A noise reduction range hood and method

Abstract

This application discloses a noise-reducing range hood and a noise reduction method. The noise-reducing range hood includes a first acquisition unit, a noise reduction unit, and a housing. Both the first acquisition unit and the noise reduction unit are located inside the housing. The first acquisition unit and the noise reduction unit are electrically connected. The position of the first acquisition unit is adjustable. The first acquisition unit is used to adjust its noise acquisition position based on the external noise of the range hood and acquire comprehensive noise at the noise acquisition position. The noise reduction unit is used to emit a noise-reducing wave based on the comprehensive noise. In the embodiments of this application, the first acquisition unit is adjusted to a suitable noise acquisition position based on the external noise of the range hood, so that the first acquisition unit can still acquire comprehensive noise, including the fan noise of the range hood and the cooking noise of the cooking module, even when the external noise is high, thereby improving the noise acquisition effect of the range hood and enhancing its noise reduction capability.

Description

Technical Field

[0001] This invention relates to the field of household kitchenware technology, specifically to a noise-reducing range hood and a noise reduction method. Background Technology

[0002] With economic development and improved living standards, range hoods have become essential kitchen appliances. In recent years, to enhance performance, manufacturers have launched high-airflow range hoods. However, high-airflow range hoods often generate significant noise, which can negatively impact residents' quality of life and health. To ensure a better user experience, these range hoods can be equipped with active noise reduction features. This works by using a noise sensor installed within the hood's duct to collect noise signals and then injecting a sound wave with the same frequency but opposite amplitude into the operating environment to reduce noise.

[0003] During the use of range hoods, the fan module is usually located at the top of the hood. External noise, including cooking noise, often flows into the hood through the air inlet located at the bottom. Therefore, the range hood's noise collection device needs to collect a combined noise level, including both the fan noise (internal noise) and the cooking noise flowing into the hood (external noise). One type of range hood fixes the collection device at the vent. When the user performs high-decibel operations such as frying or stir-frying, the external noise increases, affecting the collection device's ability to capture the fan noise. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention discloses a noise-reducing range hood and a noise reduction method, which can solve the problem in the prior art where external noise increases when users perform high-decibel operations such as frying and stir-frying using the cooking module, affecting the acquisition of fan noise by the acquisition device.

[0005] In a first aspect, in order to achieve the above-mentioned invention objectives, this application discloses a noise-reducing range hood, including a first collection unit, a noise-reducing unit, and a housing;

[0006] Both the first acquisition unit and the noise reduction unit are located inside the enclosure; the first acquisition unit and the noise reduction unit are electrically connected; the position of the first acquisition unit is adjustable.

[0007] The first acquisition unit is used to adjust the noise acquisition position of the first acquisition unit based on the external noise of the noise reduction range hood and to acquire the comprehensive noise at the noise acquisition position;

[0008] The noise reduction unit is used to generate noise-reducing waves based on the overall noise.

[0009] In one possible embodiment, the first acquisition unit includes a positioning unit and a first acquisition component;

[0010] The positioning unit is connected to the first acquisition component, and the positioning unit is used to drive the first acquisition component to rise and fall.

[0011] In one possible embodiment, the positioning part includes a drive assembly and a linkage rod;

[0012] The drive assembly includes a drive motor and a lead screw; the drive motor and lead screw are connected by a drive connection; the lead screw and the linkage are connected by a screw.

[0013] The first data acquisition component is fixedly mounted on the linkage rod;

[0014] When the position of the first acquisition component is adjusted, the drive motor drives the lead screw to rotate, which in turn drives the linkage rod to rise and fall, thereby causing the first acquisition component to rise and fall.

[0015] In one possible embodiment, the positioning part includes at least one lifting support slide rail;

[0016] The lifting support slide rail is set parallel to the lead screw, and the lifting support slide rail is movably connected to the linkage rod.

[0017] In one possible embodiment, the noise-reducing range hood also includes a second data acquisition unit;

[0018] The second acquisition unit is fixedly installed on the housing; the second acquisition unit is used to collect the external noise of the noise reduction range hood.

[0019] In one possible embodiment, the enclosure includes an air inlet located at the bottom of the enclosure;

[0020] The second collection unit is located near the air inlet.

[0021] In one possible embodiment, both the first acquisition component and the second acquisition unit include at least one microphone, and the noise reduction unit includes at least one speaker.

[0022] In one possible embodiment, the noise-reducing range hood also includes an electronic control system;

[0023] The electronic control system is used to receive noise reduction commands from users;

[0024] The electronic control system is used to control the opening and closing of the positioning part.

[0025] Secondly, this application also discloses a noise reduction method, which is applied to any of the noise reduction range hoods described above, and includes:

[0026] In response to the noise reduction command received through the electronic control system, the noise reduction mode is activated;

[0027] During the noise reduction process, the external noise of the noise-reducing range hood is collected through the second acquisition unit;

[0028] The amplitude of the external noise is determined by the electronic control system, and the target position of the first acquisition component is determined based on the amplitude of the external noise.

[0029] Determine the current position of the first acquisition component;

[0030] If there is a discrepancy between the current position and the target position, the positioning unit is controlled by the electronic control system to move the first acquisition component up and down to the target position.

[0031] The overall noise is acquired through the first acquisition component;

[0032] Based on the overall noise, a noise reduction wave is emitted through the noise reduction unit.

[0033] In one possible embodiment, determining the amplitude of external noise through an electronic control system and determining the target position of the first acquisition component based on the amplitude of the external noise includes:

[0034] The amplitude of external noise is determined by the electronic control system. If the amplitude of external noise is less than or equal to the first preset value, the target position is the first preset position; if the amplitude of external noise is greater than the first preset value and less than or equal to the second preset value, the target position is the second preset position; if the amplitude of external noise is greater than the second preset value, the target position is the third preset position.

[0035] The technical solution provided in this application has the following technical effects:

[0036] This application discloses a noise-reducing range hood and a noise reduction method. The noise-reducing range hood includes a first acquisition unit, a noise reduction unit, and a housing. Both the first acquisition unit and the noise reduction unit are located inside the housing. The first acquisition unit and the noise reduction unit are electrically connected. The position of the first acquisition unit is adjustable. The first acquisition unit is used to adjust its noise acquisition position based on the external noise of the range hood and acquire comprehensive noise at the noise acquisition position. The noise reduction unit is used to emit a noise-reducing wave based on the comprehensive noise. In the embodiments of this application, the first acquisition unit is adjusted to a suitable noise acquisition position based on the external noise of the range hood, so that the first acquisition unit can still acquire comprehensive noise, including the fan noise of the range hood and the cooking noise of the cooking module, even when the external noise is high, thereby improving the noise acquisition effect of the range hood and enhancing its noise reduction capability. Attached Figure Description

[0037] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is an overall schematic diagram of a noise-reducing range hood provided in an embodiment of this application;

[0039] Figure 2 This is a structural schematic diagram of a noise-reducing range hood provided in an embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the first collection unit of a noise-reducing range hood provided in an embodiment of this application;

[0041] Figure 4 This is a flowchart illustrating a noise reduction method provided in an embodiment of this application.

[0042] Among them, such as Figures 1 to 3 As shown in the figure, 1 is the first acquisition unit, 11 is the positioning unit, 111 is the drive component, 1111 is the drive motor, 1112 is the lead screw, 112 is the linkage rod, 113 is the lifting support slide rail, 114 is the movable connector, 12 is the first acquisition component, 121 is the microphone, 2 is the noise reduction unit, 21 is the speaker, 3 is the housing, 31 is the air inlet, and 4 is the second acquisition unit. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0044] It should be noted that the term "an embodiment" or "embodiment" in the specification of the embodiments of this application refers to a specific feature, structure, or characteristic that can be included in at least one implementation of this application. It should be understood that in the specification, claims, and accompanying drawings of the embodiments of this application, the terms "upper," "lower," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, in the description of this embodiment, unless otherwise stated, "a plurality of" means two or more. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, or product that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0045] It should be understood that when a device or component is referred to as being "on," "adjacent to," or "connected to" other devices or components, it may be directly on, adjacent to, or connected to other devices or components, or there may be intervening devices or components. Conversely, when a device or component is referred to as being "directly on," "directly adjacent to," or "directly connected to" other devices or components, there are no intervening devices or components. It should be understood that although the terms first, second, third, etc., may be used to describe various components, areas, layers, and / or parts, these components, areas, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one component, area, layer, or part from another component, area, layer, or part. Therefore, without departing from the teachings of this application, the first component, area, layer, or part discussed below may be referred to as the second component, area, layer, or part. And the discussion of the second component, area, layer, or part does not imply that the first component, area, layer, or part necessarily exists in this application.

[0046] To make the objectives, technical solutions, and advantages disclosed in the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of this application and are not intended to limit the embodiments of this application.

[0047] Please see Figure 1 , Figure 1 This is an overall schematic diagram of a noise-reducing range hood provided in an embodiment of this application. Figure 1 As shown, the noise-reducing range hood includes a first collection unit 1, a noise reduction unit 2, and a housing 3. The first collection unit 1 and the noise reduction unit 2 are both located inside the housing 3. The first collection unit 1 and the noise reduction unit 2 can both be connected to the housing 3. The housing 3 provides fixed support for the first collection unit 1 and the noise reduction unit 2.

[0048] In one possible embodiment, the first acquisition unit 1 and the noise reduction unit 2 are electrically connected, and the noise reduction unit 2 can receive the noise signal acquired by the first acquisition unit 1. Optionally, the position of the first acquisition unit 1 is adjustable. Specifically, the first acquisition unit 1 may include a positioning module and an acquisition module. The positioning module can be used to position the acquisition module, and the position of the acquisition module is adjustable. The first acquisition unit 1 is used to adjust the noise acquisition position of the first acquisition unit 1 based on the external noise of the noise-reducing range hood and acquire the comprehensive noise at a suitable noise acquisition position. The noise reduction unit 2 is used to generate and emit a noise reduction wave with an opposite phase to the comprehensive noise based on the comprehensive noise, thereby canceling out the comprehensive noise.

[0049] Specifically, most range hoods on the market include a fan installed at the top of the hood. During operation, the fan often generates a lot of noise, becoming the main noise source inside the range hood. The first acquisition unit 1 can control the adjustment of the noise acquisition position based on the identification of environmental noise, user control commands, or preset programs. After the noise acquisition position is adjusted, it acquires a comprehensive noise, including the fan noise inside the range hood and the external environmental noise flowing into the range hood. The noise reduction unit 2 can emit a noise reduction wave based on the comprehensive noise, thereby improving the noise acquisition effect and thus improving the overall noise reduction effect.

[0050] Please see Figure 2 and Figure 3 , Figure 2 This is a structural schematic diagram of a noise-reducing range hood provided in an embodiment of this application. Figure 3 This is a schematic diagram of the first data acquisition unit of a noise-reducing range hood provided in an embodiment of this application. Figure 2 and Figure 3As shown, a noise-reducing range hood on the market includes a fan installed on the top of the range hood. The first collection unit 1 may include a positioning unit 11 and a first collection component 12. The positioning unit 11 may be installed on the housing 3 and connected to the first collection component 12. The positioning unit 11 is used to drive the first collection component 12 to rise and fall, thereby adjusting the first collection component 12 to a suitable noise collection position.

[0051] In one possible embodiment, the positioning part 11 includes a drive assembly 111 and a linkage rod 112. The drive assembly 111 may include a drive motor 1111 and a lead screw 1112, which are drivenly connected. Specifically, the drive motor 1111 may include an output shaft, which may be coaxially arranged and fixedly connected to the lead screw 1112. The lead screw 1112 may be helically connected to the linkage rod 112, and when the lead screw 1112 rotates, the linkage rod 112 rises and falls. The first acquisition assembly 12 may be fixedly mounted on the linkage rod 112, and the first acquisition assembly 12 may be fixedly connected to the linkage rod 112 by means of bolt connection, welding, snap fastening, etc.

[0052] When the position of the first acquisition component 12 is adjusted, the drive motor 1111 can drive the lead screw 1112 to rotate, thereby driving the linkage rod 112 to rise and fall, thus driving the first acquisition component 12 to rise and fall, and finally adjusting the first acquisition component 12 to a suitable noise acquisition position to achieve noise acquisition.

[0053] In one possible embodiment, the positioning part 11 includes at least one lifting support slide rail 113, which can be fixedly mounted on the housing 3 and can be arranged parallel to the lead screw. The lifting support slide rail 113 can be movably connected to the linkage rod 112, and the linkage rod 112 can be provided with a movable connecting member 114 that cooperates with the lifting support slide rail 113. The movable connecting member 114 can be a slide rod, slider, or other structure corresponding to the shape of the lifting support slide rail 113.

[0054] Optionally, the linkage rod 112 can be fixedly connected to the movable connector 114, and the linkage rod 112 and the movable connector 114 can be integrated. The movable connector 114 can be movably mounted on the lifting support slide rail 113, and the movable connector 114 can slide on the lifting support slide rail 113.

[0055] Specifically, the positioning part 11 may include two lifting support slide rails 113, which may be symmetrically arranged on both sides of the lead screw 1112. The linkage rod 112 may be connected to two movable connecting parts 114, which may be symmetrically arranged at both ends of the linkage rod 112. The linkage rod 112 may be movably connected to the two lifting support slide rails 113 through the two movable connecting parts 114 respectively. In this embodiment, the lifting support slide rails 113 provide support for both sides of the linkage rod 112, preventing the linkage rod 112 from tilting due to instability of the center of gravity during the lifting process.

[0056] Optionally, the linkage rod 112 can also be detachably connected to the movable connector 114. When the movable connector 114 and the linkage rod 112 wear out during movement, only the movable connector 114 can be disassembled and replaced, thereby indirectly avoiding the wear of the linkage rod 112 and reducing subsequent maintenance costs.

[0057] In one possible embodiment, the noise-reducing range hood further includes a second acquisition unit 4, which can be fixedly mounted on the housing 3. The second acquisition unit 4 is used to acquire external noise from the noise-reducing range hood. The external noise acquired by the second acquisition unit 4 can be used to determine the noise acquisition position of the first acquisition component 12. That is, when the external noise acquired by the second acquisition unit 4 is too large, the first acquisition unit 1 is controlled to move away from the external noise source to prevent the noise acquired by the first acquisition unit 1 from being affected by the external noise source, thereby improving the noise acquisition effect of the first acquisition unit 1.

[0058] In one possible embodiment, the housing 3 includes an air inlet 31 disposed at the bottom of the housing 3, and a second collecting unit 4 is disposed adjacent to the air inlet 31. Specifically, the second collecting unit 4 may be located above the air inlet 31 and facing the air inlet 31.

[0059] In this embodiment, the air inlet 31 at the bottom of the housing 3 can be set towards the user's stove or other cooking modules. That is, at this time, the external noise source of the noise-reducing range hood is the cooking module outside the noise-reducing range hood. When the second acquisition unit 4 acquires external noise including the noise of the cooking module and the external noise is large, the first acquisition component 12 can be moved upward to move it away from the stove module located at the bottom of the noise-reducing range hood.

[0060] In one possible embodiment, the first acquisition component 12 and the second acquisition unit 4 both include at least one microphone 121, and the noise reduction unit 2 includes at least one speaker 21.

[0061] Optionally, the first acquisition component 12 may include two microphones 121, which can be used to acquire the comprehensive noise inside the noise reduction range hood. The second acquisition unit 4 may include two microphones 121, which can be used to acquire the external noise of the noise reduction range hood. The noise reduction unit 2 may include two speakers 21, which can be used to emit noise reduction waves based on the comprehensive noise acquired by the first acquisition unit 12.

[0062] In one possible embodiment, the noise-reducing range hood also includes an electronic control system. Optionally, the electronic control system can be used to receive noise reduction commands from the user.

[0063] Specifically, the noise reduction command may include instructions to turn the noise reduction mode on or off, or instructions to adjust the noise reduction mode.

[0064] Specifically, the noise reduction mode adjustment command can allow users to adopt different noise reduction schemes based on different application scenarios. For example, when the user is not performing activities such as frying or stir-frying outside the noise-reducing range hood and where there is a lot of noise, the external noise has little impact on the first acquisition component 12. The user can select the noise reduction mode as low external noise, and the first acquisition component 12 will descend. At this time, the first acquisition component 12 is located below the noise-reducing range hood and close to the noise source located below the noise-reducing range hood, thereby better realizing the comprehensive acquisition of external noise and internal noise of the noise-reducing range hood.

[0065] Optionally, when the user performs activities such as frying or stir-frying outside the noise-reducing range hood and where there is a lot of noise, the user can select the noise reduction mode as high external noise. The first acquisition component 12 is raised. At this time, the first acquisition component 12 is located above the noise-reducing range hood and away from the noise source located below the noise-reducing range hood, so as to prevent the acquisition of internal noise of the noise-reducing range hood from being affected by excessive external noise.

[0066] Optionally, the electronic control system is used to control the opening and closing of the positioning unit 11. The user can control the positioning unit 11 to open or close it through the electronic control system.

[0067] Please see Figure 4 , Figure 4 This is a flowchart illustrating a noise reduction method provided in an embodiment of this application. Figure 4 As shown, the noise reduction method may include the following specific steps:

[0068] S1: In response to the noise reduction command received through the electronic control system, activate the noise reduction mode.

[0069] In one possible embodiment, the noise-reducing range hood can activate a noise-reducing mode in response to a noise-reducing command received through the electronic control system. The noise-reducing command may include user operation commands, user preset commands, and preset program commands, etc. Specifically, the user operation commands may include commands such as different noise-reducing schemes adopted by the user based on different application scenarios, or commands to turn the noise-reducing mode on or off.

[0070] S2: During the noise reduction process, the external noise of the noise-reducing range hood is collected through the second acquisition unit.

[0071] In one possible embodiment, the noise-reducing range hood can collect external noise from the range hood through the collection device of the second collection unit 4. The external noise may include kitchen environmental noise such as cooking noise from the user and noise from the user's behavior.

[0072] S3: Determine the amplitude of external noise through the electronic control system, and determine the target position of the first acquisition component based on the amplitude of external noise.

[0073] In one possible embodiment, the noise-reducing range hood can calculate the amplitude of external noise through an electronic control system and determine the target position of the first acquisition component 12 based on the calculated amplitude of external noise.

[0074] Specifically, the electronic control system can perform a Fourier transform on the external noise sound waves acquired by the second acquisition unit 4, thereby converting the time-domain signal into a frequency-domain signal to obtain the sound pressure amplitude of the external noise. When the second acquisition unit 4 includes multiple microphones 121 for acquisition, Fourier transforms can be performed on the sound waves acquired by the multiple microphones 121 respectively to obtain multiple amplitude results, and then the average value of the multiple amplitude results can be taken to obtain the amplitude of the external noise.

[0075] Optionally, the amplitude of external noise can be determined by the electronic control system. If the amplitude of external noise is less than or equal to a first preset value, the target position is the first preset position; if the amplitude of external noise is greater than the first preset value and less than or equal to a second preset value, the target position is the second preset position; if the amplitude of external noise is greater than the second preset value, the target position is the third preset position.

[0076] The second preset position is located above the first preset position, and the third preset position is located above the second preset position. There is a first preset interval between the first and second preset positions, and a second preset interval between the second and third preset positions. Both the first and second preset intervals can be any interval between 1 cm and 100 cm, and both can be 50 cm.

[0077] When the external noise of the noise-reducing range hood changes, the optimal sampling position (i.e., the preset position) of the first sampling component 12 changes accordingly. At this time, in order to ensure the sampling effect, the first sampling component 12 should be raised or lowered to the corresponding preset position. The first preset position, the second preset position, and the third preset position provide position references for the first sampling component 12, so that the first sampling component 12 can match the most suitable sampling position under different levels of external noise.

[0078] S4: Determine the current position of the first acquisition component.

[0079] In one possible embodiment, the noise-reducing range hood can determine the current position of the first acquisition component 12 through an electronic control system. Specifically, the first acquisition component 12 may be equipped with a position sensor or other device for detecting its height or position.

[0080] S5: If there is a discrepancy between the current position and the target position, the positioning unit is controlled by the electronic control system to move the first acquisition component up and down to the target position.

[0081] In one possible embodiment, when there is a matching difference between the current position of the first acquisition component 12 and the target position of the first acquisition component 12, that is, when the current position of the first acquisition component 12 is not the target position of the first acquisition component 12, the positioning unit 11 can be controlled by the electronic control system to make the first acquisition component 12 rise and fall to the target position.

[0082] Optionally, if the current position of the first acquisition component 12 is completely matched with the target position of the first acquisition component 12, that is, the current position of the first acquisition component 12 is the target position of the first acquisition component 12, the positioning unit 11 is always closed under the control of the electronic control system, and the position of the first acquisition component 12 remains unchanged.

[0083] S6: Collect comprehensive noise through the first acquisition component.

[0084] In one possible embodiment, the overall noise can be collected by the first acquisition component 12. Specifically, the first acquisition component 12 may include a plurality of microphones 121 for acquisition, and the noise-reducing range hood can collect the overall noise inside the range hood through the plurality of microphones 121.

[0085] S7: Based on the overall noise, a noise reduction wave is emitted through the noise reduction unit.

[0086] In one possible embodiment, the noise reduction unit 2 may include a plurality of loudspeakers 21 for generating noise-reduced waves. The number of loudspeakers 21 may correspond to the number of microphones 121 in the first acquisition unit. The plurality of loudspeakers 21 can generate noise-reduced waves based on the combined noise collected by the plurality of microphones 121 in the first acquisition unit 1.

[0087] Optionally, the first acquisition unit 1 may include two microphones 121, and the noise reduction unit 2 may include two speakers 21. Each speaker 21 and each microphone 121 may correspond one-to-one, and each microphone 121 may generate a noise reduction wave with the same frequency and opposite amplitude based on the comprehensive noise acquired by the speaker 21 corresponding to each microphone 121 to achieve the noise reduction function.

[0088] When using the above-mentioned noise reduction method to reduce the overall noise inside the range hood, the electronic control system determines the amplitude of the external noise based on the external noise collected by the second acquisition unit 4 and determines the target position of the first acquisition component 12. The positioning unit 11 controls the first acquisition component 12 to rise and fall to the target position. The first acquisition component 12 collects the overall noise, and the noise reduction unit 2 emits a noise reduction wave based on the overall noise. This allows the first acquisition unit 1 to still collect the overall noise, including the fan noise of the range hood and the cooking noise of the cooking module, even when the external noise is large. This improves the noise collection effect of the range hood and enhances the noise reduction capability of the range hood.

[0089] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0090] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0091] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0092] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A noise reducing range hood characterized by, The first collecting part, the noise reduction part and the box are included. The first collecting part and the noise reduction part are located inside the box, and the first collecting part and the noise reduction part are electrically connected. The first collecting part is used to adjust the noise collecting position of the first collecting part based on the external noise of the noise reduction range hood and collect the comprehensive noise at the noise collecting position. The noise reduction part is used to emit noise reduction sound waves based on the comprehensive noise. The noise reduction range hood further includes a second collecting part, which is used to collect the external noise of the noise reduction range hood, and the external noise collected by the second collecting part is used to determine the noise collecting position of the first collecting assembly.

2. The noise reducing extractor hood according to claim 1, characterized in that The first collecting part includes a positioning part and a first collecting assembly. The positioning part is connected with the first collecting assembly, and the positioning part is used to drive the first collecting assembly to rise and fall.

3. The noise reducing extractor hood according to claim 2, characterized in that The positioning part includes a driving assembly and a linkage rod. The driving assembly includes a driving motor and a lead screw, the driving motor and the lead screw are drivingly connected, the lead screw and the linkage rod are screw-connected. The first collecting assembly is fixedly arranged on the linkage rod. When the position of the first collecting assembly is adjusted, the driving motor drives the lead screw to rotate, and then drives the linkage rod to rise and fall, so as to drive the first collecting assembly to rise and fall.

4. The noise reducing range hood according to claim 3, wherein The positioning part includes at least one lifting support sliding rail. The lifting support sliding rail is arranged parallel to the lead screw, and the lifting support sliding rail is movably connected with the linkage rod.

5. The noise reducing extractor hood according to any one of claims 2-4, characterized in that Further including a second collecting part; The second collecting part is fixedly arranged on the box, and the second collecting part is used to collect the external noise of the noise reduction range hood.

6. The noise reducing extractor hood according to claim 5, characterized in that The box includes an air inlet arranged at the bottom of the box. The second collecting part is arranged adjacent to the air inlet.

7. The noise reducing range hood according to claim 5, wherein, The first collecting assembly and the second collecting part each include at least one microphone, and the noise reduction part includes at least one loudspeaker.

8. The noise reducing range hood according to claim 2, wherein, Further including an electric control system; The electric control system is used to receive a noise reduction instruction of a user; The electric control system is used to control the opening and closing of the positioning part.

9. A method of noise reduction, characterized by, Applied to the noise reduction range hood of any one of claims 1-8, including: In response to the noise reduction instruction received by the electric control system, a noise reduction mode is started; During the noise reduction process, the external noise of the noise reduction range hood is collected by the second collecting part; The amplitude of the external noise is determined by the electric control system, and the target position of the first collecting assembly is determined according to the amplitude of the external noise; The current position of the first collecting assembly is determined; If there is a matching difference between the current position and the target position, the first collecting assembly is driven by the positioning part to the target position through the electric control system; The comprehensive noise is collected by the first collecting assembly; Based on the comprehensive noise, the noise reduction sound waves are emitted by the noise reduction part.

10. The noise reduction method of claim 9, wherein, The amplitude of the external noise is determined by the electric control system, and the target position of the first collecting assembly is determined according to the amplitude of the external noise, including: The electric control system determines the amplitude of the external noise, if the amplitude of the external noise is less than or equal to a first preset value, the target position is a first preset position; if the amplitude of the external noise is greater than the first preset value and less than or equal to a second preset value, the target position is a second preset position; if the amplitude of the external noise is greater than the second preset value, the target position is a third preset position.

Images