Noise reduction device for range hood

Abstract

The utility model discloses a noise reduction device for a range hood, which belongs to the technical field of noise reduction devices, and comprises a range hood body, a wind wheel and an air inlet, the wind wheel is arranged in the range hood body, the air inlet is arranged on the range hood body, a mounting port is arranged above the air inlet, the range hood body is provided with the mounting port, and the mounting port is arranged above the air inlet. A mounting opening is formed in the machine body, a machine door is detachably arranged at the mounting opening, the wind wheel is arranged between the machine body and the machine door, a sound insulation plate is fixedly arranged on the machine door, a plurality of arc-shaped plates are fixedly arranged on the sound insulation plate, and fixing holes are formed in the arc-shaped plates. A plurality of fixing holes are formed in the arc-shaped plate, a waved plate is fixedly arranged on the machine door, the waved plate is arranged between the sound insulation plate and the arc-shaped plate, and the sound absorption effect of the range hood is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction devices, in particular to a noise reduction device for a range hood. Background Art

[0002] When cooking in the kitchen, oil smoke is produced. The kitchen oil smoke contains many harmful substances, which are harmful to human health. The range hood is an electrical appliance used in the family kitchen to remove the oil smoke produced during cooking. It is a necessary household kitchen appliance.

[0003] Now the common range hoods include a range hood body, a fan, an exhaust pipe and an air inlet. The fan wheel is arranged on the body, the air inlet is arranged on the body, and the exhaust pipe is arranged on the body. When in use, the fan wheel is started, and the oil smoke is sucked into the body from the air inlet. The oil smoke is processed in the body and discharged to the outside through the exhaust pipe. A detachable door is arranged on the body to facilitate the inspection and maintenance of the fan wheel.

[0004] Regarding the above technical conditions, there is still a defect that the fan wheel of the range hood makes a lot of noise when in use. Now, sound-absorbing cotton is usually used at the door to reduce the noise transmitted to the outside of the machine body, but the effect of noise reduction by sound-absorbing cotton alone is not good enough.

[0005] Based on this, the utility model designs a noise reduction device for a range hood to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a noise reduction device for a range hood to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a noise reduction device for a range hood, comprising a range hood body, a wind wheel and an air inlet, the wind wheel is arranged in the body, the air inlet is arranged on the body, the body is provided with a mounting port, the mounting port is above the air inlet, the mounting port is detachably provided with a door, the wind wheel is between the body and the door, a sound insulation board is fixedly provided on the door, an arc plate is fixedly provided on the sound insulation board, a plurality of the arc plates are provided on the sound insulation board, the arc plate is opened with a fixing hole, a plurality of the fixing holes are provided on the arc plate, a wave plate is fixedly provided on the door, and the wave plate is between the sound insulation board and the arc plate.

[0008] Preferably, the fixing hole is hexagonal in shape.

[0009] Preferably, the door is made of a material with good sound insulation effect.

[0010] Preferably, a first sound-absorbing cotton is fixedly arranged on the installation opening, and when the machine door is closed on the machine body, the first sound-absorbing cotton contacts the machine door.

[0011] Preferably, the arc-shaped plate is fixedly connected with a second sound-absorbing cotton, the second sound-absorbing cotton is fixedly connected to the corrugated plate, and the second sound-absorbing cotton is between the arc-shaped plate and the corrugated plate.

[0012] Preferably, the machine door is provided with a threaded hole, the threaded hole is threadedly connected with a fixing rod, and the fixing rod is threadedly connected to the machine body.

[0013] In summary, the present application has the following beneficial technical effects: when the wind wheel generates noise, the noise is transmitted to the outside through the machine door. During this process, the noise passes through the curved plate, the second sound-absorbing cotton, the corrugated plate, the sound insulation plate and the machine door in turn. When the noise passes through the curved plate and the corrugated plate, the noise is continuously reflected, and the noise continuously passes through the second sound-absorbing cotton. The energy of the noise is consumed and absorbed by the second sound-absorbing cotton, and the volume of the noise is reduced. When passing through the sound insulation plate, the noise is further weakened. Finally, the noise passes through the machine door, which is made of a material with good sound-absorbing effect, and the noise is weakened again. After multiple noise attenuations, when the noise is transmitted to the outside, the volume of the noise is the smallest, thereby achieving the effect of enhancing the noise reduction effect of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 is a schematic structural diagram of the range hood of this embodiment;

[0016] Figure 2 This is a schematic diagram of the structure of the door of this embodiment;

[0017] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0018] Figure 4 Schematic diagram of the cross-sectional structure of the door of this embodiment;

[0019] Figure 5 for Figure 4 A magnified schematic diagram of point B in the middle.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Fixing rod; 2. Machine door; 3. First sound-absorbing cotton; 4. Wind wheel; 5. Air inlet; 6. Fixing hole; 7. Curved plate; 8. Corrugated plate; 9. Sound insulation board; 10. Second sound-absorbing cotton; 11. Installation port; 12. Machine body. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The following is combined with Figure 1-5 This application is described in further detail.

[0024] A noise reduction device for a range hood includes a range hood body 12, a fan 4 and an air inlet 5. The fan 4 is arranged in the body 12, and the air inlet 5 is arranged on the body 12. The fan 4 is above the air inlet 5. When in use, the fan 4 is started, and the indoor fumes are sucked into the body 12 through the air inlet 5 and then discharged outdoors from the body 12.

[0025] The machine body 12 is provided with a mounting opening 11, on which a machine door 2 is detachably provided, and the wind wheel 4 is between the machine door 2 and the machine body 12. The machine door 2 is provided with a threaded hole, and a plurality of threaded holes are provided on the machine door 2. The threaded hole is threadedly connected with a fixing rod 1, and the fixing rod 1 is threadedly connected to the machine body 12. The threaded rod and the threaded hole enable the machine door 2 to be detachably provided on the machine body 12, so that the machine door 2 can be removed to inspect the wind wheel 4 conveniently.

[0026] A soundproofing plate 9 is fixedly provided on one side of the machine body 12 close to the wind wheel 4, and an arc plate 7 is fixedly provided on the soundproofing plate 9. A plurality of arc plates 7 are provided on the soundproofing plate 9, and a fixing hole 6 is provided on the arc plate 7. A plurality of fixing holes 6 are provided on the arc plate 7, and the fixing holes 6 facilitate the conduction of noise into the arc plate 7. A wave plate 8 is fixedly provided on the machine door 2, and the wave plate 8 is between the arc plate 7 and the soundproofing plate 9.

[0027] When the wind wheel 4 generates noise during operation, the noise transmitted to the machine door 2 passes through the curved plate 7, the corrugated plate 8, the sound insulation plate 9 and the machine door 2 in sequence. When the noise is transmitted to the curved plate 7 and the corrugated plate 8, due to the shape and structure of the curved plate 7 and the corrugated plate 8, the noise is continuously reflected on the curved plate 7 and the corrugated plate 8. The energy in the noise is consumed in the reflection, and the volume of the noise decreases accordingly. Then the noise is transmitted to the sound insulation plate 9. Due to the sound insulation effect of the sound insulation plate 9, the volume of the noise is further weakened. When the noise is transmitted to the outside through the machine door 2, the volume of the noise is relatively small.

[0028] The fixing hole 6 is in a hexagonal shape, so that when the noise is transmitted to the fixing hole 6, the noise is reflected multiple times at the fixing hole 6, consuming the energy of the noise. The machine door 2 is made of a material with good sound insulation effect, which enhances the noise reduction effect of the machine door 2. The first sound-absorbing cotton 3 is fixedly arranged on the installation opening 11. When the machine door 2 is installed on the machine body 12, the first sound-absorbing cotton 3 is pressed against the machine door 2, and the first sound-absorbing cotton 3 has a sound-absorbing effect, further enhancing the noise reduction effect of the machine door 2.

[0029] The arc plate 7 is fixedly connected with a second sound-absorbing cotton 10, and the second sound-absorbing cotton 10 is fixedly connected to the corrugated plate 8. The second sound-absorbing cotton 10 is between the arc plate 7 and the corrugated plate 8. When the noise is reflected multiple times between the corrugated plate 8 and the arc plate 7, the noise continuously passes through the second sound-absorbing cotton 10. In this process, the noise is absorbed by the second sound-absorbing cotton 10, the volume of the noise is reduced, and the noise transmitted to the outside is further reduced, and the noise reduction effect of the machine door 2 is better.

[0030] The implementation principle of this embodiment is as follows: when the wind wheel 4 generates noise when working, the noise is transmitted to the door 2 to the outside. During this process, the noise passes through the curved plate 7, the second sound-absorbing cotton 10, the corrugated plate 8, the sound insulation plate 9 and the door 2 in sequence. When the noise passes through the curved plate 7 and the corrugated plate 8, the noise is continuously reflected, and the noise continuously passes through the second sound-absorbing cotton 10. The energy of the noise is consumed and absorbed by the second sound-absorbing cotton 10, and the volume of the noise is reduced. When passing through the sound insulation plate 9, the noise is further weakened. Finally, the noise passes through the door 2. The door 2 is made of a material with good sound insulation effect, and the noise is weakened again. After multiple noise attenuations, when the noise is transmitted to the outside, the volume of the noise is the smallest, thereby achieving the effect of enhancing the noise reduction effect of the range hood.

[0031] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction device for a range hood, comprising a range hood body (12), a fan wheel (4) and an air inlet (5), characterized in that: The wind wheel (4) is arranged in the machine body (12), the air inlet (5) is arranged on the machine body (12), the machine body (12) is provided with a mounting port (11), the mounting port (11) is above the air inlet (5), the mounting port (11) is detachably provided with a machine door (2), the wind wheel (4) is between the machine body (12) and the machine door (2), a sound insulation board (9) is fixedly arranged on the machine door (2), an arc plate (7) is fixedly arranged on the sound insulation board (9), a plurality of the arc plates (7) are arranged on the sound insulation board (9), the arc plate (7) is provided with a fixing hole (6), a plurality of the fixing holes (6) are arranged on the arc plate (7), a wave plate (8) is fixedly arranged on the machine door (2), and the wave plate (8) is between the sound insulation board (9) and the arc plate (7).

2. The noise reduction device for a range hood according to claim 1, characterized in that: The fixing hole (6) is in a hexagonal shape.

3. The noise reduction device for a range hood according to claim 1, characterized in that: The machine door (2) is made of a material with good sound insulation effect.

4. The noise reduction device for a range hood according to claim 1, characterized in that: A first sound-absorbing cotton (3) is fixedly arranged on the installation opening (11); when the machine door (2) is closed on the machine body (12), the first sound-absorbing cotton (3) contacts the machine door (2).

5. The noise reduction device for a range hood according to claim 1, characterized in that: The arc-shaped plate (7) is fixedly connected to a second sound-absorbing cotton (10), the second sound-absorbing cotton (10) is fixedly connected to the corrugated plate (8), and the second sound-absorbing cotton (10) is between the arc-shaped plate (7) and the corrugated plate (8).

6. The noise reduction device for a range hood according to claim 1, characterized in that: The machine door (2) is provided with a threaded hole, a fixing rod (1) is threadedly connected to the threaded hole, and the fixing rod (1) is threadedly connected to the machine body (12).

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