Range hood noise reduction assembly and range hood

Abstract

The utility model provides a noise reduction assembly of a range hood and the range hood. The noise reduction assembly of the range hood comprises an exhaust fume collecting hood shell and an air duct communicated with the top of the exhaust fume collecting hood shell, the exhaust fume collecting hood shell is provided with an exhaust fume collecting opening and a rear plate which are opposite, and a door plate is arranged on the side face, corresponding to the rear plate, of the air duct. The side, facing the smoke gathering opening, of the rear plate is provided with a first sound absorption plate, the first sound absorption plate is obliquely arranged, a sound absorption cavity is formed between the first sound absorption plate and the rear plate, and the section of the sound absorption cavity is gradually increased from top to bottom. A second sound absorption plate is arranged on the inner side of the door plate. According to the range hood noise reduction assembly and the range hood, the sound absorption frequency band can be widened, and the noise reduction effect can be improved.

Description

Technical Field

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

[0002] Range hood noise reduction is an important performance parameter optimization item. Existing noise reduction components are arranged in various positions of the range hood, such as around the box, around the air outlet, and on the side of the air inlet. Existing range hood noise reduction structures generally use a combination of perforated plates and porous sound-absorbing materials, which are attached to the parts that need noise reduction. However, the noise reduction effect of this noise reduction structure is still not ideal, which affects the customer experience.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The utility model aims to provide a range hood noise reduction component, which can widen the sound absorption frequency band and improve the noise reduction effect.

[0005] Another object of the utility model is to provide a range hood, which includes the above-mentioned range hood noise reduction component, which can widen the sound absorption frequency band and improve the noise reduction effect.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A range hood noise reduction component comprises a smoke hood shell and an air duct connected to the top of the smoke hood shell; the smoke hood shell is provided with a smoke collecting port and a rear plate opposite to each other, and a door plate is provided on the side of the air duct corresponding to the rear plate; a first sound absorbing panel is provided on the side of the rear plate facing the smoke collecting port, the first sound absorbing panel is tilted so that a sound absorbing cavity is formed between the first sound absorbing panel and the rear plate, and the cross-section of the sound absorbing cavity gradually increases from top to bottom; a second sound absorbing panel is provided on the inner side of the door plate.

[0008] According to an embodiment of the present invention, the second sound absorbing panel includes a first panel and a second panel, the first panel is arranged on the inner side of the door panel, and the second panel extends upwardly obliquely from the top of the first panel.

[0009] According to an embodiment of the utility model, a transition surface obliquely extending toward the door panel is provided at the bottom of the first panel.

[0010] According to one embodiment of the present invention, a mounting fold is provided at the top of the first sound absorbing panel, and the mounting fold includes a transverse fold, a vertical fold and an inclined fold connected in sequence; the transverse fold is connected to the top of the first sound absorbing panel and extends toward the rear panel, the vertical fold is connected to the end of the transverse fold and extends upward, and the inclined fold is connected to the end of the vertical fold and extends obliquely upward toward the rear panel; the mounting fold is fixed between the bottom of the door panel and the top of the rear panel.

[0011] According to one embodiment of the utility model, a water inlet maintenance port is provided at the bottom of the first sound absorbing panel, and a water pipe notch is provided at one side of the top of the first sound absorbing panel.

[0012] According to an embodiment of the present invention, both the first sound absorbing panel and the second sound absorbing panel are perforated panels.

[0013] According to one embodiment of the present invention, the perforation rate of the perforated plate is 18%-20%.

[0014] According to an embodiment of the present utility model, an angle of 10-18° is formed between the first sound absorbing panel and the rear panel, and a width of the sound absorbing cavity is 0-40 mm.

[0015] According to an embodiment of the utility model, baffles are provided on both sides of the first sound-absorbing board extending backwards, sound-absorbing cotton is provided between the two baffles, and the baffles are provided with sound-absorbing cotton strips.

[0016] The utility model also provides a range hood, comprising the range hood noise reduction component mentioned above.

[0017] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0018] The range hood noise reduction assembly and the range hood provided by the embodiment of the utility model, by arranging a first sound-absorbing panel inclined at a certain angle on the side of the rear panel, a sound-absorbing cavity with a gradually changing distance is formed between the rear panel and the first sound-absorbing panel, thereby obtaining different resonance frequencies, widening the sound-absorbing frequency band, and improving the noise reduction effect. In addition, the utility model arranges a second sound-absorbing panel on the inner side of the door panel, further widening the sound-absorbing frequency band, improving the noise reduction effect, and rectifying the airflow to reduce airflow loss. At the same time, since the first sound-absorbing panel is arranged on the front side of the rear panel, the strength of the rear panel of the smoke hood housing is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0020] Figure 1 A schematic diagram of the appearance of a range hood noise reduction assembly provided by an embodiment of the utility model;

[0021] Figure 2 A schematic diagram showing the structure of a side wall of a portion of the air duct of a range hood noise reduction assembly provided by an embodiment of the utility model;

[0022] Figure 3 A cross-sectional schematic diagram of a range hood noise reduction assembly provided by an embodiment of the utility model;

[0023] Figure 4 A schematic structural diagram of a first sound absorbing plate of a range hood noise reduction assembly provided in an embodiment of the utility model;

[0024] Figure 5 A schematic structural diagram of a second sound absorbing plate of a range hood noise reduction assembly provided by an embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the installation structure of the first sound absorbing plate of the range hood noise reduction assembly provided in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Smoke hood shell; 11. Smoke collecting port; 12. Back panel; 2. Air duct; 21. Door panel; 3. First sound-absorbing panel; 31. Sound-absorbing cavity; 32. Installation folded edge; 33. Water inlet maintenance port; 34. Water pipe notch; 35. Baffle; 36. Sound-absorbing cotton strip; 4. Second sound-absorbing panel; 41. First panel; 42. Second panel; 43. Transition surface; 5. Sound-absorbing cotton. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0029] In the description of the present invention, "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. The directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense, for example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] like Figure 1-Figure 3 As shown, an embodiment of the utility model provides a range hood noise reduction component, including a smoke hood housing 1 and an air duct 2 connected to the top of the smoke hood housing 1. The smoke hood housing 1 is provided with a relative smoke collecting port 11 and a rear panel 12, and a door panel 21 is provided on the side of the air duct 2 corresponding to the rear panel 12. The structure of the smoke hood housing 1 and the air duct 2 is prior art and will not be described in detail. A first sound absorbing panel 3 is provided on the side of the rear panel 12 facing the smoke collecting port 11, and the first sound absorbing panel 3 is tilted so that a sound absorbing cavity 31 is formed between the first sound absorbing panel 3 and the rear panel 12, and the cross-section of the sound absorbing cavity 31 gradually increases from top to bottom. A second sound absorbing panel 4 is provided on the inner side of the door panel 21, corresponding to the position of the fan in the air duct 2.

[0031] The existing sound-absorbing panels are arranged along the shape of the inner wall of the smoke hood shell, the sound absorption frequency band is narrow, and the noise reduction cavity is generally a fixed value. The range hood noise reduction assembly provided by the embodiment of the utility model obtains different resonance frequencies, widens the sound absorption frequency band, and improves the noise reduction effect by arranging a first sound-absorbing panel 3 inclined at a certain angle on the side of the rear panel 12, and forming a sound absorption cavity 31 with a gradually varying distance between the rear panel 12. In addition, the embodiment of the utility model arranges a second sound-absorbing panel 4 on the inner side of the door panel 21, further widens the sound absorption frequency band, improves the noise reduction effect, and at the same time rectifies the airflow to reduce airflow losses. At the same time, since the first sound-absorbing panel 3 is arranged on the front side of the rear panel 12, the strength of the rear panel 12 of the smoke hood shell 1 is enhanced.

[0032] like Figure 5As shown, in one embodiment of the present invention, the second sound absorbing panel 4 includes a first panel 41 and a second panel 42, wherein the first panel 41 is disposed inside the door panel 21, and the second panel 42 extends upwardly from the top of the first panel 41 in an inclined manner, so that the second sound absorbing panel 4 is V-shaped. Furthermore, a transition surface 43 extending obliquely toward the door panel 21 is disposed at the bottom of the first panel 41 to guide the airflow.

[0033] Specifically, the first sound absorbing plate 3 and the second sound absorbing plate 4 are both perforated plates, and the perforation rate of the perforated plates is 18%-20%. Within this range, a better noise reduction effect can be guaranteed.

[0034] Furthermore, an angle of 10-18° is formed between the first sound absorbing panel 3 and the rear panel 12 , the width of the sound absorbing cavity 31 (i.e., the distance between the first sound absorbing panel 3 and the rear panel 12 ) is 0-40 mm, and the width of the resonance sound absorption frequency band becomes wider as the width of the sound absorbing cavity 31 increases.

[0035] like Figure 4 , Figure 6 As shown, in one embodiment of the utility model, the top of the first sound absorbing panel 3 is provided with a mounting fold 32 for mounting the first sound absorbing panel 3. Specifically, the mounting fold 32 includes a transverse fold, a vertical fold and an inclined fold connected in sequence. The transverse fold is connected to the top of the first sound absorbing panel 3 and extends toward the rear panel 12, the vertical fold is connected to the end of the transverse fold and extends upward, and the inclined fold is connected to the end of the vertical fold and extends obliquely upward toward the rear panel 12. The vertical fold of the mounting fold 32 is fixedly arranged between the bottom of the door panel 21 and the top of the rear panel 12. The mounting fold 32 also plays a role in strengthening the strength of the surrounding structure. During installation, the first sound absorbing panel 3 is first installed on the rear panel 12 of the smoke hood housing 1, and fixed to the rear panel 12 by screws, and the second sound absorbing panel 4 is installed on the door panel 21; the vertical fold of the installation fold 32 on the top of the first sound absorbing panel 3 is located between the door panel 21 and the rear panel 12, and finally the rear panel 12, the first sound absorbing panel 3 and the door panel 21 are fixed by screws. Due to the reinforcing effect of the first sound absorbing panel 3, the connection strength between the rear panel 12 and the door panel 21 is increased, ensuring that the rear panel does not deform during transportation.

[0036] like Figure 4 As shown, in one embodiment of the present utility model, a water inlet maintenance port 33 is provided at the bottom of the first sound absorbing panel 3 , and a water pipe notch 34 is provided at one side of the top of the first sound absorbing panel 3 .

[0037] like Figure 3 , Figure 4 As shown, in order to further improve the sound absorption and noise reduction effect, baffles 35 are extended backward on both sides of the first sound absorbing board 3, and sound absorbing cotton 5 is arranged between the two baffles 35, and the baffle 35 is provided with a sound absorbing cotton strip 36.

[0038] The utility model also provides a range hood, comprising the range hood noise reduction component mentioned above.

[0039] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A range hood noise reduction component, characterized in that: The invention comprises a smoke hood shell (1) and an air duct (2) connected to the top of the smoke hood shell (1); the smoke hood shell (1) is provided with a smoke collecting port (11) and a rear plate (12) opposite to each other, and a door plate (21) is provided on the side of the air duct (2) corresponding to the rear plate (12); a first sound absorbing plate (3) is provided on the side of the rear plate (12) facing the smoke collecting port (11), and the first sound absorbing plate (3) is arranged obliquely so that a sound absorbing cavity (31) is formed between the first sound absorbing plate (3) and the rear plate (12), and the cross section of the sound absorbing cavity (31) gradually increases from top to bottom; a second sound absorbing plate (4) is provided on the inner side of the door plate (21).

2. The range hood noise reduction assembly according to claim 1, characterized in that: The second sound absorbing panel (4) comprises a first panel (41) and a second panel (42), wherein the first panel (41) is arranged on the inner side of the door panel (21), and the second panel (42) extends upwardly obliquely from the top of the first panel (41).

3. The range hood noise reduction assembly according to claim 2, characterized in that: A transition surface (43) extending obliquely toward the door panel (21) is provided at the bottom of the first panel (41).

4. The range hood noise reduction assembly according to any one of claims 1 to 3, characterized in that: The top of the first sound absorbing panel (3) is provided with a mounting fold (32), and the mounting fold (32) comprises a transverse fold, a vertical fold and an inclined fold connected in sequence; the transverse fold is connected to the top of the first sound absorbing panel (3) and extends in the direction of the rear panel (12), the vertical fold is connected to the end of the transverse fold and extends upward, and the inclined fold is connected to the end of the vertical fold and extends obliquely upward in the direction of the rear panel (12); the vertical fold of the mounting fold (32) is fixedly arranged between the bottom of the door panel (21) and the top of the rear panel (12).

5. The range hood noise reduction assembly according to any one of claims 1 to 3, characterized in that: A water inlet maintenance port (33) is provided at the bottom of the first sound absorbing panel (3), and a water pipe notch (34) is provided at one side of the top of the first sound absorbing panel (3).

6. The range hood noise reduction assembly according to any one of claims 1 to 3, characterized in that: The first sound absorbing panel (3) and the second sound absorbing panel (4) are both perforated panels.

7. The range hood noise reduction assembly according to claim 6, characterized in that: The perforation rate of the perforated plate is 18%-20%.

8. The range hood noise reduction assembly according to any one of claims 1 to 3, characterized in that: An included angle of 10-18° is formed between the first sound absorbing panel (3) and the rear panel (12), and a width of the sound absorbing cavity (31) is 0-40 mm.

9. The range hood noise reduction assembly according to any one of claims 1 to 3, characterized in that: Baffles (35) are provided on both sides of the first sound-absorbing plate (3) extending backwards, sound-absorbing cotton (5) is provided between the two baffles (35), and the baffles (35) are provided with sound-absorbing cotton strips (36).

10. A range hood, characterized in that: It comprises a range hood noise reduction component according to any one of claims 1 to 9.

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