An active noise reduction device and a range hood

Abstract

An active noise reduction device and a range hood provided by the present invention include: a housing including a receiving cavity, with an opening provided on one side of the receiving cavity; a dust collecting member provided on the opening, including at least one electrode plate, the electrode plate being adapted to be connected to an external power supply and adsorb dirt particles on the periphery; and a noise reduction member provided in the receiving cavity, adapted to collect noise outside the housing along the opening, or emit sound waves for neutralizing noise to the outside of the housing. By providing an electrode plate on the opening and charging the electrode plate by connecting it to an external power supply, the charged electrode plate can, through the phenomenon of electrostatic induction, adsorb fine particles such as oil fume and dust on the periphery, preventing them from flying into the interior of the housing and adhering to the noise reduction member, keeping the surface of the noise reduction member clean and ensuring the noise reduction effect.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and particularly relates to an active noise reduction device and a range hood. Background Art

[0002] With the improvement of people's living standards, people pay more and more attention to the environmental hygiene in the kitchen. As an electrical appliance for dealing with kitchen oil fume, the range hood is widely used in the air cleaning work in the kitchen. However, when the range hood absorbs oil fume, due to its own structural problems, it will also generate a certain degree of noise. At present, the noise reduction of the range hood mainly adjusts the dynamic balance between the air volume and the noise, or pastes sound-absorbing and vibration-damping materials inside, and the noise reduction effect is relatively limited. And using the active noise reduction method to control the noise of the range hood is a more efficient way to improve the noise reduction effect at present. The active noise reduction mainly emits sound waves through the sound generating device to neutralize the sound wave frequency of the noise.

[0003] However, when the existing active noise reduction device for the range hood is working, the misty oil fume will cover the active noise reduction device to form an oil film, blocking the sound wave transmission path and affecting the active noise reduction effect. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that oil and liquid are likely to accumulate on the active noise reduction device in the existing range hood, which affects the noise reduction effect, so as to provide an active noise reduction device and a range hood.

[0005] The present invention provides an active noise reduction device, including: a housing, including an accommodation cavity, and an opening is provided on one side of the accommodation cavity; a dust collection member, disposed on the opening, including at least one electrode plate, the electrode plate is adapted to be connected to an external power supply and adsorb dirt particles on the periphery; a noise reduction member, disposed in the accommodation cavity, adapted to collect noise outside the housing along the opening, or emit sound waves to neutralize the noise to the outside of the housing.

[0006] The noise reduction member is a sound generating member.

[0007] The dust collection member further includes a power member, the electrode plate is movably connected to the opening, and is adapted to rotate under the drive of the power member, and has a working state of opening the opening for the noise reduction member to emit or receive sound, and a closed state of being completely distributed along the opening and sealing the opening.

[0008] A plurality of the electrode plates are arranged in a row along the height direction on the opening and are parallel to each other.

[0009] In the closed state, the electrode plate is perpendicular to the orientation of the opening;

[0010] and / or,

[0011] In the working state, the electrode plate is arranged parallel to the opening direction.

[0012] The dust collecting member further includes a synchronizing device, which is arranged on the housing and is respectively connected to each of the electrode plates and the power member, and is adapted to synchronously transmit the driving force of the power member to each of the electrode plates.

[0013] The active noise reduction device further includes a sound receiving member, which is arranged outside the housing and is communicatively connected to the sound emitting member, and is adapted to detect the sound waves of the noise source.

[0014] The active noise reduction device further includes a partition plate, which is arranged in the accommodating cavity and is opposite to the opening, and has through holes formed thereon, and is adapted to accommodate and limit the sound emitting member.

[0015] The active noise reduction device further includes an oil containing cavity, which is arranged on the lower side of the dust collecting member.

[0016] The electrode plate includes an adsorption surface and an insulating surface. The adsorption surface is arranged as a conductor and is adapted to adsorb the dirt particles on the periphery. In the closed state, the adsorption surface faces the outside of the opening, and the insulating surface faces the inside of the opening.

[0017] An ion electrode plate is further arranged outside the opening, and a plurality of sound passing holes are formed thereon.

[0018] The active noise reduction device further includes a smoke detection device, which is arranged outside the housing and is communicatively connected to an external power supply.

[0019] The active noise reduction device further includes a controller, which is respectively communicatively connected to the power member, the sound emitting member, the sound receiving member, the smoke detection device and the external power supply.

[0020] This embodiment provides a range hood, which includes the above-mentioned active noise reduction device.

[0021] The technical solution of the present invention has the following advantages:

[0022] 1. An active noise reduction device provided by the present invention includes: a housing, including an accommodating cavity, and an opening is arranged on one side of the accommodating cavity; a dust collecting member, arranged on the opening, including at least one electrode plate, and the electrode plate is adapted to be connected to an external power supply and adsorb the dirt particles on the periphery; a noise reduction member, arranged in the accommodating cavity, and is adapted to collect the noise outside the housing along the opening, or emit sound waves for neutralizing the noise to the outside of the housing.

[0023] By arranging a housing to accommodate a noise reduction component, it is possible to not only protect the noise reduction component, but also ensure the normal operation of the function of the noise reduction component through the openings provided on the housing. At the same time, electrode plates are arranged on the openings, and by connecting to an external power supply, the electrode plates are charged. After being charged, the electrode plates can adsorb fine particles such as oil fumes and dust on the periphery through the phenomenon of electrostatic induction, preventing them from flying into the interior of the housing and adhering to the noise reduction component, keeping the surface of the noise reduction component clean and ensuring the noise reduction effect.

[0024] 2. For the active noise reduction device provided by the present invention, in the closed state, the electrode plates are arranged perpendicular to the orientation of the openings; and / or, in the working state, the electrode plates are arranged parallel to the orientation of the openings.

[0025] In the closed state, by setting the electrode plates and the orientation of the openings to be perpendicular, and arranging the respective electrode plates in the height direction, the openings are arranged on the side of the housing. In this way, the oil droplets adhering to the electrode plates can flow down along the height direction after the electrode plates are powered off, facilitating the user to collect the oil liquid and increasing the service life of the electrode plates. At the same time, in the working state, the electrode plates are parallel to the orientation of the openings, which can not only increase the amplitude of the openings, expand the sound wave transmission area, and improve the active noise reduction effect of the noise reduction component, but also increase the contact area between the electrode plates and the external space and improve the oil removal effect.

[0026] 3. The active noise reduction device provided by the present invention further includes an oil storage cavity, which is arranged below the dust collection component.

[0027] The arrangement of the oil storage cavity can, on the one hand, collect the oil liquid flowing down to the lower side of the dust collection component along gravity for subsequent treatment, and on the other hand, prevent the oil liquid on the electrode plates from flowing to the position of the noise reduction component and adhering to the noise reduction component, affecting the use of the noise reduction component.

[0028] 4. For the active noise reduction device provided by the present invention, the electrode plates include an adsorption surface and an insulating surface. The adsorption surface is arranged as a conductor and is suitable for adsorbing dirt particles on the periphery. In the closed state, the adsorption surface faces the outside of the opening, and the insulating surface faces the inside of the opening.

[0029] By arranging an insulator on one side of the electrode plate to avoid adsorbing oil stains, the adsorption surface of the side of the electrode plate with adhered oil stains faces the outside of the opening in the closed state, enabling the oil stains adhered to the electrode plate to reach the outside of the housing and preventing them from entering the housing, eliminating the need for the arrangement of an oil storage cavity.

[0030] 5. The active noise reduction device provided by the present invention further includes a smoke detection device, which is arranged outside the housing and is communicatively connected to an external power supply.

[0031] By setting up a smoke detection device and communicating it with an external power supply, the active noise reduction device can adjust the amount of electricity delivered by the external power supply to the electrode plate according to the detected amount of cooking fumes outside, ensuring that the charge carried by the electrode plate can effectively adsorb the surrounding oil stains and preventing oil stain particles from entering the accommodation cavity. Description of the Drawings

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Structural schematic diagram of the range hood provided in Embodiment 1 of the present invention;

[0034] Figure 2 is Figure 1 Structural schematic diagram when the electrode plate of the active noise reduction device of the range hood shown is in the working state;

[0035] Figure 3 is Figure 2 Structural schematic diagram when the electrode plate of the active noise reduction device of the range hood shown is switching between the working state and the closed state;

[0036] Figure 4 Structural schematic diagram of the active noise reduction device provided in Embodiment 3 of the present invention;

[0037] Figure 5 is is Figure 1 Structural schematic diagram when the electrode plate of the active noise reduction device of the range hood shown is in the working state;

[0038] Explanation of the reference numerals in the drawings:

[0039] 1. Housing; 2. Accommodation cavity; 3. Opening; 4. Sound generating member; 5. Electrode plate; 6. Power member; 7. Partition plate; 8. Outer electrode plate. Detailed Embodiments

[0040] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation on the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Embodiment 1

[0045] As Figures 1-3 , this embodiment provides an active noise reduction device, including: a housing 1, a dust collection member, and a noise reduction member.

[0046] The housing 1 is arranged in a square shape and has an accommodation cavity 2 inside. An opening 3 is provided on one side of the accommodation cavity 2. The position of the opening 3 is not limited and can be provided on the top side or the bottom side of the housing 1. As a preferred embodiment, the opening 3 is provided on the side wall of the accommodation cavity 2. At the same time, the opening 3 is arranged in a square shape, which is convenient for the subsequent installation and operation of the electrode plate 5.

[0047] The dust collection member is arranged on the opening 3 and includes a plurality of electrode plates 5. The electrode plates 5 are connected to an external power source through a power cord. After the power is turned on, the electrode plates 5 are charged with static electricity and can adsorb tiny particles of dirt such as oil stains on the periphery through electrostatic induction. The number of the electrode plates is not limited and can be one or more.

[0048] The noise reduction member is arranged in the accommodation cavity 2 and is arranged in the direction towards the opening 3. In this embodiment, the noise reduction member is a speaker member 4 and can emit sound waves that neutralize noise to the outside of the housing 1. As an alternative embodiment, the noise reduction member can also be a sound collection member and can collect the noise outside the housing 1 along the opening 3.

[0049] By arranging the housing 1 to accommodate the noise reduction component, it is possible to protect the noise reduction component and ensure the normal operation of the noise reduction component's function through the opening 3 provided on the housing 1. At the same time, an electrode plate 5 is provided on the opening 3. By connecting to an external power supply, the electrode plate 5 is charged. After being charged, the electrode plate 5 can adsorb fine particles such as oil fume and dust on its periphery through the phenomenon of electrostatic induction, preventing them from flying into the interior of the housing 1 and adhering to the noise reduction component, keeping the surface of the noise reduction component clean and ensuring the noise reduction effect.

[0050] The dust collection component further includes a power component 6, specifically a drive motor. A drive shaft is provided in the middle of the electrode plate 5, and the drive shaft is movably connected to both sides of the opening 3. The drive motor can be directly connected or act on the drive shaft through a transmission component to control the drive shaft to drive the electrode plate 5 to rotate, having a working state of opening the opening 3 to allow the sound emitting component 4 to emit sound to the outside of the accommodation cavity 2, and a closed state of being completely distributed along the opening 3 and sealing the opening 3.

[0051] There is no specific limitation on the arrangement of the electrode plates 5 on the opening 3, as long as the opening 3 can be closed and opened. In this embodiment, several electrode plates 5 are arranged along the height direction on the opening 3, and are parallel and evenly distributed to each other, so that the electrode plates 5 can be of the same shape, improving the interchangeability of the electrode plates 5 and reducing the difficulty of maintenance and replacement.

[0052] In this embodiment, the direction of the opening 3 is parallel to the horizontal plane. In the closed state, the electrode plate 5 is perpendicular to the orientation of the opening 3. In the working state, the electrode plate 5 is parallel to the orientation of the opening 3. As a transformable implementation, in the closed state, the electrode plate 5 and the opening 3 can be inclined, or, in the working state, the electrode plate 5 and the opening 3 can be staggered.

[0053] In the closed state, by setting the electrode plate 5 and the opening 3 to be perpendicular, and at the same time, each electrode plate 5 is arranged along the height direction, the opening 3 is provided on the side of the housing 1. In this way, the oil droplets adhering to the electrode plate 5 can flow down along the height direction after the electrode plate 5 is powered off, facilitating the user to collect the oil liquid and increasing the service life of the electrode plate 5. At the same time, in the working state, the electrode plate 5 is parallel to the orientation of the opening 3, which can not only increase the amplitude of the opening 3, expand the sound wave transmission area, and improve the active noise reduction effect of the noise reduction component, but also increase the contact area between the electrode plate 5 and the external space, improving its oil removal effect. As a transformable implementation, the opening angle of the motor plate in the working state can be adaptively adjusted according to the setting position of the internal noise reduction component.

[0054] The dust collector also includes a synchronization device. In this embodiment, the synchronization device is specifically a shutter structure, including several insulated connecting wires passing through each electrode plate 5, and a rope reel and a limiter arranged above the opening 3. The output shaft of the power element 6 is connected to the rope reel, and the rotation angle can be controlled to control the synchronous rotation of each electrode plate 5 to the same angle, thereby synchronously transmitting the driving force of the power element 6 to each electrode plate 5. As an alternative embodiment, the synchronization device can be omitted.

[0055] As a convertible embodiment, the electrode plate 5 may not be connected to the side of the opening 3, and may be hung at the opening 3 in a curtain-like manner through a rope reel provided on the upper side of the opening 3.

[0056] As another convertible embodiment, the synchronization device can be a gear rack structure arranged in the housing 1, or a synchronous belt and pulley matching structure.

[0057] In this embodiment, the active noise reduction device also includes a sound collecting element, which is arranged on the outside of the shell 1 and is electrically connected to the speaker 4. It can detect the sound waves of the noise source and transmit the signal to the speaker 4, so that the speaker 4 can adjust the neutralized sound wave information in real time according to the sound wave signal of the noise source.

[0058] The active noise reduction device also includes a partition 7, which is arranged in the middle of the accommodating cavity 2 and opposite to the opening 3. Two through holes are provided on the partition 7, which can accommodate and limit the two sound-emitting components 4 in the accommodating cavity 2, and can further limit the entry of oil droplets and other dirt into the circuit part of the noise reduction component, affecting the normal operation of the noise reduction component.

[0059] In addition, the active noise reduction device also includes an oil containing chamber, which is arranged on the lower side of the dust collecting part and is provided with an openable and closable oil leakage hole connected to the external oil cup, so that the user can handle the oil. The opening position of the oil containing chamber is provided with an oil guiding slope, which can drain the oil droplets dripping from the electrode plate 5.

[0060] As a convertible embodiment, the oil accommodating cavity can also be provided on the inner bottom surface of the accommodating cavity 2 between the partition plate 7 and the opening 3. In this embodiment, the inner bottom surface of the accommodating cavity 2 between the partition plate 7 and the opening 3 is further provided with an oil leakage hole.

[0061] The setting of the oil chamber can, on the one hand, collect the oil that flows to the lower side of the dust collecting part due to gravity, which is convenient for subsequent processing. On the other hand, it blocks the oil on the electrode plate 5 from flowing to the position of the noise reduction part, adhering to the noise reduction part, and affecting the use of the noise reduction part.

[0062] The active noise reduction device further includes a smoke detection device, which is arranged outside the housing 1 and communicatively connected to an external power supply. By arranging the smoke detection device and communicatively connecting it to the external power supply, the active noise reduction device can adjust the amount of power delivered by the external power supply to the electrode plate 5 according to the detected amount of oil fume outside, ensuring that the charge carried by the electrode plate 5 can effectively adsorb the surrounding oil stains and preventing oil stain particles from entering the accommodation cavity 2.

[0063] The active noise reduction device further includes a controller, which can be a single-chip microcomputer, a small PLC, a PC terminal, etc., and is electrically connected to the power component 6, the sound emitting component 4, the sound receiving component, the smoke detection device, and the external power supply respectively.

[0064] Embodiment 2

[0065] Based on Embodiment 1, in this embodiment, the electrode plate 5 is not completely a conductor. Its two side surfaces are an adsorption surface and an insulating surface. Among them, the adsorption surface is arranged as a conductor and is suitable for adsorbing the surrounding dirt particles, and the other side surface is an insulating surface and is arranged as an insulator. In the closed state, the adsorption surface faces the outside of the opening 3, and the insulating surface faces the inside of the opening 3.

[0066] By providing an insulator on one side of the electrode plate 5 to avoid adsorbing oil stains, the adsorption surface of the side of the electrode plate 5 with adhered oil stains faces the outside of the opening 3 in the closed state, so that the oil stains adhered to the electrode plate 5 can fall to the outside of the housing 1 or into the oil storage cavity, preventing them from entering the housing 1 and affecting the internal components.

[0067] Embodiment 3

[0068] As Figures 4-5 shown, based on Embodiment 1, in this embodiment, an outer electrode plate 8 is further arranged outside the opening 3. A plurality of sound passing holes are uniformly arranged thereon. The arrangement of the sound passing holes allows the sound waves collected or emitted by the noise reduction component to pass through, and at the same time imparts the same electric property as the outer electrode plate 8 itself to the particulate matters or dust, etc. flowing through the sound passing holes. At the same time, the two sides of the electrode plate 5 are respectively charged with different electricities, so that each electrode plate 5 has a single side for adsorbing dust. In this embodiment, the electricities of the two opposite sides of the electrode plate 5 and the outer electrode plate 8 are opposite.

[0069] By arranging the outer electrode plate 8, the side of the electrode plate 5 facing the outside of the opening attracts dust and dirt with opposite charges, preventing it from adsorbing oil stains on the side facing the accommodation cavity. The adsorption surface of the side of the electrode plate 5 with adhered oil stains faces the outside of the opening 3 in the closed state, so that the oil stains adhered to the electrode plate 5 can fall to the outside of the housing 1 or into the oil storage cavity below, preventing them from entering the housing 1.

[0070] Embodiment 4

[0071] This embodiment provides a range hood, which includes a housing and a volute assembly disposed inside the housing. A smoke collecting hood is provided below the housing. The above-mentioned active noise reduction device is disposed inside the housing, and the opening 3 faces the volute assembly.

[0072] Working process:

[0073] The range hood starts to work. Then the controller controls the activation of the active noise reduction device inside. The power component 6 starts, controls the rotation of the electrode plate 5, changes from the self-closed state to the working state, the opening 3 is in the open state, the sound emitting component 4 and the sound receiving component are activated. The smoke detection device detects the concentration of oil fume particles in the space around the housing 1. The controller adjusts the electric quantity of the electrode plate 5 according to the signal of the smoke detection device. When the concentration is lower than the preset value, it is judged that the range hood stops working or is in the standby state, and the active noise reduction device is controlled to close.

[0074] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. An active noise reduction device, characterized in that, Comprising: A housing (1) including a receiving cavity (2), with an opening (3) provided on one side of the receiving cavity (2); A dust collecting member provided on the opening (3), including at least one electrode plate (5), the electrode plate (5) being adapted to be connected to an external power source and adsorb dirt particles on its periphery; A noise reduction member provided in the receiving cavity (2), adapted to collect noise outside the housing (1) along the opening (3), or emit sound waves for neutralizing noise to the outside of the housing (1); The dust collecting member further includes a power member (6), the electrode plate (5) is movably connected to the opening (3), and is adapted to rotate under the drive of the power member (6), having a working state of opening the opening (3) for the noise reduction member to emit or receive sound, and a closed state of being completely distributed along the opening (3) and sealing the opening (3); The electrode plate (5) includes an adsorption surface and an insulating surface, the adsorption surface is arranged as a conductor and is adapted to adsorb dirt particles on its periphery. In the closed state, the adsorption surface faces the outside of the opening (3), and the insulating surface faces the inside of the opening (3).

2. The active noise reduction device according to claim 1, wherein The noise reduction member is a speaker (4).

3. The active noise reduction device according to claim 1, characterized in that: A plurality of the electrode plates (5) are arranged in a row along the height direction on the opening (3) and are parallel to each other.

4. The active noise reduction device according to claim 3, wherein In the closed state, the electrode plate (5) is perpendicularly arranged with respect to the orientation of the opening (3); And / or In the working state, the electrode plate (5) is parallelly arranged with respect to the orientation of the opening (3).

5. The active noise reduction device according to claim 1, characterized in that: The dust collecting member further includes a synchronization device, the synchronization device is provided on the housing (1), and is respectively connected to each of the electrode plates (5) and the power member (6), and is adapted to synchronously transmit the driving force of the power member (6) to each of the electrode plates (5).

6. The active noise reduction device according to any one of claims 1-5, characterized in that, It further includes a sound receiving member, provided outside the housing (1), and communicatively connected to the speaker (4), and is adapted to detect sound waves of a noise source.

7. The active noise reduction device according to claim 6, wherein It further includes a partition (7), the partition (7) is provided in the receiving cavity (2), is oppositely arranged to the opening (3), and has through holes provided thereon, and is adapted to accommodate and position the speaker (4).

8. The active noise reduction device according to claim 7, characterized in that, It further includes an oil receiving cavity provided below the dust collecting member.

9. The active noise reduction device according to claim 1, wherein, An outer electrode plate (8) is further provided outside the opening (3), and a plurality of sound passing holes are provided thereon.

10. The active noise reduction device according to claim 6, wherein, It further includes a smoke detection device, provided outside the housing (1), and communicatively connected to an external power source.

11. The active noise reduction device according to claim 10, characterized in that, It further includes a controller, which is communicatively connected to the power member (6), the speaker (4), the sound receiving member, the smoke detection device, and the external power source respectively.

12. An oil fume suction machine, characterized in that, Comprising the active noise reduction device according to any one of claims 1-11.

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