Range hood with active noise reduction structure

Abstract

The utility model relates to the technical field of range hoods, and discloses a range hood with an active noise reduction structure, which comprises the active noise reduction structure and a range hood main body, the range hood main body comprises an upper box body and a lower cavity, and the lower cavity comprises a connecting cavity and a smoke collecting cavity. The active noise reduction structure comprises a controller, a loudspeaker and a microphone assembly, the microphone assembly comprises a reference microphone sensor and an error microphone sensor, the reference microphone sensor and the controller are both arranged on the upper box body, and the error microphone sensor and the loudspeaker are both arranged on the lower cavity. The reference microphone sensor is used for collecting noise in the upper box body and generating a first noise signal, the error microphone sensor is used for collecting noise in the lower cavity and generating a second noise signal, and the first noise signal and the second noise signal generate a noise signal; the controller is used for receiving the noise signal, generating a corresponding noise reduction signal and transmitting the noise reduction signal to the loudspeaker. The loudspeaker is used for generating noise reduction sound waves according to the noise reduction signal.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a range hood with an active noise reduction structure. Background Technology

[0002] Current designs for active noise cancellation devices in range hoods often treat the range hood as a duct, placing the microphone and speaker components inside to reduce noise transmitted through the air intake. However, due to the characteristics of sound propagation, noise levels vary throughout the range hood and reach the listener's ear. Collecting noise from only a single location limits the effectiveness of active noise cancellation and negatively impacts the user experience.

[0003] Therefore, there is an urgent need for a range hood with an active noise reduction structure to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a range hood with an active noise reduction structure, which has a good active noise reduction effect and can improve the user experience.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A range hood with an active noise reduction structure is provided, including an active noise reduction structure and a range hood body. The range hood body includes an upper housing and a lower cavity. The lower cavity includes a connecting cavity and a smoke collection cavity. The upper housing, the connecting cavity and the smoke collection cavity are connected in sequence.

[0007] The active noise cancellation structure includes a controller, a speaker, and a microphone assembly. The microphone assembly includes a reference microphone sensor and an error microphone sensor. The reference microphone sensor and the controller are both located in the upper housing, while the error microphone sensor and the speaker are both located in the lower cavity.

[0008] A reference microphone sensor is used to collect noise inside the upper cavity and generate a first noise signal, and an error microphone sensor is used to collect noise inside the lower cavity and generate a second noise signal. The first noise signal and the second noise signal generate a noise signal. The controller is used to receive the noise signal and generate a corresponding noise reduction signal to transmit to the speaker. The speaker is used to generate a noise reduction wave according to the noise reduction signal.

[0009] Optionally, a wire groove is provided on the outer wall of the connecting cavity, and the control wire portion of the active noise cancellation structure passes through the wire groove. The control wire is used to electrically connect the speaker, controller, and microphone assembly.

[0010] Optionally, the range hood with active noise reduction structure also includes a fixing member, which is disposed on the outer wall of the connecting cavity and is used to fix the control wire in the wire groove.

[0011] Optionally, the error microphone sensor is located in the connection cavity; or,

[0012] An error microphone sensor is located in the smoke collection chamber.

[0013] Optionally, the smoke collection chamber has a first air inlet, and a loudspeaker is disposed on the top wall, side wall, or bottom wall of the first air inlet; or,

[0014] The loudspeaker is located on the outer wall of the connecting cavity, and a sound hole is also provided on the cavity wall of the connecting cavity. The sound hole penetrates the cavity wall of the connecting cavity, and the sound-emitting part of the loudspeaker faces the sound hole.

[0015] Optionally, the bottom wall of the first air inlet is provided with a first mounting groove and an oil return groove. The first mounting groove is used to accommodate the speaker, and the oil return groove is arranged around the outer periphery of the first mounting groove.

[0016] Optionally, a second mounting groove is provided on the outer wall of the connecting cavity. The second mounting groove is recessed towards the inside of the connecting cavity, and the speaker hole is located at the bottom of the second mounting groove. The second mounting groove is used to accommodate the speaker.

[0017] Optionally, the lower cavity also has a lifting air inlet assembly, the smoke collection cavity has a through-hole at the end opposite to the connecting cavity, the lifting air inlet assembly is movably disposed at the through-hole, and the lifting air inlet assembly has a second air inlet;

[0018] The loudspeaker is installed on the outer bottom wall of the smoke collection chamber; or,

[0019] The speaker is installed on the side or bottom wall of the second air inlet.

[0020] Optionally, the range hood with active noise reduction structure also includes a protective net located outside the main body of the range hood and covering the speaker.

[0021] Optionally, the active noise cancellation structure further includes a first fixing component, which includes screws and a bracket. The bracket is mounted on the microphone assembly and has mounting holes. The screw passes through the mounting holes and connects to the main body of the range hood; and / or,

[0022] The active noise cancellation structure also includes a second fixing component, which comprises a fixing block and a sliding protrusion. One of the fixing block and the sliding protrusion is disposed on the main body of the range hood, and the other is disposed on the microphone assembly. The fixing block is provided with a sliding groove, and the sliding protrusion is inserted into the sliding groove; and / or,

[0023] The active noise cancellation structure also includes a third fixing component, which includes a latch mounted on the microphone assembly. A locking hole is provided on the main body of the range hood, allowing the latch to engage with the microphone assembly and the main body of the range hood; and / or,

[0024] The active noise cancellation structure also includes a fourth fixing component, which includes a plug plate. The plug plate is disposed on the microphone assembly, and a slot is provided on the main body of the range hood. The plug plate can be slidably inserted into the slot so that the microphone assembly is connected to the main body of the range hood.

[0025] The beneficial effects of this utility model are as follows:

[0026] This utility model proposes a range hood with an active noise reduction structure, comprising an active noise reduction structure and a main body. The main body includes an upper housing and a lower cavity. The lower cavity includes a connecting cavity and a smoke collection cavity. The upper housing, connecting cavity, and smoke collection cavity are sequentially connected. The active noise reduction structure includes a controller, a speaker, and a microphone assembly. The microphone assembly collects noise and transmits the noise signal to the controller. The controller then generates a corresponding noise reduction signal based on the noise signal and transmits it to the speaker. The speaker emits a noise reduction wave that matches the noise based on the noise reduction signal. The noise reduction wave and the noise can be superimposed and canceled out, achieving active noise reduction. The microphone assembly includes a reference microphone sensor and an error microphone sensor. The reference microphone sensor and the controller are both located in the upper housing, while the error microphone sensor and the speaker are both located in the lower cavity. A reference microphone sensor is used to collect noise from the upper cavity and generate a first noise signal, while an error microphone sensor is used to collect noise from the lower cavity and generate a second noise signal. The noise signals obtained from different locations are different. The second noise signal can be used to correct the first noise signal to generate the final noise signal. The controller then generates a corresponding noise-reduced signal based on the corrected noise signal and transmits it to the speaker. This range hood with an active noise reduction structure uses the second noise signal collected by the error microphone sensor in the lower cavity to correct the first noise signal collected by the reference microphone sensor in the upper cavity. This makes the noise-reduced wave emitted by the speaker more closely match the noise inside the range hood, effectively improving the noise reduction effect and enhancing the user experience. Attached Figure Description

[0027] Figure 1 This is a partial first structural schematic diagram of a range hood with an active noise reduction structure provided in Embodiment 1 of this utility model;

[0028] Figure 2 This is a partial second structural schematic diagram of the range hood with an active noise reduction structure provided in Embodiment 1 of this utility model;

[0029] Figure 3 This is a partial third structural schematic diagram of the range hood with active noise reduction structure provided in Embodiment 1 of this utility model;

[0030] Figure 4 This is a partial first structural schematic diagram of the range hood with active noise reduction structure provided in Embodiment 2 of this utility model;

[0031] Figure 5 This is a partial second structural schematic diagram of the range hood with an active noise reduction structure provided in Embodiment 2 of this utility model;

[0032] Figure 6 This is a partial third structural schematic diagram of the range hood with an active noise reduction structure provided in Embodiment 2 of this utility model;

[0033] Figure 7 This is a partial structural diagram of the range hood with an active noise reduction structure provided in Embodiment 3 of this utility model;

[0034] Figure 8 This is a schematic diagram of the active noise reduction structure provided in Embodiment 4 of this utility model;

[0035] Figure 9 This is a partial first structural schematic diagram of the range hood with an active noise reduction structure provided in Embodiment 4 of this utility model;

[0036] Figure 10 This is a partial second structural schematic diagram of the range hood with an active noise reduction structure provided in Embodiment 4 of this utility model;

[0037] Figure 11 This is a partial third structural schematic diagram of the range hood with an active noise reduction structure provided in Embodiment 4 of this utility model;

[0038] Figure 12 This is a partial structural exploded view of the range hood with active noise reduction structure provided in Embodiment 4 of this utility model;

[0039] Figure 13 This is a partial structural diagram of the range hood with an active noise reduction structure provided in Embodiment 5 of this utility model;

[0040] Figure 14 This is a partial structural exploded view of the range hood with active noise reduction structure provided in Embodiment 5 of this utility model;

[0041] Figure 15 This is a partial structural diagram of the microphone assembly and the first fixing assembly provided in Embodiment 1 of this utility model;

[0042] Figure 16 This is a partial structural diagram of the microphone assembly and the second fixing assembly provided in Embodiment 1 of this utility model;

[0043] Figure 17 This is a partial structural diagram of the microphone assembly and the third fixing assembly provided in Embodiment 1 of this utility model;

[0044] Figure 18This is a partial structural diagram of the microphone assembly and the fourth fixing assembly provided in Embodiment 1 of this utility model.

[0045] In the picture:

[0046] 1. Main body of the range hood; 11. Upper housing; 12. Connecting cavity; 121. Wire channel; 122. Second mounting slot; 123. Speaker hole; 13. Smoke collection chamber; 130. First air inlet; 131. First mounting slot; 132. Oil return channel; 14. Lifting air inlet assembly; 140. Second air inlet; 801. Clip hole; 901. Slot;

[0047] 2. Active noise cancellation structure; 21. Controller; 22. Reference microphone sensor; 23. Error microphone sensor; 24. Speaker; 25. Control line;

[0048] 3. Fasteners; 4. Protective netting; 5. Bracket; 6. Fixing block; 61. Sliding groove; 7. Sliding protrusion; 8. Buckle; 9. Insert plate. Detailed Implementation

[0049] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0050] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0053] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0054] Example 1

[0055] like Figures 1 to 3 As shown, this embodiment provides a range hood with an active noise reduction structure, including an active noise reduction structure 2 and a range hood body 1. The range hood body 1 includes an upper housing 11 and a lower cavity. The lower cavity includes a connecting cavity 12 and a smoke collection cavity 13. The upper housing 11, the connecting cavity 12, and the smoke collection cavity 13 are connected in sequence. A fan system is installed inside the upper housing 11, and the lower housing has an air inlet. When the fan system is working, it can draw oil fumes into the interior of the range hood body 1 through the air inlet. The active noise reduction structure 2 includes a controller 21, a speaker 24, and a microphone assembly. The microphone assembly is used to collect noise and transmit the noise signal to the controller 21. The controller 21 then generates a corresponding noise reduction signal based on the noise signal and transmits it to the speaker 24. The speaker 24 emits a noise reduction wave that matches the noise based on the noise reduction signal. The noise reduction wave and the noise can be superimposed and canceled out, achieving active noise reduction.

[0056] The microphone assembly provided in this embodiment includes a reference microphone sensor 22 and an error microphone sensor 23. The reference microphone sensor 22 and the controller 21 are both located in the upper housing 11, while the error microphone sensor 23 and the speaker 24 are both located in the lower cavity. The reference microphone sensor 22 is used to collect noise within the upper housing 11 and generate a first noise signal. The error microphone sensor 23 is used to collect noise within the lower cavity and generate a second noise signal. Since the noise signals obtained from different locations are different, the second noise signal can be used to correct the first noise signal to generate a new noise signal. The controller 21 then generates a corresponding noise-reducing signal based on the corrected noise signal and transmits it to the speaker 24. This range hood with an active noise reduction structure uses the second noise signal collected by the error microphone sensor 23 located in the lower cavity to correct the first noise signal collected by the reference microphone sensor 22 located in the upper housing 11. This allows the noise-reduced wave emitted by the speaker 24 to better match the noise within the range hood body 1, effectively improving the noise reduction effect and enhancing the user experience.

[0057] like Figure 2 and Figure 3 As shown, in this embodiment, the error microphone sensor 23 is disposed in the connection cavity 12. However, in other embodiments, the error microphone sensor 23 may also be disposed in the smoke collection cavity 13. The error microphone sensor 23 detects noise closer to the user side area to correct the first noise signal generated by the reference microphone sensor 22, thereby enabling the controller 21 to receive a more accurate noise signal and generate a more accurate noise reduction signal, thus improving the active noise reduction effect.

[0058] Optionally, a wire groove 121 is provided on the outer wall of the connecting cavity 12, and a portion of the control line 25 of the active noise cancellation structure 2 passes through the wire groove 121. The control line 25 is used to electrically connect the speaker 24, the controller 21, and the microphone assembly. In this embodiment, the wire groove 121 is formed by recessing a portion of the outer wall of the connecting cavity 12 towards the inside of the connecting cavity 12. In other embodiments, a sheet metal part with a groove structure can also be added to the outer wall of the connecting cavity 12, so that the groove structure serves as the wire groove 121.

[0059] refer to Figures 1 to 3 In this embodiment, the controller 21 and the reference microphone sensor 22 are both disposed in the upper housing 11, and the error microphone sensor 23 is disposed in the smoke collection chamber 13. The smoke collection chamber 13 has a first air inlet 130, and the speaker 24 is disposed on the top wall of the first air inlet 130. The control line 25 includes a first control line, a second control line, and a third control line. The first control line connects the controller 21 and the reference microphone sensor 22, the second control line connects the controller 21 and the error microphone sensor 23, and the third control line connects the controller 21 and the speaker 24. The first control line is arranged inside the upper housing 11. The second control line is led out from the upper housing 11, passes through the wire groove 121, and then passes through the cavity wall of the connecting cavity 12 to connect with the error microphone sensor 23. The third control line is led out from the upper housing 11, passes through the wire groove 121, and then passes through the cavity wall of the smoke collection chamber 13 to connect with the speaker 24.

[0060] Optionally, the range hood with an active noise reduction structure also includes a fixing member 3, which is disposed on the outer wall of the connecting cavity 12. The fixing member 3 is used to fix the control line 25 to the outer wall of the connecting cavity 12. Figure 2 and Figure 3 As shown, in this embodiment, the error microphone sensor 23 is located in the connecting cavity 12 and close to the smoke collection cavity 13, and the speaker 24 is located in the smoke collection cavity 13. The distance between both and the controller 21 is relatively large, that is, the length of the second control line and the third control line is relatively long. The fixing part 3 can prevent the second control line and the third control line from leaving the wire groove 121, so as to ensure the assembly stability of the active noise reduction structure 2 and the smoke machine body 1.

[0061] In practice, the number of fasteners 3 and the spacing between adjacent fasteners 3 can be determined according to the lengths of the second and third control lines. The fasteners 3 can be sheet metal clip structures or strap structures, only needing to secure the control line 25.

[0062] Optionally, such as Figure 15 As shown, the active noise cancellation structure 2 includes a first fixing component, which includes screws and a bracket 5. The bracket 5 is mounted on the microphone assembly and has mounting holes. The screws pass through the mounting holes and connect to the main body 1 of the range hood. In a specific implementation, both the reference microphone sensor 22 and the error microphone sensor 23 can be mounted on the main body 1 of the range hood in this manner. The connection between the screws and the main body 1 of the range hood is detachable, facilitating the replacement or maintenance of the active noise cancellation structure 2.

[0063] Optionally, such as Figure 16 As shown, the active noise cancellation structure 2 includes a second fixing component, which includes a fixing block 6 and a sliding protrusion 7. One of the fixing block 6 and the sliding protrusion 7 is disposed on the main body 1 of the range hood, and the other is disposed on the microphone assembly. The fixing block 6 is provided with a sliding groove 61, and the sliding protrusion 7 can be slidably inserted into the sliding groove 61. In this embodiment, the fixing block 6 is disposed on the main body 1 of the range hood, and the sliding protrusion 7 is disposed on the microphone assembly. The sliding direction of the sliding protrusion 7 is perpendicular to the sliding direction of the sliding protrusion 7. The cross-section of the sliding protrusion 7 is T-shaped, and the structure of the sliding groove 61 is adapted to it. The sliding groove 61 is only open at one end. When the fixing block 6 is not installed horizontally, the end of the sliding groove 61 without an opening is located below the opening end of the sliding groove 61 to prevent the sliding protrusion 7 from sliding out of the sliding groove 61. In specific implementation, the reference microphone sensor 22 and the error microphone sensor 23 can both be installed on the main body 1 of the range hood in this way. The connection between the sliding protrusion 7 and the sliding groove 61 is a detachable connection, which facilitates the replacement or maintenance of the active noise cancellation structure 2.

[0064] Optionally, such as Figure 17As shown, the active noise cancellation structure 2 includes a third fixing component, which includes a buckle 8. The buckle 8 is disposed on the microphone assembly, and the main body 1 of the range hood has a locking hole 801. The buckle 8 can be locked into the locking hole 801 to connect the microphone assembly to the main body 1 of the range hood. In this embodiment, the buckle 8 includes two spring arms disposed opposite each other. One end of the spring arm is connected to the microphone assembly, and the other end of the spring arm has a locking protrusion. When both spring arms are inserted into the locking hole 801, the spring arms are partially deformed by the inner wall of the locking hole 801, so that the locking protrusion can pass through the locking hole 801 and be located on the side of the locking hole 801 away from the microphone assembly. Then the spring arms deform and return to their original shape, so that the buckle 8 is fixed in the locking hole 801. In specific implementation, the reference microphone sensor 22 and the error microphone sensor 23 can both be installed on the main body 1 of the range hood in this way. The connection between the buckle 8 and the locking hole 801 is a detachable connection, which facilitates the replacement or maintenance of the active noise cancellation structure 2.

[0065] Optionally, such as Figure 18 As shown, the active noise cancellation structure 2 includes a fourth fixing component, which includes an insert plate 9. The insert plate 9 is disposed on the microphone assembly, and a slot 901 is provided on the main body 1 of the range hood. The insert plate 9 can be slidably inserted into the slot 901 to connect the microphone assembly to the main body 1 of the range hood. In this embodiment, a guide plate is provided on the main body 1 of the range hood to form a gap between the guide plate and the main body 1 of the range hood. This gap is the slot 901. There is also a gap between the insert plate 9 and the microphone assembly. When the insert plate 9 is inserted into the slot 901, the guide plate will be located in the gap between the insert plate 9 and the microphone assembly. In this embodiment, the end of the guide plate that is not connected to the main body 1 of the range hood is inclined to increase the spacing at the opening of the slot 901, making it easier to insert the insert plate 9. In specific implementation, the insertion direction of the insert plate 9 is from top to bottom. The reference microphone sensor 22 and the error microphone sensor 23 can both be installed on the main body 1 of the range hood in this way. The connection between the insert plate 9 and the slot 901 is a detachable connection, which facilitates the replacement or maintenance of the active noise cancellation structure 2.

[0066] Example 2

[0067] This embodiment provides a range hood with an active noise reduction structure. The difference between the range hood with an active noise reduction structure provided in this embodiment and the range hood with an active noise reduction structure in Embodiment 1 is as follows:

[0068] like Figures 4 to 6 As shown, the speaker 24 is located at the bottom wall of the first air inlet 130. In a specific implementation, the third control line connecting the controller 21 and the speaker 24 is led out from the upper housing 11, passes through the wire groove 121, and then passes through the interlayer between the inner and outer walls of the smoke collection chamber 13 to connect with the speaker 24, so as to avoid the third control line being located in the lower cavity and reduce the adhesion of oil on the third control line.

[0069] Optionally, the bottom wall of the first air inlet 130 is provided with a first mounting groove 131 and an oil return groove 132. The speaker 24 is located in the first mounting groove 131, and the oil return groove 132 is arranged around the outer periphery of the first mounting groove 131. In a specific implementation, the bottom wall of the first air inlet 130 is inclined. During the operation of the range hood, the oil fumes sucked up condense into oil stains. When there is a lot of oil stains, they may roll on the inclined bottom wall and easily accumulate at the speaker 24. Excessive oil stains will affect the normal use of the speaker 24. In this embodiment, the speaker 24 is installed in the first mounting groove 131, and the oil return groove 132 is arranged around the outer periphery of the first mounting groove 131. The path of the oil stains rolling to the first mounting groove 131 is blocked by the oil return groove 132, that is, the oil stains can only flow to the oil return groove 132 and cannot continue to flow to the first mounting groove 131.

[0070] Optionally, the range hood with active noise reduction structure also includes a protective net 4, which is located outside the main body 1 and covers the speaker 24. In this embodiment, the protective net 4 is located at the first air inlet 130 of the smoke collection chamber 13, and covers the opening of the first mounting groove 131 to shield the speaker 24. The protective net 4 is used to prevent oil and other impurities from falling directly into the first mounting groove 131, thus avoiding oil contamination of the speaker 24. In this embodiment, the protective net 4 is a hexagonal mesh structure, while in other embodiments, the protective net 4 can also be a quadrilateral, pentagonal, or other mesh structure.

[0071] In other embodiments, the speaker 24 may also be located on the side wall of the first air inlet 130.

[0072] Apart from the above, the other structures of the range hood with active noise reduction structure provided in this embodiment are the same as those of the range hood with active noise reduction structure in Embodiment 1, and will not be described again here.

[0073] Example 3

[0074] This embodiment provides a range hood with an active noise reduction structure. The difference between the range hood with an active noise reduction structure provided in this embodiment and the range hood with an active noise reduction structure in Embodiment 1 is as follows:

[0075] like Figure 7 As shown, the speaker 24 is located on the outer wall of the connecting cavity 12. The cavity wall of the connecting cavity 12 is also provided with a sound hole 123, which penetrates the cavity wall of the connecting cavity 12. The sound-emitting part of the speaker 24 is positioned facing the sound hole 123, which allows the sound to be transmitted to the lower cavity through the sound hole 123, and also prevents the speaker 24 from being affected by oil stains when located in the lower cavity, while also facilitating maintenance and replacement.

[0076] Optionally, a second mounting groove 122 is provided on the outer wall of the connecting cavity 12. The second mounting groove 122 is recessed towards the inside of the connecting cavity 12, and a speaker hole 123 is provided at the bottom of the second mounting groove 122. The speaker 24 is installed in the second mounting groove 122. In specific implementation, the speaker 24 can be fixed to the inner wall of the second mounting groove 122, or a cover plate can be provided at the opening of the second mounting groove 122 to fix the speaker 24 in the second mounting groove 122.

[0077] Apart from the above, the other structures of the range hood with active noise reduction structure provided in this embodiment are the same as those of the range hood with active noise reduction structure in Embodiment 1, and will not be described again here.

[0078] Example 4

[0079] This embodiment provides a range hood with an active noise reduction structure. The difference between the range hood with an active noise reduction structure provided in this embodiment and the range hood with an active noise reduction structure in Embodiment 1 is as follows:

[0080] like Figures 8 to 12 As shown, the lower cavity also has a lifting air inlet assembly 14. The smoke collection chamber 13 has a through-hole on the side opposite to the connecting chamber 12. The lifting air inlet assembly 14 is movably disposed in the through-hole. The lifting air inlet assembly 14 has a second air inlet 140, through which oil fumes can enter the main body 1 of the range hood. The speaker 24 is disposed on the outer bottom wall of the smoke collection chamber 13. In a specific implementation, the control line 25 connecting the speaker 24 can be placed inside the main body 1 of the range hood through an opening in the bottom wall of the smoke collection chamber 13, thereby connecting to the controller 21. A groove is provided on the outer bottom wall of the smoke collection chamber 13, and the speaker 24 is located in the groove. A protective net 4 is placed on the groove to cover the speaker 24.

[0081] Apart from the above, the other structures of the range hood with active noise reduction structure provided in this embodiment are the same as those of the range hood with active noise reduction structure in Embodiment 1, and will not be described again here.

[0082] Example 5

[0083] This embodiment provides a range hood with an active noise reduction structure. The difference between the range hood with an active noise reduction structure provided in this embodiment and the range hood with an active noise reduction structure in Embodiment 1 is as follows:

[0084] like Figures 13 to 14As shown, the lower cavity also has a lifting air intake assembly 14. The smoke collection chamber 13 has a through-hole on the side opposite to the connecting chamber 12. The lifting air intake assembly 14 is movably disposed in the through-hole. The lifting air intake assembly 14 has a second air inlet 140, through which oil fumes can enter the main body 1 of the range hood. The speaker is disposed on the side wall of the second air inlet 140. In a specific implementation, the control line 25 connecting the speaker 24 can be placed inside the main body 1 of the range hood through the opening on the lifting air intake assembly 14, thereby connecting to the controller 21. A groove is provided on the side wall of the second air inlet 140, and the speaker 24 is located in the groove. A protective net 4 is placed on the groove to cover the speaker 24.

[0085] In other embodiments, the speaker 24 may also be located on the bottom wall of the second air inlet 130.

[0086] Apart from the above, the other structures of the range hood with active noise reduction structure provided in this embodiment are the same as those of the range hood with active noise reduction structure in Embodiment 1, and will not be described again here.

[0087] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A range hood with an active noise reduction structure, characterized in that, It includes an active noise reduction structure (2) and a smoke hood body (1). The smoke hood body (1) includes an upper box (11) and a lower cavity. The lower cavity includes a connecting cavity (12) and a smoke collection cavity (13). The upper box (11), the connecting cavity (12) and the smoke collection cavity (13) are connected in sequence. The active noise cancellation structure (2) includes a controller (21), a speaker (24) and a microphone assembly. The microphone assembly includes a reference microphone sensor (22) and an error microphone sensor (23). The reference microphone sensor (22) and the controller (21) are both located in the upper housing (11), and the error microphone sensor (23) and the speaker (24) are both located in the lower cavity. The reference microphone sensor (22) is used to collect noise in the upper enclosure (11) and generate a first noise signal. The error microphone sensor (23) is used to collect noise in the lower cavity and generate a second noise signal. The first noise signal and the second noise signal generate a noise signal. The controller (21) is used to receive the noise signal and generate a corresponding noise reduction signal to transmit to the speaker (24). The speaker (24) is used to generate a noise reduction wave according to the noise reduction signal.

2. The range hood with an active noise reduction structure according to claim 1, characterized in that, The outer wall of the connecting cavity (12) is provided with a wire groove (121), and part of the control line (25) of the active noise reduction structure (2) passes through the wire groove (121). The control line (25) is used to electrically connect the speaker (24), the controller (21) and the microphone assembly.

3. The range hood with an active noise reduction structure according to claim 2, characterized in that, The range hood with active noise reduction structure also includes a fixing member (3), which is disposed on the outer wall of the connecting cavity (12) and is used to fix the control line (25) in the wire groove (121).

4. The range hood with an active noise reduction structure according to claim 1, characterized in that, The error microphone sensor (23) is disposed in the connecting cavity (12); or, The error microphone sensor (23) is disposed in the smoke collection chamber (13).

5. The range hood with an active noise reduction structure according to claim 1, characterized in that, The smoke collection chamber (13) has a first air inlet (130), and the loudspeaker (24) is disposed on the top wall, side wall, or bottom wall of the first air inlet (130); or, The loudspeaker (24) is disposed on the outer wall of the connecting cavity (12). A sound-speaking hole (123) is also disposed on the cavity wall of the connecting cavity (12). The sound-speaking hole (123) penetrates the cavity wall of the connecting cavity (12), and the sound-speaking part of the loudspeaker (24) faces the sound-speaking hole (123).

6. The range hood with an active noise reduction structure according to claim 5, characterized in that, The bottom wall of the first air inlet (130) is provided with a first mounting groove (131) and an oil return groove (132). The first mounting groove (131) is used to accommodate the speaker (24), and the oil return groove (132) is arranged around the outer periphery of the first mounting groove (131).

7. The range hood with an active noise reduction structure according to claim 5, characterized in that, The outer wall of the connecting cavity (12) is provided with a second mounting groove (122), the second mounting groove (122) is recessed towards the inner side of the connecting cavity (12), the speaker hole (123) is provided at the bottom of the second mounting groove (122), and the second mounting groove (122) is used to accommodate the speaker (24).

8. The range hood with an active noise reduction structure according to claim 1, characterized in that, The lower cavity also has a lifting air inlet assembly (14), the smoke collection cavity (13) has a through-hole at one end away from the connecting cavity (12), the lifting air inlet assembly (14) is movably disposed at the through-hole, and the lifting air inlet assembly (14) has a second air inlet (140). The loudspeaker (24) is disposed on the outer bottom wall of the smoke collection chamber (13); or, The speaker (24) is disposed on the side wall or bottom wall of the second air inlet (140).

9. The range hood with an active noise reduction structure according to claim 1, characterized in that, The range hood with active noise reduction structure also includes a protective net (4), which is located outside the main body (1) of the range hood and covers the speaker (24).

10. The range hood with an active noise reduction structure according to claim 1, characterized in that, The active noise cancellation structure (2) further includes a first fixing component, which includes a screw and a bracket (5). The bracket (5) is disposed on the microphone assembly and has mounting holes. The screw passes through the mounting holes and connects to the main body (1) of the smoke machine; and / or, The active noise reduction structure (2) further includes a second fixing component, which includes a fixing block (6) and a sliding protrusion (7). One of the fixing block (6) and the sliding protrusion (7) is disposed on the main body (1) of the smoke machine, and the other is disposed on the microphone assembly. A sliding groove (61) is provided on the fixing block (6), and the sliding protrusion (7) is inserted into the sliding groove (61); and / or, The active noise reduction structure (2) further includes a third fixing component, which includes a buckle (8) disposed on the microphone assembly. A locking hole (801) is provided on the main body (1) of the range hood, and the buckle (8) can be locked into the locking hole (801) to connect the microphone assembly to the main body (1); and / or, The active noise reduction structure (2) further includes a fourth fixing component, which includes a plug plate (9) disposed on the microphone assembly. A slot (901) is provided on the main body (1) of the range hood. The plug plate (9) can be slidably inserted into the slot (901) so that the microphone assembly is connected to the main body (1) of the range hood.

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