Silent volute for range hood

Abstract

A mute volute for a range hood comprises a front shell, a rear shell and a coaming installed between the front shell and the rear shell, the front shell, the rear shell and the coaming define a hollow shell-shaped structure with an air outlet in the top, a front air inlet is formed in the front shell, a flow guide ring is installed on the front air inlet, a rear air inlet is formed in the rear shell, and a motor is installed on the rear air inlet. The motor is connected with the wind wheel installed in the shell and drives the wind wheel to rotate. Sound insulation layers are installed on the inner walls of the coaming and / or the front shell and the rear shell through damping layers, and the sound insulation layers are similar to the inner surfaces of the coaming, the front shell and the rear shell in shape. The volute has the advantages that the sound insulation layers are installed on the coaming of the volute, the inner wall of the front shell and the inner wall of the rear shell, so that noise generated in the operation process is effectively reduced. The sound insulation layer can be sound insulation cotton or a polyurethane foaming layer, and the materials are known to have excellent sound absorption performance, so that more silent use experience is provided.

Description

Technical Field

[0001] The utility model relates to a range hood accessory, in particular to a silent volute for a range hood. Background Art

[0002] Range hoods are an essential part of modern kitchen equipment, helping to remove fumes and odors generated during cooking. In order to provide a more comfortable kitchen environment, noise reduction is a key consideration in range hood design. Currently, common noise reduction technologies mainly include adjusting the installation position of the volute and impeller, changing the volute structure, and optimizing the shape of the impeller blades. These measures are aimed at achieving the effect of reducing noise by physically changing the aerodynamic characteristics inside the range hood.

[0003] However, although these technologies can reduce the operating noise of the range hood to a certain extent, they usually involve complex design and manufacturing processes, resulting in higher overall costs. In addition, these structural changes often require the use of more or higher-specification materials, further increasing the cost of production and subsequent maintenance. Due to the complexity and cost of these technical adjustments, they are generally not suitable for widespread application in all models of range hoods.

[0004] In addition, although these traditional methods can reduce noise to a certain extent, the noise reduction effect is often unsatisfactory. In actual use, users often report that even for high-end products, the noise level still has a negative impact on the comfort and user experience of the kitchen. Therefore, there is an urgent need to make further improvements. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a silent volute for a range hood which has a simple structure, is easy to use, has a low production cost, and can effectively reduce noise and vibration during the operation of the range hood.

[0006] The purpose of the utility model is achieved in the following way: a silent volute for a range hood, comprising a front shell, a rear shell, and a panel installed therebetween, the three together forming a shell-like structure with a hollow interior and an air outlet on the top, a front air inlet being provided on the front shell, a guide ring being installed on the front air inlet, a rear air inlet being provided on the rear shell, a motor being installed on the rear air inlet, the motor being connected to a wind wheel installed in the shell, and driving the wind wheel to rotate; a sound insulation layer is installed on the inner walls of the panel and / or the front shell and the rear shell through a shock-absorbing layer, and the sound insulation layer is arranged in a shape similar to the inner surfaces of the panel, the front shell and the rear shell.

[0007] Specifically: the sound insulation layer is sound insulation cotton.

[0008] Specifically: the sound insulation layer is a polyurethane foam layer.

[0009] Specifically: a plurality of sound-absorbing holes are provided on the sound-insulating layer.

[0010] Specifically: the sound-absorbing holes are arranged through both the inner and outer surfaces of the sound insulation layer.

[0011] Specifically: the sound-absorbing hole is a blind hole arranged on the inner surface of the sound-insulating cotton.

[0012] Specifically: the thickness of the sound insulation layer is 2mm-5mm, the distance between the silencer holes is 10mm-15mm, and the diameter of the silencer holes is 2mm-5mm.

[0013] Specifically: the inner surface of the sound insulation layer is covered with a sealing layer.

[0014] Specifically: the shock-absorbing layer is a silicone adhesive layer adhered to the inner wall of the volute, and the sound insulation layer is adhered and fixed in the volute through the silicone adhesive layer.

[0015] The beneficial effects of the utility model are:

[0016] 1. Simple structure, low production cost and improved market competitiveness.

[0017] 2. The utility model effectively reduces the noise generated during operation by installing a sound insulation layer on the inner wall of the volute enclosure, the front shell and the rear shell. The sound insulation layer can be a sound insulation cotton or a polyurethane foam layer, which are known to have excellent sound absorption performance, thereby providing a quieter use experience.

[0018] 3. Several silencer holes are designed on the sound insulation layer. These silencer holes can further optimize the absorption and isolation of sound waves, reduce the propagation of sound waves caused by the rotation of the wind wheel, and thus achieve a more efficient noise reduction effect.

[0019] 4. The utility model provides a variety of sound insulation layer materials and silencer hole design options, such as the thickness of the sound insulation layer and the size and spacing of the silencer holes, so that the silent volute can be adjusted according to different application requirements to meet different levels of noise reduction requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the general assembly drawing of the utility model structure.

[0021] Figure 2 This is the structural assembly drawing of the utility model.

[0022] Figure 3 This is a schematic diagram of the structure after the wind wheel is hidden in the utility model.

[0023] Figure 4 This is an assembly diagram of the sound insulation layer and the volute in the utility model.

[0024] Figure 5 It is a schematic diagram of the structure of the sound insulation layer in the utility model.

[0025] Figure 6 It is a partial structural sectional view of the utility model.

[0026] Marking name description: 1 - front shell; 10 - silencer hole; 11 - front air inlet; 2 - rear shell; 3 - enclosure; 4 - air outlet; 5 - guide ring; 6 - motor; 7 - wind wheel; 8 - shock absorption layer; 9 - sound insulation layer DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings. A silent volute for a range hood, comprising a front shell 1, a rear shell 2, and a panel 3 installed therebetween, the three together forming a hollow shell-like structure with an air outlet 4 on the top, a front air inlet 11 provided on the front shell 1, a guide ring 5 installed on the front air inlet 11, a rear air inlet provided on the rear shell 2, a motor 6 installed on the rear air inlet, the motor 6 connected to a wind wheel 7 installed in the shell, and driving the wind wheel 7 to rotate; a sound insulation layer 9 is installed on the inner wall of the panel 3 and / or the front shell 1 and the rear shell 2 through a shock-absorbing layer 8, and the sound insulation layer 9 is arranged in a shape similar to the inner surface of the panel 3, the front shell 1 and the rear shell 2.

[0028] In one embodiment, the sound insulation layer 9 is sound insulation cotton.

[0029] In one embodiment, the sound insulation layer 9 is a polyurethane foam layer.

[0030] In one embodiment, a plurality of sound-absorbing holes 10 are provided on the sound-insulating layer 9 .

[0031] In one embodiment, the muffler hole 10 is arranged through both the inner and outer surfaces of the sound insulation layer 9 .

[0032] In one of the embodiments: the muffler hole 10 is a blind hole arranged on the inner surface of the sound insulation cotton.

[0033] In one embodiment, the thickness of the sound insulation layer 9 is 2 mm to 5 mm, the distance between the silencer holes 10 is 10 mm to 15 mm, and the diameter of the silencer holes 10 is 2 mm to 5 mm.

[0034] In one embodiment, the inner surface of the sound insulation layer 9 is covered with a sealing layer.

[0035] In one embodiment, the shock-absorbing layer 8 is a silicone adhesive layer adhered to the inner wall of the volute, and the sound insulation layer 9 is adhered and fixed in the volute through the silicone adhesive layer.

[0036] Working principle: The volute structure of the range hood includes: 1. The front shell 1, which is the main inlet for air intake, has a front air inlet 11. This design allows air to flow smoothly into the volute. At the same time, a guide ring 5 is installed on the front shell, which helps to guide the incoming air to flow to the wind wheel in a more optimized path, reduce airflow turbulence, improve efficiency and reduce noise.

[0037] 2. The rear housing 2 provides another air inlet and a location for installing the motor 6. The motor is located at the rear air inlet and directly drives the wind wheel 7 located inside the volute. The rear air inlet on the rear housing not only takes in air, but also dissipates heat for the motor to prevent it from being damaged by excessive operating temperature.

[0038] 3. Coaming: It connects the front and rear shells. The coaming helps form a closed hollow space where the airflow can be effectively directed and controlled. The shape and size of the coaming will affect the airflow dynamics in the volute. Optimizing the design of the coaming can reduce airflow losses and improve overall efficiency.

[0039] 4. Sound insulation layer 9 This layer can be sound insulation cotton or polyurethane foam layer, or other materials, covering the inner wall of the enclosure, or the inner wall of the front shell and the rear shell. It can also be set separately on the inner wall of the enclosure, according to the actual noise reduction needs.

[0040] It should be noted that: when the range hood is working, when the smoke passes through the air duct, due to the turbulence, the rotation of the impeller and the noise generated by the volute, these sound waves will enter the micropores of the sound insulation layer. Under the action of the micropores and the silencer holes opened on them, the vibration of air molecules produces friction, thereby consuming sound energy. When the sound wave frequency in the micropores and silencer holes on the sound insulation layer matches the noise frequency, a strong resonance will occur. The sound waves need to overcome the friction resistance on the inner surface of the micropores and the common silencer holes, thereby converting a large amount of sound energy into heat energy to achieve a sound-absorbing effect. Specifically, the silencer holes can also be distributed in the direction of the extension of the enclosure, which can be random or distributed in an array. This structural design prolongs the contact time between the noise and the silencer holes on the sound insulation layer, thereby enhancing the sound-absorbing effect.

[0041] In order to reduce the vibration of the front shell, the rear shell and the enclosure during operation, the sound insulation layer in this case is installed in the volute through the shock-absorbing layer. Specifically, the shock-absorbing layer can be an adhesive layer. The thickness of the glue and the bubbles generated during the pasting process can be used to isolate the sound insulation layer from the volute, forming a certain cavity between the two, and the cavity can be used to achieve a certain sound insulation effect.

[0042] In another embodiment, the shock-absorbing layer is a silicone adhesive layer, which not only serves to adhere and fix the sound insulation layer, but also utilizes the thickness of the silicone adhesive and the strength after solidification to strengthen the enclosure and the front and rear plate structures of the volute, thereby preventing vibrations caused by wind pressure during operation and the resulting resonance noise.

[0043] Furthermore, the inner surface of the sound insulation layer may be covered with an additional sealing layer 12, which may be made of a metal plate layer, an aluminum foil layer, a rubber layer, a plastic layer, etc. This not only helps to further soundproof, but also prevents oil smoke and dust from entering the interior of the sound insulation material, keeps the sound insulation material clean, and prolongs its sound insulation effect.

[0044] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A silent volute for a range hood, comprising a front shell (1), a rear shell (2), and a panel (3) mounted therebetween, the three together forming a shell-like structure with a hollow interior and an air outlet (4) at the top, a front air inlet (11) being provided on the front shell (1), a guide ring (5) being mounted on the front air inlet (11), a rear air inlet being provided on the rear shell (2), a motor (6) being mounted on the rear air inlet, the motor (6) being connected to a wind wheel (7) mounted in the shell, and driving the wind wheel (7) to rotate; characterized in that: A sound insulation layer (9) is installed on the inner wall of the enclosure (3) and / or the front shell (1) and the rear shell (2) via a shock-absorbing layer (8); the sound insulation layer (9) is arranged to have a shape similar to that of the inner surface of the enclosure (3), the front shell (1) and the rear shell (2).

2. The silent volute for a range hood according to claim 1, characterized in that: The sound insulation layer (9) is sound insulation cotton.

3. The silent volute for a range hood according to claim 1, characterized in that: The sound insulation layer (9) is a polyurethane foam layer.

4. A silent volute for a range hood according to any one of claims 1 to 3, characterized in that: A plurality of sound-absorbing holes (10) are provided on the sound-insulating layer (9).

5. The silent volute for a range hood according to claim 4, characterized in that: The muffler holes (10) are arranged through both the inner and outer surfaces of the sound insulation layer (9).

6. The silent volute for a range hood according to claim 4, characterized in that: The muffler hole (10) is a blind hole arranged on the inner surface of the sound insulation cotton.

7. The silent volute for a range hood according to claim 4, characterized in that: The thickness of the sound insulation layer (9) is 2 mm to 5 mm, the distance between the sound-absorbing holes (10) is 10 mm to 15 mm, and the diameter of the sound-absorbing holes (10) is 2 mm to 5 mm.

8. The silent volute for a range hood according to claim 4, characterized in that: The inner surface of the sound insulation layer (9) is covered with a sealing layer.

9. The silent volute for a range hood according to claim 4, characterized in that: The shock-absorbing layer (8) is a silicone adhesive layer adhered to the inner wall of the volute, and the sound insulation layer (9) is adhered and fixed in the volute by the silicone adhesive layer.

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