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CN-224230100-U - Noise reduction device of range hood and range hood

CN224230100UCN 224230100 UCN224230100 UCN 224230100UCN-224230100-U

Abstract

The utility model belongs to the technical field of range hoods, and particularly discloses a noise reduction device of a range hood and the range hood. According to the noise reduction device of the range hood and the range hood, provided by the utility model, the distribution and arrangement structures of the first boss and the plurality of diffusion grooves enable noise sound waves to be diffused, the noise sound waves are reflected to different directions, the directional reflection of the noise sound waves is broken, and as the noise sound waves are reflected and refracted for multiple times, the sound wave energy of the noise sound waves is greatly consumed in the range hood shell of the range hood, the effect of effectively reducing the sound wave energy of the noise is realized, and further, the sound beside the ear of a user is reduced.

Inventors

  • FAN DONGZHI
  • SUN JINGLONG
  • YU MINGYUE
  • REN FUJIA
  • LI ZHIBAO

Assignees

  • 杭州老板电器股份有限公司

Dates

Publication Date
20260512
Application Date
20250514

Claims (11)

  1. 1. The noise reduction device of the range hood is characterized by comprising a noise reduction plate (1), wherein a first boss (2) and a plurality of diffusion grooves (3) are arranged on the first side of the noise reduction plate (1), the first boss (2) and the diffusion grooves (3) are sequentially and closely arranged along a first direction, the groove depths of the diffusion grooves (3) are different, and each end face of the side wall of the diffusion groove (3) is flush with the surface of the first boss (2).
  2. 2. The noise reduction device of a range hood according to claim 1, wherein six diffusion grooves (3) are respectively defined as a first diffusion groove (31), a second diffusion groove (32), a third diffusion groove (33), a fourth diffusion groove (34), a fifth diffusion groove (35) and a sixth diffusion groove (36), the height of the first boss (2) is d0, the depth of the first diffusion groove (31) is d1, the depth of the second diffusion groove (32) is d2, the depth of the third diffusion groove (33) is d3, the depth of the fourth diffusion groove (34) is d4, the depth of the fifth diffusion groove (35) is d5, the depth of the sixth diffusion groove (36) is d6, d0:d1:d2:d3:d5:d6=0:1:4:2:4:1.
  3. 3. A noise reduction device of a range hood according to claim 2, characterized in that the depth of the first diffusion groove (31) Where c is the speed of sound and f r is the target frequency for noise reducer control.
  4. 4. The noise reduction device of a range hood according to claim 2, wherein the second side of the noise reduction plate (1) is concavely arranged towards the first side, a second boss (11), a third boss (12) and a fourth boss (13) which are arranged at intervals and have the same height are formed on the first side of the noise reduction plate (1), the second diffusion groove (32) is formed between the second boss (11) and the third boss (12), the fifth diffusion groove (35) is formed between the third boss (12) and the fourth boss (13), the first diffusion groove (31) is concavely arranged on the second boss (11), the first boss (2) is simultaneously formed, the third diffusion groove (33) and the fourth diffusion groove (34) are concavely arranged on the third boss (12), and the sixth diffusion groove (36) is concavely arranged on the fourth boss (13).
  5. 5. The noise reduction device of a range hood according to claim 4, wherein the surface of the first boss (2), the groove bottom of the first diffusion groove (31), the groove bottom of the third diffusion groove (33), the groove bottom of the fourth diffusion groove (34) and the groove bottom of the sixth diffusion groove (36) are provided with noise reduction holes (14).
  6. 6. The noise reduction device of a range hood according to claim 5, wherein the aperture of the noise reduction holes (14) is 1.5mm-3mm, and the distance between two adjacent noise reduction holes (14) is 8mm-15mm.
  7. 7. The noise reduction device of a range hood according to claim 5, characterized in that a first groove (15), a second groove (16) and a third groove (17) are formed on the second side of the noise reduction plate (1), and the first groove (15), the second groove (16) and the third groove (17) are respectively filled with a sound absorbing member (4).
  8. 8. The noise reduction device of a range hood according to any one of claims 1 to 7, wherein the diffusion grooves (3) have the same width, and the diffusion grooves (3) have a width of 25mm or more.
  9. 9. The noise reduction device of a range hood according to any one of claims 1 to 7, wherein the first direction is a length direction of the noise reduction plate (1), a width direction of the noise reduction plate (1) is a second direction, the first boss (2) and the plurality of diffusion grooves (3) are arranged in sequence and in close proximity to each other along the length direction of the noise reduction plate (1), and the first boss (2) and the plurality of diffusion grooves (3) extend along the width direction of the noise reduction plate (1); Or, the first direction is the width direction of the noise reduction plate (1), the length direction of the noise reduction plate (1) is the second direction, the first boss (2) and the diffusion grooves (3) are sequentially and closely arranged along the width direction of the noise reduction plate (1), and the first boss (2) and the diffusion grooves (3) extend along the length direction of the noise reduction plate (1).
  10. 10. The range hood is characterized by comprising a range hood shell (100), wherein a fan assembly (200) and the noise reduction device of the range hood according to any one of claims 1-9 are arranged in the range hood shell (100), the noise reduction plate (1) is arranged on the inner side wall of the range hood shell (100), and the first side of the noise reduction plate (1) faces the fan assembly (200).
  11. 11. The range hood according to claim 10, characterized in that at least one side wall of the hood housing (100) opposite to the air inlet of the fan assembly (200) is provided with the noise reduction plate (1), and a first side of the noise reduction plate (1) is directed towards the air inlet of the fan assembly (200).

Description

Noise reduction device of range hood and range hood Technical Field The utility model relates to the technical field of range hoods, in particular to a noise reduction device of a range hood and the range hood. Background As a smoke exhaust device of a kitchen core, noise control of the smoke exhaust device has become a key index for affecting user experience. The noise reduction means generally adopted in the industry at present mainly comprises (1) adding a rubber shock pad on a motor base, reducing low-frequency vibration noise by blocking structure sound transmission, but not inhibiting medium-high frequency air sound caused by airflow turbulence, (2) attaching porous sound absorption cotton (such as polyurethane foam material) on the inner wall of an air duct, absorbing sound energy of a specific frequency band by using pore resonance, wherein the sound absorption coefficient of a single sound absorption structure in a low frequency band below 200Hz is less than 0.3, the air duct resistance is increased by a dense material, so that the air discharge quantity is reduced by 15% -20%, and (3) adopting a Helmholtz resonance cavity design, and realizing narrow-band noise reduction by adjusting the volume and the neck size of the cavity, wherein the effective bandwidth is generally less than 1/3 octave, and the broadband noise of the range hood is difficult to cover. In summary, the prior art has the defects that the thickness of the traditional sound absorbing material has space contradiction with the compact structure of the range hood, the frequency response characteristic and the noise spectrum matching degree of the passive noise reduction device are low, the comprehensive noise reduction amount is insufficient, and the composite sound insulation cover scheme can improve the noise reduction effect, but the air quantity is lost due to the defect of aerodynamic appearance design. Disclosure of utility model The utility model aims to provide a noise reduction device of a range hood and the range hood, which have the characteristics of broadband sound absorption, low airflow impedance and modularized maintenance, and improve the use experience of users. To achieve the purpose, the utility model adopts the following technical scheme: In a first aspect, a noise reduction device of a range hood is provided, including a noise reduction plate, a first side of the noise reduction plate is provided with a first boss and a plurality of diffusion grooves, the first boss and the diffusion grooves are sequentially and closely arranged along a first direction, groove depths of the diffusion grooves are different, and an end face of a side wall of each diffusion groove is flush with a surface of the first boss. As an alternative technical scheme of the noise reduction device of the range hood, six diffusion grooves are respectively defined as a first diffusion groove, a second diffusion groove, a third diffusion groove, a fourth diffusion groove, a fifth diffusion groove and a sixth diffusion groove, the height of the first boss is d0, the depth of the first diffusion groove is d1, the depth of the second diffusion groove is d2, the depth of the third diffusion groove is d3, the depth of the fourth diffusion groove is d4, the depth of the fifth diffusion groove is d5, the depth of the sixth diffusion groove is d6, d0:d1:d2:d3:d4:d5:d6=0:1:4:2:4:1. As an optional technical scheme of the noise reduction device of the range hood, the depth of the first diffusion grooveWhere c is the speed of sound and f r is the target frequency for noise reducer control. As an optional technical scheme of the noise reduction device of the range hood, the second side of the noise reduction plate is concavely arranged towards the first side, a second boss, a third boss and a fourth boss which are arranged at intervals and have the same height are formed on the first side of the noise reduction plate, a second diffusion groove is formed between the second boss and the third boss, a fifth diffusion groove is formed between the third boss and the fourth boss, a first diffusion groove is concavely formed on the second boss, a first boss is simultaneously formed, a third diffusion groove and a fourth diffusion groove are concavely formed on the third boss, and a sixth diffusion groove is concavely formed on the fourth boss. As an alternative technical scheme of the noise reduction device of the range hood, noise reduction holes are formed in the surface of the first boss, the bottom of the first diffusion groove, the bottom of the third diffusion groove, the bottom of the fourth diffusion groove and the bottom of the sixth diffusion groove. As an alternative technical scheme of the noise reduction device of the range hood, the aperture of the noise reduction hole is 1.5mm-3mm, and the distance between two adjacent noise reduction holes is 8mm-15mm. As an optional technical scheme of the noise reduction device of the range hood, a first groove, a