Range hood with directional audio injection function and control method thereof

Abstract

The embodiment of the invention discloses a range hood with directional audio injection and a control method thereof. The range hood comprises a controller and an audio injection module, wherein the controller is electrically connected with the audio injection module; the controller is used for controlling the audio injection module to play the ultrasonic signals with the at least two preset frequencies so as to form a first audio injection signal in a preset area, the first audio injection signal is a difference frequency signal of the ultrasonic signals with the at least two preset frequencies, and the frequency of the difference frequency signal is located in an audible sound frequency range. According to the embodiment of the invention, the acoustic directional propagation technology is adopted, directional playing of the audio injection sound is realized for the cook, the attention of the user can be effectively distracted, and the negative effect of the noise of the range hood on the emotion of the user is improved, so that the noise experience effect of the cook in the cooking process is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of kitchen appliances, and in particular to a range hood with directional audio injection and a control method thereof. Background Art

[0002] To remove cooking fumes, kitchens often use range hoods. These range hoods incorporate a fan that creates negative pressure, drawing air from the cooking area and the fumes outdoors. However, this fan generates vibrations during operation, creating a lot of noise that can affect the user's cooking experience.

[0003] Noise reduction technology in the kitchen appliance industry initially focused on passive noise reduction, using sound-absorbing materials to reduce passive noise. This focus has gradually shifted to improving sound quality through acoustic technology. Currently, the mainstream active sound control technologies include active noise reduction and audio injection, which achieve noise reduction or audio injection effects through audio playback. However, existing audio playback methods are relatively fixed, resulting in excessive noise throughout the kitchen during cooking, which fails to provide users with a more accurate active sound control experience. Summary of the Invention

[0004] The present invention provides a range hood with directional audio injection and a control method thereof, which uses acoustic directional propagation technology to achieve directional playback of audio injection sound for cooks, thereby improving the cooks' noise experience during the cooking process.

[0005] In a first aspect, an embodiment of the present invention provides a range hood with directional audio injection, comprising a controller and an audio injection module, wherein the controller is electrically connected to the audio injection module;

[0006] The controller is used to control the audio injection module to play ultrasonic signals of at least two preset frequencies to form a first audio injection signal in a predetermined area. The first audio injection signal is a difference frequency signal of the ultrasonic signals of at least two preset frequencies, and the frequency of the difference frequency signal is within the audible sound frequency range.

[0007] Optionally, the audio injection module includes at least two ultrasonic transducers, and the controller is electrically connected to the at least two ultrasonic transducers respectively;

[0008] The controller is used to send corresponding ultrasonic frequency band electrical signals to each ultrasonic transducer respectively;

[0009] At least two ultrasonic transducers are respectively used to convert the corresponding received ultrasonic frequency band electrical signals into ultrasonic signals of corresponding preset frequencies and output them in a preset direction, so that the ultrasonic signals of at least two preset frequencies form a difference frequency signal in a predetermined area.

[0010] Optionally, the controller is further configured to control the audio injection module to play a second audio injection signal, where the frequency of the second audio injection signal is within the audible sound frequency range.

[0011] Optionally, the audio injection module further includes at least one speaker, and the controller is electrically connected to the at least one speaker;

[0012] The controller is used to send corresponding audible sound frequency band electrical signals to each speaker respectively;

[0013] The at least one loudspeaker is used to convert the corresponding received electrical signal in the audible frequency band into a second audio injection signal for output.

[0014] Optionally, it also includes a main box and a fume hood;

[0015] The smoke collecting hood is arranged below the main box and is connected to the main box, and a smoke inlet is arranged on the front side of the smoke collecting hood;

[0016] The audio injection module is fixed under the main chassis and located in front of the smoke hood.

[0017] In a second aspect, an embodiment of the present invention further provides a range hood control method with directional audio injection, which is applied to a range hood provided in any embodiment of the present invention; the range hood control method comprises:

[0018] Determine whether to enable audio injection mode;

[0019] Upon receiving the audio injection mode start instruction, determining whether to start the audio injection exclusive mode;

[0020] When an instruction to start the audio injection exclusive mode is received, the audio injection module is controlled to play ultrasonic signals of at least two preset frequencies to form a first audio injection signal in a predetermined area; wherein the first audio injection signal is a difference frequency signal of the ultrasonic signals of at least two preset frequencies, and the frequency of the difference frequency signal is within the audible sound frequency range.

[0021] Optionally, after determining whether to enable the audio injection mode, upon receiving the audio injection exclusive mode enabling instruction, before controlling the audio injection module to play ultrasonic signals of at least two preset frequencies, the method further includes:

[0022] When the audio injection mode start instruction is received, the audio injection module is controlled to play a second audio injection signal; wherein the frequency of the second audio injection signal is within the audible sound frequency range.

[0023] Optionally, upon receiving the audio injection mode activation instruction, after determining whether to activate the audio injection exclusive mode, the method further includes:

[0024] When the audio injection exclusive mode start instruction is not received, the audio injection module is controlled to continue playing the second audio injection signal.

[0025] Optionally, before determining whether to enable the audio injection mode, the method further includes:

[0026] Confirm that the range hood start command has been received.

[0027] Optionally, after confirming receipt of the range hood start instruction, the method further includes:

[0028] Control the range hood to start normally.

[0029] An embodiment of the present invention sets a controller and an audio injection module in the range hood, and the controller is electrically connected to the audio injection module; the controller is used to control the audio injection module to play ultrasonic signals of at least two preset frequencies to form a first audio injection signal in a predetermined area. The first audio injection signal is a difference frequency signal of ultrasonic signals of at least two preset frequencies, and the frequency of the difference frequency signal is within the audible sound frequency range. By adopting acoustic directional propagation technology, directional playback of audio injection sound is achieved for the cook, which can effectively divert the user's attention and improve the negative effect of the range hood noise on the user's emotions, thereby improving the noise experience of the cook during the cooking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a smoke extractor with directional audio injection provided by an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the acoustic directional propagation principle of the audio injection module provided by an embodiment of the present invention;

[0032] Figure 3 This is a flow chart of a method for controlling a range hood with directional audio injection provided by an embodiment of the present invention;

[0033] Figure 4 This is a flow chart of another method for controlling a range hood with directional audio injection provided by an embodiment of the present invention;

[0034] Figure 5 This is a control logic diagram of a range hood with directional audio injection provided by an embodiment of the present invention;

[0035] In the figure: 10 - audio injection module, 11 - ultrasonic transducer, 20 - main chassis, 30 - smoke hood, 31 - smoke inlet. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0037] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is formed "on" or "under" another element, it can not only be formed directly "on" or "under" another element, but can also be formed indirectly "on" or "under" another element through an intermediate element. The terms "first", "second", etc. are only used for descriptive purposes and do not indicate any order, quantity or importance, but are only used to distinguish different components. 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 circumstances.

[0038] The term "including" and its variations used in the present invention are open inclusions, that is, "including but not limited to." The term "based on" means "based at least in part on." The term "one embodiment" means "at least one embodiment."

[0039] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish the corresponding contents, and are not used to limit the order or mutual dependence.

[0040] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0041] Figure 1 This is a schematic diagram of the structure of a smoke machine with directional audio injection provided by an embodiment of the present invention, with reference to Figure 1 The range hood with directional audio injection includes a controller (not shown in the figure) and an audio injection module 10, and the controller is electrically connected to the audio injection module 10; the controller is used to control the audio injection module 10 to play at least two ultrasonic signals of preset frequencies to form a first audio injection signal in a predetermined area, and the first audio injection signal is a difference frequency signal of the ultrasonic signals of at least two preset frequencies, and the frequency of the difference frequency signal is within the audible sound frequency range.

[0042] In an embodiment of the present invention, the range hood further includes a main box 20 and a smoke collection hood 30; the smoke collection hood 30 is arranged below the main box 20 and is connected to the main box 20, and a smoke inlet 31 is provided on the front side of the smoke collection hood 30; the audio injection module 10 can be fixed below the main box 20 and is located in front of the smoke collection hood 30.

[0043] Among them, the audio injection module 10 is an audio output module that actively plays music, bird calls, running water and other audio into the kitchen space to realize audio injection. Audio injection can divert the user's attention and improve the negative effect of the range hood noise on the user's mood. The controller is responsible for regulating the audio injection module 10 and providing the audio injection module 10 with corresponding electrical signals. The audio injection module 10 is responsible for converting the received electrical signals into corresponding sound wave signals for playback. In this embodiment, the audio injection module 10 can emit at least two sound wave signals of preset frequencies in the form of ultrasonic waves according to the electrical signals provided by the controller. The sound wave signals of the two preset frequencies will produce nonlinear interactions in space, generate difference frequency signals in the audible sound frequency range, and be heard by the user in the directional position to form a first audio injection signal.

[0044] Specifically, Figure 2 This is a schematic diagram of the acoustic directional propagation principle of the audio injection module provided by an embodiment of the present invention, and the following reference Figure 2 , the acoustic directional propagation principle of the audio injection module 10 of the embodiment of the present invention is explained as follows: wherein, an ultrasonic transducer 11 is provided in the audio injection module 10, which serves as an energy conversion device and plays the role of signal transmission. Specifically, the controller sends two electrical signals to the audio injection module 10, and the ultrasonic transducer 11 is responsible for converting the two electrical signals into two ultrasonic signals. The two electrical signals sent by the controller are used to generate ultrasonic signals of two frequencies, so they can be called ultrasonic frequency band electrical signals, such as Figure 2 As shown, the electrical signals of the two ultrasonic frequency bands can be represented by f1 and f2 respectively. At the same time, the two ultrasonic signals converted and output by the ultrasonic transducer 11 have different preset frequencies, which are also represented by f1 and f2. When the two ultrasonic signals propagate and diffuse in a medium such as air, nonlinear interactions will occur. In a nonlinear medium, the propagation of the wave will cause the waveform to be distorted due to the nonlinearity of the physical properties of the cutoff, such as elasticity, density, etc., and then generate harmonics and combined frequency components. When two waves with different frequencies propagate in the medium at the same time, due to the nonlinear interaction, Figure 2 The sum and difference frequency phenomena shown in Figure 1 indicate that, in addition to the ultrasonic signals at frequencies f1 and f2, a sum frequency signal (f1 + f2) and a difference frequency signal (f1 - f2) are also generated. The difference frequency signal's acoustic beam is more focused and has a distinct specificity, thus achieving directional propagation toward a predetermined area.

[0045] Furthermore, it should be noted that the two ultrasonic frequency band electrical signals sent by the controller are not fixed-frequency electrical signals; they merely indicate that the two ultrasonic frequency band electrical signals are different. Ultrasonic signals of different frequencies can be played through the ultrasonic transducer 11. In actual applications, the frequencies of the two ultrasonic signals will change over time. Because the two ultrasonic signals of different frequencies form a difference frequency signal in a predetermined region, the controller can properly modulate the output electrical signal, not only ensuring that the frequency of the difference frequency signal conforms to the audible frequency range, i.e., audible to the human ear, but also allowing the two ultrasonic signals, whose frequencies vary over time, to form a difference frequency signal of the same frequency that varies over time, thereby generating a specific audio injection sound, such as music, bird song, or running water, forming the first audio injection signal.

[0046] In the above embodiment, a controller and an audio injection module are set in the range hood, and the controller is electrically connected to the audio injection module; the controller is used to control the audio injection module to play ultrasonic signals of at least two preset frequencies to form a first audio injection signal in a predetermined area. The first audio injection signal is a difference frequency signal of ultrasonic signals of at least two preset frequencies. The frequency of the difference frequency signal is within the audible sound frequency range. By adopting acoustic directional propagation technology, directional playback of audio injection sound is achieved for the cook, which can effectively divert the user's attention and improve the negative effect of the range hood noise on the user's emotions, thereby improving the noise experience of the cook during the cooking process.

[0047] In an optional embodiment, the audio injection module 10 may include at least two ultrasonic transducers 11, and the controller is electrically connected to the at least two ultrasonic transducers 11 respectively; the controller is used to send corresponding ultrasonic frequency band electrical signals to each ultrasonic transducer 11 respectively; the at least two ultrasonic transducers 11 are used to convert the corresponding received ultrasonic frequency band electrical signals into ultrasonic signals of corresponding preset frequencies and output them in a preset direction, so that the ultrasonic signals of at least two preset frequencies form a difference frequency signal within a predetermined area.

[0048] In this embodiment, at least two ultrasonic transducers 11 are provided, meaning that each ultrasonic transducer can be individually controlled by a controller. Specifically, the controller transmits a modulated electrical signal of the corresponding ultrasonic frequency band to each ultrasonic transducer 11, and each ultrasonic transducer 11 is solely responsible for converting the received ultrasonic frequency band electrical signal into an ultrasonic signal of the corresponding preset frequency. It should be noted that the formation of a difference frequency signal in a predetermined area depends not only on the frequency of the ultrasonic signal modulated by the controller but also on the direction in which the ultrasonic transducer 11 transmits the ultrasonic wave. In other words, the ultrasonic wave installation orientation must be simultaneously set so that each ultrasonic transducer 11 outputs an ultrasonic signal in a predetermined direction, generating nonlinear interactions in space and forming a difference frequency signal in the predetermined area.

[0049] In an optional embodiment, the controller may be further configured to control the audio injection module 10 to play a second audio injection signal, where the frequency of the second audio injection signal is within the audible sound frequency range.

[0050] This embodiment indicates that the audio injection module 10 can also directly output a sound signal with a frequency within the audible frequency range based on the electrical signal provided by the controller. In other words, the second audio injection signal is directly played by the audio injection module 10. It will be understood that the difference between the second audio injection signal and the first audio injection signal here is only the difference in the formation method. The second audio injection signal can be the same audio injection sound, such as music, birdsong, flowing water, etc.

[0051] Therefore, further, the audio injection module 10 can be configured to further include at least one speaker, and the controller can be electrically connected to the at least one speaker; the controller is configured to send corresponding audible sound frequency band electrical signals to each speaker respectively; and the at least one speaker is configured to convert the corresponding received audible sound frequency band electrical signals into second audio injection signals for output.

[0052] The speaker here is also an energy conversion device, serving as a signal transmitter. However, unlike the ultrasonic transducer 11, it is responsible for emitting audible sound wave signals. Specifically, it is responsible for converting the audible frequency band electrical signal provided by the controller into a second audio injection signal in the audible frequency band for playback. The audio injection module 10 here is responsible for broadcasting the sound wave signal to the entire kitchen space, without requiring any direction. Therefore, it only needs to ensure that the sound wave signal can propagate or cover the entire kitchen space. Therefore, there is no excessive restriction on the number of speakers provided.

[0053] With respect to the above-mentioned range hood with directional audio injection, an embodiment of the present invention further provides a range hood control method. Figure 3 This is a flow chart of a method for controlling a range hood with directional audio injection provided by an embodiment of the present invention. Figure 1 and Figure 3 First, as described in the above embodiment, the range hood has an audio injection module 10. The range hood control method can be executed by a controller. Specifically, the control method includes:

[0054] S110: Determine whether to enable the audio injection mode.

[0055] Among them, the audio injection mode means that the range hood generates noise during operation while performing audio injection actions, actively playing music, bird calls, running water and other audio, forming an audio injection scene for the user during the cooking process, diverting the user's attention, and improving the negative effect of the range hood noise on the user's emotions.

[0056] S120: Upon receiving the audio injection mode activation instruction, determine whether to activate the audio injection exclusive mode.

[0057] The audio injection mode activation command means that the user interacts with the range hood through buttons, touch, gestures, etc., and sends an operation signal to the range hood to activate the audio injection mode. Based on this operation signal, the range hood can determine whether the user has a need for audio injection. The audio injection exclusive mode means that the user also interacts with the range hood through buttons, touch, gestures, etc., and sends an operation signal to the range hood to activate the audio injection exclusive mode. Based on this operation signal, the range hood can determine whether the user has a need for directional audio injection. Therefore, this step is essentially a process of further confirming whether directional audio injection is required based on confirming that the user has a need for audio injection through interaction between the user and the range hood.

[0058] S130. When receiving an instruction to start the audio injection exclusive mode, control the audio injection module to play ultrasonic signals of at least two preset frequencies to form a first audio injection signal in a predetermined area; wherein the first audio injection signal is a difference frequency signal of the ultrasonic signals of at least two preset frequencies, and the frequency of the difference frequency signal is within the audible sound frequency range.

[0059] This step involves executing the directional audio injection operation after confirming the user's need for directional audio injection through interaction with the range hood. As previously described, the range hood of this embodiment provides a corresponding electrical signal to the audio injection module 10 via the controller, controlling the audio injection module 10 to play an ultrasonic signal. The nonlinear effects of the medium then generate a first audio injection signal audible to the human ear in a predetermined area. The specific operating principles of this operation are not further elaborated here.

[0060] The range hood control method provided in this embodiment first determines whether the audio injection mode is turned on, then determines whether the audio injection exclusive mode is turned on when receiving the audio injection mode turn-on instruction, and finally controls the audio injection module to play at least two ultrasonic signals of preset frequencies when receiving the audio injection exclusive mode turn-on instruction to form a first audio injection signal in a predetermined area. By adopting acoustic directional propagation technology, directional playback of audio injection sound is achieved for the cook, which can effectively divert the user's attention and improve the negative effect of range hood noise on the user's emotions, thereby improving the noise experience of the cook during the cooking process.

[0061] Figure 4 This is a flowchart of another method for controlling a range hood with directional audio injection provided by an embodiment of the present invention. Figure 4 Further, based on the above embodiment, after determining whether to enable the audio injection mode at S110, and before controlling the audio injection module to play ultrasonic signals of at least two preset frequencies at S130 upon receiving the audio injection exclusive mode enable instruction, the range hood control method may further include the following steps:

[0062] When the audio injection mode start instruction is received, the audio injection module is controlled to play a second audio injection signal; wherein the frequency of the second audio injection signal is within the audible sound frequency range.

[0063] For details not yet provided in this embodiment, please refer to the previous embodiment.

[0064] like Figure 4 As shown, this embodiment provides a range hood control method with directional audio injection, comprising the following steps:

[0065] S2101: Determine whether to enable audio injection mode.

[0066] S220: Upon receiving the audio injection mode activation instruction, determine whether to activate the audio injection exclusive mode.

[0067] S221 . Upon receiving an audio injection mode start instruction, control the audio injection module to play a second audio injection signal; wherein the frequency of the second audio injection signal is within the audible sound frequency range.

[0068] S2301. When receiving an instruction to start the audio injection exclusive mode, control the audio injection module to play ultrasonic signals of at least two preset frequencies to form a first audio injection signal in a predetermined area; wherein the first audio injection signal is a difference frequency signal of the ultrasonic signals of at least two preset frequencies, and the frequency of the difference frequency signal is within the audible sound frequency range.

[0069] Among them, for S221, this step refers to controlling the audio injection module to directly play an audio injection signal audible to the human ear, i.e., the second audio injection signal, through the controller, and temporarily not considering the audio injection mode of directional playback. Moreover, it can be understood that this step is essentially a step that is performed simultaneously with the step of determining whether to turn on the audio injection exclusive mode in S220 and confirming whether the user has the need for directional audio playback. Thus, when it is confirmed that the user has an audio injection demand, the audio injection function can be provided in a timely manner to build an audio injection scenario for the user.

[0070] Continue to refer Figure 4 Furthermore, based on the above embodiment, in S220, upon receiving the audio injection mode start instruction, after determining whether to start the audio injection exclusive mode, the range hood control method may further include the following steps:

[0071] S2302: When no audio injection exclusive mode start instruction is received, control the audio injection module to continue playing the second audio injection signal.

[0072] This step is performed when the range hood receives the audio injection mode activation command, confirms the user's audio injection request, and then determines whether the user has requested directional audio injection. If no user's intention to use directional audio injection is detected during the process, this step ensures that the second audio injection signal continues to play after confirming the user's audio injection request.

[0073] Continue to refer Figure 4 Furthermore, based on the above embodiment, before S2101, determining whether to enable the audio injection mode, the range hood control method further includes:

[0074] S200: Confirm receipt of the range hood start instruction.

[0075] Furthermore, after confirming receipt of the range hood start instruction in S200, the range hood control method further includes:

[0076] S2102: When no audio injection mode start instruction is received, the range hood is controlled to start normally.

[0077] S2102 refers to the process of activating the range hood for smoke exhaust after the user activates it, before, after, or during the process of determining whether the user has enabled audio injection mode. This step, along with S2101, the process of determining whether audio injection mode is enabled, essentially involves independently controlling the range hood's fume extraction and noise reduction functions. The two functions may be unrelated.

[0078] In order to clearly illustrate the interaction process of the range hood in actual application according to the embodiment of the present invention, a complete set of program interaction logic of the range hood is now provided. Figure 5 This is a control logic diagram of a range hood with directional audio injection provided by an embodiment of the present invention, refer to Figure 5 As mentioned above, the range hood provided in this embodiment has an audio injection mode and an audio injection exclusive mode, which involves an active interaction process with the user, and determines whether the above two modes are activated based on the user's wishes. Specifically:

[0079] S31. When the user starts the range hood, a user determination program is started;

[0080] S32, performing a first-layer logic determination, i.e., determining whether to start the audio injection mode; at this point, a user may intervene to determine, i.e., operate to select a mode;

[0081] S321. When the user selects "yes", start the audio injection exclusive mode determination;

[0082] S332: When the user selects "No", the range hood starts normally until the range hood is shut down;

[0083] S33, the second layer logic determines whether to start the audio injection exclusive mode; at this time, the user will also intervene to determine, that is, operate to select the mode (not shown in the figure);

[0084] S331. When the user further selects "Yes", the audio injection exclusive mode is turned on until it ends;

[0085] S332: When the user further selects “No”, the audio injection mode is maintained until the end.

[0086] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A range hood with directional audio injection, characterized in that: It comprises a controller and an audio injection module (10), wherein the controller is electrically connected to the audio injection module (10); The controller is used to control the audio injection module (10) to play ultrasonic signals of at least two preset frequencies to form a first audio injection signal in a predetermined area, wherein the first audio injection signal is a difference frequency signal of the ultrasonic signals of the at least two preset frequencies, and the frequency of the difference frequency signal is within the audible sound frequency range.

2. The range hood according to claim 1, characterized in that: The audio injection module (10) comprises at least two ultrasonic transducers (11), and the controller is electrically connected to the at least two ultrasonic transducers (11) respectively; The controller is used to send corresponding ultrasonic frequency band electrical signals to each of the ultrasonic transducers (11); The at least two ultrasonic transducers (11) are respectively used to convert the corresponding received ultrasonic frequency band electrical signals into ultrasonic signals of corresponding preset frequencies and output them in a preset direction, so that the ultrasonic signals of the at least two preset frequencies form the difference frequency signal in the predetermined area.

3. The range hood according to claim 1, characterized in that: The controller is further used to control the audio injection module (10) to play a second audio injection signal, the frequency of the second audio injection signal being within the audible sound frequency range.

4. The range hood according to claim 3, characterized in that: The audio injection module (10) further comprises at least one speaker, and the controller is electrically connected to the at least one speaker; The controller is used to send corresponding audible sound frequency band electrical signals to each of the speakers respectively; The at least one speaker is used to convert the corresponding received electrical signal in the audible sound frequency band into the second audio injection signal for output.

5. The range hood according to claim 1, characterized in that: It also includes a main box (20) and a smoke collection hood (30); The smoke collecting hood (30) is arranged below the main box (20) and is in communication with the main box (20), and a smoke inlet (31) is provided on the front side of the smoke collecting hood (30); The audio injection module (10) is fixed below the main chassis (20) and is located in front of the smoke collection hood (30).

6. A range hood control method with directional audio injection, characterized in that: Applied to the range hood according to any one of claims 1 to 5, the range hood control method comprises: Determine whether to enable audio injection mode; Upon receiving the audio injection mode start instruction, determining whether to start the audio injection exclusive mode; When receiving an instruction to start the audio injection exclusive mode, the audio injection module is controlled to play ultrasonic signals of at least two preset frequencies to form a first audio injection signal in a predetermined area; wherein, the first audio injection signal is a difference frequency signal of the ultrasonic signals of the at least two preset frequencies, and the frequency of the difference frequency signal is within the audible sound frequency range.

7. The range hood control method according to claim 6, characterized in that: After determining whether to enable the audio injection mode, upon receiving the audio injection exclusive mode enable instruction, before controlling the audio injection module to play ultrasonic signals of at least two preset frequencies, the method further includes: When the audio injection mode start instruction is received, the audio injection module is controlled to play a second audio injection signal; wherein the frequency of the second audio injection signal is within the audible sound frequency range.

8. The range hood control method according to claim 7, characterized in that: Upon receiving the audio injection mode start instruction, after determining whether to start the audio injection exclusive mode, the method further includes: When the audio injection exclusive mode start instruction is not received, the audio injection module is controlled to continue playing the second audio injection signal.

9. The range hood control method according to claim 6, characterized in that: Before determining whether to enable audio injection mode, the following steps are also included: Confirm that the range hood start command has been received.

10. The range hood control method according to claim 9, characterized in that: After confirming receipt of the range hood start command, it also includes: Control the range hood to start normally.

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