A range hood with a noise reduction mute structure

Abstract

The utility model provides a range hood with noise reduction mute structure, and the front panel of volute is spaced from the front side of air cabinet and forms exhaust air duct, the rear side of exhaust air duct is communicated with the air inlet end of fan, the downside of exhaust air duct is communicated with the inner chamber of fume collecting cover, and the side plate of air cabinet is provided with cabinet sound insulation board in the front side and both sides, cabinet sound insulation board and the side plate of air cabinet surround and form cabinet sound insulation layer, the upside of fume collecting cover is provided with box sound insulation board, and box sound insulation board and the upper wall of fume collecting cover surround and form box sound insulation layer, and cabinet sound insulation layer and box sound insulation layer are embedded with sound insulation cotton, the utility model discloses, and the range hood forms exhaust air duct in the front side area of air cabinet, and the multi-block sound insulation structure of arrangement exhaust air duct area is aimed at, and effectively solves the industry difficult problem that noise and suction force are difficult to take into account when high power operation.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a range hood with a noise reduction and quiet operation structure. Background Technology

[0002] Existing range hoods typically consist of two main parts: a smoke collection hood at the bottom and a fan housing located above it. The fan housing contains a volute structure for mounting the fan, which generates negative pressure during operation to effectively capture and exhaust cooking fumes. However, the fan generates significant noise during operation due to high-speed rotation and aerodynamic disturbances, especially at higher operating power, where the noise level increases further, severely impacting the user experience and the comfort of the living environment.

[0003] Currently, to balance smoke extraction efficiency and noise control, most range hood products adopt a design strategy that compromises between fan power and noise level. This involves limiting the maximum speed or using a low-noise operating mode to reduce noise, but this also limits their smoke extraction performance under high load conditions. Therefore, how to effectively suppress noise while ensuring sufficient airflow has become a key issue in the design and optimization of range hoods. Against this backdrop, the development and integration of noise reduction structures specifically designed for the noise characteristics of range hoods has significant engineering application value and practical significance. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a range hood with a noise reduction and quiet operation structure.

[0005] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a range hood with a noise reduction and quiet structure, including a smoke collection hood, a fan cabinet disposed above the smoke collection hood, and a volute disposed inside the fan cabinet for installing a fan; the front panel of the volute and the front side of the fan cabinet form a smoke exhaust duct; the rear side of the smoke exhaust duct is connected to the air inlet of the fan, and the lower side of the smoke exhaust duct is connected to the inner cavity of the smoke collection hood; The fan cabinet has sound insulation panels on its front and side panels; the sound insulation panels and the side panels of the fan cabinet form a sound insulation layer; the upper side of the smoke hood has a box-type sound insulation panel, and the box-type sound insulation panel and the upper wall of the smoke hood form a box-type sound insulation layer; the sound insulation layer of the fan cabinet and the box-type sound insulation layer are inlaid with sound insulation cotton.

[0006] Optionally, the cabinet sound insulation panel and the box sound insulation panel are stamped sheet metal parts.

[0007] Optionally, the outer edges of the cabinet sound insulation panel and the box sound insulation panel are provided with a flange structure to form a flat box-shaped structure with an opening on at least one side, so as to clamp or slide the sound insulation cotton.

[0008] Optionally, the sound insulation panel of the enclosure has several mesh openings.

[0009] Optionally, the sound insulation layer of the enclosure has an anti-permeability coating applied to the downward-facing side of the sound insulation cotton.

[0010] Optionally, the front panel of the volute is tilted backward; the exhaust duct has a channel structure with a cross-section that gradually narrows from bottom to top.

[0011] The beneficial effects of this utility model are as follows: This range hood effectively solves the industry problem of balancing noise and suction power during high-power operation by forming a smoke exhaust duct in the front area of ​​the fan housing and arranging a multi-block sound insulation structure in the smoke exhaust duct area. Specifically, the cabinet sound insulation layer and the box sound insulation layer together constitute a composite sound insulation system. The sound insulation cotton filled inside can efficiently absorb and block the mid-to-high frequency aerodynamic noise and mechanical vibration noise generated during the operation of the fan. This structure effectively acoustically encapsulates the main noise generation area and propagation path, achieving dual noise reduction from both the noise source and propagation path. The independent design of the smoke exhaust duct ensures smooth airflow and avoids loss of air volume and air pressure due to the addition of noise reduction structures, ensuring strong smoke extraction and exhaust performance even at a high level of quietness.

[0012] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the range hood of this utility model; Figure 2 for Figure 1 Exploded view of a center-draft range hood; Figure 3 for Figure 1 A cross-sectional view of a central-range hood.

[0014] Explanation of key component symbols: 10. Smoke hood; 20. Air handling unit; 30. Fan; 40. Volute; 50. Smoke exhaust duct; 60. Cabinet sound insulation board; 70. Box sound insulation board; 80. Sound insulation cotton. Detailed Implementation

[0015] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0016] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0019] Example Reference Figures 1 to 3 The present invention proposes a range hood with a noise reduction and quiet operation structure, including a smoke collection hood 10, a fan housing 20 disposed above the smoke collection hood 10, and a volute 40 disposed inside the fan housing 20 for installing a fan 30; the front panel of the volute 40 and the front side of the fan housing 20 form a smoke exhaust duct 50; the rear side of the smoke exhaust duct 50 is connected to the air inlet of the fan 30, and the lower side of the smoke exhaust duct 50 is connected to the inner cavity of the smoke collection hood 10; The fan cabinet 20 has cabinet sound insulation panels 60 on its front and side panels; the cabinet sound insulation panels 60 and the side panels of the fan cabinet 20 form a cabinet sound insulation layer; the upper side of the smoke hood 10 has a box sound insulation panel 70, the box sound insulation panel 70 and the upper wall of the smoke hood 10 form a box sound insulation layer; the cabinet sound insulation layer and the box sound insulation layer are inlaid with sound insulation cotton 80.

[0020] In this invention, the range hood effectively solves the industry problem of balancing noise and suction power during high-power operation by forming an exhaust duct 50 in the front area of ​​the fan housing 20 and arranging a multi-block sound insulation structure in the exhaust duct 50 area. Specifically, the cabinet sound insulation layer and the box sound insulation layer together constitute a composite sound insulation system, and the sound insulation cotton 80 filled inside can efficiently absorb and block the mid-to-high frequency aerodynamic noise and mechanical vibration noise generated by the fan 30 during operation. This structure effectively acoustically encapsulates the main noise generation area and propagation path, achieving dual noise reduction from both the noise source and propagation path. The independent design of the exhaust duct 50 ensures smooth airflow and avoids loss of air volume and air pressure due to the addition of noise reduction structures, ensuring strong smoke extraction and exhaust performance even at a high level of quietness.

[0021] In this embodiment, the cabinet sound insulation panel 60 and the box sound insulation panel 70 are stamped sheet metal parts. Using stamped sheet metal parts gives the sound insulation panels advantages such as high production efficiency, low cost, and good consistency, making them very suitable for large-scale industrial production. At the same time, the stamping process ensures that the sound insulation panels have high structural strength and dimensional accuracy, thereby ensuring that they can firmly and smoothly form a sealed sound insulation cavity with the side panels / upper walls of the fan cabinet 20 and the smoke hood 10, preventing additional vibration or noise caused by structural deformation and ensuring the stability and reliability of the sound insulation effect.

[0022] Specifically, the outer edges of the cabinet sound insulation panel 60 and the box sound insulation panel 70 are provided with a flanged structure, forming a flat box-like structure with an opening on at least one side, for the mounting or sliding of the sound insulation cotton 80. By setting the flanged structure, the sound insulation panel itself is shaped into a prefabricated, regular "box-like" structure. This design firstly greatly facilitates the installation of the sound insulation cotton 80, which can be pre-cut to specific sizes and then inserted or pushed into the box like a "drawer," simplifying the assembly process and improving production efficiency and maintainability. Secondly, the flanged structure enhances the rigidity of the sound insulation panel itself, reducing the possibility of resonance caused by sound wave impact. Finally, it helps to form a more regular and sealed sound insulation cavity, improving the overall acoustic performance of the sound insulation layer.

[0023] In this embodiment, the enclosure sound insulation panel 70 has several mesh openings. The mesh structure gives the enclosure sound insulation panel 70 a certain degree of acoustic permeability, allowing noise waves to enter the sound insulation cavity behind it and be fully absorbed by the sound insulation cotton 80, especially significantly improving the absorption effect of mid-to-high frequency noise.

[0024] Furthermore, the downward-facing side of the sound insulation cotton 80 in the enclosure's sound insulation layer is coated with an anti-permeability coating. Since the enclosure's sound insulation panel 70 is located above the smoke hood 10, directly facing the source of oil fumes, although it has mesh openings, there is still a risk of oil seepage during long-term use. Applying an anti-permeability coating, such as polytetrafluoroethylene (PTFE) or polyurethane (PU), to the downward-facing side of the sound insulation cotton 80 effectively blocks oil, water vapor, and other pollutants, preventing them from seeping in and contaminating or clogging the porous structure of the sound insulation cotton 80. This maintains the excellent sound absorption performance of the sound insulation cotton 80 for a long time, extending the service life and stability of the entire sound insulation system and ensuring the long-term effectiveness of the product.

[0025] In this embodiment, the lower part of the front panel of the volute 40 is inclined backward; the exhaust duct 50 has a channel structure with a cross-section that gradually narrows from bottom to top. The rearward inclination of the lower part of the front panel of the volute 40 causes the cross-sectional area of ​​the exhaust duct 50 to gradually narrow from bottom to top (a tapering duct). This effectively guides and accelerates the oil fume airflow rising from the fume hood 10, allowing it to converge more smoothly and be drawn into the air inlet of the fan 30, significantly reducing eddies, turbulence, and impact losses in the airflow at this location.

[0026] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A range hood with a noise reduction and quiet operation structure, comprising a smoke collection hood (10), a fan housing (20) disposed above the smoke collection hood (10), and a volute (40) disposed within the fan housing (20) for installing a fan (30); characterized in that: The front panel of the volute (40) and the front side of the air handling unit (20) form a smoke exhaust duct (50); the rear side of the smoke exhaust duct (50) is connected to the air inlet of the fan (30), and the lower side of the smoke exhaust duct (50) is connected to the inner cavity of the smoke collection hood (10). The air handling unit (20) is provided with cabinet sound insulation panels (60) on the front and side panels; the cabinet sound insulation panels (60) and the side panels of the air handling unit (20) form a cabinet sound insulation layer; the upper side of the smoke hood (10) is provided with a box sound insulation panel (70), the box sound insulation panel (70) and the upper wall of the smoke hood (10) form a box sound insulation layer; the cabinet sound insulation layer and the box sound insulation layer are inlaid with sound insulation cotton (80).

2. The range hood with noise reduction and quiet operation structure according to claim 1, characterized in that: The cabinet sound insulation panel (60) and the box sound insulation panel (70) are stamped sheet metal parts.

3. The range hood with noise reduction and quiet operation structure according to claim 2, characterized in that: The outer edges of the cabinet sound insulation panel (60) and the box sound insulation panel (70) are provided with a flange structure, forming a flat box-shaped structure with an opening on at least one side, so as to clamp or slide the sound insulation cotton (80).

4. The range hood with noise reduction and quiet operation structure according to claim 1, characterized in that: The sound insulation panel (70) of the enclosure has several mesh openings.

5. The range hood with noise reduction and quiet operation structure according to claim 4, characterized in that: The sound insulation cotton (80) of the box body sound insulation layer is coated with an anti-permeability coating on the downward side.

6. The range hood with noise reduction and quiet operation structure according to claim 1, characterized in that: The front panel of the volute (40) is tilted backward; the exhaust duct (50) has a channel structure with a cross-section that gradually narrows from bottom to top.

Images