Range hood

Abstract

The utility model relates to a range hood technical field discloses an oil fume extractor, including the fume collecting hood, the fume collecting hood includes the fixed plate, and the oil fume extractor still includes the pickup and the mounting seat, and the mounting seat includes pickup mounting portion and the pickup hole that communicates with pickup mounting portion, and the pickup is installed in pickup mounting portion, and the mounting seat is installed on the fixed plate and the pickup hole is towards the outside of fixed plate, and the pickup hole is equipped with the pickup reflection surface, from inside to outside, and the pickup reflection surface is inclined to the direction of the center axis far from the pickup hole. The utility model discloses an oil fume extractor, through the inclination design of pickup reflection surface, the sound wave of outside is reflected and focused to the receiving area of pickup, improves the pickup efficiency to target sound source, and further improves the pickup effect. Further, the structure of the above-mentioned pickup reflection surface is simple and low in cost, and it is not necessary to additionally increase electronic noise reduction module or complex algorithm, and the pickup effect optimization can be realized only through the physical reflection surface, thereby reducing the manufacturing cost and maintenance difficulty.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a range hood for absorbing cooking oil. Background Technology

[0002] More and more range hoods on the market now come with voice control. Voice control requires a microphone, and the microphone's pickup quality is crucial for voice control.

[0003] However, the microphones installed on existing range hoods only have a flat protective net installed on the outside of the microphone, which does not optimize the microphone's sound pickup effect. Furthermore, the microphones on existing range hoods do not have a specific sound pickup effect optimization structure, so their sound pickup effect is poor and cannot guarantee the accurate execution of voice control. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a range hood that effectively solves the problem of poor sound pickup effect of the microphone on the range hood in the related technology.

[0005] The above-mentioned technical problems are solved by the following technical solutions:

[0006] A range hood includes a smoke collection hood, the smoke collection hood includes a fixed plate, the range hood also includes a microphone and a mounting base, the mounting base includes a microphone mounting part and a microphone hole communicating with the microphone mounting part, the microphone is mounted in the microphone mounting part, the mounting base is mounted on the fixed plate and the microphone hole faces the outside of the fixed plate, the microphone hole is provided with a microphone reflecting surface, from the inside to the outside, the microphone reflecting surface is inclined in a direction away from the central axis of the microphone hole.

[0007] Compared with the prior art, the range hood of this invention has the following advantages: The range hood of this invention features an inclined sound-reflecting surface within the sound-collecting hole on the mounting base. This inclined design reflects and focuses external sound waves onto the receiving area of ​​the microphone, improving the sound pickup efficiency and thus enhancing the sound pickup effect. Furthermore, the aforementioned sound-reflecting surface has a simple structure and low cost, allowing for optimized sound pickup through a physical reflective surface.

[0008] In one embodiment, the inner wall surface of the pickup hole includes the pickup reflective surface.

[0009] In one embodiment, the diameter of the pickup hole gradually increases from the inside out.

[0010] In one embodiment, the pickup hole is a conical hole, and the cone angle α of the pickup hole satisfies: 30°≤α≤60°.

[0011] In one embodiment, the microphone mounting portion is provided with a microphone mounting hole, which is coaxial with and connected to the microphone hole.

[0012] In one embodiment, the mounting base further includes an operating part connected to the microphone mounting part, the operating part being arranged around the microphone hole, and a connecting hole being provided on the fixing plate, the mounting base being installed in the connecting hole through the microphone mounting part.

[0013] In one embodiment, the outer peripheral wall of the pickup mounting part is provided with a positioning boss that is spaced apart from the operating part, and the fixing plate is provided with a positioning groove that communicates with the connecting hole and corresponds one-to-one with the positioning boss;

[0014] The positioning boss passes through the positioning groove, and by rotating the operating part, the positioning boss and the operating part respectively abut against the inner and outer sides of the fixed plate.

[0015] In one embodiment, there are two positioning bosses and two positioning slots, located on opposite sides of the microphone mounting part and the connecting hole, respectively.

[0016] In one embodiment, the outer peripheral wall of the operating part is provided with an anti-slip part, the anti-slip part including a plurality of anti-slip teeth arranged at intervals along the outer peripheral wall of the operating part.

[0017] In one embodiment, the fixing plate is the side wall of the smoke hood. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the microphone and its mounting base for a range hood according to an embodiment of the present utility model;

[0022] Figure 4 This is one of the structural schematic diagrams of a mounting base for a range hood according to an embodiment of the present utility model;

[0023] Figure 5 for Figure 4 The second schematic diagram shows the structure of a mounting base for a range hood;

[0024] Figure 6 for Figure 4 The image shows a cross-sectional view of a mounting base for a range hood.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Smoke hood; 11. Fixing plate; 111. Connecting hole; 112. Positioning groove; 2. Microphone; 201. Microphone hole; 202. Microphone reflector; 203. Microphone mounting hole; 3. Mounting base; 31. Operating part; 311. First mounting surface; 312. Anti-slip part; 313. Anti-slip teeth; 32. Microphone mounting part; 321. Positioning boss; 322. Mounting gap; 4. Microphone connecting wire; 5. Acoustic processing module. Detailed Implementation

[0027] 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 skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0029] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] like Figures 1 to 6 As shown in the accompanying drawings, the present invention provides a range hood.

[0032] According to the embodiments of this utility model, the range hood includes a smoke collection hood 1, a microphone 2, and a mounting base 3. The smoke collection hood 1 includes a fixing plate 11. The mounting base 3 includes a microphone mounting part 32 and a microphone hole 201 communicating with the microphone mounting part 32. The microphone 2 is installed in the microphone mounting part 32. The mounting base 3 is installed on the fixing plate 11 and the microphone hole 201 faces the outside of the fixing plate 11. The microphone hole 201 is provided with a sound-reflecting surface 202. From the inside to the outside, the sound-reflecting surface 202 is inclined in a direction away from the central axis of the microphone hole 201.

[0033] The specific structure of the range hood according to an embodiment of this utility model is described below:

[0034] The mounting plate 11 serves as a base for the microphone 2, providing mechanical support for it. The mounting base 3 includes a microphone mounting section 32 and a pickup hole 201. The microphone mounting section 32 accommodates the microphone 2 and serves as a fixed carrier for it. The pickup hole 201 communicates with the microphone mounting section 32, serving as an entry channel for sound waves. A sound-reflecting surface 202 is disposed within the pickup hole 201, and the sound-reflecting surface 202 is inclined from the inside out in a direction away from the central axis of the pickup hole 201, thereby optimizing the sound wave propagation path.

[0035] The mounting base 3 can be mounted on the fixing plate 11 via a mechanical fixing structure or a detachable structure. The pickup hole 201 faces the outside of the fixing plate 11, thereby ensuring that the microphone 2 can receive external sound signals. The microphone 2 is embedded in the microphone mounting part 32, and its pickup hole 201 communicates with the pickup hole 201 of the mounting base 3, thereby forming a continuous sound wave channel. The sound-reflecting surface 202 forms an inclined angle with the central axis of the pickup hole 201, and its inclined direction is away from the central axis of the pickup hole 201, so as to guide the sound waves to be focused on the sensitive area of ​​the microphone 2.

[0036] It is understandable that the sound-collecting reflector 202, through its tilted design, reflects sound waves to the sensitive area of ​​the microphone 2, thereby reducing energy attenuation caused by multiple reflections of sound waves on the inner wall of the sound-collecting hole 201. Furthermore, in high-noise environments, the sound-collecting reflector 202 can preferentially enhance the signal strength of the target sound source, thereby suppressing environmental noise.

[0037] Based on the above structure, the basic working principle of the range hood of this utility model is as follows: The sound pickup hole 201 serves as the entrance for sound waves, facing outwards from the fixed plate 11, thereby ensuring that the microphone 2 can directly receive sound signals from the external environment. The sound pickup reflector 202 is disposed within the sound pickup hole 201, tilted from the inside outwards towards the direction away from the central axis of the sound pickup hole 201. This sound pickup reflector 202 can alter the propagation path of sound waves through its geometric shape, thereby enhancing the microphone 2's ability to capture target sound sources. Specifically, the tilted design of the sound pickup reflector 202 redirects sound wave energy that might otherwise be lost due to diffusion or reflection back to the sensitive area of ​​the microphone 2. For example, in high-noise environments, the reflector can reduce interference from environmental noise while simultaneously reducing the intensity loss of the target speech.

[0038] Furthermore, the basic working process of the range hood of this utility model is as follows: When the user issues a voice command or the stove emits a target ignition sound, the sound wave first enters the mounting base 3 through the pickup hole 201. The inclined structure of the pickup reflector 202 reflects the sound wave to the sensitive area of ​​the microphone 2, reducing energy attenuation caused by multiple reflections of the sound wave on the inner wall of the pickup hole 201. When the range hood is running, the background noise generated by its motor and impeller may interfere with the normal operation of the microphone 2. However, the pickup reflector 202 can preferentially enhance the signal strength of the target sound source through its directional reflection characteristics, while suppressing noise from other directions.

[0039] In summary, the range hood of this invention features an inclined sound-reflecting surface 202 within the sound-collecting hole 201 on the mounting base 3. This inclined design reflects and focuses external sound waves onto the receiving area of ​​the microphone 2, improving the sound pickup efficiency and thus enhancing the sound pickup effect. Furthermore, the aforementioned sound-reflecting surface 202 has a simple structure and low cost, achieving optimized sound pickup through a physical reflective surface alone.

[0040] like Figures 2 to 6 As shown, according to some embodiments of the present invention, the inner wall surface of the pickup hole 201 includes a pickup and reflection surface 202.

[0041] In this embodiment, the sound-collecting reflective surface 202 is continuously distributed along the inner wall of the sound-collecting hole 201 to form a ring structure, covering the entire inner wall of the sound-collecting hole 201; that is, the entire inner wall surface of the sound-collecting hole 201 forms a surrounding sound-collecting reflective surface 202, thereby ensuring that the sound wave has no energy loss during propagation.

[0042] It is understandable that the surround-type sound-reflecting surface 202, through its continuous inclined structure, can uniformly guide sound waves from different directions to the sensitive area of ​​the microphone 2, thereby improving the coverage and sensitivity of the microphone 2. Simultaneously, the surround-type sound-reflecting surface 202 can also reduce multiple reflections and diffusion of sound waves on the inner wall of the sound-reflecting hole 201, thus suppressing interference from environmental noise. Furthermore, the inclined design of the sound-reflecting surface 202 can concentrate the reflection of high-frequency sound waves, thereby enhancing the intensity of the target speech signal.

[0043] During the actual data collection process, when the user issues a voice command or the stove emits a target ignition sound, the sound wave enters the mounting base 3 through the pickup hole 201. The surround-type pickup reflector 202, through its continuously inclined structure, evenly reflects the sound wave energy to the sensitive area of ​​the microphone 2, thereby reducing the energy attenuation caused by multiple reflections of the sound wave on the inner wall of the pickup hole 201.

[0044] Thus, this embodiment enhances the uniform guidance of sound waves by using the surround sound-reflecting surface 202, which can improve the coverage and sensitivity of the microphone 2, while reducing the interference of environmental noise and prioritizing the enhancement of the signal strength of the target sound source.

[0045] like Figure 6 As shown, further, from the inside out, the diameter of the pickup hole 201 gradually increases.

[0046] In this embodiment, the aperture of the pickup hole 201 gradually increases from the inside to the outside along its axial direction, thereby forming a conical structure, which avoids additional reflection or interference of sound waves due to abrupt changes in structure.

[0047] Understandably, the smaller aperture in the central region can more effectively focus high-frequency sound waves, enhancing the clarity of the target speech signal. Meanwhile, the gradually widening aperture in the outer region allows low-frequency sound waves to diffuse, reducing multiple reflections on the inner wall of the pickup hole 201 and lowering noise interference. Furthermore, through the aperture gradient design, the sound wave energy is dynamically adjusted during propagation, preferentially enhancing the signal strength of the target sound source while reducing background noise.

[0048] Thus, through the progressively expanding design of the pickup hole 201 and the pickup reflection surface 202, this embodiment enables the concentrated reflection of high-frequency sound waves and the suppression of low-frequency noise diffusion, thereby improving the clarity of the speech signal.

[0049] like Figure 6As shown, in some specific embodiments of this utility model, the pickup hole 201 is a tapered hole, and the tapered angle α of the pickup hole 201 satisfies: 30°≤α≤60°. That is, along the axial section of the mounting base 3, the included angle between the two opposite generatrices of the pickup hole 201 satisfies: 30°≤α≤60°.

[0050] It should be explained that when the cone angle α = 30°, the sound wave reflection path is closer to the central axis of the pickup hole 201, which is suitable for concentrating high-frequency sound waves. This can enhance the strength of the speech signal and reduce multiple reflections of sound waves on the inner wall of the pickup hole 201, thereby reducing noise interference. As can be seen, a 30° cone angle provides better wavelength matching for high-frequency sound waves, improving sound clarity.

[0051] When the cone angle α = 60°, the sound wave reflection path is more dispersed, covering a wider range of sound source directions, thus adapting to scenarios with offset sound source locations or multiple people speaking. The selection of the cone angle mentioned above can improve the microphone 2's ability to resist environmental noise by expanding the reflection range. As can be seen above, a 60° cone angle has lower reflection efficiency for low-frequency sound waves, dispersing their energy and thus reducing interference.

[0052] It should be noted that, by testing the impact of different cone angles on sound pickup performance, such as 20°, 30°, 45°, 60°, and 70°, the researchers found that the speech recognition accuracy of microphone 2 can reach its optimal level within the range of 30° to 60°.

[0053] In summary, a cone angle range of 30° to 60° can balance high-frequency sound wave focusing with low-frequency noise suppression, thereby improving speech recognition accuracy. Furthermore, the 30° to 60° cone angle range can also accommodate sound waves of different frequency ranges, thus improving the applicability of the microphone 2 in complex environments. (The interior is used to house and fix the microphone 2.)

[0054] The axis of the pickup mounting hole 203 is aligned with the axis of the pickup hole 201, forming a coaxial sound wave channel. That is, the pickup mounting hole 203 and the pickup hole 201 are located on the same central axis, ensuring the straightness and consistency of the sound wave propagation path. The two are directly connected, allowing external sound signals to enter the pickup mounting hole 203 through the pickup hole 201 and ultimately reach the pickup 2.

[0055] In this way, the microphone mounting hole 203 provides installation space for the microphone 2, and the coaxial design avoids energy loss caused by path deviation or deflection during sound wave propagation, thereby improving sound pickup efficiency and helping the microphone 2 to achieve more accurate sound source localization and speech recognition.

[0056] like Figures 2 to 6As shown, according to some embodiments of the present invention, the mounting base 3 further includes an operation part 31 connected to the microphone mounting part 32. The operation part 31 is arranged around the microphone hole 201. The fixing plate 11 has a connection hole 111. The mounting base 3 is installed in the connection hole 111 through the microphone mounting part 32.

[0057] In this embodiment, the operating part 31 is connected to the microphone mounting part 32, and the two together constitute the mounting base 3. The operating part 31 is arranged around the microphone hole 201, thereby forming a structural area that is convenient for user operation or positioning. The microphone mounting part 32 includes a microphone mounting hole 203 and is integrally connected to the operating part 31. The microphone mounting part 32 is embedded in the connection hole 111 on the fixing plate 11. The connection hole 111 is provided on the fixing plate 11 to accommodate the microphone mounting part 32 of the mounting base 3, and its shape and size match the mounting part, thereby ensuring stable installation and accurate alignment.

[0058] The installation process of mounting base 3 is roughly as follows: Mounting base 3 is assembled by inserting its pickup mounting part 32 into the connecting hole 111 on the fixing plate 11. The operating part 31 is located on the outside of the fixing plate 11 and serves to limit, operate, and assist in fixing.

[0059] It is understood that the microphone mounting part 32, as the main insertion part, forms a tight fit with the connecting hole 111 on the fixing plate 11. After insertion, the mounting base 3 is reliably fixed on the fixing plate 11, while maintaining communication between the microphone hole 201 and the external environment. In this way, the mounting base 3 adopts an insertion installation method, saving internal space and making the range hood structure more compact. At the same time, the connecting hole 111 on the fixing plate 11 serves a dual function of positioning and support, simplifying the installation structure.

[0060] like Figures 2 to 6 As shown, in some specific embodiments, the outer peripheral wall of the pickup mounting part 32 is provided with a positioning boss 321 spaced apart from the operation part 31, and the fixing plate 11 is provided with a positioning groove 112 that communicates with the connecting hole 111 and corresponds one-to-one with the positioning boss 321.

[0061] The positioning boss 321 passes through the positioning groove 112 and is rotated by the operating part 31 so that the positioning boss 321 and the operating part 31 abut against the inner and outer sides of the fixing plate 11 respectively.

[0062] In this embodiment, a positioning boss 321 is provided on the outer peripheral wall of the microphone mounting part 32, and a positioning groove 112 communicating with the mounting hole is provided on the fixing plate 11. A first mounting surface 311 is formed on the side surface of the operating part 31 facing the fixing plate 11. The positioning boss 321 and the first mounting surface 311 are spaced apart and a mounting gap 322 is formed. The mounting part is rotatably set in the mounting hole to switch to the mounting state. In the mounting state, the inner and outer side surfaces of the fixing plate 11 abut against the positioning boss 321 and the first mounting surface 311 respectively, and the fixing plate 11 is clamped in the mounting gap 322.

[0063] Specifically, the installation process of the mounting base 3 is as follows: Align the microphone mounting part 32 of the mounting base 3 with the connecting hole 111 of the fixing plate 11, and align the positioning boss 321 with the positioning groove 112. During insertion, the positioning boss 321 slides into the positioning groove 112, the operating part 31 does not rotate, and the installation gap 322 is greater than the thickness of the fixing plate 11. The user rotates the operating part 31, which drives the microphone mounting part 32 to rotate together, and the positioning boss 321 slides along the circumference of the connecting hole 111. As the rotation angle changes, the positioning boss 321 and the positioning groove 112 are misaligned, so that the fixing plate 11 fits within the installation gap 322. At this time, the first mounting surface 311 abuts against the outer side of the fixing plate 11, and the positioning boss 321 abuts against the inner side, thereby forming a stable clamping force on the fixing plate 11. At this time, due to the locking effect of the positioning boss 321 and the first mounting surface 311, the microphone mounting part 32 cannot move axially, thereby achieving a firm fixation.

[0064] In this way, the above-mentioned fixing method eliminates the need for additional fasteners, saving space and improving the overall integration of the machine. It is also convenient and efficient to operate, as installation and disassembly can be completed simply by rotation, facilitating maintenance, cleaning, and replacement. Furthermore, the double-sided clamping design effectively suppresses loosening caused by vibration.

[0065] like Figures 2 to 6 As shown, there are two positioning bosses 321 and two positioning slots 112, located on opposite sides of the microphone mounting part 32 and the connecting hole 111, respectively.

[0066] In this embodiment, there are two positioning bosses 321 and two positioning grooves 112. The two positioning bosses 321 are located at both ends of the mounting part along its diameter direction, and correspondingly, the two positioning grooves 112 are located at both ends of the mounting hole along its diameter direction.

[0067] It is understandable that the two sets of positioning bosses 321 and positioning grooves 112 are arranged in a centrally symmetrical manner to ensure that the mounting seat 3 is subjected to uniform force during rotation, thereby improving the stability and consistency of the rotation locking action, and avoiding the mounting seat 3 from tilting or jamming due to force on one side.

[0068] like Figures 2 to 6 As shown, according to some embodiments of the present invention, the outer peripheral wall of the operating part 31 is provided with an anti-slip part 312, and the distance between the operating part 31 and the positioning boss 321 is matched with the thickness of the fixing plate 11.

[0069] In this embodiment, the anti-slip part 312 is disposed on the outer peripheral wall surface of the operating part 31 to improve the user's feel and grip during operation. The anti-slip part 312 can take various forms, such as using stripes, dots, waves, or other textured patterns; or, the anti-slip part 312 can be a rubber coating layer; or, the anti-slip part 312 can be an anti-slip rib or anti-slip groove. All of the above structures can prevent slippage during operation, thereby ensuring precise execution of the rotational action.

[0070] The distance between the operating part 31 and the positioning boss 321 is the distance from the first mounting surface 311 to the bottom of the positioning boss 321, which is equal to or slightly greater than the thickness of the fixing plate 11. In this way, it can be ensured that when the mounting base 3 is inserted into the connecting hole 111 and rotated to lock, the fixing plate 11 is clamped between the operating part 31 and the positioning boss 321, forming a stable mechanical clamping structure.

[0071] This anti-slip design effectively prevents slippage when the user rotates the operating part 31, thereby improving assembly efficiency and reducing the installation failure rate caused by improper operation. Furthermore, the distance between the operating part 31 and the positioning boss 321 matches the thickness of the fixing plate 11, making the clamping structure more closely conform to the actual physical dimensions, thus avoiding problems of clamping too tightly or too loosely.

[0072] like Figure 4 As shown, in some specific embodiments, the anti-slip portion 312 includes a plurality of anti-slip teeth 313 arranged at intervals along the outer peripheral wall of the operating portion 31.

[0073] like Figure 1 As shown, according to some embodiments of the present invention, the fixing plate 11 is the side wall of the smoke collection hood 1.

[0074] Furthermore, an acoustic processing module 5 is also provided on the front panel of the smoke hood 1, and the acoustic processing module 5 is connected to the microphone 2 through the microphone connection line 4.

[0075] It is understood that in this embodiment, the pickup hole 201 is no longer located directly in front of the smoke hood 1 or near the smoke inlet, but is instead arranged on the side wall area of ​​the smoke hood 1. This area is relatively far away from the oil fume airflow channel, reducing the risk of oil fumes, water vapor, and other pollutants directly contacting the pickup hole 201. In this way, arranging the pickup hole 201 on the side wall away from the smoke inlet and smoke chamber can effectively avoid highly polluted areas and reduce the probability of the microphone 2 being contaminated.

[0076] Furthermore, as mentioned above, since the pickup hole 201 has a horn-shaped structure that is smaller on the inside and larger on the outside, that is, the outer opening is larger and gradually narrows towards the inside, the horn-shaped structure not only helps to expand the pickup range, but also has a certain physical isolation effect, reducing the possibility of oil fume particles entering the hole vertically.

[0077] In this way, by installing the mounting base 3 on the side wall, the pickup hole 201 can be kept away from the smoke inlet and oil fumes, preventing oil fumes from entering the pickup hole 201 and affecting the normal operation of the microphone 2. Furthermore, the horn-shaped design of the pickup hole 201 can further prevent oil fumes from entering.

[0078] Furthermore, the acoustic processing module 5 can perform noise reduction, enhancement, and filtering on the speech signal collected by the microphone 2 in real time, significantly improving the accuracy of speech recognition.

[0079] In actual use, the range hood is initially in standby mode, and the acoustic processing module 5 continuously monitors external voice signals. When the user issues voice commands such as "start" or "stop," or when the stove emits a target ignition sound (a specific frequency "buzzing"), the sound waves enter the pickup hole 201 and are guided by the reflector surface before being collected by the microphone 2. The microphone 2 transmits the analog signal to the acoustic processing module 5 via a connecting cable. The acoustic processing module 5 performs noise suppression and voice enhancement, thereby outputting high-quality voice data. The main control system receives the processed voice data, and after determining that it is a valid command, executes the corresponding operation, such as starting the fan or adjusting the airflow.

[0080] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0081] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A range hood, comprising a smoke collection hood (1), said smoke collection hood (1) including a fixing plate (11), characterized in that, It also includes a microphone (2) and a mounting base (3). The mounting base (3) includes a microphone mounting part (32) and a pickup hole (201) communicating with the microphone mounting part (32). The microphone (2) is installed in the microphone mounting part (32). The mounting base (3) is installed on the fixing plate (11) and the pickup hole (201) faces the outside of the fixing plate (11). The pickup hole (201) is provided with a pickup reflection surface (202). From the inside to the outside, the pickup reflection surface (202) is inclined in a direction away from the central axis of the pickup hole (201).

2. The range hood according to claim 1, characterized in that, The inner wall surface of the pickup hole (201) includes the pickup reflection surface (202).

3. The range hood according to claim 2, characterized in that, From the inside out, the diameter of the pickup hole (201) gradually increases.

4. The range hood according to claim 3, characterized in that, The pickup hole (201) is a conical hole, and the cone angle α of the pickup hole (201) satisfies: 30°≤α≤60°.

5. The range hood according to claim 1, characterized in that, The pickup mounting part (32) is provided with a pickup mounting hole (203), which is coaxial and connected with the pickup hole (201).

6. The range hood according to any one of claims 1 to 5, characterized in that, The mounting base (3) also includes an operating part (31) connected to the microphone mounting part (32). The operating part (31) is arranged around the microphone hole (201). The fixing plate (11) has a connecting hole (111). The mounting base (3) is installed in the connecting hole (111) through the microphone mounting part (32).

7. The range hood according to claim 6, characterized in that, The outer peripheral wall of the pickup mounting part (32) is provided with a positioning boss (321) spaced apart from the operation part (31), and the fixing plate (11) is provided with a positioning groove (112) that communicates with the connecting hole (111) and corresponds one-to-one with the positioning boss (321). The positioning boss (321) passes through the positioning groove (112) and the operating part (31) is rotated so that the positioning boss (321) and the operating part (31) abut against the inner and outer sides of the fixing plate (11) respectively.

8. The range hood according to claim 7, characterized in that, The number of the positioning boss (321) and the positioning groove (112) are both two, located on opposite sides of the pickup mounting part (32) and the connecting hole (111), respectively.

9. The range hood according to claim 7, characterized in that, The outer peripheral wall of the operating part (31) is provided with an anti-slip part (312), which includes a plurality of anti-slip teeth (313) arranged at intervals along the outer peripheral wall of the operating part (31).

10. The range hood according to any one of claims 1 to 5, characterized in that, The fixing plate (11) is the side wall of the smoke collection hood (1).

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