Multi-cavity series noise reduction piece and range hood

Abstract

The utility model discloses a multi-cavity series noise reduction piece and a range hood, and belongs to the technical field of household appliances. The multi-cavity series noise reduction part comprises a noise reduction female cavity, a containing space is formed, a female sound absorption plate is arranged on the noise reduction female cavity, and a plurality of first sound absorption holes are formed in the female sound absorption plate. The noise reduction device further comprises at least one noise reduction sub-cavity arranged in the containing space, a sub-acoustic board is arranged on the noise reduction sub-cavity, and a plurality of second sound absorption holes are formed in the sub-acoustic board. According to the technical scheme of the utility model, at least two cavities with a plurality of sound absorption holes are arranged and matched with the two layers of sound absorption plates to form a reinforced sound absorption structure in which a large cavity is sleeved with a small cavity and a cavity is arranged in the cavity, so that an optimized noise reduction effect is obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and in particular relates to a multi-cavity series noise reduction component and a range hood. Background Art

[0002] Kitchen noise is an important part of household noise, and the noise generated by the range hood when it is working is an inevitable part of kitchen noise. This is because when the range hood is working, the user is often close to it, and the noise has a more obvious impact on the user. It is also reflected in the peak cooking period, when the exhaust resistance increases. At this time, the range hood with a variable frequency motor will increase the speed of the motor to obtain higher oil fume suction, thereby bringing more obvious noise.

[0003] In this regard, in the prior art, noise is often reduced by setting sound-absorbing materials in the air duct, but the effect is often limited, and it is necessary to optimize the suction structure to obtain a better noise reduction effect. Utility Model Content

[0004] In view of the above technical problems, the present application further improves the structure of the prior art in order to provide a multi-cavity series noise reduction component. One of the purposes of the present utility model is to provide a multi-cavity series noise reduction component, and the second purpose is to provide a corresponding range hood.

[0005] The specific technical solutions are described below:

[0006] Multi-cavity series noise reduction components include:

[0007] A noise reduction mother cavity forms an accommodating space, a mother sound absorbing board is arranged on the noise reduction mother cavity, and a plurality of first sound absorbing holes are opened on the mother sound absorbing board;

[0008] At least one noise reduction sub-cavity is arranged in the accommodating space, a sub-sound absorbing plate is arranged on the noise reduction sub-cavity, and a plurality of second sound absorbing holes are opened on the sub-sound absorbing plate;

[0009] Noise reduction involves the energy conversion and attenuation of sound. When sound waves encounter sound-absorbing materials or structures, part of the sound energy will be converted into heat energy. For porous materials, after the sound waves are incident on the pores, they interact with the air molecules in the pores, resulting in reflection, scattering and absorption, which can reduce the propagation of noise; for multi-level cavity structures, sound waves are more likely to be reflected and scattered in the cavity, but not easy to propagate out, and then consumed to the point of annihilation; the above technical solution sets at least two cavities with a number of sound-absorbing holes, and cooperates with two levels of sound-absorbing panels to form a large cavity inside a small cavity, a cavity within a cavity type of enhanced sound-absorbing structure, so as to obtain an optimized noise reduction effect.

[0010] Preferably, the noise reduction sub-cavity is composed of a plurality of sub-cavity units;

[0011] The above technical solution is easy to adapt to noise reduction components of different specifications, and can be used in various models of range hoods.

[0012] Further preferably, each sub-cavity unit is provided with a unit sound absorbing panel constituting a sub-sound absorbing panel, and a second sound absorbing hole is opened on the unit sound absorbing panel.

[0013] Further preferably, a sound absorbing baffle is provided in the sub-cavity unit to divide the sub-cavity unit into at least two cavities, and a third sound absorbing hole is provided on the sound absorbing baffle;

[0014] The above technical solution further refines the levels of the noise reduction cavity to obtain a better noise reduction effect.

[0015] Further preferably, the sound absorbing baffle and the unit sound absorbing panel have different orientation angles;

[0016] The above technical solution increases the efficiency of capturing sound waves by setting different orientation angles.

[0017] Further preferably, the accommodating space includes at least two noise reduction sub-cavities, forming at least two sub-sound absorbing panels facing in different directions;

[0018] The above technical solution increases the efficiency of capturing sound waves by using sub-sound absorbing panels in different directions.

[0019] Preferably, the apertures of the first sound absorption hole, the second sound absorption hole and the third sound absorption hole are all less than 1 mm.

[0020] Preferably, the sub-cavity unit is a block-shaped cube, and the noise reduction sub-cavity is also a block-shaped cube.

[0021] The range hood comprises a multi-cavity serial noise reduction component in any of the above technical solutions, wherein the multi-cavity serial noise reduction component is arranged at the connection between the air duct and the smoke collecting chamber, so that the mother sound absorbing board is at least partially facing the air duct.

[0022] Preferably, the multi-chamber serial noise reduction component is connected with the air guide plate of the air duct through the air duct connecting part, and is connected with the lighting boss on the smoke collecting chamber through the lighting connecting part.

[0023] In summary, the technical solution of the utility model has the following main beneficial effects:

[0024] Compared with the prior art, the multi-cavity series noise reduction component in the technical solution of the utility model achieves an optimized noise reduction effect through structural design;

[0025] Furthermore, by arranging the noise reduction component at the connection between the air duct and the smoke collecting chamber, the propagation of noise can be curbed from the key position of noise transmission, which can also improve the noise reduction effect.

[0026] Further or more detailed beneficial effects will be described in detail in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the cross-sectional structure of a range hood provided with a multi-chamber serially connected noise reduction element in an embodiment;

[0028] Figure 2 2. It is a schematic diagram of the structure of a multi-cavity series noise reduction component in an embodiment;

[0029] Figure 3 is a schematic structural diagram of a multi-cavity series noise reduction component in an embodiment from another angle;

[0030] Figure 4 Schematic diagram of the internal structure of a multi-cavity series noise reduction component in an embodiment;

[0031] Figure 5 Schematic diagram of the cross-sectional structure of the sub-cavity unit and its interior in the embodiment.

[0032] Reference numerals:

[0033] 1-noise reduction mother cavity, 1.1-mother sound absorption board, 1.11-first sound absorption hole, 1.2-air duct connection part, 1.3-lighting connection part;

[0034] 2-noise reduction sub-cavity, 2.1-sub-sound absorbing board, 2.11-second sound absorbing hole, 2.2-sub-cavity unit, 2.21-unit sound absorbing board, 2.22-sound absorbing baffle, 2.221-third sound absorbing hole;

[0035] 3- air duct, 3.1- air guide plate, 4- smoke collecting chamber, 4.1- lighting boss. DETAILED DESCRIPTION

[0036] The present invention is further explained with reference to the following embodiments:

[0037] The core technical problem faced by the technical solution of the embodiment of the present application comes from the inventor's accurate understanding of the prior art. Therefore, how to improve the noise reduction effect of the range hood is a technical problem that the inventor urgently needs to solve.

[0038] It should be noted that the embodiments do not constitute a limitation on the protection scope of the claims of the utility model. According to the technical concepts provided / proven by the embodiments, all technical solutions that can be reasonably anticipated by technical personnel in the relevant technical field should be included in the protection scope of the claims of the utility model.

[0039] The embodiments are described in detail as follows:

[0040] Example :

[0041] Please refer to the instruction manual Figures 1 to 3 The range hood has a multi-cavity serial noise reduction component at the connection between the air duct 3 and the smoke collecting chamber 4. The upper part of the multi-cavity serial noise reduction component is connected with the V-shaped air guide plate 3.1 through the V-shaped air duct connection part 1.2, and the lower part is connected with the lighting boss 4.1 on the smoke collecting chamber 4 through the groove-shaped lighting connection part 1.3;

[0042] Attached Figure 1 The arrow in the figure indicates the main transmission direction of the noise. In this embodiment, the noise reduction component is arranged at the connection between the air duct 3 and the smoke collecting chamber 4, so as to curb the propagation of the noise from the key position of the noise transmission, thereby improving the noise reduction effect.

[0043] Please refer to the instruction manual Figures 2 to 4 The multi-cavity serial noise reduction component mentioned in this embodiment includes a noise reduction mother cavity 1, the interior of the noise reduction mother cavity 1 is formed as an accommodating space, and four noise reduction sub-cavities 2 are arranged in the accommodating space;

[0044] A mother sound absorbing plate 1.1 is arranged on the noise reduction mother cavity 1 in the direction toward the air duct, and a plurality of first sound absorbing holes 1.11 are opened on the mother sound absorbing plate 1.1. The diameter of the first sound absorbing holes 1.11 is less than 1 mm, for example, it can be 0.9 / 0.8 / 0.7 / 0.6 / 0.5 mm, etc., to enhance the absorption effect of the noise in the medium and low frequency band (<1000 Hz);

[0045] The above-mentioned four noise reduction sub-cavities 2 are respectively provided with sub-sound absorbing panels 2.1. The sub-sound absorbing panels 2.1 of two noise reduction sub-cavities 2 are arranged horizontally, and the sub-sound absorbing panels 2.1 of the other two noise reduction sub-cavities 2 are arranged vertically, which can expand the noise capture range. A plurality of second sound absorbing holes 2.11 are opened on the sub-sound absorbing panel 2.1, and the diameter of the second sound absorbing hole 2.11 is also less than 1 mm, for example, it can be 0.9 / 0.8 / 0.7 / 0.6 / 0.5 mm, etc.

[0046] In the technical solution of this embodiment, for the sound-absorbing holes, after the sound waves are incident into the pores, they interact with the air molecules in the pores, causing reflection, scattering and absorption, which can reduce the propagation of noise; for the multi-level mother-child cavity structure, the sound waves are more likely to be reflected and scattered in the cavity, but not easy to propagate out. The sound waves are reflected in the noise reduction mother cavity 1 to produce the first attenuation, and are subjected to the second attenuation in the noise reduction sub-cavity 2, and are then consumed to the point of annihilation, in order to obtain an optimized noise reduction effect.

[0047] Please refer to the attached manual Figure 5In a preferred embodiment, the noise reduction sub-cavity 2 is composed of a plurality of cubic sub-cavity units 2.2, each of which is provided with a unit sound absorbing plate 2.21 constituting a sub-sound absorbing plate 2.1, and the unit sound absorbing plate 2.21 is provided with the above-mentioned second sound absorbing hole 2.11;

[0048] The technical solution of this embodiment can be adapted to noise reduction components of different specifications, and thus can be easily applied to various models of range hoods.

[0049] In a further preferred embodiment, a sound absorbing baffle 2.22 is provided in the sub-cavity unit 2.2 to separate the sub-cavity unit 2.2 into two cavities, and a third sound absorbing hole 2.221 is provided on the sound absorbing baffle 2.22. The diameter of the third sound absorbing hole 2.221 is also less than 1 mm, for example, it can be 0.9 / 0.8 / 0.7 / 0.6 / 0.5 mm, etc.;

[0050] In this embodiment, the levels of the noise reduction cavity are further refined to obtain a better noise reduction effect.

[0051] In a further preferred embodiment, the sound absorbing baffle 2.22 is obliquely arranged in the sub-cavity unit 2.2 so as to have a different orientation angle with the unit sound absorbing plate 2.21 to better capture the sound waves entering the sub-cavity unit 2.2.

[0052] The noise reduction mother cavity 1, the noise reduction sub-cavity 2 and the sub-cavity unit 2.2 mentioned in the above embodiments are usually made of metal or plastic materials, among which the material with elastic deformation characteristics is a more preferred material. Under the same structure, its sound absorption effect is better than that of rigid materials.

[0053] In the description of this specification, the description with reference to the terms "embodiment", "basic embodiment", "preferred embodiment", "other embodiments", "example", "specific example", 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 utility model. 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.

[0054] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. Multi-cavity series noise reduction component, characterized in that: Included are: A noise reduction mother cavity (1) forms an accommodating space, wherein a mother sound absorption plate (1.1) is provided on the noise reduction mother cavity (1), and a plurality of first sound absorption holes (1.11) are provided on the mother sound absorption plate (1.1); At least one noise reduction sub-cavity (2) is arranged in the accommodating space, a sub-sound absorption plate (2.1) is arranged on the noise reduction sub-cavity (2), and a plurality of second sound absorption holes (2.11) are opened on the sub-sound absorption plate (2.1); The noise reduction sub-cavity (2) is composed of a plurality of sub-cavity units (2.2) combined; Each of the sub-cavity units (2.2) is provided with a unit sound absorbing plate (2.21) constituting the sub-sound absorbing plate (2.1), and the unit sound absorbing plate (2.21) is provided with the second sound absorbing hole (2.11); A sound absorbing baffle (2.22) is provided in the sub-cavity unit (2.2) to divide the sub-cavity unit (2.2) into at least two cavities, and a third sound absorbing hole (2.221) is provided on the sound absorbing baffle (2.22).

2. The multi-cavity serial noise reduction component according to claim 1, characterized in that: The sound absorbing baffle plate (2.22) and the unit sound absorbing plate (2.21) have different orientation angles.

3. The multi-cavity serial noise reduction component according to claim 1, characterized in that: The accommodating space comprises at least two noise reduction sub-cavities (2), forming at least two sub-sound absorbing panels (2.1) facing in different directions.

4. The multi-cavity serial noise reduction component according to claim 1, characterized in that: The apertures of the first sound absorption hole (1.11), the second sound absorption hole (2.11) and the third sound absorption hole (2.221) are all less than 1 mm.

5. The multi-cavity serial noise reduction component according to claim 1, characterized in that: The sub-cavity unit (2.2) is a block-shaped cube, and the noise reduction sub-cavity (2) is also a block-shaped cube.

6. A range hood, characterized in that: The multi-cavity serial noise reduction component comprises the multi-cavity serial noise reduction component as claimed in any one of claims 1 to 5, wherein the multi-cavity serial noise reduction component is arranged at the connection between the air duct (3) and the smoke collecting chamber (4), so that the mother sound absorbing board (1.1) is at least partially oriented toward the air duct (3).

7. The range hood according to claim 6, characterized in that: The multi-chamber serial noise reduction component is connected to the air guide plate (3.1) of the air duct (3) through the air duct connection part (1.2), and is connected to the lighting boss (4.1) on the smoke collecting chamber (4) through the lighting connection part (1.3).

Images