Range hood with noise reduction function, noise reduction system and noise reduction method

Abstract

The invention relates to a range hood with a noise reduction function, a noise reduction system and a noise reduction method, and belongs to the field of kitchen appliances. The range hood comprises a range hood main body and a smoke suction fan, the smoke suction fan is arranged in the range hood main body, the range hood main body comprises a fan volute, an air outlet, a wind wheel and a check valve plate, the air outlet is connected with the fan volute, the wind wheel is arranged in the fan volute, and the check valve plate is arranged in the air outlet. The fan volute is structurally characterized by further comprising a splitter used for dividing an airflow track into two paths to prevent noise caused by extrusion of airflow at a volute tongue of the fan volute, the splitter is arranged in the air outlet and divides the air outlet into a first flue and a second flue, the splitter is located below the check valve plate, and the first flue and the second flue are arranged in the check valve plate. The splitter is of a V-shaped structure.

Description

Technical Field

[0001] The invention relates to a range hood with noise reduction function, a noise reduction system and a noise reduction method, and belongs to the field of kitchen appliances. Background Art

[0002] The range hood is used to exhaust smoke generated during cooking in the kitchen, and comprises a range hood body 1 and a smoke exhaust fan 2. The smoke exhaust fan 2 is arranged in the range hood body 1. The range hood body 1 comprises a fan volute 21, an air outlet 22, a wind wheel 23 and a check valve plate 24. The existing smoke exhaust fan 2 (such as Figure 1 As shown in FIG. 1 ), since no flow divider 25 is provided, the high-speed airflow will be squeezed in the volute tongue area of ​​the fan volute 21, causing airflow volute noise and air volume loss; the existing noise reduction system (such as Figure 2 As shown in the figure, since no noise reduction volute 3 is provided, the air outlet 22 is often connected to the air outlet smoke pipe 4 at a right angle. Therefore, the high-speed airflow will be squeezed in the 90-degree right-angle area where the air outlet 22 is connected to the air outlet smoke pipe 4, causing airflow volute noise and pressure loss, and the pressure loss reaches 80-100Pa.

[0003] In view of this, a volute structure, a fan and a range hood are disclosed in the patent document with application number 202122703503.3. The end of the guide plate 1 in the above-mentioned prior art away from the air outlet 4 is tangent to the outer edge of the air inlet 3, and the guide plate 1 and the diverter plate 25 in this application are set in different positions. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a range hood with a reasonable structural design and a noise reduction function, as well as a noise reduction system and a noise reduction method.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is: the range hood with noise reduction function comprises a range hood main body and a smoke exhaust fan, the smoke exhaust fan is arranged in the range hood main body, the range hood main body comprises a fan volute, an air outlet, a wind wheel and a check valve plate, the air outlet is connected to the fan volute, the wind wheel is arranged in the fan volute, and the check valve plate is arranged in the air outlet. Its structural feature is that it also includes a diverter plate for dividing the airflow trajectory into two paths to prevent the airflow from being squeezed at the volute tongue of the fan volute and generating noise, the diverter plate is arranged in the air outlet, and the diverter plate divides the air outlet into a first flue and a second flue, and the diverter plate is located below the check valve plate.

[0006] Furthermore, the diverter piece is arranged in a V-shaped structure.

[0007] Furthermore, the diverter plate is arranged in the middle of the air outlet.

[0008] Furthermore, a baffle is provided on the fan volute, and the baffle is parallel to the diverter plate.

[0009] Furthermore, the first flue and the second flue are each matched with a check valve plate.

[0010] Furthermore, another technical purpose of the present invention is to provide a noise reduction system.

[0011] The above technical objectives of the present invention are achieved through the following technical solutions.

[0012] A noise reduction system has the structural characteristics of comprising a range hood and a noise reduction volute, wherein the noise reduction volute is provided with a noise reduction volute inlet and a noise reduction volute outlet, the noise reduction volute inlet is connected to an air outlet, and the noise reduction volute outlet is connected to an air outlet smoke pipe.

[0013] Furthermore, the noise reduction volute is provided with rounded corners.

[0014] Furthermore, another technical purpose of the present invention is to provide a noise reduction method for a noise reduction system.

[0015] The above technical objectives of the present invention are achieved through the following technical solutions.

[0016] A noise reduction method for a noise reduction system, characterized in that: the noise reduction method is as follows: smoke enters into a fan volute and flows in the fan volute, and when the smoke enters into an air outlet, a diverter is provided in the air outlet to separate the air outlet into a first flue and a second flue, so that the smoke can flow in two paths, so as to reduce the aerodynamic noise and eddy noise generated by the high-speed airflow squeezing the volute tongue and volute wall of the fan volute, and also reduce the flow and pressure loss; the air outlet is connected with the noise reduction volute, and the noise reduction volute can be used for airflow conversion, that is, the high-speed airflow enters the smooth noise reduction volute through the noise reduction volute inlet with rounded corners, decelerates and rectifies the airflow so that the airflow flows smoothly to the noise reduction volute outlet, so as to reduce the airflow pressure loss and flow loss, thereby improving the smoke exhaust performance of the range hood.

[0017] Compared with the prior art, the present invention has the following advantages: by arranging a diverter plate in the air outlet, the aerodynamic noise and eddy noise generated by the squeezing of the volute tongue and the volute wall by the high-speed airflow can be reduced, and the flow and pressure losses can also be reduced. In addition, arranging the diverter plate in a V-shaped structure can reduce the resistance to the smoke.

[0018] The air outlet and the air smoke pipe are connected through a noise reduction volute, and the noise reduction volute can be used for airflow conversion. When the high-speed airflow passes through the noise reduction volute inlet with rounded corners and then enters the smooth noise reduction volute, it is decelerated and rectified so that the airflow flows smoothly to the noise reduction volute outlet. This can reduce the airflow pressure loss and flow loss when the traditional right-angle turn connection between the air smoke pipe and the air outlet is adopted, thereby improving the smoke exhaust performance of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of a smoking fan in the prior art.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of a range hood in the prior art.

[0021] Figure 3 It is a schematic cross-sectional structure diagram of a smoking fan according to an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the smoking fan according to an embodiment of the present invention.

[0023] Figure 5 Schematic diagram of the cross-sectional structure of the noise reduction system according to an embodiment of the present invention.

[0024] Figure 6 1 is a schematic diagram of a top view of the noise reduction system according to an embodiment of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the noise reduction system according to an embodiment of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the noise reduction volute according to an embodiment of the present invention.

[0027] Fig. 9 It is a schematic diagram of the main structure of the noise reduction volute according to an embodiment of the present invention.

[0028] Fig.10 1 is a left-side structural schematic diagram of a noise reduction volute according to an embodiment of the present invention.

[0029] In the figure: range hood body 1, smoke exhaust fan 2, noise reduction volute 3, air outlet pipe 4, The fan volute 21, the air outlet 22, the wind wheel 23, the check valve plate 24, the diverter plate 25, the enclosure 26, the first flue 27, the second flue 28, Noise reduction volute inlet 31 and noise reduction volute outlet 32. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0031] Example

[0032] See also Figures 3 to 10 As shown, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, if there are references to terms such as "upper", "lower", "left", "right", "middle" and "one" in this specification, they are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0033] The range hood with noise reduction function in this embodiment includes a range hood body 1 and a smoke exhaust fan 2. The smoke exhaust fan 2 is arranged in the range hood body 1. The range hood body 1 includes a fan volute 21, an air outlet 22, a wind wheel 23 and a check valve plate 24, as well as a diverter plate 25 for dividing the airflow trajectory into two paths to prevent the airflow from being squeezed at the volute tongue of the fan volute 21 and generating noise. The air outlet 22 is made of plastic or metal.

[0034] The air outlet 22 in this embodiment is connected to the fan volute 21, the wind wheel 23 is arranged in the fan volute 21, the check valve plate 24 is arranged in the air outlet 22, the diverter plate 25 is arranged in the air outlet 22, and the diverter plate 25 divides the air outlet 22 into a first flue 27 and a second flue 28, and the diverter plate 25 is located below the check valve plate 24.

[0035] The diverter plate 25 in this embodiment is arranged in a V-shaped structure. The diverter plate 25 is arranged in the middle of the air outlet 22. A surrounding plate 26 is arranged on the fan volute 21. The surrounding plate 26 is parallel to the right side of the diverter plate 25. The first flue 27 and the second flue 28 are each matched with a check valve plate 24, that is, when smoking, the smoke in the two flues can push open the check valve plates 24 respectively.

[0036] The noise reduction system in this embodiment includes a range hood and a noise reduction volute 3. The noise reduction volute 3 is provided with a noise reduction volute inlet 31 and a noise reduction volute outlet 32. The noise reduction volute inlet 31 is connected to the air outlet 22, and the noise reduction volute outlet 32 ​​is connected to the air outlet smoke pipe 4. Rounded corners are provided inside the noise reduction volute 3.

[0037] The noise reduction method of the noise reduction system in this embodiment is as follows: the smoke enters the fan volute 21 and flows in the fan volute 21. When the smoke enters the air outlet 22, a diverter 25 is provided in the air outlet 22 to separate the air outlet 22 into a first flue 27 and a second flue 28, so that the smoke can flow in two paths, so as to reduce the aerodynamic noise and eddy noise generated by the high-speed airflow squeezing the volute tongue and the volute wall of the fan volute 21, and also reduce the flow and pressure loss; the air outlet 22 is connected with the noise reduction volute 3, and the noise reduction volute 3 can be used for airflow conversion, that is, the high-speed airflow enters the smooth noise reduction volute 3 through the noise reduction volute inlet 31 with rounded corners, decelerates and rectifies the airflow so that the airflow flows smoothly to the noise reduction volute outlet 32, so as to reduce the airflow pressure loss and flow loss, thereby improving the smoke exhaust performance of the range hood.

[0038] Specifically, the range hood with noise reduction function is as follows Figure 3 As shown, a diverter plate 25 with a V-shaped structure is installed in the middle position inside the air outlet 22, which can divide the high-speed airflow into two flows. After separation, the airflow whirlpool noise and air volume loss are greatly reduced, the circulation environment is improved, and the airflow congestion is significantly cleared; the diverter plate 25 is connected to the air outlet 22, and the specific position is between the check valve plate 24.

[0039] The noise reduction system Figure 6 As shown, a noise reduction volute 3 is installed in the 90-degree connection area between the air outlet 22 and the air outlet smoke pipe 4 for air flow conversion. The high-speed airflow passes through the noise reduction volute inlet 31 provided with a transition fillet and then enters the smooth noise reduction volute 3 to slow down and rectify the airflow so that it flows smoothly to the noise reduction volute outlet 32, so as to reduce air flow extrusion and volute noise, and the noise can be reduced by 2-3dB; installing the noise reduction volute 3 for air flow conversion can reduce the air flow pressure loss to 5-10Pa, greatly improving the smoke exhaust effect of the range hood.

[0040] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A range hood with a noise reduction function, comprising a range hood body (1) and a smoke exhaust fan (2), the smoke exhaust fan (2) being arranged in the range hood body (1), the range hood body (1) comprising a fan volute (21), an air outlet (22), a fan wheel (23) and a check valve (24), the air outlet (22) being connected to the fan volute (21), the fan wheel (23) being arranged in the fan volute (21), and the check valve (24) being arranged in the air outlet (22), characterized in that: It also includes a flow divider (25) for dividing the airflow trajectory into two paths to prevent the airflow from being squeezed at the volute tongue of the fan volute (21) and generating noise. The flow divider (25) is arranged in the air outlet (22), and the flow divider (25) divides the air outlet (22) into a first flue (27) and a second flue (28). The flow divider (25) is located below the check valve plate (24). The flow divider (25) is arranged in a V-shaped structure. The flow divider (25) is arranged in the middle of the air outlet (22).

2. The range hood with noise reduction function according to claim 1, characterized in that: The fan volute (21) is provided with a baffle (26), and the baffle (26) is parallel to the diverter plate (25).

3. The range hood with noise reduction function according to claim 1, characterized in that: The first flue (27) and the second flue (28) are each matched with a check valve plate (24).

4. A noise reduction system, characterized in that: The range hood comprises a range hood as claimed in any one of claims 1 to 3, and a noise reduction volute (3), wherein the noise reduction volute (3) is provided with a noise reduction volute inlet (31) and a noise reduction volute outlet (32), wherein the noise reduction volute inlet (31) is connected to an air outlet (22), and the noise reduction volute outlet (32) is connected to an air outlet pipe (4).

5. The noise reduction system according to claim 4, characterized in that: The noise reduction volute (3) is provided with rounded corners.

6. A noise reduction method according to the noise reduction system of claims 4-5, characterized in that: The noise reduction method is as follows: smoke enters a fan volute (21) and flows in the fan volute (21); when the smoke enters an air outlet (22), a flow divider (25) is provided in the air outlet (22) to separate the air outlet (22) into a first flue (27) and a second flue (28), so that the smoke can flow in two paths, thereby reducing aerodynamic noise and eddy noise generated by the high-speed airflow squeezing the volute tongue and volute wall of the fan volute (21), and also reducing flow and pressure loss; the air outlet (22) is connected to the noise reduction volute (3), and the noise reduction volute (3) can be used for airflow conversion, that is, the high-speed airflow enters the smooth noise reduction volute (3) through the noise reduction volute inlet (31) with rounded corners, decelerates, and rectifies the airflow so that the airflow flows smoothly to the noise reduction volute outlet (32), thereby reducing airflow pressure loss and flow loss, thereby improving the smoke exhaust performance of the range hood.

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