Noise reduction device and range hood using the same

Abstract

The present invention discloses a noise reduction device and a range hood using the same. The noise reduction device includes a range hood bellows shell, the range hood bellows shell is provided with a connecting portion connected to a smoke collecting hood, a plurality of first through holes are provided on at least one side of the range hood bellows shell, and an energy-consuming component connected to the first through hole space is provided on the side of the range hood bellows shell, the energy-consuming component includes: an energy-consuming shell, the energy-consuming shell covers the side of the range hood bellows shell provided with the first through holes, an energy-consuming cavity is provided in the energy-consuming shell, a plurality of second through holes connected to the first through hole space are laterally provided on the upper part of the energy-consuming cavity, a closing device that can gather sound entering from the second through holes is provided in the energy-consuming cavity, and a friction energy-consuming structure is provided in the energy-consuming cavity below the outlet of the closing device, which consumes the energy of the sound waves by friction damping energy consumption, thereby effectively reducing the noise of the range hood.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a noise reduction device and a range hood using the same. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Air volume, air pressure and noise are the core indicators of range hoods.

[0003] In recent years, the domestic range hood market has been focused on high air volume and high suction. As air volume increases, the noise generated by range hoods has also grown. When cooking, turning on the range hood obscures the ability to hear conversations, phone calls, doorbells, and children. This high noise level can even cause irritation, headaches, and heart palpitations in homemakers and kitchen workers. Long-term use can have serious consequences for physical and mental health. Therefore, noise has become a pressing technical issue with existing range hoods. As people's expectations for quality of life rise, users are increasingly concerned about range hood noise levels when purchasing a range hood. The noise performance of a range hood is a key factor in product competitiveness. Summary of the Invention

[0004] The present invention aims to solve one of the problems existing in the existing related technologies to at least a certain extent. To this end, the present invention provides a noise reduction device and a range hood using the same.

[0005] A noise reduction device comprises a range hood bellows shell, the range hood bellows shell is provided with a connecting portion connected to a smoke collecting hood, a plurality of first through holes are provided on at least one side of the range hood bellows shell, and an energy-consuming component connected to the first through hole space is provided on the side of the range hood bellows shell, the energy-consuming component comprises: an energy-consuming shell, the energy-consuming shell covers the side of the range hood bellows shell provided with the first through holes, an energy-consuming cavity is provided in the energy-consuming shell, a plurality of second through holes connected to the first through hole space are laterally provided on the upper part of the energy-consuming cavity, a closing device capable of gathering sound entering from the second through holes is provided in the energy-consuming cavity, and a friction energy-consuming structure is provided in the energy-consuming cavity below the outlet of the closing device.

[0006] Furthermore, the closing device includes a plurality of guide plates;

[0007] When there is one guide plate, the guide plate is arranged obliquely from one side of the energy dissipation cavity to the other side, and a gap is provided between the lower end of the guide plate and the side surface of the energy dissipation cavity;

[0008] When there are two guide plates, the two guide plates are respectively arranged to gather toward the middle from both sides of the energy-consuming cavity, and a gap is provided between the lower ends of the two guide plates.

[0009] Furthermore, the friction energy dissipation structure includes a shaft body provided below the outlet of the closing device, and a rotating wheel is rotatably connected to the shaft body.

[0010] Furthermore, a plurality of protrusions are provided on the circumference of the rotating wheel.

[0011] Furthermore, the protrusion is a dot or a spike.

[0012] Furthermore, a viscous dissipative layer or a friction rubber layer is provided between the shaft and the rotating wheel.

[0013] Furthermore, the circumferential surface of the wheel is a friction surface.

[0014] Furthermore, at least one layer of flexible material is provided between the side surface of the range hood bellows housing and the energy consumption cavity.

[0015] Furthermore, when the flexible material is three-layered, the thickness of the first layer of the flexible material is 10 μm-100 μm, the thickness of the second layer of the flexible material is 100 μm-500 μm, and the thickness of the third layer of the flexible material is 500 μm-2000 μm.

[0016] Furthermore, a plurality of third through holes are provided at the bottom of the energy-consuming cavity, a sound-conducting shell is provided on the outside of the energy-consuming shell at the third through holes, and an opening is provided on the rear side of the sound-conducting shell.

[0017] A range hood comprises the noise reduction device as described above.

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

[0019] The present invention transmits the noise in the bellows into the energy-consuming component through the first through hole, further gathers the noise through the closing device and releases it to the friction energy-consuming structure, consumes the energy of the sound wave by friction damping energy consumption, and effectively reduces the noise of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the three-dimensional schematic diagrams of a noise reduction device of the present invention;

[0021] Figure 2 This is the second three-dimensional schematic diagram of a noise reduction device of the present invention (with the outer plate of the energy-absorbing shell hidden);

[0022] Figure 3 This is the third three-dimensional schematic diagram of a noise reduction device of the present invention (hidden energy-consuming shell);

[0023] Figure 4 This is an exploded perspective schematic diagram of a noise reduction device according to the present invention;

[0024] Figure 5 The figure is a three-dimensional schematic diagram of a range hood according to the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of the technical solutions claimed by the present invention.

[0026] like Figure 1-5 As shown, a noise reduction device includes a range hood bellows housing 1, the range hood bellows housing 1 is provided with a connecting portion connected to a smoke collecting hood, and a plurality of first through holes 10 are provided on at least one side of the range hood bellows housing 1. The first through holes 10 are provided on the side of the range hood bellows housing 1 with an energy-consuming component 2 that is spatially connected to the first through holes 10. The energy-consuming component 2 includes: an energy-consuming shell 20, the energy-consuming shell 20 is covered on the side of the range hood bellows housing 1 with the first through holes 10, and an energy-consuming cavity 21 is provided in the energy-consuming shell 20. A plurality of second through holes 22 spatially connected to the first through hole 10 are laterally provided at the upper part of the energy dissipation cavity 21. A closing device 3 capable of gathering the sound entering from the second through hole 22 is provided in the energy dissipation cavity 21. A friction energy dissipation structure 4 is provided below the outlet of the closing device 3 in the energy dissipation cavity 21. The noise in the bellows is transmitted into the energy dissipation component 2 through the first through hole, and the noise is further gathered by the closing device 3 and released to the friction energy dissipation structure 4. The energy of the sound wave is consumed by friction damping energy consumption, thereby effectively reducing the noise of the range hood.

[0027] The closing device 3 of the present invention includes a plurality of guide plates 30;

[0028] When there is only one guide plate 30, the guide plate 30 is arranged obliquely from one side of the energy dissipation cavity 21 to the other side, and a gap is provided between the lower end of the guide plate 30 and the side surface of the energy dissipation cavity 21. After the noise enters the energy dissipation cavity 21 through the second through hole 22, it gradually gathers along the guide plate 30 and finally exits from the gap.

[0029] When there are two guide plates 30, the two guide plates 30 are respectively arranged to gather toward the middle from both sides of the energy dissipation cavity 21, and a gap is provided between the lower ends of the two guide plates 30. After the sound waves enter the energy dissipation cavity 21 through the second through hole 22, they gradually gather toward the middle along the guide plates 30 on both sides, and finally transmit out from the gap.

[0030] The friction energy dissipation structure 4 of the present invention includes a shaft 40 provided below the outlet of the closing device 3, and a runner 41 is rotatably connected to the shaft 40. After the sound wave is transmitted through the gap, the energy of the back-and-forth vibration drives the runner 41 to rotate, and the energy of the sound wave is consumed by the friction damping energy between the shaft 40 and the runner 41.

[0031] The runner 41 of the present invention is provided with a plurality of protrusions 42 on its circumference. The protrusions 42 are dots or spikes. By providing a plurality of protrusions 42 on its circumference, the rotational force of the runner 41 is increased, thereby increasing the friction with the shedding vortex.

[0032] In the present invention, a viscous dissipative layer or a friction rubber layer is provided between the shaft 40 and the rotating wheel 41. The viscous dissipative layer or the friction rubber layer is provided to increase the friction between the shaft 40 and the rotating wheel 41, thereby enhancing the effect of consuming sound wave energy.

[0033] The circumferential surface of the runner 41 of the present invention is a friction surface, which can increase the rotational force of the runner 41, thereby increasing the friction force with the shedding vortex.

[0034] At least one layer of flexible material 5 is provided between the side of the range hood bellows housing 1 and the energy dissipation cavity 21 of the present invention. The flexible material 5 can be bonded by glue while ensuring that the flexible material 5 has a certain prestress to achieve a better noise reduction effect.

[0035] When the flexible material 5 of the present invention is three-layered, the thickness of the first layer of the flexible material 5 is 10 μm-100 μm, the thickness of the second layer of the flexible material 5 is 100 μm-500 μm, and the thickness of the third layer of the flexible material 5 is 500 μm-2000 μm. The thickness of the first layer of flexible material 5 is 10 μm-100 μm, which can resonate with the noise in the frequency band of 500 Hz-700 Hz, thereby reducing the noise of 500 Hz-700 Hz; the thickness of the second layer of flexible material 5 is 100 μm-500 μm, which can resonate with the noise in the frequency band of 300 Hz-500 Hz, thereby reducing the noise of 300 Hz-500 Hz; the thickness of the third layer of flexible material 5 is 500 μm-2000 μm, which can resonate with the noise in the frequency band of 150 Hz-300 Hz, and through the damping and silencing effect of the material, the noise of 300 Hz-700 Hz can be reduced.

[0036] The energy-consuming cavity 21 of the present invention is provided with a plurality of third through holes 11 at the bottom, and a sound-conducting shell 12 is provided on the outside of the energy-consuming shell 20 at the third through holes 11. The rear side of the sound-conducting shell 12 is provided with an opening. After energy consumption by the friction energy-consuming structure 4, the final sound wave is transmitted from the third through hole 11 and is guided to the rear through the sound-conducting shell 12, thereby reducing the noise impact on the user located in front of the range hood.

[0037] A range hood comprises the noise reduction device as described above.

[0038] The specific implementation methods described above provide a detailed description of the technical solutions and beneficial effects of the present invention. It should be understood that the above is only the most preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, supplements and equivalent substitutions made within the scope of the principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A noise reduction device, comprising a range hood bellows housing (1), wherein the range hood bellows housing (1) is provided with a connection portion connected to a smoke collecting hood, characterized in that: A plurality of first through holes (10) are provided on at least one side of the range hood bellows housing (1); an energy-consuming assembly (2) in spatial communication with the first through holes (10) is provided on the side of the range hood bellows housing (1); the energy-consuming assembly (2) comprises: an energy-consuming shell (20); the energy-consuming shell (20) covers the side of the range hood bellows housing (1) in which the first through holes (10) are provided; an energy-consuming cavity (21) is provided in the energy-consuming shell (20); a plurality of second through holes (22) in spatial communication with the first through holes (10) are provided on the upper portion of the energy-consuming cavity (21); and a plurality of third through holes (11) are provided on the bottom of the energy-consuming cavity (21); A closing device (3) capable of collecting sound entering from the second through hole (22) is provided in the energy dissipation cavity (21), and a friction energy dissipation structure (4) is provided below the outlet of the closing device (3) in the energy dissipation cavity (21); The noise in the bellows is transmitted into the energy-consuming component (2) through the first through hole (10), and the noise is further gathered by the closing device (3) and released to the friction energy-consuming structure (4). After energy is consumed by the friction energy-consuming structure (4), the final sound wave is transmitted out from the third through hole (11); The friction energy dissipation structure (4) comprises a shaft (40) provided below the outlet of the closing device (3), and a rotating wheel (41) is rotatably connected to the shaft (40).

2. The noise reduction device according to claim 1, characterized in that The closing device (3) includes a plurality of guide plates (30); When there is one guide plate (30), the guide plate (30) is arranged obliquely from one side of the energy dissipation cavity (21) to the other side, and a gap is provided between the lower end of the guide plate (30) and the side surface of the energy dissipation cavity (21); When there are two guide plates (30), the two guide plates (30) are respectively arranged to gather from both sides of the energy dissipation cavity (21) toward the middle, and a gap is provided between the lower ends of the two guide plates (30).

3. The noise reduction device according to claim 1 or 2, characterized in that: A plurality of protrusions (42) are provided on the circumference of the rotating wheel (41).

4. The noise reduction device according to claim 3, characterized in that: The protrusion (42) is a dot or a spike.

5. The noise reduction device according to claim 3, characterized in that: A viscous dissipative layer or a friction rubber layer is provided between the shaft (40) and the rotating wheel (41).

6. The noise reduction device according to claim 3, characterized in that: The circumferential surface of the rotating wheel (41) is a friction surface.

7. The noise reduction device according to claim 1 or 2, characterized in that: At least one layer of flexible material (5) is provided between the side surface of the range hood bellows housing (1) and the energy-consuming cavity (21).

8. The noise reduction device according to claim 7, characterized in that: When the flexible material (5) is three-layered, the thickness of the first layer of the flexible material (5) is 10 μm-100 μm, the thickness of the second layer of the flexible material (5) is 100 μm-500 μm, and the thickness of the third layer of the flexible material (5) is 500 μm-2000 μm.

9. The noise reduction device according to claim 1 or 2, characterized in that: A sound guide housing (12) is provided outside the energy-consuming housing (20) at the third through hole (11), and an opening is provided at the rear side of the sound guide housing (12).

10. A range hood, characterized in that: The range hood comprises the noise reduction device according to any one of claims 1 to 9.

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