Range hood

Abstract

The embodiment of the utility model provides a range hood and relates to the technical field of kitchen appliances. The range hood comprises a machine body and a left-handed material structure, wherein the left-handed material structure is arranged on the machine body. According to the negative direction refraction principle of the left-handed material, sound waves generated in the machine body can be refracted, so that the sound waves are transmitted in the direction away from a user, the noise reduction effect is improved, and the use comfort of the user is improved.

Description

Technical Field

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

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It can quickly remove waste from stove combustion and fumes generated during cooking, discharge them outdoors, reduce pollution, and purify the air.

[0003] Range hoods generate noise during operation, and conventional techniques generally employ sound-absorbing materials to reduce the impact of noise on users. However, such sound-absorbing materials have a poor noise reduction effect, which can easily affect the user's experience. Utility Model Content

[0004] The purpose of the utility model is to provide a range hood that can improve the noise reduction effect and enhance the user's comfort.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a range hood, comprising:

[0007] body; and

[0008] Left-hand material structure, left-hand material structure is set on the body.

[0009] In an optional embodiment, the body includes a side shell and a top shell, the side shell is connected to the top shell, and the number of left-handed material structures is two, one of which is arranged on the side shell and the other is arranged on the top shell.

[0010] In an optional embodiment, the range hood further comprises a first driving device, which is disposed on the side shell and connected to the left-handed material structure disposed on the side shell, so as to drive the left-handed material structure to move relative to the side shell; and / or,

[0011] The range hood further includes a second driving device, which is disposed on the top shell and connected to the left-handed material structure disposed on the top shell, so as to drive the left-handed material structure to move relative to the top shell.

[0012] In an optional embodiment, the range hood further comprises a sound field detection probe, the side shell is provided with a sound field detection probe, and the sound field detection probe is used to cooperate with the first driving device; and / or,

[0013] The top shell is provided with a sound field detection probe, which is used to cooperate with the second driving device.

[0014] In an optional embodiment, the first driving device includes a first motor and a first push rod, both of which are arranged on the side housing, the first motor is in transmission connection with the first push rod, and the first push rod is connected to the left-hand material structure arranged on the side housing; and / or,

[0015] The second driving device includes a second motor and a second push rod, both of which are arranged on the top shell. The second motor is transmission-connected to the second push rod, and the second push rod is connected to the left-hand material structure arranged on the top shell.

[0016] In an optional embodiment, the body further includes a middle shell, and the top shell, the middle shell and the side shell are connected in sequence; the range hood further includes a sound absorbing material module;

[0017] At least one of the top shell, the middle shell and the side shell is provided with a sound absorbing material module.

[0018] In an optional embodiment, at least one of the top shell, the middle shell and the side shell is provided with a resonance structure, the resonance structure is provided with a resonance cavity and a plurality of sound-transmitting holes, the plurality of sound-transmitting holes are all connected to the resonance cavity, and the sound-absorbing material module is arranged in the resonance cavity.

[0019] In an optional embodiment, the left-hand material structure includes a mounting plate and a plurality of left-hand material modules. The mounting plate is disposed on the machine body, and the plurality of left-hand material modules are all disposed on the mounting plate.

[0020] In an optional embodiment, a plurality of left-handed material modules are arranged in a rectangular array.

[0021] In an optional embodiment, the left-handed material module includes a negative dielectric constant metal rod and a negative magnetic permeability resonant split ring, and the negative dielectric constant metal rod and the negative magnetic permeability resonant split ring are arranged on the same side of the mounting plate.

[0022] The beneficial effects of the embodiments of the present utility model include:

[0023] The range hood includes a body and a left-handed material structure, which is attached to the body. Due to the principle of negative refraction in left-handed materials, when the range hood is in operation, sound waves generated by a sound source within the body are negatively refracted by the left-handed material structure. This refracted sound waves are then transmitted away from the user, reducing the transmission of noise to the ear. This improves the noise reduction effect and enhances user comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of a range hood from a first perspective provided by an embodiment of the utility model;

[0026] Figure 2 A schematic structural diagram of a range hood from a second perspective provided by an embodiment of the present invention;

[0027] Figure 3 A schematic structural diagram of a range hood from a first perspective provided by another embodiment of the present invention;

[0028] Figure 4 A schematic structural diagram of a range hood from a second perspective provided by another embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a resonance structure provided by another embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the left-handed material structure provided by an embodiment of the present utility model.

[0031] Icons: 100-range hood; 10-machine body; 11-side shell; 12-top shell; 13-middle shell; 14-resonance structure; 141-resonance cavity; 142-sound-permeable hole; 20-left-handed material structure; 21-mounting plate; 22-left-handed material module; 221-negative dielectric constant metal rod; 222-negative magnetic permeability resonant split ring; 30-first driving device; 31-first push rod; 40-sound field detection probe; 200-sound source. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", not that the structure must be completely horizontal, but can be slightly tilted.

[0037] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] As described in the background art, range hoods generate noise during operation. Existing technology typically employs sound-absorbing materials to reduce the impact of noise on users. However, such materials have a poor noise reduction effect, which can easily affect user experience.

[0039] Based on this, please refer to Figures 1-6The embodiment of the present invention provides a range hood 100 that can effectively improve the above-mentioned technical problems, that is, it can improve the noise reduction effect and enhance the user's comfort. The range hood 100 will be described in detail below.

[0040] Please refer to Figure 1 and Figure 2 , Figure 1 This is a structural diagram of the range hood 100 provided in this embodiment from a first perspective. Figure 2 This is a schematic diagram of the structure of the range hood 100 provided in this embodiment from a first perspective, combined with Figure 1 and Figure 2 The range hood 100 includes a body 10 and a left-handed material structure 20, which is disposed on the body 10. Due to the principle of negative refraction of left-handed materials, when the range hood 100 is in operation, sound waves generated by a sound source 200 within the body 10 are negatively refracted after passing through the left-handed material structure 20. This refracted sound waves are transmitted away from the user, reducing the transmission of noise to the human ear, thereby improving the noise reduction effect and enhancing user comfort.

[0041] It should be noted that a left-handed material is a material with both a negative dielectric constant and a negative magnetic permeability. When electromagnetic waves propagate through it, the relationship between the wave vector k, the electric field E, and the magnetic field H conforms to the left-hand law, hence the name "left-handed material." Left-handed materials exhibit unique physical properties such as negative phase velocity, negative refractive index, ideal imaging, inverse Doppler frequency shift, and anomalous Cerenkov radiation. Therefore, a left-handed material structure 20 is provided in the body 10. Through its negative refractive index, the sound waves, after being refracted in the negative direction, can be transmitted in a direction away from the user, thereby improving the noise reduction effect.

[0042] Those skilled in the art will readily understand that the noise generated by the range hood 100 during operation is primarily mechanical noise and aerodynamic noise. Mechanical noise includes noise generated by the high-speed rotation of mechanical devices such as the motor and fan, as well as noise caused by vibration of the range hood components. Aerodynamic noise, on the other hand, includes noise caused by the squeezing and pulsation of high-speed airflow, as well as noise caused by the turbulent boundary layer formed by gas flowing over surfaces and the flow of the fluid. Therefore, the specific location of the left-handed material structure 20 on the range hood body 100 should be determined based on the location of the primary sound source 200 of the range hood 100.

[0043] Specifically, in this embodiment, the sound source 200 is located at the top of the range hood 10, specifically on the side of the range hood 10 closest to the wall when the range hood 100 is conventionally installed in a user's kitchen. The range hood 10 includes a side housing 11 and a top housing 12, which are connected to each other. There are two left-handed material structures 20, one of which is located in the side housing 11 and the other in the top housing 12.

[0044] like Figure 2 As shown, the sound waves of the sound source 200 pass through the channels in the side shell 11 and the top shell 12 respectively and are emitted in the direction of the two left-handed material structures 20, that is, the main directions of the sound waves can be divided into Figure 2 The directions A and B shown in the figure are refracted in the negative direction by the two left-handed material structures 20, so that the refracted sound waves are transmitted along the directions A1 and B1 in the figure.

[0045] It should be noted that Figure 2 The directions A2 and B2 shown in the figure are both the propagation directions of the sound waves after refraction through existing conventional materials. That is, it can be understood that the directions A2 and B2 are both positive directions after refraction. It is easy to understand that by providing the left-handed material structure 20, the sound waves are transmitted in the negative direction relative to existing conventional materials, allowing them to travel in a direction away from the user, thereby reducing the noise entering the human ear. By providing the left-handed material structure 20 in both the top shell 12 and the side shell 11, this embodiment can reduce the transmission of sound waves refracted from different directions toward the user, thereby further improving the noise reduction effect and user comfort.

[0046] It should be pointed out that the specific positions of the left-hand material structure 20 on the side shell 11 and the top shell 12, that is, the distance from the sound source 200, will affect the transmission direction of the sound wave after refraction; and, due to the different positions of the user on the body 10 and the existence of factors such as the user's height, they will be affected by the transmission of different sound waves and have noises of different intensities.

[0047] Therefore, in order to adjust the direction of the sound wave after refraction to suit the different positions and heights of the user, please refer to Figure 3 , Figure 3 A schematic structural diagram of a range hood 100 from a first perspective provided in another embodiment, combined with Figure 3 The range hood 100 further includes a first driving device 30 , which is disposed on the side shell 11 and connected to the left-handed material structure 20 disposed on the side shell 11 for driving the left-handed material structure 20 to move relative to the side shell 11 .

[0048] That is to say, the left-handed material structure 20 is driven to move on the side shell 11 by the first driving device 30, and the position of the left-handed material structure 20, that is, the distance between it and the sound source 200, is adjusted, so that the sound waves refracted by the left-handed material structure 20 are not transmitted in the direction of the user as much as possible, thereby reducing the noise value at the user's position, thereby further improving the noise reduction effect.

[0049] It should be noted that, in some other embodiments, the left-handed material structure 20 located on the top shell 12 can also be moved and adjusted. Specifically, the range hood 100 also includes a second driving device, which is arranged on the top shell 12 and connected to the left-handed material structure 20 arranged on the top shell 12, so as to drive the left-handed material structure 20 to move relative to the top shell 12.

[0050] Please continue to combine Figure 3 Specifically, in another embodiment, the first driving device 30 includes a first motor (not shown) and a first push rod 31, both of which are provided on the side housing 11. The first motor is transmission-connected to the first push rod 31, and the first push rod 31 is connected to the left-hand material structure 20 provided on the side housing 11. Of course, in some other embodiments, the second driving device may also include a second motor (not shown) and a second push rod (not shown), both of which are provided on the top housing 12. The second motor is transmission-connected to the second push rod provided on the top housing 12, and the second push rod is connected to the left-hand material structure 20.

[0051] Furthermore, in order to better control the movement of the left-hand material structure 20 and further improve the noise reduction effect, please refer to Figure 4 , Figure 4 A schematic structural diagram of a range hood 100 from a second perspective according to another embodiment, Figure 3 and Figure 4 The range hood 100 further includes a sound field detection probe 40, which is disposed on the side housing 11 and is configured to cooperate with the first drive device 30. Specifically, the sound field detection probe 40 can detect the noise level in the user's environment. Then, in conjunction with the first drive device 30, the left-handed material structure 20 is moved and adjusted in position until the noise level detected by the sound field detection probe 40 is minimized. At this point, the left-handed material structure 20 stops moving, thereby minimizing the noise level in the user's environment and improving user comfort.

[0052] Of course, in some other embodiments, a sound field detection probe 40 may also be provided on the top shell 12. It is easy to understand that the sound field detection probe 40 is used to cooperate with the second driving device.

[0053] Please combine Figures 1-4The housing 10 further includes a middle housing 13. The top housing 12, the middle housing 13, and the side housings 11 are sequentially connected. Specifically, the middle housing 13 has an inclined surface. Of course, in other embodiments, the middle housing 13 may also have a surface with other structures. It should be noted that in some embodiments, a left-handed material structure 20 may also be provided on this inclined surface to enhance noise reduction.

[0054] In order to further reduce noise, the range hood 100 also includes a sound-absorbing material module, which is provided on the top shell 12 and the middle shell 13 (not shown in the figure), and at least one of the top shell 12, the middle shell 13 and the side shell 11 is provided with a sound-absorbing material module.

[0055] It should be noted that there is an acoustic energy collision zone between the top shell 12, the middle shell 13 and the side shell 11, which can also be understood as the regional environment formed by all sound waves refracted and converged when the user is facing the body 10. Therefore, in order to oscillate and dissipate the sound energy in this area, please continue to combine Figure 3 and Figure 4 In another embodiment, both the top shell 12 and the middle shell 13 are provided with a resonance structure 14; of course, in some other embodiments, the resonance structure 14 can be provided only in the top shell 12, or only in the middle shell 13, or only in the side shell 11. Of course, the resonance structure 14 can also be provided in all three or in two of the three; that is, at least one of the top shell 12, the middle shell 13 and the side shell 11 is provided with a resonance structure 14.

[0056] Specifically, please refer to Figure 5 , Figure 5 is a schematic diagram of the resonance structure 14, combined with Figure 5 The resonant structure 14 includes a resonant cavity 141 and multiple sound-transmitting holes 142. The multiple sound-transmitting holes 142 are all connected to the resonant cavity 141, and the sound-absorbing material module is disposed within the resonant cavity 141. Through the coordinated arrangement of the sound-absorbing material module, the resonant cavity 141, and the sound-transmitting holes 142, the sound energy generated from within the body 10 is absorbed and reduced by the sound-absorbing material module. At the same time, the resonant cavity 141 and the sound-transmitting holes 142 also help to further oscillate and dissipate the sound energy refracted into this area, thereby further reducing the noise in the entire sound field area.

[0057] Please refer to Figure 6 , Figure 6 The schematic diagram of the left-handed material structure 20 provided in this embodiment is combined with Figure 2 and Figure 6 The left-hand material structure 20 includes a mounting plate 21 and a plurality of left-hand material modules 22 . The mounting plate 21 is disposed on the body 10 , and the plurality of left-hand material modules 22 are all disposed on the mounting plate 21 .

[0058] It should be noted that, in this embodiment, the plurality of left-handed material modules 22 are arranged in a rectangular array; of course, in some other embodiments, the plurality of left-handed material modules 22 may also be arranged in other arrays such as a ring, a wave, or a triangle.

[0059] Specifically, in this embodiment, the left-handed material module 22 includes a negative dielectric constant metal rod 221 and a negative magnetic permeability resonant split ring 222. The negative dielectric constant metal rod 221 and the negative magnetic permeability resonant split ring 222 are arranged on the same side of the mounting plate 21. It should be noted that the negative dielectric constant metal rod 221 and the negative magnetic permeability resonant split ring 222 can be arranged and coordinated with each other in a certain pattern to achieve negative refraction of sound waves. This embodiment does not limit the arrangement of the two.

[0060] In summary, embodiments of the present invention provide a range hood 100, comprising a housing 10 and a left-handed material structure 20, disposed within the housing 10. Due to the principle of negative refraction of left-handed materials, when the range hood 100 is in operation, sound waves generated by a sound source 200 within the housing 10 undergo negative refraction after passing through the left-handed material structure 20. This allows the refracted sound waves to propagate away from the user, reducing the transmission of noise to the human ear. This improves the noise reduction effect and enhances user comfort.

[0061] The above description is merely a specific embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A range hood, characterized in that: include: Body (10); as well as A left-hand material structure (20) is provided on the machine body (10).

2. The range hood according to claim 1, characterized in that: The body (10) includes a side shell (11) and a top shell (12), wherein the side shell (11) is connected to the top shell (12), and the number of the left-handed material structures (20) is two, wherein one of the left-handed material structures (20) is arranged on the side shell (11), and the other left-handed material structure (20) is arranged on the top shell (12).

3. The range hood according to claim 2, characterized in that: The range hood (100) further comprises a first driving device (30), the first driving device (30) being arranged on the side shell (11) and connected to a left-handed material structure (20) arranged on the side shell (11) for driving the left-handed material structure (20) to move relative to the side shell (11); and / or, The range hood (100) further includes a second driving device, which is arranged on the top shell (12) and connected to the left-hand material structure (20) arranged on the top shell (12) to drive the left-hand material structure (20) to move relative to the top shell (12).

4. The range hood according to claim 3, characterized in that: The range hood (100) further comprises a sound field detection probe (40), the side shell (11) is provided with the sound field detection probe (40), and the sound field detection probe (40) is used to cooperate with the first driving device (30); and / or, The top shell (12) is provided with the sound field detection probe (40), and the sound field detection probe (40) is used to cooperate with the second driving device.

5. The range hood according to claim 3, characterized in that: The first driving device (30) comprises a first motor and a first push rod (31) both of which are arranged on the side housing (11), the first motor is in transmission connection with the first push rod (31), and the first push rod (31) is connected to the left-hand material structure (20) arranged on the side housing (11); and / or, The second driving device includes a second motor and a second push rod both of which are arranged on the top shell (12); the second motor is transmission-connected to the second push rod; and the second push rod is connected to the left-hand material structure (20) arranged on the top shell (12).

6. The range hood according to claim 2, characterized in that: The machine body (10) further comprises a middle shell (13), the top shell (12), the middle shell (13) and the side shell (11) being connected in sequence; the range hood (100) further comprises a sound absorbing material module; Wherein, at least one of the top shell (12), the middle shell (13) and the side shell (11) is provided with the sound absorbing material module.

7. The range hood according to claim 6, characterized in that: At least one of the top shell (12), the middle shell (13) and the side shell (11) is provided with a resonance structure (14), the resonance structure (14) is provided with a resonance cavity (141) and a plurality of sound-transmitting holes (142), the plurality of sound-transmitting holes (142) are all connected to the resonance cavity (141), and the sound-absorbing material module is arranged in the resonance cavity (141).

8. The range hood according to claim 1, characterized in that: The left-hand material structure (20) comprises a mounting plate (21) and a plurality of left-hand material modules (22); the mounting plate (21) is arranged on the machine body (10); and the plurality of left-hand material modules (22) are all arranged on the mounting plate (21).

9. The range hood according to claim 8, characterized in that: The plurality of left-hand material modules (22) are arranged in a rectangular array.

10. The range hood according to claim 8, characterized in that: The left-handed material module (22) comprises a negative dielectric constant metal rod (221) and a negative magnetic permeability resonant split ring (222), wherein the negative dielectric constant metal rod (221) and the negative magnetic permeability resonant split ring (222) are arranged on the same side of the mounting plate (21).

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