Air duct system with rectification and noise reduction structure

Abstract

The utility model relates to an air duct system with a rectification and noise reduction structure, and belongs to the field of kitchen appliances. The fan comprises a volute and an impeller, the impeller is mounted in the volute, and the fan is structurally characterized by further comprising a rectification and noise reduction structure, the rectification and noise reduction structure comprises rectification grids and an air guide ring, the rectification grids are welded with the air guide ring, the air guide ring is mounted at an air inlet of the volute, the rectification grids are positioned on the inner side of the impeller, and the rectification grids are welded with the air guide ring. The rectification grid comprises a plurality of grid rods, the grid rods are arranged in a circumferential array mode, grid holes are formed between the adjacent grid rods, one ends of the grid rods are welded to the air guide ring, the other ends of the grid rods are welded to the grid ring, reinforcing rings are welded to the middles of the grid rods, and the outer diameter of the rectification grid is smaller than the inner diameter of the impeller.

Description

Technical Field

[0001] This utility model relates to an air duct system with a rectification and noise reduction structure, belonging to the field of kitchen appliances. Background Technology

[0002] The main function of a range hood is to exhaust cooking fumes, odors, and steam generated during cooking outdoors, maintaining a clean and hygienic kitchen environment. When the range hood is working, a motor drives an impeller inside the casing to rotate, forming a flue within the casing. The rotation of the impeller draws the cooking fumes into the flue and exhausts them outdoors. However, because most range hoods on the market currently lack a rectification and noise reduction structure in the casing, the noise level is generally high when the motor drives the impeller, resulting in a poor user experience. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned deficiencies in the existing technology and to provide a duct system with a reasonable structural design and a rectification and noise reduction structure.

[0004] The technical solution adopted by this utility model to solve the above problems is: the air duct system with rectification and noise reduction structure includes a volute and an impeller, the impeller is installed inside the volute, and its structural feature is that it also includes a rectification and noise reduction structure, the rectification and noise reduction structure includes a rectification grid and a guide ring, the rectification grid is welded to the guide ring, the guide ring is installed at the air inlet of the volute, and the rectification grid is located on the inner side of the impeller.

[0005] Furthermore, the rectifying grid includes multiple grid rods arranged in a circular array, with grid holes formed between adjacent grid rods.

[0006] Furthermore, one end of the mesh rod is welded to the air guide ring, and the other end of the mesh rod is welded to the mesh ring.

[0007] Furthermore, a reinforcing ring is welded to the middle of the grid rod.

[0008] Furthermore, the outer diameter of the rectifier grid is smaller than the inner diameter of the impeller.

[0009] Compared with the prior art, the present invention has the following advantages: the duct system with rectification and noise reduction structure can play the role of rectification and noise reduction by setting the rectification and noise reduction structure on the volute. That is, the rectification mesh is welded on the air guide ring to form a rectification and noise reduction structure, which is then installed on the volute with screws. Installing the rectification mesh at the impeller inlet can reduce the boundary layer separation in the impeller passage, thereby reducing eddy noise. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of a duct system with a rectification and noise reduction structure according to an embodiment of the present invention.

[0011] Figure 2 This is an exploded structural diagram of a duct system with a rectification and noise reduction structure according to an embodiment of the present invention.

[0012] Figure 3 This is a three-dimensional structural diagram of the rectification and noise reduction structure according to an embodiment of the present utility model.

[0013] Figure 4 This is a three-dimensional structural diagram of the rectifier grid according to an embodiment of the present invention.

[0014] In the diagram: 1. Rectifying grid; 2. Air guide ring; 3. Rectifying and noise reduction structure; 4. Volute; 5. Impeller.

[0015] 11. Grid rod, 12. Grid ring, 13. Grid hole, 14. Reinforcing ring. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0017] Example

[0018] See Figures 1 to 4 As shown in the accompanying drawings, the structures, proportions, sizes, etc., depicted in this specification are merely for illustrative purposes to aid those skilled in the art and to provide a clear understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the use of terms such as "upper," "lower," "left," "right," "middle," and "one" in this specification is solely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0019] The air duct system with rectification and noise reduction structure in this embodiment includes a rectification and noise reduction structure 3, a volute 4, and an impeller 5. The impeller 5 is installed inside the volute 4. The rectification and noise reduction structure 3 includes a rectification mesh 1 and a guide ring 2. The rectification mesh 1 is welded to the guide ring 2. The guide ring 2 is installed at the air inlet of the volute 4. The rectification mesh 1 is located inside the impeller 5. The outer diameter of the rectification mesh 1 is smaller than the inner diameter of the impeller 5.

[0020] The rectifier grid 1 in this embodiment includes a plurality of grid rods 11 arranged in a circular array, with grid holes 13 formed between adjacent grid rods 11. One end of the grid rod 11 is welded to the air guide ring 2, and the other end of the grid rod 11 is welded to the grid ring 12. A reinforcing ring 14 is welded to the middle of the grid rod 11.

[0021] Specifically, the impeller 5 is driven by a motor to rotate inside the volute 4. The rectifier grid 1 is installed on the volute 4 through the guide ring 2, and the rectifier grid 1 is located inside the impeller 5. By adding the rectifier grid 1 at the inlet of the impeller 5, the boundary layer separation in the impeller passage can be reduced, thereby reducing eddy noise.

[0022] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A duct system with a rectification and noise reduction structure, comprising a volute (4) and an impeller (5), wherein the impeller (5) is installed inside the volute (4), characterized in that: It also includes a rectification and noise reduction structure (3), which includes a rectification grid (1) and a guide ring (2). The rectification grid (1) is welded to the guide ring (2), and the guide ring (2) is installed at the air inlet of the volute (4). The rectification grid (1) is located inside the impeller (5).

2. The duct system with rectification and noise reduction structure according to claim 1, characterized in that: The rectifier grid (1) includes multiple grid rods (11), which are arranged in a circular array, and grid holes (13) are formed between adjacent grid rods (11).

3. The duct system with rectification and noise reduction structure according to claim 2, characterized in that: One end of the grid rod (11) is welded to the air guide ring (2), and the other end of the grid rod (11) is welded to the grid ring (12).

4. The duct system with rectification and noise reduction structure according to claim 2, characterized in that: A reinforcing ring (14) is welded to the middle of the grid rod (11).

5. The duct system with rectification and noise reduction structure according to claim 1, characterized in that: The outer diameter of the rectifier grid (1) is smaller than the inner diameter of the impeller (5).

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