Air inlet assembly and fan system thereof

Abstract

The utility model discloses an air inlet assembly which comprises an air guide ring, an air inlet pipe and an air outlet pipe. The noise reduction plate is connected to the back face of the air guide ring and located on the periphery of the air inlet part, an annular noise reduction cavity is formed between the noise reduction plate and the back face of the air guide ring, and a plurality of noise reduction holes communicated with the annular noise reduction cavity are formed in the noise reduction plate. The air inlet assembly is simple in structure and has the air guide and noise reduction functions. The utility model further discloses a fan system.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to an air inlet assembly and a fan system thereof, wherein the fan system is applied to a range hood or an integrated stove. Background Art

[0002] An integrated stove is a kitchen appliance that integrates multiple functions such as a range hood, a gas stove, a steam oven, a disinfection cabinet, etc., and has the advantages of saving space and good oil fume suction effect. With the continuous optimization of the kitchen space and the popularization of integrated stoves, how to improve the oil fume suction effect of integrated stoves and improve the fan performance has become the focus of research.

[0003] The existing air inlet devices of centrifugal fans of integrated stoves mostly have problems such as uneven air flow, high noise, and inconvenient maintenance. These disadvantages not only affect the use experience of kitchen appliances, but also reduce the operating efficiency of the whole machine. Summary of the Invention

[0004] The utility model aims to solve at least one of the problems existing in the related art to a certain extent. For this purpose, the utility model provides an air inlet assembly with a simple structure and air guiding and noise reduction functions. The utility model also provides a fan system.

[0005] According to the provided air inlet assembly, it is realized through the following technical solutions:

[0006] An air inlet assembly includes: a wind guiding ring provided with an air inlet part; and a noise reduction plate connected to the back of the wind guiding ring and located outside the air inlet part. An annular sound absorption cavity is formed between the noise reduction plate and the back of the wind guiding ring, and a plurality of noise reduction holes communicating with the annular sound absorption cavity are provided on the noise reduction plate.

[0007] In some embodiments, an annular groove located outside the air inlet part is recessed on the back of the wind guiding ring, and the noise reduction plate is arranged in the annular groove and jointly forms the annular sound absorption cavity.

[0008] In some embodiments, the opening of the annular groove faces backward and is arranged toward the radial outside of the wind guiding ring, and / or a buckling position is provided on the outer groove wall of the annular groove, and the buckling position is cooperatively connected with the radial outer end of the noise reduction plate.

[0009] In some embodiments, the air guide ring includes an inner ring, an outer ring, and a plurality of grid bars. The outer ring is disposed around the inner ring. The plurality of grid bars are circumferentially and evenly spaced between the inner ring and the outer ring. Opposite ends of each grid bar are respectively connected to the inner ring and the outer ring. A gap is formed between adjacent grid bars, and the air inlet portion is constituted by all the gaps. The noise reduction plate is connected to the back surface of the outer ring and jointly encloses the annular sound absorption cavity with the outer ring.

[0010] In some embodiments, a central through hole is provided at the center of the inner ring, and the diameter of the central through hole is 45 - 55 mm, and / or a plurality of fixing holes are circumferentially and spacedly arranged on the outer ring.

[0011] In some embodiments, the front surface of the inner ring protrudes from the front surface of the outer ring, and the back surface of the outer ring protrudes from the back surface of the inner ring.

[0012] In some embodiments, the grid bars are arranged obliquely from the inside to the outside and backward, and the angle between the grid bars and the horizontal plane is 55 - 65°.

[0013] In some embodiments, a partition portion is connected between adjacent grid bars, and the partition portion divides the gap into at least two parts.

[0014] In some embodiments, the diameter of the noise reduction holes is 2 - 4 mm, and / or a flow guiding surface is formed on the back surface of the noise reduction plate.

[0015] In some embodiments, it further includes a sound absorbing material, and the sound absorbing material is disposed in the annular sound absorption cavity.

[0016] According to the provided fan system, it is achieved through the following technical solutions:

[0017] A fan system includes: a fan assembly including a volute and an impeller. A front air inlet is provided on the front surface of the volute, and the impeller is rotatably disposed in the volute; and an air inlet assembly as described above. The air inlet assembly is disposed at the front air inlet and connected to the volute. The air inlet portion is communicated with the inside of the volute, and at least part of the noise reduction plate is disposed in the volute and located between the impeller and the air guide ring.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] The air inlet assembly of the present utility model forms an annular sound-absorbing cavity by arranging a noise reduction plate on the back of the air guiding ring with an air inlet part and enclosing them together. A plurality of noise reduction holes communicating with the annular sound-absorbing cavity are opened on the noise reduction plate. In this way, without affecting air intake, it can absorb the pneumatic noise generated by the operation of the fan assembly, so that the noise stays inside the fan assembly, providing a quieter kitchen environment for users and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the air inlet assembly in an embodiment of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the air inlet assembly from another angle in an embodiment of the present utility model;

[0022] Figure 3 is an exploded view of the air inlet assembly in an embodiment of the present utility model;

[0023] Figure 4 is a cross-sectional view of the air guiding ring in an embodiment of the present utility model;

[0024] Figure 5 is an exploded view of the fan system in an embodiment of the present utility model;

[0025] Figure 6 is a cross-sectional view of the fan system in an embodiment of the present utility model.

[0026] In the figure: 1 - air guiding ring, 11 - inner ring, 111 - central through hole, 12 - outer ring, 121 - annular groove, 122 - buckle position, 123 - fixing hole, 13 - grid bar, 131 - air inlet part, 14 - partition part; 2 - noise reduction plate, 21 - flow guiding surface, 22 - noise reduction hole; 3 - sound-absorbing material; 4 - fan assembly, 41 - volute, 42 - impeller, 43 - motor, 431 - motor shaft, 44 - nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following embodiments are used to illustrate the present utility model, but the present utility model is not limited by these embodiments. Modifying the specific implementation manner of the present utility model or making equivalent replacements for some technical features without departing from the spirit of the present utility model scheme shall all be covered within the scope of the technical solution claimed by the present utility model.

[0028] Embodiment 1

[0029] Reference Figures 1-6, this embodiment provides an air inlet assembly, which is used to be installed on the fan assembly of a range hood or an integrated range. The air inlet assembly includes a wind guide ring 1 and a noise reduction plate 2. The wind guide ring 1 is provided with an air inlet part 131 for air flow to pass through. The noise reduction plate 2 is connected to the back of the wind guide ring 1 and is located outside the air inlet part 131. The noise reduction plate 2 can be fixedly connected to the back of the wind guide ring 1 by means of bonding, riveting, screws, snap fasteners, etc. An annular sound absorption cavity (not shown in the figure) is formed between the noise reduction plate 2 and the back of the wind guide ring 1. A plurality of noise reduction holes 22 communicating with the annular sound absorption cavity are formed in the noise reduction plate. In this way, the air inlet assembly has the dual functions of guiding air and reducing noise. When the air inlet assembly is installed at the front air inlet of the fan assembly 4 (see Figure 6 ), without affecting air intake, the air inlet assembly can absorb the pneumatic noise generated by the operation of the fan assembly 4, so that the noise stays inside the fan assembly 4, providing a quieter kitchen environment for users and improving the overall performance and user experience of the integrated range.

[0030] Reference Figures 1-4 , an annular groove 121 located outside the air inlet part 131 is recessed on the back of the wind guide ring 1. The noise reduction plate 2 is arranged in the annular groove 121 and together forms an annular sound absorption cavity. In this embodiment, the opening of the annular groove 121 faces backward and radially outward of the wind guide ring 1, so that both the annular groove 121 and the noise reduction plate 2 installed in the annular groove 121 correspond to the impeller of the fan assembly 4, facilitating the noise reduction treatment of the air flow near the impeller by the noise reduction plate 2. A buckle 122 arranged in the circumferential direction is provided on the outer groove wall of the annular groove 121. The buckle 122 is cooperatively connected with the radially outer end of the noise reduction plate 2. Through the cooperation of the buckle 122 and the radially outer end of the noise reduction plate 2, it is effectively avoided that the connection between the wind guide ring 1 and the fan assembly 4 is interfered by the setting of the noise reduction plate 2.

[0031] Reference Figures 2-4 , the wind guide ring 1 includes an inner ring 11, an outer ring 12 and a plurality of grid bars 13. The outer ring 12 is arranged outside the inner ring 11. The plurality of grid bars 13 are circumferentially and evenly spaced between the inner ring 11 and the outer ring 12. The opposite ends of the grid bars 13 are respectively connected to the inner ring 11 and the outer ring 12. The gap between adjacent grid bars 13 forms the air inlet part 131. In this way, the wind guide ring 1 not only equalizes and distributes the air intake, enabling the air flow to smoothly and evenly enter the fan assembly, but also can filter the air flow to a certain extent, improving the grease separation effect. The noise reduction plate 2 is connected to the back of the outer ring 12 and together with the outer ring 12 encloses an annular sound absorption cavity.

[0032] In this embodiment, a central through hole 111 is provided at the center of the inner ring 11. The diameter D of the central through hole 111 is 45 - 55 mm. The central through hole 111 is used as a clearance hole or a disassembly and assembly hole to provide an installation space for the disassembly and assembly of the nut 44 in the fan assembly 4. A circular groove 121 located at the radial inner end of the back surface of the outer ring 12 and surrounding the air inlet portion 131 is recessed. A plurality of fixing holes 123 are circumferentially and spacedly arranged at the radial outer end of the outer ring 12, so as to facilitate connecting and fixing the air guide ring 1 to the fan assembly 4 through the plurality of fixing holes 123.

[0033] The front surface of the inner ring 11 protrudes from the front surface of the outer ring 12, and the back surface of the outer ring 12 protrudes from the back surface of the inner ring 11, so that the inner ring and the outer ring are arranged in a staggered manner. Further, it is convenient to design the grid bars 13 to be arranged obliquely backward from the radial inner side to the radial outer side. In this way, the grid bars 13 are evenly distributed obliquely between the inner and outer circles of the grille, which can effectively reduce the impact when the air flow enters the impeller of the fan assembly, reduce the flow loss at the inlet, and also achieve the effect of uniform air intake through the grid bars 13, effectively reducing the noise. In this embodiment, the angle θ between the grid bars 13 and the horizontal plane is 55 - 65°, so as to achieve the most ideal noise reduction effect and provide a quieter kitchen environment for users.

[0034] Further, a partition portion 14 is connected between adjacent grid bars 13. The partition portion 14 divides the gap into at least two parts, so as to play a role in dividing the air while strengthening the connection strength between adjacent grid bars 13. In this embodiment, the partition portion 14 includes a partition rib. The opposite ends of the partition rib are respectively connected to adjacent grid bars 13 to divide the gap into two inner and outer parts arranged at intervals in the radial direction. In other embodiments, the number of the partition portions 14 may include at least two partition ribs, and the at least two partition ribs are arranged at intervals in the radial direction.

[0035] Reference Figures 1-2 , all the noise reduction holes 22 are evenly distributed on the noise reduction plate 2, and the diameter of each noise reduction hole 22 is 2 - 4 mm. A guiding surface 21 is formed on the back surface of the noise reduction plate 2. The guiding surface 21 is in a streamline shape (see Figure 6 ) and is used to guide the air flow to reduce the eddy current and turbulent flow inside the volute 41.

[0036] See Figure 3 and Figure 6 , further, the air inlet assembly further includes a sound absorption material 3. The sound absorption material 3 is sound absorption cotton or other sound absorption materials, and is arranged in the annular sound absorption cavity, so as to further improve the noise reduction effect of the air inlet assembly.

[0037] Embodiment 2

[0038] Reference Figures 5-6, this embodiment provides a fan system, which is applied to a range hood or an integrated stove. The fan system includes a fan assembly 4 and an air inlet assembly as described in Embodiment 1. The fan assembly 4 includes a volute 41, an impeller 42 and a motor 43. A front air inlet is provided on the front of the volute 41, and a rear air inlet is provided on the back of the volute 41. At least part of the motor 43 is installed in the volute 41. The motor 43 has a motor shaft 431 extending toward the front air inlet. The impeller 42 is rotatably arranged in the volute 41 and connected to the motor shaft 431, so that the motor 43 can reliably drive the impeller 42 to rotate.

[0039] The air inlet assembly is arranged at the front air inlet and connected to the volute 41. The air inlet part 131 is communicated with the inside of the volute 41. At least part of the noise reduction plate 2 extends into the volute 41 through the front air inlet and is located between the impeller 42 and the air guide ring 1, so that the noise reduction plate 2 is arranged corresponding to the impeller 42, ensuring that the air inlet assembly can absorb the airflow noise near the impeller 42, so that the noise stays inside the volute 41 of the fan assembly 4, providing a quieter kitchen environment for users and improving the user experience.

[0040] Reference Figures 5-6 , further, the fan assembly 4 further includes a nut 44. The motor shaft 431 horizontally penetrates through the center of the impeller 42, and the free end of the motor shaft 431 extends into the central through hole 111 of the air guide ring 1. The nut 44 is rotatably arranged at the central through hole of the air guide ring 1 and is cooperatively connected to the free end of the motor shaft 431.

[0041] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the creative concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An air inlet assembly, characterized in that: include: An air guide ring (1), wherein the air guide ring (1) is provided with an air inlet portion (131); as well as A noise reduction plate (2), the noise reduction plate (2) being connected to the back of the air guide ring (1) and being located at the periphery of the air inlet portion (131), an annular silencer cavity being formed between the noise reduction plate (2) and the back of the air guide ring (1), and a plurality of noise reduction holes (22) being connected to the annular silencer cavity being provided on the noise reduction plate.

2. An air inlet assembly according to claim 1, characterized in that: An annular groove (121) is concavely provided on the back side of the air guide ring (1) and is located at the periphery of the air inlet portion (131); the noise reduction plate (2) is arranged in the annular groove (121) and together they form the annular silencer cavity.

3. An air inlet assembly according to claim 2, characterized in that: The opening of the annular groove (121) is arranged to face backward and toward the radial outer side of the air guide ring (1), and / or a buckle position (122) is provided on the outer groove wall of the annular groove (121), and the buckle position (122) is matched and connected with the radial outer end of the noise reduction plate (2).

4. The air inlet assembly according to claim 1, characterized in that: The air guide ring (1) comprises an inner ring (11), an outer ring (12) and a plurality of grid bars (13); the outer ring (12) is arranged on the periphery of the inner ring (11); the plurality of grid bars (13) are evenly spaced circumferentially arranged between the inner ring (11) and the outer ring (12); opposite ends of the grid bars (13) are respectively connected to the inner ring (11) and the outer ring (12); gaps are formed between adjacent grid bars (13); the air inlet portion (131) is formed by all the gaps; the noise reduction plate (2) is connected to the back side of the outer ring (12) and together with the outer ring (12) encloses the annular silencer cavity.

5. An air inlet assembly according to claim 4, characterized in that: A central through hole (111) is provided at the center of the inner ring (11), the diameter of the central through hole (111) is 45-55 mm, and / or a plurality of fixing holes (123) are provided on the outer ring (12) at intervals in the circumferential direction.

6. The air inlet assembly according to claim 4, characterized in that: The front side of the inner ring (11) protrudes from the front side of the outer ring (12), and the back side of the outer ring (12) protrudes from the back side of the inner ring (11).

7. The air inlet assembly according to claim 4, characterized in that: The grid bars (13) are arranged from the inside to the outside and tilted backwards, and the angle between the grid bars (13) and the horizontal plane is 55-65 degrees.

8. The air inlet assembly according to claim 4, characterized in that: A partition (14) is connected between adjacent grid bars (13), and the partition (14) divides the gap into at least two parts.

9. The air inlet assembly according to claim 1, characterized in that: The diameter of the noise reduction hole (22) is 2 to 4 mm, and / or a flow guide surface (21) is formed on the back side of the noise reduction plate (2).

10. An air inlet assembly according to any one of claims 1 to 9, characterized in that: It also comprises a sound absorbing material (3), wherein the sound absorbing material (3) is arranged in the annular sound-absorbing cavity.

11. A fan system, characterized in that: include: A fan assembly (4) comprises a volute (41) and an impeller (42), wherein a front air inlet is provided on the front side of the volute (41), and the impeller (42) is rotatably disposed in the volute (41); as well as An air inlet assembly as claimed in any one of claims 1 to 10, wherein the air inlet assembly is arranged at the front air inlet and is connected to the volute (41), the air inlet portion (131) is communicated with the interior of the volute (41), and at least a portion of the noise reduction plate (2) is arranged in the volute (41) and is located between the impeller (42) and the air guide ring (1).

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