Noise reduction device and range hood applying same

Abstract

The utility model discloses a noise reduction device and a range hood applying the noise reduction device. The noise reduction device comprises a box body, a box cover and a sound absorption part, the box body is further provided with a blocking edge which is connected with the cavity wall of the containing cavity and is close to the opening in the front side. The blocking edge is located in front of the sound absorption piece and used for conducting front limiting on the sound absorption piece. And the box cover is rotationally connected with the box body, so that the front side opening can be opened or closed. Front limiting is conducted on the sound absorption part through the arrangement of the blocking edge, and the sound absorption part can be located at the needed position easily; the box cover and the box body are rotationally connected, a user can take and place the sound-absorbing cotton by rotating the box cover, operation can be carried out with bare hands, hardware tools are not needed, and operation is convenient.

Description

Technical Field

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

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It draws in and exhausts cooking fumes through a centrifugal fan installed inside the hood. The centrifugal fan consists of a volute, an impeller mounted within the volute, and a motor that drives the impeller. As the impeller rotates, negative pressure is generated at the center of the fan, drawing cooking fumes into the fan and then out.

[0003] During the operation of the range hood, since the motor drives the impeller to rotate in the volute, the operation of the motor and the vibration of the volute will generate noise, affecting the user experience. In order to reduce noise, a noise reduction device is often provided. The noise reduction device generally includes a sound-absorbing box and a sound-absorbing member located in the sound-absorbing box. The sound-absorbing box is in the shape of a cover, and the sound-absorbing box and the inner wall of the range hood are fixed by screws. For example, the Chinese patent application number CN202122240365.X previously applied by the applicant is "A noise reduction component and a range hood using the noise reduction component".

[0004] The sound-absorbing box, as a key component for storing sound-absorbing cotton, plays a crucial role in reducing noise and absorbing some oil. Over time, the sound-absorbing cotton will absorb a large amount of oil, reducing the sound insulation effect. It will also emit an oily odor, affecting the user experience. Therefore, the sound-absorbing cotton needs to be replaced after a period of use. To replace the sound-absorbing cotton, you need to use hardware tools to unscrew the four screws securing the box, remove the old sound-absorbing cotton, and then re-tighten the screws after installing the new sound-absorbing cotton, which is inconvenient. Utility Model Content

[0005] The first technical problem to be solved by the present invention is to provide a noise reduction device which is convenient for taking and placing the sound absorbing member in view of the current status of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide a range hood.

[0007] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is as follows: a noise reduction device includes a box body having a receiving cavity for receiving a sound absorbing member and a front opening communicating with the receiving cavity;

[0008] A box cover is arranged at the front opening;

[0009] A sound absorbing member is arranged in the accommodating cavity and has a sound absorbing through hole;

[0010] At least one of the box body and the box cover is provided with a through hole for allowing sound to enter the sound absorbing member;

[0011] Its characteristics are:

[0012] The box body also has a rib connected to the cavity wall of the accommodating cavity and adjacent to the front opening, the rib is located in front of the sound absorbing member and is used to limit the front position of the sound absorbing member;

[0013] The box cover is rotatably connected to the box body and can open or close the front opening.

[0014] In order to locate the closed position of the lid, the lid is positioned in front of the retaining edge. In this way, the retaining edge can also locate the closed position of the lid. When the lid contacts the retaining edge, the user can know that the lid has been closed to the position required.

[0015] In order to improve the front limiting effect on the sound absorbing member, the box cover is located in the front opening. In this way, the box cover can also play a front limiting effect on the sound absorbing member, and the sound absorbing member is not easy to fall out forward.

[0016] To enhance the positional restraint of the sound-absorbing element, the rib is annular, with its inner circumferential wall defining the front opening. The annular rib provides a larger contact area with the sound-absorbing element, thereby enhancing the positional restraint. Alternatively, the ribs may be block-shaped, with at least two ribs spaced apart.

[0017] In order to improve the noise reduction effect, the noise reduction device also includes

[0018] The partition is movably constrained in the accommodating cavity and is located behind the retaining edge. The partition divides the accommodating cavity of the box body into an installation cavity for accommodating the sound absorbing component and a sound absorbing cavity spaced apart from the installation cavity.

[0019] By providing a partition, a sound absorbing cavity can be formed in front of or behind the sound absorbing member, which is beneficial for further reflection of noise in the sound absorbing cavity and further absorption of noise by the sound absorbing member, thereby improving the noise reduction effect.

[0020] There can be various connection structures between the separator and the box body. Preferably, the box body has a limiting hole that penetrates the wall thickness;

[0021] The partition comprises a limit block located in the accommodating cavity, a connecting rod with one end threadedly connected to the limit block and the other end extending out of the box body, and a toggle portion connected to the other end of the connecting rod;

[0022] When the toggle portion is aligned with the limiting hole, the toggle portion can enter and exit the limiting hole;

[0023] When the toggle portion is in a state of being misaligned with the limiting hole, the partition is constrained on the box body.

[0024] In this way, by acting on the toggle part, on the one hand, the toggle part can be located in different positions relative to the limiting hole to facilitate entry and exit of the limiting hole. On the other hand, the position between the connecting rod and the limiting block can be adjusted to make the limiting block located in the required position, so that the limiting block can be suitable for different sound-absorbing parts.

[0025] In order to be suitable for sound-absorbing parts with different thicknesses in the front and rear directions, the limit block includes a front limit plate, a rear limit plate spaced apart from the front limit plate, and an elastic part located between the front limit plate and the rear limit plate and connected to the front limit plate and the rear limit plate. The elastic part has a tendency to stretch the front limit plate and the rear limit plate along the front and rear directions so that the corresponding limit plate acts on the sound-absorbing part.

[0026] In this way, the partition is elastic and has a wide adjustment range, and can be well adapted to sound absorbing members of different thicknesses in the front and rear directions.

[0027] To accommodate sound absorbing members of varying thicknesses in the front-to-back direction, the separator is elastic and acts on the sound absorbing member in the front-to-back direction, tending to keep the sound absorbing member in a predetermined position. This elasticity allows for a wide adjustment range, effectively accommodating sound absorbing members of varying thicknesses in the front-to-back direction.

[0028] The technical solution adopted by the present invention to solve the second technical problem is: a range hood, characterized in that it includes the noise reduction device as described above.

[0029] The box body can be installed in various positions. Preferably, the box body has a rear opening communicating with the accommodating cavity.

[0030] The range hood comprises a vertically extending panel, the rear side of the box body is connected to the panel, and the panel, the box body and the box cover form an accommodating space for accommodating the sound absorbing component.

[0031] Compared with the existing technology, the advantages of the present invention are: by setting the rib to limit the front position of the sound-absorbing component, it is conducive to the sound-absorbing component being in the required position; the box cover and the box body are rotatably connected, and the user can take out and put the sound-absorbing cotton by rotating the box cover, and it can be operated with bare hands without using hardware tools, which is relatively convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of a noise reduction device according to an embodiment of the present utility model;

[0033] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0034] Figure 3 for Figure 1 Cross-section along AA direction;

[0035] Figure 4 for Figure 3 A magnified schematic diagram of part B in the middle;

[0036] Figure 5 for Figure 1 Schematic diagram after removing the sound-absorbing parts;

[0037] Figure 6 This is a schematic diagram of the assembly of the box body and the separator according to an embodiment of the present utility model;

[0038] Figure 7 for Figure 6 A magnified schematic diagram of the local C in the middle;

[0039] Figure 8 This is a schematic diagram of a box body in an embodiment of the present utility model;

[0040] Figure 9 Schematic diagram of a separator in an embodiment of the present utility model;

[0041] Figure 10 This is an exploded view of a separator in an embodiment of the present utility model;

[0042] Figure 11 for Figure 6 Cross-section along DD direction;

[0043] Figure 12 This is a schematic diagram of the assembly of the noise reduction device and the panel according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0044] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0045] See also Figures 1 to 11 , which is a preferred embodiment of the noise reduction device of the present invention. The noise reduction device includes a box body 1, a box cover 2, a partition 3, and a sound absorbing member 4.

[0046] Among them, see Figures 1 to 5 , Figures 6 to 8 The box body 1 has a accommodating cavity 11 for accommodating the sound absorbing member 4, a front opening 12 connected to the accommodating cavity 11, and a rear opening 15 connected to the accommodating cavity 11; the box body 1 also has a rib 13 connected to the cavity wall of the accommodating cavity 11 and adjacent to the front opening 12, and a limiting hole 14 that passes through the wall thickness of the box body 1; the rib 13 is annular, and its inner circumferential wall defines the front opening 12.

[0047] See also Figures 1 to 5The lid 2 is positioned at the front opening 12. Both the lid 2 and the body 1 have holes 10 formed therein to allow sound to enter the sound-absorbing element 4. The rib 13 is located in front of the sound-absorbing element 4 and serves to limit the front position of the sound-absorbing element 4. The number and position of the sound-absorbing holes 10 can be adjusted as needed. The lid 2 is rotatably connected to the body 1 via a shaft, enabling the front opening 12 to be opened or closed. The lid 2 is located in front of the rib 13. Alternatively, the lid 2 can be located within the front opening 12. The lid 1 is divided into two parts 21 and 22, which are rotatably connected to the body 1. Alternatively, the lid 1 can be formed as a single piece.

[0048] See also Figure 4 The partition 3 is movably constrained in the accommodating cavity 11 and is located behind the retaining edge 13. The partition 3 divides the accommodating cavity 11 of the box body 1 into an installation cavity 111 for accommodating the sound absorbing element 4 and a sound absorbing cavity 112 spaced apart from the installation cavity 111. Figures 9 to 11 The separator 3 includes a stopper 31 located within the accommodating cavity 11, a connecting rod 32 having one end threadedly connected to the stopper 31 and the other end extending outside the box body 1, and a toggle portion 33 connected to the other end of the connecting rod 32. When the toggle portion 33 is aligned with the stopper hole 14, the toggle portion 33 can enter and exit the stopper hole 14. When the toggle portion 33 is misaligned with the stopper hole 14, the separator 3 is constrained to the box body 1. The stopper 31 includes a front stopper plate 311, a rear stopper plate 312 spaced apart from the front stopper plate 311, and an elastic member 313 located between and connected to the front and rear stopper plates 311 and 312. The elastic member 313 has a tendency to spread the front and rear stopper plates 311 and 312 apart in the front-to-back direction, causing the corresponding stopper plates to act on the sound absorbing member 4. The partition 3 is elastic, such as the elastic member 313 described above. It acts on the sound absorbing member 4 in the front-to-back direction, tending to keep the sound absorbing member 4 in a predetermined position. The structure of the partition 3 can also be adjusted as needed. The partition 3 can be located behind the sound absorbing member 4, in which case a sound absorbing chamber 112 is formed behind the sound absorbing member 4, and the sound absorbing member 4 is confined between the retaining edge 13 and the partition 3. The partition 3 can also be located in front of the sound absorbing member 4, in which case a sound absorbing chamber 112 is formed in front of the sound absorbing member 4, and the sound absorbing member 4 is confined between the mounting base (such as the panel 100 described below) for the box body 1 and the partition 3. Noise can be reflected within the sound absorbing chamber 112, which helps the sound absorbing member 4 further absorb noise, thereby improving the noise reduction effect.

[0049] The sound-absorbing member 4 is disposed within the accommodating cavity 11 and has a sound-absorbing through-hole 41. The sound-absorbing member 4 is made of sound-absorbing cotton, but other materials are also acceptable. After a period of use, the sound-absorbing cotton becomes larger due to the accumulation of oil and dirt. At this time, the positioning of the separator 3 exerts a certain degree of compression on the sound-absorbing cotton, facilitating the removal of oil and dirt from the cotton and providing a certain degree of self-cleaning effect.

[0050] This embodiment also includes a range hood, see Figure 12 The range hood includes the aforementioned noise reduction device and a vertically extending panel 100. The rear side of the housing 1 is connected to the panel 100. The panel 100, the housing 1, and the lid 2 form a space for accommodating the sound-absorbing element 4. The panel 100 is a portion of the fan frame. The housing 1 is connected to the inner wall of the fan frame and faces the air inlet of the volute (not shown).

[0051] The working principle and usage are as follows.

[0052] Connect the box body 1 to the panel 100, open the box cover 2, install the partition 3 and the sound absorbing member 4, turn the toggle part 33, adjust the limit block 31 to the required position, so that the sound absorbing member 4 is in the required position, and use the retaining edge 13 to limit the front position of the sound absorbing member 4, and then close the box cover 2. Figure 3 、 Figure 4 The partition 3 is located behind the sound absorbing member 4 , and a sound absorbing cavity 112 is formed behind the sound absorbing member 4 .

[0053] After the noise passes through the sound absorbing holes 10 of the box body 1 and the box cover 2, part of it is quickly absorbed by the sound absorbing member 4, and the other part is reflected in the sound absorbing cavity 112 and then further absorbed by the sound absorbing member 4, which is conducive to improving the noise reduction effect.

[0054] After using for a period of time, when the sound absorbing member 4 needs to be replaced, the box cover 2 can be directly rotated to replace the sound absorbing member 4. The operation can be done by hand without the use of hardware tools. The operation is relatively convenient, the rotation structure is stable, and the service life is long.

[0055] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A noise reduction device comprising The box body (1) has a receiving cavity (11) for receiving the sound absorbing member (4) and a front opening (12) communicating with the receiving cavity (11); A box cover (2) is arranged at the front opening (12); A sound absorbing member (4) is disposed in the accommodating cavity (11) and has a sound absorbing through hole (41); At least one of the box body (1) and the box cover (2) is provided with a through hole (10) for allowing sound to enter the sound absorbing member (4); Its characteristics are: The box body (1) further comprises a retaining edge (13) connected to the cavity wall of the accommodating cavity (11) and adjacent to the front opening (12); the retaining edge (13) is located in front of the sound absorbing member (4) and is used to limit the front position of the sound absorbing member (4); The box cover (2) is rotatably connected to the box body (1) and can open or close the front opening (12).

2. The noise reduction device according to claim 1, characterized in that: The box cover (2) is located in front of the retaining edge (13).

3. The noise reduction device according to claim 1, wherein: The box cover (2) is located in the front opening (12).

4. The noise reduction device according to claim 1, wherein: The retaining edge (13) is annular, and its inner peripheral wall defines the front opening (12).

5. The noise reduction device according to claim 1, wherein: The noise reduction device also includes A partition (3) is movably constrained in the accommodating cavity (11) and is located behind the retaining edge (13). The partition (3) divides the accommodating cavity (11) of the box body (1) into a mounting cavity (111) for accommodating the sound absorbing element (4) and a sound absorbing cavity (112) spaced apart from the mounting cavity (111).

6. The noise reduction device according to claim 5, characterized in that: The box body (1) has a limiting hole (14) penetrating the wall thickness; The partition (3) comprises a limit block (31) located in the accommodating cavity (11), a connecting rod (32) one end of which is threadedly connected to the limit block (31) and the other end of which extends out of the box body (1), and a toggle portion (33) connected to the other end of the connecting rod (32); When the toggle portion (33) is aligned with the limiting hole (14), the toggle portion (33) can enter and exit the limiting hole (14); The shifting portion (33) is in a state of being misaligned with the limiting hole (14), and the partition (3) is constrained on the box body (1).

7. The noise reduction device according to claim 6, characterized in that: The limiting block (31) comprises a front limiting plate (311), a rear limiting plate (312) spaced apart from the front limiting plate (311), and an elastic member (313) located between the front limiting plate (311) and the rear limiting plate (312) and connected to the front limiting plate (311) and the rear limiting plate (312). The elastic member (313) has a tendency to spread the front limiting plate (311) and the rear limiting plate (312) apart in a front-to-back direction so that the corresponding limiting plate acts on the sound absorbing member (4).

8. The noise reduction device according to claim 5, characterized in that: The partition (3) is elastic and acts on the sound absorbing member (4) in the front-back direction, thereby tending to place the sound absorbing member (4) in a preset position.

9. A range hood, characterized in that: The noise reduction device comprises the noise reduction device according to any one of claims 1 to 8.

10. The range hood according to claim 9, characterized in that: The box body (1) has a rear opening (15) communicating with the accommodating cavity (11); The range hood comprises a vertically extending panel (100), the rear side of the box body (1) is connected to the panel (100), and the panel (100), the box body (1), and the box cover (2) form a storage space for accommodating a sound absorbing component (4).

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