Noise reduction type combined range hood

Abstract

The utility model discloses a noise reduction type combined extractor hood, which relates to the technical field of extractor hood noise reduction and comprises a motor volute and fan blades arranged in the motor volute, a plurality of inner support rods are arranged on one side of the inner side of the motor volute close to the fan blades, and a partition plate is arranged on one side of the outer side of each inner support rod close to the inner wall of the motor volute. According to the utility model, the partition plates are arranged in the motor volute, so that four independent and parallel airflow ports are formed in the motor volute, airflow enters the motor volute and then enters the independent air duct formed by the partition plates, and the volume of each stream of airflow in the air duct is limited, so that large turbulent flow cannot be generated to collide with the motor volute to generate radiography; and meanwhile, the internal supporting strength of the motor volute is enhanced through the inner supporting rod and the partition plate in the motor volute, vibration caused by airflow is reduced, and noise generated by the motor volute part in the range hood is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction of range hoods, in particular to a noise-reducing combined range hood. Background Art

[0002] During operation, the range hood mainly absorbs oil smoke by rotating the fan blades installed in the motor volute under the action of the motor to generate suction. However, due to the material of the motor volute, it will produce a certain amount of noise when it is hit by the airflow. In addition, since the shape of the cavity inside the motor volute is larger on one side and smaller on the other side, the airflow speed in the larger area is slower, while the airflow speed on the smaller side is faster. The entanglement of the two airflows with different flow rates will cause gas turbulence.

[0003] The turbulent gas flow will repeatedly hit the inner wall of the motor volute as it flows outward along the motor volute, causing the motor volute to make noise and vibrate. This vibration will still cause noise. Utility Model Content

[0004] In order to make up for the deficiencies of the existing technical problems, the purpose of the present invention is to solve the problems existing in the existing technology: the airflows in the motor volute will collide with each other during the flow process to generate turbulence, and the turbulent gas will repeatedly collide with the motor volute during the movement to generate noise and cause the motor volute to vibrate and make noise again.

[0005] In order to solve the existing technical problems, the technical solution of the present invention is as follows: it includes a motor volute and a fan blade arranged inside the motor volute, a plurality of inner support rods are provided on the side of the inner side of the motor volute close to the fan blade, and a partition plate is provided on the side of the outer side of the inner support rods close to the inner wall of the motor volute.

[0006] Furthermore, the surface of the motor volute is provided with air inlet holes adapted to the fan blades, and the inner support rods are arranged in a circular array around the air inlet holes to ensure that the oil smoke can smoothly enter the interior of the motor volute.

[0007] Furthermore, both ends of the inner support rod are respectively welded to the motor volute, and the inner support rod is divided into an independent part and a combined part, wherein the combined part is welded to the partition plate, so that the inner support rod supports the motor volute inside the motor volute, reduces the occurrence of vibration, and connects the partition plate into a whole to enhance stability.

[0008] Furthermore, there are three partition plates in total, which are arranged parallel to each other inside the motor volute, and the three partition plates evenly divide the inside of the motor volute into four air ducts to differentiate the airflow.

[0009] Furthermore, the partition plate is hook-shaped as a whole, and the diameter of the hook-shaped curved part at the end is smaller than that of the two end parts. The thickness of the hook-shaped end part of the partition plate is smaller than the thickness of the end part, which uniformizes the flow rate of the airflow and reduces the vibration of the motor volute caused by the airflow.

[0010] Compared with the prior art, the advantages of the present invention are as follows:

[0011] The utility model forms four independent and parallel air flow openings inside the motor volute by arranging a partition plate inside the motor volute. After the airflow enters the motor volute, it first enters the independent air duct formed by the partition plate. The volume of each airflow in the air duct is limited and no large turbulence will collide with the motor volute to cause imaging. At the same time, the internal support rods and the partition plate in the motor volute strengthen the internal support strength of the motor volute, reduce the vibration caused by the airflow, and greatly reduce the noise generated by the motor volute part inside the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model.

[0014] Figure 3 This is a schematic diagram of a partition plate of the present invention.

[0015] Figure numerals: 1, motor volute; 2, fan blade; 3, inner support rod; 4, partition plate. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] like Figure 1-3As shown, a noise reduction type combined range hood comprises a motor volute 1 and a fan blade 2 arranged inside the motor volute 1, a plurality of inner support rods 3 are arranged on the inner side of the motor volute 1 near the fan blade 2, an air inlet hole adapted to the fan blade 2 is opened on the surface of the motor volute 1, the inner support rods 3 are arranged in a circular array along the air inlet hole to ensure that oil smoke can smoothly enter the motor volute 1, a partition plate 4 is provided on the outer side of the inner support rod 3 near the inner wall of the motor volute 1, the two ends of the inner support rod 3 are respectively welded to the motor volute 1, and the inner support rod 3 is divided into an independent part and a combined part, wherein the combined part is connected to the motor volute 1. The partition plate 4 is welded so that the inner support rod 3 supports the motor volute 1 inside the motor volute 1, slowing down the occurrence of vibration, and connecting the partition plates 4 as a whole to enhance stability. There are three partition plates 4 in total, and the three partition plates 4 are arranged parallel to each other inside the motor volute 1, and the three partition plates 4 divide the inside of the motor volute 1 into four air ducts evenly to differentiate the airflow. The partition plate 4 is hook-shaped as a whole, and the diameter of the hook-shaped curved part at the end is smaller than the two end parts. The thickness of the hook-shaped end part of the partition plate 4 is smaller than the thickness of the end part, which uniformizes the flow rate of the airflow and reduces the vibration of the motor volute 1 caused by the airflow.

[0018] Working principle description: Under the action of the fan blades 2, the oil smoke enters the motor volute 1 and enters the air duct area formed by the partition plate 4. At this time, the airflow is located at the end of the hook-shaped part of the partition plate 4. Here, the partition plate 4 is thicker than the hook-shaped curved part. Therefore, when the airflow moves toward the curved part, the diameter of the air duct gradually increases, and the flow rate of the airflow slows down, reducing the vibration caused by the rapid impact of the airflow on the motor volute 1. If vibration occurs, the inner support rod 3 in the motor volute 1 and the partition plate 4 are welded and fixed to the motor volute 1 to strengthen the overall structure of the motor volute 1, thereby reducing the effect of the vibration on the motor volute 1 to avoid loud noise. In the process of slowing down, the flow direction of the airflow is guided to ensure that no turbulence will be generated.

[0019] Then the airflow continues to move to the end part of the partition 4. During this process, the thickness of the partition plate 4 gradually increases, the diameter of the air duct decreases, the airflow speed increases and leaves the air duct area formed by the partition plate 4 and is discharged from the motor volute 1. The airflow leaving the air duct area flows in the same direction and will not produce turbulence caused by mutual collision after merging.

[0020] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise-reducing combined range hood, comprising a motor volute (1) and a fan blade (2) arranged inside the motor volute (1), characterized in that: A plurality of inner support rods (3) are provided on the inner side of the motor volute (1) close to the fan blades (2), and an irregular partition plate (4) is provided on the outer side of the inner support rods (3) close to the inner wall of the motor volute (1).

2. The noise-reducing combined range hood according to claim 1, characterized in that: An air inlet hole adapted to the fan blade (2) is provided on the surface of the motor volute (1), and the inner support rods (3) are arranged in a circular array around the air inlet hole.

3. The noise-reducing combined range hood according to claim 1, characterized in that: Both ends of the inner support rod (3) are respectively welded to the motor volute (1), and the inner support rod (3) is divided into an independent part and a combined part, wherein the combined part is welded to the partition plate (4).

4. The noise-reducing combined range hood according to claim 1, characterized in that: There are three partition plates (4) in total. The three partition plates (4) are arranged parallel to each other inside the motor volute (1), and the three partition plates (4) evenly divide the inside of the motor volute (1) into four air ducts.

5. The noise-reducing combined range hood according to claim 4, characterized in that: The partition plate (4) is hook-shaped as a whole, and the diameter of the hook-shaped curved portion at the end is smaller than that of the two end portions, and the thickness of the hook-shaped end portion of the partition plate (4) is smaller than the thickness of the end portion.

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