the first air outlet 111 without contacting the bottom plate 11, i.e., without impacting the bottom plate 11, due to the inclined setting direction of the air duct inlet 12. The secondary airflow flows toward the bottom plate 11 and impacts the guide groove 3 provided on the bottom plate 11. At this time, compared with the bottom plate 11 being a flat plate arranged in the horizontal direction, the guide groove 3 extending away from the air duct inlet 12 further increases the flow path of the secondary airflow, thereby reducing the impact of the airflow on the bottom plate 11 and reducing flow-induced noise. At the same time, on the basis of forming the primary and secondary airflows, the primary airflow is guided by the first guide plate 1 to ensure the air volume flowing out of the first air outlet 111. The second guide plate 2 is similar and will not be described in detail here.

[0052] It can be understood that the height of the first guide plate 1 is higher than that of the second guide plate 2 based on the inclined setting direction of the air duct inlet 12, and the air flow is evenly divided to the first air outlet 111 and the second air outlet 112 in the air duct, realizing equivalent air outlet of the first air outlet 111 and the second air outlet 112, thereby achieving the effect of uniform air supply.

[0053] Preferably, the distance between the edge of the first side 121 of the air duct inlet 12 facing the first air outlet 111 and the first air outlet 111 is L2, and L2 is 120 mm. According to the analysis test using finite element software in the prior art, it is concluded that when the distance between the edge of the first side 121 and the first air outlet 111 is 120 mm, the aerodynamic performance of the air duct structure 10 is better. This embodiment does not improve the finite element software analysis test. This is the prior art and will not be elaborated on here.

[0054] In this embodiment, the distance between the oil leakage hole 31 and the first air outlet 111 is 180-280 mm.

[0055] Specifically, the oil leakage hole 31 is a circular hole that guides oil contaminants in the airflow out of the air duct structure 10 through the oil leakage hole 31, preventing the oil contaminants from accumulating in the guide groove 3 and affecting the aerodynamic performance of the air duct structure 10. The oil leakage hole 31 is spaced 180-280 mm from the first air outlet 111, so that the oil leakage hole 31 is spaced apart from the first side 121. This prevents the airflow, especially the secondary airflow, from being directly discharged from the air duct structure 10 through the oil leakage hole 31, thereby improving the user experience.

[0056] Preferably, the distance between the oil leakage hole 31 and the first air outlet 111 is L1, which is 250 mm. According to the analysis and test using finite element software in the prior art, the aerodynamic performance of the air duct structure 10 is better when the distance between the oil leakage hole 31 and the first air outlet 111 is 250 mm.

[0057] It should be noted that the air duct structure 10 also includes side panels, which are integrally formed with the bottom plate 11 to improve the sealing of the bottom plate 11, prevent oil from flowing out from the joints between the side panels and the bottom plate 11, and reduce the difficulty of cleaning the air duct structure 10.

[0058] In this embodiment, the arc length radius of the first deflector 1 is R1, and the value range of R1 is 80-100 mm. The two ends of the first deflector 1 are respectively connected to the first side 121 of the air duct inlet 12 and the edge of the first air outlet 111. The connection between the first deflector 1 and the first side 121 of the air duct inlet 12 is the distance between the edge of the first side 121 of the air duct inlet 12 and the first air outlet 111. The first deflector 1 disposed near the first air outlet 111 cooperates with the airflow from the air duct inlet 12 and guides the airflow. Compared with a structure in which the first side 121 of the air duct inlet 12 and the edge of the first air outlet 111 are disposed at a right angle, the first deflector 1 with an arc-shaped structure has a better airflow guiding effect, a smoother transition, and reduces the generation of vortices.

[0059] Preferably, R1 is 90 mm. According to analysis tests performed using finite element software in the prior art, it is found that the aerodynamic performance of the air duct structure 10 is better when R1 is 90 mm.

[0060] Furthermore, the arc length radius of the second guide plate 2 is R2, and the value range of R2 is 190-200 mm. The first guide plate 1 and the second guide plate 2 are both arranged tangent to the edge of the air duct inlet 12.

[0061] Specifically, the two ends of the second guide plate 2 are respectively connected to the second side 122 of the air duct inlet 12 and the edge of the second air outlet 112, so that the airflow from the air duct inlet 12 is coordinated with the second guide plate 2 and the airflow is guided. Compared with the structure in which the second side 122 of the air duct inlet 12 and the edge of the second air outlet 112 are arranged at right angles, the second guide plate 2 with an arc-shaped structure has a better effect on guiding the airflow, and the transition is smoother, thereby reducing the generation of vortices.

[0062] Furthermore, the first guide plate 1 and the second guide plate 2 are both arranged tangentially to the edge of the air duct inlet 12, making the connection between the first side 121 and the second side 122 and the first guide plate 1 and the second guide plate 2 smoother, thereby achieving a smoother transition when guiding the airflow and reducing the generation of vortices. It is understood that the tangential arrangement is a positional relationship between the edges of two structures in the prior art. This is a prior art and will not be further elaborated here.

[0063] Preferably, R2 is 195 mm. According to analysis tests performed using finite element software in the prior art, it is found that the aerodynamic performance of the air duct structure 10 is better when R2 is 195 mm.

[0064] In this embodiment, the dimension of the second guide plate 2 at the connection with the edge of the second side 122 of the air duct inlet 12 along the height direction of the air duct structure 10 is 180-190 mm. In other words, the dimension within the air duct structure 10 corresponding to the second guide plate 2 is 180-190 mm. In addition, the dimension of the second air outlet 112 along the height direction of the air duct structure 10 is H, which is 180 mm. This ensures that the dimensions of the second air outlet 112 of the air duct structure 10 are consistent and sufficient, thereby ensuring that the air volume flowing to the second air outlet 112 is consistent with the air volume flowing to the first air outlet 111.

[0065] Preferably, the dimension of the connection between the second guide plate 2 and the edge of the second side 122 of the duct inlet 12 along the height direction of the duct structure 10 is h, and h is 185 mm. According to the analysis test using finite element software in the prior art, it is concluded that when the dimension of the connection between the second guide plate 2 and the edge of the second side 122 of the duct inlet 12 along the height direction of the duct structure 10 is 185 mm, the air volume flowing to the second air outlet 112 and the air volume flowing to the first air outlet 111 are more uniform.

[0066] In this embodiment, the cross section of the guide groove 3 along the height direction of the air duct structure 10 is a V-shaped structure, and the oil leakage hole 31 is provided at the end of the V-shaped structure away from the bottom plate of the air duct structure 10 .

[0067] Specifically, the guide groove 3 is a V-shaped groove stamped into the bottom plate 11 away from the air duct inlet 12. The oil leakage hole 31 is located at the lowest point of the V-shaped groove, that is, at the end of the bottom plate away from the air duct structure 10. This ensures that oil and dirt flow from the inner wall of the guide groove 3 to the oil leakage hole 31 under the action of gravity. Furthermore, the V-shaped structure further increases the overall strength of the bottom plate 11 compared to flat plate materials.

[0068] It can be understood that the guide groove 3 is a V-shaped groove, which occupies less space and has a better effect of diverting oil and dirt compared to grooves of other structures, such as arc-shaped grooves or rectangular grooves.

[0069] In this embodiment, the guide groove 3 extends 5-8 mm away from the bottom plate 11. That is, the depth of the V-shaped structure is 5-8 mm. Due to the wall adhesion effect, the airflow flows closely to the bottom plate 11 of the air duct structure 10. Compared with a structure in which the bottom plate 11 is a flat plate, the airflow travels further within the air duct structure 10, effectively reducing the cavity noise caused by the short airflow travel. At the same time, the wall adhesion effect can reduce eddy currents, making the airflow smoother while ensuring the outlet pressure and wind speed, and achieving the effect of uniform air supply through the first air outlet 111 and the second air outlet 112.

[0070] In this embodiment, the diameter of the oil leakage hole 31 is 3-6 mm, which ensures the oil discharge effect while avoiding the whistling sound caused by the small diameter of the oil leakage hole 31, and reduces the air volume loss at the oil leakage hole 31, thereby improving the aerodynamic performance of the air duct structure 10.

[0071] This embodiment also provides a centrifugal fan, which includes the above-mentioned air duct structure 10, and the air duct structure 10 is connected to the air outlet of the volute 20 of the centrifugal fan. Compared with the T-shaped air duct, the offset air duct inlet 12 has a higher air flow diversion effect and lower noise, and better aerodynamic performance. The first air outlet 111 and the second air outlet 112 can achieve uniform equivalent air outlet, and the wind speed can meet the needs of users.

[0072] This embodiment also provides an integrated stove, which includes the above-mentioned centrifugal fan. The centrifugal fan is connected to the smoke duct of the integrated stove through the air duct structure 10, so as to evenly and equivalently discharge air through the first air outlet 111 and the second air outlet 112, thereby improving the air outlet efficiency and further improving the user experience of the integrated stove.

[0073] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. An air duct structure, the air duct structure being used to communicate with a volute air outlet of a centrifugal fan, the air duct structure having a first air outlet and a second air outlet arranged in opposite first and second directions, characterized in that: The air duct structure also includes: an air duct inlet, the air duct inlet being arranged near the first air outlet, and a first side edge of the air duct inlet facing the first air outlet being spaced 100-150 mm from the first air outlet; a first guide plate and a second guide plate, the first guide plate and the second guide plate being respectively located on a first side and a second side of the air duct inlet, the cross-sections of the first guide plate and the second guide plate both being arc-shaped, and the height of the first guide plate being higher than the height of the second guide plate along the height direction of the air duct structure; A guide groove is provided on the bottom plate of the air duct structure, an oil leakage hole is provided in the guide groove, the guide groove extends in a direction away from the bottom plate, and the oil leakage hole is provided near the first air outlet.

2. The air duct structure according to claim 1, characterized in that: The distance between the oil leakage hole and the first air outlet is 180-280 mm.

3. The air duct structure according to claim 1, wherein: The arc length radius of the first guide plate is R1, and the value range of R1 is 80-100 mm.

4. The air duct structure according to claim 3, characterized in that: The arc length radius of the second guide plate is R2, and the value range of R2 is 190-200 mm. The first guide plate and the second guide plate are both arranged tangent to the edge of the air duct inlet.

5. The air duct structure according to claim 4, characterized in that: The dimension of the connection between the second guide plate and the second side edge of the air duct inlet along the height direction of the air duct structure is 180-190 mm.

6. The air duct structure according to claim 1, wherein: The cross section of the guide groove along the height direction of the air duct structure is a V-shaped structure, and the oil leakage hole is arranged at the end of the V-shaped structure away from the bottom plate of the air duct structure.

7. The air duct structure according to claim 1, wherein: The guide groove extends away from the bottom plate by a distance of 5-8 mm.

8. The air duct structure according to claim 1, wherein: The diameter of the oil leakage hole is 3-6 mm.

9. A centrifugal fan, characterized in that: The centrifugal fan includes the air duct structure according to any one of claims 1 to 8.

10. An integrated stove, characterized in that: The integrated stove includes the centrifugal fan as claimed in claim 9.

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