Range hood

Abstract

The present invention discloses a range hood, characterized in that it comprises: a range hood body and a muffler, wherein the range hood body has an air outlet, the muffler is arranged at the air outlet, and the muffler comprises a plurality of muffler sections connected in sequence, and at least two of the muffler sections have different cross-sectional areas. Thus, through the cooperation of the range hood body and the muffler, some noises of a certain frequency can be weakened, the exhaust noise of the range hood can be effectively reduced, the exhaust noise of the range hood can be improved, thereby reducing the sound power of the whole machine, and further improving user satisfaction.

Description

Technical Field

[0001] The invention relates to the technical field of noise reduction, and in particular to a range hood. Background Art

[0002] The range hood is a noisy product. The main sources of noise are fan noise, intake noise and exhaust noise. Improving the exhaust noise of the range hood is an important way to improve noise.

[0003] In the related art, the air outlet of the existing range hood is generally connected to a smoke duct, and the exhaust noise is not processed at all. The fan noise and the airflow noise will be directly transmitted, and the noise will not be reduced, resulting in a higher noise when the range hood is working. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a range hood that can attenuate some noises of a certain frequency and effectively reduce the exhaust noise of the range hood.

[0005] The range hood according to the present invention comprises: a range hood body and a muffler, wherein the range hood body has an air outlet, the muffler is arranged at the air outlet, and the muffler comprises a plurality of muffler sections connected in sequence, and at least two of the muffler sections have different cross-sectional areas.

[0006] According to the range hood of the present invention, some noises of a certain frequency can be weakened through the cooperation of the range hood body and the muffler, the exhaust noise of the range hood can be effectively reduced, the exhaust noise of the range hood can be improved, thereby reducing the sound power of the whole machine, and further improving user satisfaction.

[0007] Optionally, the plurality of silencer sections include: an inlet silencer section, an intermediate silencer section and an outlet silencer section, the intermediate silencer section is connected between the inlet silencer section and the outlet silencer section, the intermediate silencer section is at least one section, and the cross-sectional area of ​​at least one section of the intermediate silencer section is larger than that of the inlet silencer section and the outlet silencer section.

[0008] Furthermore, the middle sound-absorbing section is a section, and the cross section of the middle sound-absorbing section is rectangular.

[0009] Specifically, the plurality of muffler sections are odd-numbered sections, and the intermediate muffler section includes: a central muffler section, and the cross-sectional area of ​​the muffler section increases in the direction from the inlet muffler section to the central muffler section, and in the direction from the outlet muffler section to the central muffler section; or the intermediate muffler section is an even-numbered section, and the intermediate muffler section includes: a first central muffler section and a second central muffler section, and compared with the second central muffler section, the first central muffler section is closer to the inlet muffler section, and the cross-sectional area of ​​the muffler section increases in the direction from the inlet muffler section to the first central muffler section, and in the direction from the outlet muffler section to the second central muffler section.

[0010] Optionally, the axis of the inlet muffler section and the axis of the outlet muffler section are not colinear.

[0011] Furthermore, the middle sound-absorbing section comprises: a first side wall and a second side wall which are parallel to each other, the inlet sound-absorbing section is arranged close to the first side wall, and the outlet sound-absorbing section is arranged close to the second side wall.

[0012] Specifically, the axis of the inlet muffler section, the axis of the middle muffler section and the axis of the outlet muffler section are located in the same plane.

[0013] Optionally, the cross-sections of the inlet and outlet muffler sections are both circular.

[0014] Furthermore, a plurality of spaced-apart mounting protrusions are provided on the outer periphery of the inlet muffler section.

[0015] Specifically, the muffler is an integrally formed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a range hood according to an embodiment of the present invention;

[0017] Figure 2 is a schematic diagram of a muffler of a range hood according to an embodiment of the present invention;

[0018] Figure 3 is a cross-sectional view of a muffler of a range hood according to an embodiment of the present invention.

[0019] Reference numerals:

[0020] Range hood 10;

[0021] Range hood body 1;

[0022] Muffler 2; inlet 21; outlet 22;

[0023] Silencing section 3; inlet silencing section 31; mounting protrusion 311; middle silencing section 32; first side wall 321; second side wall 322; outlet silencing section 33. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Reference below Figure 1-Figure 3 The range hood 10 according to the embodiment of the present invention is described in detail.

[0028] like Figure 1-Figure 3 As shown, the range hood 10 according to the embodiment of the present invention includes: a range hood body 1 and a muffler 2, the range hood body 1 has an air outlet, the muffler 2 is arranged at the air outlet, the gas in the range hood body 1 will enter the muffler 2 from the air outlet, the muffler 2 may include a plurality of muffler sections 3 connected in sequence, and the cross-sectional areas of at least two muffler sections 3 are different. It should be noted that the cross-sectional areas of the plurality of muffler sections 3 connected in sequence may also be different.

[0029] Among them, the cross-sectional areas of the multiple silencer sections 3 of the silencer 2 are different, and it belongs to an expansion silencer structure. This structure can improve the exhaust noise of the range hood 10. When the gas in the range hood body 1 enters the silencer 2 from the air outlet, the exhaust sound passes through multiple silencer sections 3 connected in sequence, and some noises of a certain frequency will be weakened, making the sound smaller.

[0030] Therefore, through the cooperation between the range hood body 1 and the muffler 2, some noises of a certain frequency can be weakened, the exhaust noise of the range hood 10 can be effectively reduced, and the exhaust noise of the range hood 10 can be improved, thereby reducing the sound power of the whole machine and further improving user satisfaction.

[0031] Alternatively, if Figure 1-Figure 3 As shown, the multiple muffler sections 3 may include: an inlet muffler section 31, an intermediate muffler section 32 and an outlet muffler section 33, the intermediate muffler section 32 is connected between the inlet muffler section 31 and the outlet muffler section 33, the intermediate muffler section 32 is at least one section, and the cross-sectional area of ​​at least one intermediate muffler section 32 is larger than that of the inlet muffler section 31 and the outlet muffler section 33. It should be explained that the number of intermediate muffler sections 32 can be set to be greater than or equal to one section, and the number of intermediate muffler sections 32 with a cross-sectional area greater than that of the inlet muffler section 31 and the outlet muffler section 33 can be greater than or equal to one section. Such a setting can prevent the sound from being directly transmitted from the inlet muffler section 31 to the outlet muffler section 33, and can ensure that the sound will be weakened in the intermediate muffler section 32, thereby ensuring the working performance of the muffler 2. .

[0032] Furthermore, the middle silencer section 32 can be a section, and the cross section of the middle silencer section 32 is rectangular. The middle silencer section 32 configured in this way has good structural strength and can improve the working reliability of the middle silencer section 32.

[0033] Specifically, when multiple silencer sections 3 are set to an odd number of sections, the middle silencer section 32 may include: a central silencer section, the central silencer section refers to the silencer section 3 located in the middle, the number of silencer sections 3 on both sides of the central silencer section is equal, and the cross-sectional area of ​​the silencer section 3 increases in the direction from the inlet silencer section 31 to the central silencer section, and in the direction from the outlet silencer section 33 to the central silencer section. When the sound enters the silencer 2 from the inlet silencer section 31, such a setting can prolong the time of the sound in the central silencer section, thereby better reducing the sound.

[0034] Among them, when the middle silencer section 32 is set to an even-numbered section, the middle silencer section 32 may include: a first central silencer section and a second central silencer section. Compared with the second central silencer section, the first central silencer section is arranged close to the inlet silencer section 31, and the second central silencer section is arranged close to the outlet silencer section 33. In the direction from the inlet silencer section 31 to the first central silencer section, and in the direction from the outlet silencer section 33 to the second central silencer section, the cross-sectional area of ​​the silencer section 3 is increasing. When the sound enters the silencer 2 from the inlet silencer section 31, such a setting can further prolong the time of the sound in the central silencer section, thereby further reducing the sound.

[0035] Optionally, the axis of the inlet muffler section 31 and the axis of the outlet muffler section 33 are not colinear, and the inlet 21 and the outlet 22 of the muffler 2 are not on the same line, but are staggered. Such a setting can prevent the exhaust sound from being directly transmitted to the outside of the muffler 2, thereby ensuring that the muffler 2 has a noise reduction effect, and further improving the working reliability of the muffler 2.

[0036] Furthermore, if Figure 3 As shown, the middle silencer section 32 may include: a first side wall 321 and a second side wall 322 which are parallel to each other, the inlet silencer section 31 is arranged close to the first side wall 321, and the outlet silencer section 33 is arranged close to the second side wall 322. For example, the side wall located on the left side of the middle silencer section 32 is the first side wall 321, and the side wall located on the right side of the middle silencer section 32 is the second side wall 322. Such an arrangement can make the structure of the silencer 2 more reasonable.

[0037] Specifically, the axis of the inlet muffler section 31, the axis of the middle muffler section 32 and the axis of the outlet muffler section 33 are located in the same plane, and, as Figure 3 As shown, the inlet 21 of the silencer 2 has a small area, with a large rectangular cavity in the middle, followed by an outlet 22 with a small cross-section, the cross-sectional area of ​​the inlet silencer section 31 is smaller than the cross-sectional area of ​​the middle silencer section 32, and the cross-sectional area of ​​the outlet silencer section 33 is smaller than the cross-sectional area of ​​the middle silencer section 32. Such a setting can further ensure that the silencer 2 is set as an expansion silencer structure, thereby ensuring that the silencer 2 has a good noise reduction effect.

[0038] Optionally, the cross-sections of the inlet and outlet silencer sections 31 and 33 can be set to be circular. The circular inlet and outlet silencer sections 31 and 33 have good smoothness, which facilitates the assembly of the inlet and outlet silencer sections 31 and 33 with other components, making the assembly simple and convenient.

[0039] Furthermore, a plurality of spaced-apart mounting protrusions 311 are provided on the outer periphery of the silencer section 31. When the silencer 2 is assembled with the range hood body 1, the silencer 2 and the range hood body 1 can be assembled together through the mounting protrusions 311, thereby ensuring that the assembly structure of the silencer 2 and the range hood body 1 is more reliable and stable, thereby improving the working reliability of the range hood 10.

[0040] Specifically, the muffler 2 can be configured as an integrally formed part, the structure of which is more reliable and stable, and can prevent the muffler 2 from cracking, thereby extending the service life of the muffler 2 .

[0041] under Figure 1 The working principle of the silencer 2 is described in detail by taking the range hood 10 as an example.

[0042] When the range hood 10 is working, smoke and noise are discharged from the air outlet of the range hood body 1 and then enter the muffler 2. Specifically, the smoke and noise can first enter the muffler inlet section 31 and then enter the middle muffler section 32. Since the cross-sectional area of ​​the middle muffler section 32 is larger than the cross-sectional area of ​​the muffler inlet section 31, the noise is reduced during the spatial change process. Then the noise enters the muffler outlet section 33. Since the cross-sectional area of ​​the muffler outlet section 33 is smaller than the cross-sectional area of ​​the middle muffler section 32, the noise is reduced during the spatial change process. Finally, the noise discharged with the smoke is less, so the noise generated by the range hood 10 is lower.

[0043] During the whole process, smoke and noise will change from small volume to large volume and then to small volume. This process can effectively reduce noise.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A range hood, characterized in that: include: A range hood body and a muffler, wherein the range hood body has an air outlet, the muffler is arranged at the air outlet, the gas in the range hood body enters the muffler from the air outlet, the muffler comprises a plurality of muffler sections connected in sequence, and at least two of the muffler sections have different cross-sectional areas; The plurality of muffler sections include: an inlet muffler section, an intermediate muffler section and an outlet muffler section, the intermediate muffler section is connected between the inlet muffler section and the outlet muffler section, the intermediate muffler section is at least one section, and the cross-sectional area of ​​at least one section of the intermediate muffler section is larger than that of the inlet muffler section and the outlet muffler section; The middle silencer section is one section, and the cross section of the middle silencer section is rectangular; the plurality of silencer sections are odd-numbered sections, and the middle silencer section includes: a central silencer section, and the cross section area of ​​the silencer section increases in a direction from the inlet silencer section to the central silencer section, and in a direction from the outlet silencer section to the central silencer section; or The intermediate silencer section is an even-numbered section, and the intermediate silencer section includes: a first central silencer section and a second central silencer section. Compared with the second central silencer section, the first central silencer section is closer to the inlet silencer section, and the cross-sectional area of ​​the silencer section increases in the direction from the inlet silencer section to the first central silencer section and in the direction from the outlet silencer section to the second central silencer section; the axis of the inlet silencer section and the axis of the outlet silencer section are not collinear.

2. The range hood according to claim 1, characterized in that: The middle muffler section includes: a first side wall and a second side wall that are parallel to each other, the inlet muffler section is arranged close to the first side wall, and the outlet muffler section is arranged close to the second side wall.

3. The range hood according to claim 1, characterized in that: The axis of the inlet muffler section, the axis of the middle muffler section and the axis of the outlet muffler section are located in the same plane.

4. The range hood according to claim 1, characterized in that: The cross sections of the inlet muffler section and the outlet muffler section are both circular.

5. The range hood according to claim 1, characterized in that: A plurality of spaced-apart mounting protrusions are arranged on the outer periphery of the inlet and outlet muffler sections.

6. The range hood according to claim 1, characterized in that: The muffler is an integrally formed part.

Images