Sound absorption box assembly and range hood

Abstract

The sound absorption box assembly comprises a sound absorption box support and sound absorption cotton installed on the sound absorption box support, the sound absorption box support is provided with a sound absorption grating, the sound absorption cotton covers the outer side of the sound absorption grating, a fixing plate is arranged on the outer side of the sound absorption cotton, and the fixing plate is arranged on the outer side of the sound absorption cotton. And the sound-absorbing cotton is clamped and fixed between the sound-absorbing grating and the fixing plate. The sound-absorbing box assembly has the advantages that the sound-absorbing box support of the sound-absorbing box assembly is provided with the sound-absorbing grating, the sound-absorbing cotton covers the outer side of the sound-absorbing grating, the sound-absorbing cotton is clamped and fixed between the sound-absorbing grating and the fixing plate, sound penetrates through the sound-absorbing cotton through the grating and is absorbed by the sound-absorbing cotton, and the noise reduction effect is achieved; after the sound absorption box assembly is installed in the air inlet channel of the range hood, the noise of the air inlet channel can be effectively reduced, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to a noise reduction device for a range hood, in particular to a sound absorption box assembly and a range hood equipped with the sound absorption box assembly. Background Art

[0002] When the range hood is working, it will generate noise, and when the noise is too high, it will seriously affect the user experience. The noise reduction measures generally include reducing the fan speed, optimizing the fan air duct, using sound absorption cotton and other methods. Among them, the noise reduction scheme using sound absorption cotton does not affect the fan capacity and has little impact on the fan system. It is a more commonly used noise reduction measure. However, the layout position and structure of the sound absorption cotton also affect the noise reduction effect. To reduce noise using sound absorption materials, a sound absorption box is needed to fix the sound absorption materials, and the structure of the sound absorption box has a great impact on the noise reduction effect of the sound absorption materials. For example, the "Range Hood with Replaceable Sound Absorption Cotton" disclosed in the Chinese invention patent with the patent number 201811214418.X (the authorized announcement number is CN111076233B). A storage box is detachably provided on the back of the smoke collecting hood of the range hood near the air outlet port. The storage box is located inside the hood shell and under the fan. The storage box is provided with sound absorption cotton. A hanging plate is provided on the inner side of the hood shell. The fan is hung on the hanging plate. A net plate that can cover the sound absorption cotton is provided at the lower end of the hanging plate. The sound absorption cotton can be easily detached and installed with the storage box. On the basis of ensuring sound absorption and noise reduction, it is more convenient for users to clean and maintain the range hood, ensuring the stable operation of the range hood and improving the user experience. In addition, the sound absorption cotton does not directly contact the flue gas on the front side, reducing the possibility of adhering to oil, which is beneficial to long-term stable operation. Summary of the Utility Model

[0003] The first technical problem to be solved by the present utility model is to provide a sound absorption box assembly with novel structure and good noise reduction effect in view of the above-mentioned prior art status.

[0004] The second technical problem to be solved by the present utility model is to provide a range hood that can reduce the noise of the air inlet passage in view of the above-mentioned prior art status.

[0005] The technical solution adopted by the present utility model to solve the above first technical problem is: a sound absorption box assembly, including a sound absorption box bracket and a sound absorption cotton installed on the sound absorption box bracket, characterized in that: the sound absorption box bracket has a sound absorption grille, the sound absorption cotton covers the outside of the sound absorption grille, and a fixing plate is provided outside the sound absorption cotton, and the sound absorption cotton is clamped between the sound absorption grille and the fixing plate.

[0006] Preferably, the sound-absorbing grille has sides and bent portions extending by bending from the edges of the sides to the same side. The sound-absorbing cotton includes a first sound-absorbing cotton provided on the back of the side and a second sound-absorbing cotton provided on the back of the bent portion. The fixing plate includes a first pressing plate pressing on the first sound-absorbing cotton and a second pressing plate pressing on the second sound-absorbing cotton. With such an arrangement, the noise reduction effect of the sound-absorbing box assembly can be further improved.

[0007] More preferably, the bent portion is arched.

[0008] In order to fix the back plate to the back of the sound-absorbing grille, screw holes are provided on the back of the sound-absorbing grille. Avoidance holes corresponding to the screw holes are formed in the first sound-absorbing cotton. After the screws pass through the avoidance holes, they are fixed in the screw holes to fix the back plate to the back of the sound-absorbing grille.

[0009] In order to position the installation of the second sound-absorbing cotton, blocking portions are formed at both ends of the bent portion, and both ends of the second sound-absorbing cotton respectively abut against the blocking portions at the corresponding ends.

[0010] In order to further limit the installation of the second sound-absorbing cotton, the side of the bent portion has an upwardly bent upwardly turned portion.

[0011] The technical solution adopted by the present invention to solve the above second technical problem is: an oil fume extractor, including a fan frame and an oil fume extraction fan provided inside the fan frame. An air inlet is provided at the bottom of the fan frame, and an air outlet is provided at the top of the fan frame. An air inlet passage communicating the air inlet with the air outlet is formed inside the fan frame. It is characterized in that: the sound-absorbing box assembly is installed in the air inlet passage.

[0012] In order to improve the noise reduction effect, the side of the sound-absorbing grille faces the fan air inlet of the oil fume extraction fan, and the bent portion of the sound-absorbing grille is provided above the fan air inlet.

[0013] In order to further improve the noise reduction effect, the side of the sound-absorbing grille is directly opposite to the fan air inlet, and the area of the side of the sound-absorbing grille is larger than the area of the fan air inlet.

[0014] More preferably, the first pressing plate is the back plate of the fan frame, and the second pressing plate is the top plate of the fan frame.

[0015] Compared with the prior art, the advantages of the present invention are: the sound-absorbing box support of the sound-absorbing box assembly has a sound-absorbing grille, the sound-absorbing cotton covers the outside of the sound-absorbing grille, the sound-absorbing cotton is clamped between the sound-absorbing grille and the fixing plate, and the sound passes through the grille to the sound-absorbing cotton and is absorbed by the sound-absorbing cotton, achieving a noise reduction effect. After the oil fume extractor installs the sound-absorbing box assembly in the air inlet passage, the noise of the air inlet passage can be effectively reduced, improving the user experience. Description of the Drawings

[0016] Figure 1 Schematic structural diagram of the sound absorption box assembly according to an embodiment of the present utility model;

[0017] Figure 2 is Figure 1 Schematic structural diagram of the sound absorption box assembly shown from another angle;

[0018] Figure 3 Schematic structural diagram of the sound absorption box bracket according to an embodiment of the present utility model;

[0019] Figure 4 is Figure 3 Schematic structural diagram of the sound absorption box bracket shown from another angle;

[0020] Figure 5 Schematic installation structure diagram of the sound absorption box assembly according to an embodiment of the present utility model;

[0021] Figure 6 Schematic structural diagram of the range hood according to an embodiment of the present utility model. Detailed implementation manners

[0022] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] As Figures 1 to 4 shown, the sound absorption box assembly of this embodiment includes a sound absorption box bracket 1 and a sound absorption cotton 2 installed on the sound absorption box bracket 1. The sound absorption box bracket 1 has a sound absorption grille 11. The sound absorption cotton 2 covers the outside of the sound absorption grille 11. A fixing plate is provided on the outside of the sound absorption cotton 2. The sound absorption cotton 2 is clamped between the sound absorption grille 11 and the fixing plate.

[0024] Specifically, the sound absorption grille 11 has a side portion 111 and a bent portion 112 that bends and extends from the edge of the side portion 111 to the same side. The bent portion 112 is arched. The sound absorption cotton 2 includes a first sound absorption cotton 21 and a second sound absorption cotton 22. The first sound absorption cotton 21 is provided on the back of the side portion 111, and the second sound absorption cotton 22 is provided on the back of the bent portion 112. The fixing plate includes a first pressing plate and a second pressing plate. The first pressing plate presses on the first sound absorption cotton 21 to fix it, and the second pressing plate presses on the second sound absorption cotton to fix it.

[0025] A screw hole 113 is provided on the back of the sound absorption grille 11. An avoidance hole 211 corresponding to the screw hole 113 is opened on the first sound absorption cotton 21. After the screw passes through the avoidance hole 211, it is fixed in the screw hole 113, thereby fixing the first pressing plate on the back of the sound absorption grille 11. Resistance portions 114 are formed at both ends of the bent portion 112. Both ends of the second sound absorption cotton 22 respectively abut against the resistance portions 114 at the corresponding ends, and the second sound absorption cotton 22 is limited by the resistance portions 114. In addition, an upwardly bent upward turning portion 115 is provided on the side of the bent portion 112, and the upward turning portion 115 further limits the second sound absorption cotton 22.

[0026] As Figure 5 and Figure 6 shown, the range hood of this embodiment includes a fan frame 3 and a smoke extraction fan 4 disposed inside the fan frame 3. An air inlet 31 is provided at the bottom of the fan frame 3, and an air outlet 32 is provided at the top of the fan frame 3. An air inlet passage 33 communicating the air inlet 31 and the air outlet 32 is formed inside the fan frame 3, and the sound absorption box assembly is installed in the air inlet passage 33. Specifically, the side portion 111 of the sound absorption grille 11 faces and is directly opposite to the fan air inlet 41 of the smoke extraction fan 4, the bent portion 112 of the sound absorption grille 11 is disposed above the fan air inlet 41, and moreover, the area of the side portion 111 of the sound absorption grille 11 is larger than the area of the fan air inlet 41. Thus, the front and top of the air inlet passage in front of the fan air inlet 41 are both covered by the sound absorption cotton, and the noise reduction effect is better. In this embodiment, the back plate 34 or the front plate of the fan frame constitutes the first pressing plate of the sound absorption box assembly, and the top plate 35 of the fan frame constitutes the second pressing plate of the sound absorption box assembly. When the range hood works, the sound passes through the sound absorption grille 11 to the sound absorption cotton and is absorbed by the sound absorption cotton, achieving a noise reduction effect and improving the user experience.

[0027] In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present utility model. However, these terms are used herein only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed by the present utility model can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

Claims

1. A sound absorbing box assembly, comprising a sound absorbing box bracket (1) and a sound absorbing cotton (2) mounted on the sound absorbing box bracket (1), characterized in that: The sound absorbing box bracket (1) comprises a sound absorbing grille (11), the sound absorbing cotton (2) covers the outer side of the sound absorbing grille (11), a fixing plate is arranged on the outer side of the sound absorbing cotton (2), the sound absorbing cotton (2) is clamped between the sound absorbing grille (11) and the fixing plate, the sound absorbing grille (11) comprises a side portion (111) and a bending portion (112) extending from the edge of the side portion (111) to the same side, the sound absorbing cotton (2) comprises a first sound absorbing cotton (21) arranged on the back side of the side portion (111) and a second sound absorbing cotton (22) arranged on the back side of the bending portion (112), and the fixing plate comprises a first pressing plate pressed on the first sound absorbing cotton (21) and a second pressing plate pressed on the second sound absorbing cotton (22).

2. The sound absorbing box assembly according to claim 1, characterized in that: The bent portion (112) is arched.

3. The sound absorbing box assembly according to claim 1, characterized in that: The back of the sound absorbing grille (11) is provided with a screw hole (113); the first sound absorbing cotton (21) is provided with an avoidance hole (211) corresponding to the screw hole (113); the screw passes through the avoidance hole (211) and is fixed on the screw hole (113) to fix the first pressing plate to the back of the sound absorbing grille (11).

4. The sound absorbing box assembly according to claim 1, characterized in that: The two ends of the bending portion (112) are formed with abutment portions (114), and the two ends of the second sound-absorbing cotton (22) respectively abut against the abutment portions (114) at the corresponding ends.

5. The sound absorbing box assembly according to claim 1, characterized in that: The side of the bent portion (112) has an upwardly bent upturned portion (115).

6. A range hood, comprising a fan frame (3) and a range hood fan (4) arranged inside the fan frame (3), wherein an air inlet (31) is arranged at the bottom of the fan frame (3), an air outlet (32) is arranged at the top of the fan frame (3), and an air inlet channel (33) connecting the air inlet (31) and the air outlet (32) is formed inside the fan frame (3), characterized in that: The sound absorbing box assembly according to any one of claims 1 to 5 is installed in the air inlet channel (33).

7. The range hood according to claim 6, characterized in that: The side portion (111) of the sound absorbing grille (11) faces the fan air inlet (41) of the range hood exhaust fan (4), and the bent portion (112) of the sound absorbing grille (11) is arranged above the fan air inlet (41).

8. The range hood according to claim 7, characterized in that: The side portion (111) of the sound absorbing grille (11) faces the fan air inlet (41), and the area of ​​the side portion (111) of the sound absorbing grille (11) is larger than the area of ​​the fan air inlet (41).

9. The range hood according to claim 6, characterized in that: The first pressing plate is a fan rack back plate (34), and the second pressing plate is a fan rack top plate (35).

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