Range hood noise reduction structure and range hood

Abstract

The utility model provides a range hood noise reduction structure and a range hood, the range hood noise reduction structure comprises an exhaust fume collecting hood shell, and the exhaust fume collecting hood shell is provided with an exhaust fume collecting port and a rear plate which are opposite to each other; the side, facing the smoke gathering opening, of the rear plate is provided with a sound absorption plate, the sound absorption plate is obliquely arranged, a sound absorption cavity is formed between the sound absorption plate and the rear plate, and the section of the sound absorption cavity is gradually increased from top to bottom. According to the noise reduction structure of the range hood and the range hood provided by the utility model, the sound absorption frequency band can be widened, and the noise reduction effect is 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 structure and a range hood. Background Art

[0002] Range hood noise reduction is an important performance parameter optimization item. Existing noise reduction structures 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 structure, 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 structure, 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 structure comprises a smoke collecting hood shell, wherein the smoke collecting hood shell is provided with a smoke collecting port and a rear plate opposite to each other; a sound absorbing panel is provided on the side of the rear plate facing the smoke collecting port, the sound absorbing panel is arranged obliquely so that a sound absorbing cavity is formed between the sound absorbing panel and the rear plate, and the cross-section of the sound absorbing cavity gradually increases from top to bottom.

[0008] According to an embodiment of the present utility model, the sound absorbing panel has a curved surface that is recessed toward the rear panel.

[0009] According to an embodiment of the present utility model, a guide rib is provided on a side of the sound absorbing board facing the smoke collecting port, and the guide rib is arranged along the height direction of the sound absorbing board.

[0010] According to an embodiment of the present utility model, the guide rib has a curved surface that is recessed toward the rear plate, and the curvature of the curved surface of the guide rib is smaller than the curvature of the curved surface of the sound absorbing panel.

[0011] According to one embodiment of the present invention, the sound absorbing panel is a perforated panel.

[0012] According to one embodiment of the present invention, the perforation rate of the perforated plate is 18%-20%.

[0013] According to an embodiment of the present utility model, an angle of 10-18° is formed between the sound absorbing plate and the rear plate, and a width of the sound absorbing cavity is 0-40 mm.

[0014] According to one embodiment of the utility model, a mounting fold is provided at the top of the sound absorbing board, 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 sound absorbing board 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 vertical fold of the mounting fold is fixedly connected to the rear panel.

[0015] According to one embodiment of the utility model, sound-absorbing cotton is provided on the side of the sound-absorbing panel facing the rear plate.

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

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

[0018] 1) The noise reduction structure of the range hood provided by the embodiment of the utility model, by arranging a sound-absorbing panel inclined at a certain angle on the side of the rear panel, forms a sound-absorbing cavity with a gradually varying distance from the rear panel, thereby obtaining different resonance frequencies, widening the sound-absorbing frequency band, and improving the noise reduction effect. At the same time, since the sound-absorbing panel is arranged on the front side of the rear panel, the strength of the rear panel of the smoke hood shell is enhanced.

[0019] 2) The noise reduction structure of the range hood provided by the embodiment of the utility model has a sound absorbing plate with a curved surface that is recessed toward the rear plate, which can increase the air intake area at the rear of the oil screen, improve the smoke extraction effect, and improve the performance of the entire range hood.

[0020] 3) In the noise reduction structure of the range hood provided by the embodiment of the utility model, a guide rib with a curved surface is provided on the side of the sound absorbing board facing the smoke collecting port, and the curvature of the curved surface of the guide rib is smaller than the curvature of the curved surface of the sound absorbing board, so that the airflow velocity flowing through the surface of the sound absorbing board can be greater than the airflow velocity flowing through the guide rib, thereby realizing the separation and guidance of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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:

[0022] Figure 1 A schematic diagram of the appearance of a range hood noise reduction structure provided by an embodiment of the utility model;

[0023] Figure 2A schematic diagram of the appearance of the range hood noise reduction structure provided by an embodiment of the utility model from another angle;

[0024] Figure 3 A schematic diagram of the structure of the range hood noise reduction structure provided by an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the structure of the sound absorbing plate of the range hood noise reduction structure provided by the embodiment of the utility model;

[0026] Figure 5 A schematic diagram of the installation structure of the sound absorbing panel of the range hood noise reduction structure provided in an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1. Smoke hood shell; 11. Smoke outlet; 12. Back panel; 13. Door panel; 2. Sound-absorbing panel; 21. Installation folding edge; 3. Sound-absorbing cavity; 4. Guide ribs; 5. Sound-absorbing cotton. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] like Figure 1-Figure 3 As shown, the embodiment of the utility model provides a range hood noise reduction structure, including a smoke hood housing 1, the smoke hood housing 1 is provided with a smoke collecting port 11 and a rear plate 12 opposite to each other. The structure of the smoke hood housing 1 is prior art and will not be described in detail. A sound absorbing plate 2 is provided on the side of the rear plate 12 facing the smoke collecting port 11, the sound absorbing plate 2 is tilted, so that a sound absorbing cavity 3 is formed between the sound absorbing plate 2 and the rear plate 12, and the cross section of the sound absorbing cavity 3 gradually increases from top to bottom.

[0032] 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 noise reduction structure of the range hood provided by the embodiment of the utility model, by arranging the sound-absorbing panel 2 inclined at a certain angle on the side of the rear plate 12, and forming a sound-absorbing cavity 3 with a gradually changing distance between the rear plate 12, thereby obtaining different resonance frequencies, widening the sound absorption frequency band, and improving the noise reduction effect. At the same time, since the sound-absorbing panel 2 is arranged on the front side of the rear plate 12, the strength of the rear plate 12 of the smoke hood shell 1 is enhanced.

[0033] like Figure 4 As shown, in a preferred embodiment of the utility model, the sound absorbing board 2 has a curved surface that is concave toward the rear plate 12, that is, the cross section of the sound absorbing board 2 is in an arc shape. Compared with a sound absorbing board with a curvature of 0 (i.e., a flat plate), the air inlet area behind the oil screen can be increased, the smoking effect can be improved, and the performance of the whole machine can be improved.

[0034] In one embodiment of the utility model, the sound absorbing board 2 is provided with a guide rib 4 on the side facing the smoke collecting port 11, and the guide rib 4 is arranged along the height direction of the sound absorbing board 2 to separate and guide the inhaled airflow. Preferably, the guide rib 4 has a curved surface that is concave toward the rear plate 12, and the curvature of the curved surface of the guide rib 4 is smaller than the curvature of the curved surface of the sound absorbing board 2. The curvature of the curved surface of the guide rib 4 is smaller than the curvature of the curved surface of the sound absorbing board 2. According to the Bernoulli principle, the airflow velocity flowing through the board surface of the sound absorbing board 2 can be made greater than the airflow velocity flowing through the guide rib 4, thereby achieving separation and guidance of the airflow.

[0035] Specifically, the sound absorbing plate 2 is a perforated plate, and the perforation rate of the perforated plate is 18% to 20%. Within this range, a better noise reduction effect can be guaranteed.

[0036] Furthermore, the sound absorbing board 2 and the rear plate 12 form an angle of 10-18 degrees, the width of the sound absorbing cavity 3 (i.e., the distance from the sound absorbing board 2 to the rear plate 12) is 0-40 mm, and the resonant sound absorption frequency band width becomes wider as the width of the sound absorbing cavity 3 increases.

[0037] like Figure 3 As shown, in order to further improve the sound absorption and noise reduction effect, the sound absorbing board 2 is provided with sound absorbing cotton 5, such as melamine cotton, on the side facing the rear plate 12.

[0038] like Figure 4 , Figure 5 As shown, in order to facilitate the installation and fixation of the sound absorbing board 2, a mounting fold 21 is provided on the top of the sound absorbing board 2. Specifically, the mounting fold 21 includes a transverse fold, a vertical fold and an inclined fold connected in sequence. The transverse fold is connected to the top of the sound absorbing board 2 and extends toward the rear panel 12. The vertical fold is connected to the end of the transverse fold and extends upward. 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 21 is fixedly connected to the rear panel 12. In practice, the vertical fold of the mounting fold 21 is fixed between the rear panel 12 and the door panel 13 of the smoke hood housing 1, for example, by bolts. During installation, first install the sound absorbing panel assembly (sound absorbing panel 2 and sound absorbing cotton 5) on the smoke hood housing 1, and fix it to the back panel 12 by screws; place the vertical fold of the installation fold 21 of the sound absorbing panel 2 between the door panel 13 and the back panel 12, and finally fix the back panel 12, the sound absorbing panel 2 and the door panel 13 by screws. Due to the strengthening effect of the sound absorbing panel 2, the connection strength between the back panel 12 and the door panel 13 is increased, ensuring that the back panel does not deform during transportation.

[0039] The utility model also provides a range hood, comprising the range hood noise reduction structure mentioned above.

[0040] 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 structure, characterized in that: The invention comprises a smoke hood shell (1), wherein the smoke hood shell (1) is provided with a smoke collecting port (11) and a rear plate (12) opposite to each other; a sound absorbing plate (2) is provided on the side of the rear plate (12) facing the smoke collecting port (11); the sound absorbing plate (2) is arranged at an angle so that a sound absorbing cavity (3) is formed between the sound absorbing plate (2) and the rear plate (12); and the cross section of the sound absorbing cavity (3) gradually increases from top to bottom.

2. The range hood noise reduction structure according to claim 1, characterized in that: The sound absorbing panel (2) has a curved surface that is recessed toward the rear panel (12).

3. The range hood noise reduction structure according to claim 2, characterized in that: A guide rib (4) is provided on the side of the sound absorbing plate (2) facing the smoke collecting port (11), and the guide rib (4) is arranged along the height direction of the sound absorbing plate (2).

4. The range hood noise reduction structure according to claim 3, characterized in that: The guide rib (4) has a curved surface that is recessed in the direction of the rear plate (12), and the curvature of the curved surface of the guide rib (4) is smaller than the curvature of the curved surface of the sound absorbing plate (2).

5. The range hood noise reduction structure according to any one of claims 1 to 4, characterized in that: The sound absorbing plate (2) is a perforated plate.

6. The range hood noise reduction structure according to claim 5, characterized in that: The perforation rate of the perforated plate is 18%-20%.

7. The range hood noise reduction structure according to any one of claims 1 to 4, characterized in that: An angle of 10-18° is formed between the sound absorbing plate (2) and the rear plate (12), and a width of the sound absorbing cavity (3) is 0-40 mm.

8. The range hood noise reduction structure according to any one of claims 1 to 4, characterized in that: The top of the sound absorbing board (2) is provided with a mounting fold (21), and the mounting fold (21) comprises a transverse fold, a vertical fold and an inclined fold connected in sequence; the transverse fold is connected to the top of the sound absorbing board (2) and extends in the direction of the rear plate (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 plate (12); the vertical fold of the mounting fold (21) is fixedly connected to the rear plate (12).

9. The range hood noise reduction structure according to any one of claims 1 to 4, characterized in that: A side of the sound absorbing panel (2) facing the rear panel (12) is provided with sound absorbing cotton (5).

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

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