Mounting structure of sound acquisition device and range hood

Abstract

The utility model relates to a mounting structure of a sound collecting device and a range hood, the sound collecting device is arranged in an air duct of a lampblack sucking device and comprises a sound collecting element used for collecting sound signals, the side wall of the air duct is provided with a placing concave cavity which is partially concave towards the interior of the air duct, and the placing concave cavity is provided with a sound collecting element used for collecting sound signals. The mounting structure of the sound collection device comprises a mounting frame covering the opening of the placement cavity, the sound collection element is arranged on the side wall of the side, facing the placement cavity, of the mounting frame, and sound receiving holes allowing sound of the air duct to enter the placement cavity are distributed in the wall of the placement cavity. The mounting structure has the advantages that the mounting structure design of the sound acquisition device relates to few parts, the mounting rack and the sound acquisition elements arranged on the mounting rack can be directly mounted or dismounted from the outside of the air duct, the dismounting and mounting process of the protection device is greatly simplified, and subsequent maintenance, replacement and cleaning operation of the protection device are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to an installation structure of a sound collection device and a range hood. Background Art

[0002] A range hood is a kitchen appliance for purifying the kitchen environment. The noise of the range hood has always been one of the main problems troubling users. Active noise reduction, as a new noise reduction technology, has also been considered for application on range hoods for noise reduction. An active noise reduction device usually includes a microphone and a speaker, that is, the microphone collects the noise generated when the range hood is working, and the collected noise sound wave is transmitted to the controller in the form of an electrical signal. After being analyzed and processed by the controller, an instruction is sent to the speaker to control the speaker to emit a sound wave matching the noise sound wave to neutralize the noise sound wave, so as to achieve the noise reduction effect. For example, the Chinese invention patent application with the application number CN202010935185.0 (the application publication number is: CN111928310A) discloses such a range hood with an active noise reduction function. The microphone of this range hood is arranged inside the housing and surrounds the blower in an array distribution manner, and the speaker assembly is distributed below the blower. Another example is the "Range Hood and Its Active Noise Reduction Device" with the application number CN202221822214.3 and the "Low-Noise Range Hood" with the application number CN202222650354.3, which also have similar disclosures.

[0003] In order to ensure the noise reduction effect, the microphones and speakers used in the existing active noise reduction systems are often arranged inside the air duct of the range hood. However, due to the oily environment of the range hood, the microphones and speakers are often contaminated, resulting in a reduction in the noise reduction effect of the active noise reduction system over time and even malfunction. For this reason, the Chinese utility model patent application with the application number CN201820250745.7 discloses an active noise reduction device for a range hood with an oil-proof device, including an input device, a central data processor, and a noise reduction unit. The input device includes a microphone, and the microphone is arbitrarily installed at a place on the range hood. The noise reduction unit includes at least two noise reduction boxes, which are arranged at the bottom of the volute of the range hood and face the air inlet. An oil-proof device is arranged below the noise reduction box, and the oil-proof device is also arranged at the bottom of the volute and covers the noise reduction box. The oil-proof device includes a porous sound-permeable shell and an oil-proof sound-permeable film attached to the surface of the porous sound-permeable shell. At least one noise reduction speaker is arranged in the noise reduction box. The microphone and the noise reduction speaker are both connected to the central data processor. The central data processor loads a self-check module and an oil pollution detection module for the noise reduction device. The oil pollution detection module detects the oil pollution and damage condition of the oil-proof device, and the self-check module receives and processes the self-system signals reported by the device to determine whether there is an increase in the microphone and the noise reduction speaker. At the same time, a timing detection module is arranged in the self-check module.

[0004] However, the oil-proof device of the active noise reduction device in the above patent application still has certain deficiencies. First of all, components such as the noise reduction box are arranged at the bottom of the volute of the range hood. When the corresponding components of the active noise reduction device need to be repaired, replaced or cleaned, the outer shell of the range hood needs to be disassembled to perform the corresponding operations. The above operation process is relatively cumbersome, and the time cost of the repair or cleaning process is relatively high. Secondly, the above oil-proof device realizes sound transmission and oil-proof through the porous sound-transmitting shell and the oil-proof film attached to the surface of the porous sound-transmitting shell, without considering the influence of the wind noise in the air duct of the range hood, that is, no effective wind noise reduction treatment is carried out; on the other hand, for the above-mentioned porous sound-transmitting shell, if the number of openings is large, it will have an adverse effect on oil-proof and wind-proof, and if the number of openings is small, more noise will be lost during the propagation process, resulting in a decrease in the accuracy of sound collection. Therefore, how to provide a protection device for the active noise reduction system of a range hood that can effectively prevent oil and achieve the purpose of wind prevention, thereby ensuring the accuracy of sound collection has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0005] The first technical problem to be solved by the present utility model is to provide an installation structure of a sound collection device that is convenient for disassembly and assembly, and is conducive to repair, replacement and cleaning in view of the current situation of the prior art.

[0006] The second technical problem to be solved by the present utility model is to provide an installation structure of a sound collection device that can achieve the purposes of oil prevention and wind prevention, and can fully collect noise signals, thereby ensuring the accuracy of sound collection in view of the current situation of the prior art.

[0007] The third technical problem to be solved by the present utility model is to provide a range hood that applies the installation structure of the above-mentioned sound collection device in view of the current situation of the prior art.

[0008] The technical solution adopted by the present utility model to solve the first technical problem is: an installation structure of a sound collection device, the sound collection device is arranged in the air duct of the oil fume collection device, and it includes a sound collection element for collecting sound signals. A local placement cavity is recessed towards the inside of the air duct on the side wall of the air duct. The installation structure of the sound collection device of the sound collection device includes an installation frame covering the open end of the placement cavity. The sound collection element is arranged on the side wall of the installation frame facing the placement cavity, and sound collection holes for the sound in the air duct to enter the placement cavity are distributed on the wall of the placement cavity.

[0009] The above-mentioned "air duct" is understood to be any section of the flow path from the air inlet of the smoke collecting hood of a self-priming oil fume device (which can be a range hood or an integrated stove) to the location of the fan system. For example, it can refer to the inner cavity space of the smoke collecting hood, the space inside the fan frame where the fan system is located, or the channel structure between the fan system and the air outlet of the smoke collecting hood.

[0010] An installation structure of a sound collection device formed by the cooperation of an installation cavity recessed into the air duct from the side wall of the air duct and an installation frame for placing a sound collection element can prevent oil stains in the air duct from contacting the sound collection element. The sound in the air duct can also enter the installation cavity through the sound receiving holes distributed on the wall of the installation cavity for the sound collection element to collect. The above structural design involves fewer components. The installation frame and the sound collection element arranged thereon can be directly installed or disassembled from outside the air duct, greatly simplifying the disassembly and assembly process of the protection device and facilitating the subsequent maintenance, replacement, and cleaning operations of the protection device.

[0011] To facilitate the installation of the sound collection element, the installation frame includes an installation plate extending vertically and a convex platform protruding from the installation plate towards the inside of the installation cavity. A receiving groove is formed on the convex platform, and the sound collection element is arranged in the receiving groove.

[0012] To further reduce the contamination of the sound collection element by oil stains, the receiving groove has a sound inlet communicating with the installation cavity, and an oil-proof sound-transmitting membrane is covered at the sound inlet.

[0013] The technical solution adopted by the present utility model to solve the second technical problem is as follows: the sound inlet is opened on the side surface of the convex platform facing the bottom wall of the installation cavity, and a gap channel is formed between the above side surface of the convex platform and the bottom wall of the installation cavity. A wind-proof sound-transmitting member is arranged in the gap channel. The wind-proof sound-transmitting member can effectively eliminate wind noise. Even if a small amount of air flow enters the gap channel, the pressure pulsation can be weakened in the wind-proof sound-transmitting member, thereby reducing the influence on the sound collection accuracy of the microphone.

[0014] As an improvement, the wind-proof sound-transmitting member is a sound-transmitting member made of porous sound-absorbing material.

[0015] To achieve the diversion of the air flow and improve the wind-proof effect, the wall of the installation cavity includes a vertical wall opposite to the convex platform and extending vertically, an upper inclined wall gradually inclined upwards and outwards from the upper side of the vertical wall, and a lower inclined wall gradually inclined downwards and outwards from the lower side of the vertical wall. The structural design of the inclined wall of the above installation cavity can form a diversion surface in the air duct, avoiding large air flow disturbances caused by the direct impact of the air flow on the wall of the installation cavity and affecting the stability of the air flow.

[0016] Generally speaking, the sound collecting holes can be arranged on the vertical wall or the upper inclined wall to avoid facing the oncoming flow direction of the air flow in the air duct and reduce the wind noise. Preferably, the air duct extends vertically, and the air flow in the air duct flows from bottom to top, and the sound collecting holes are arranged on the upper inclined wall.

[0017] As an improvement, a wire passing hole for leading out a wire connected to the sound collecting element is also formed on the mounting plate.

[0018] The technical solution adopted by the present utility model to solve the third technical problem is: an oil fume extractor, including an air duct for flue gas to pass through and a sound collecting device arranged in the air duct, and the sound collecting device is arranged on the side wall of the air duct by using the mounting structure of the above-mentioned sound collecting device.

[0019] As an improvement, the sound collecting element is a microphone.

[0020] Compared with the prior art, the advantages of the present utility model are: the mounting structure of the sound collecting device formed by the cooperation of the placement cavity recessed into the air duct from the side wall of the air duct and the mounting rack for placing the sound collecting element can prevent the oil stain in the air duct from contacting the sound collecting element, and the sound in the air duct can also enter the placement cavity through the sound collecting holes distributed on the wall of the placement cavity for the sound collecting element to collect. The above structural design involves fewer components, and the mounting rack and the sound collecting element arranged thereon can be directly installed or disassembled from outside the air duct, greatly simplifying the disassembly and assembly process of the protection device and facilitating the subsequent maintenance, replacement and cleaning operations of the protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of the mounting structure of the sound collecting device according to an embodiment of the present utility model;

[0022] Figure 2 is a three-dimensional structural schematic diagram of another angle of the mounting structure of the sound collecting device according to an embodiment of the present utility model;

[0023] Figure 3 is a partial cross-sectional view of the mounting structure of the sound collecting device according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] In the description and claims of the present utility model, terms indicating directions such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc. are used to describe various exemplary structural parts and elements of the present utility model. However, these terms are used only for the purpose of convenience in description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present utility model can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0026] Figures 1 - 3 An installation structure of the sound collection device of the present utility model and a preferred embodiment of the range hood are shown. Figure 1 An independently provided box body is shown as the air duct 10. The air duct 10 has a front side wall 101 and a rear side wall 102 opposite to each other in the front-rear direction and a left side wall 103 and a right side wall 104 opposite to each other in the left-right direction. Among them, a protection device (for placing the microphone) is provided on both the front side wall 101 or the rear side wall 102 of the air duct 10. Specifically, an installation cavity 100 is formed by a partial inward indentation of the side wall of the air duct 10, and the mounting bracket 20 can be installed from outside the air duct 10 to the open end of the installation cavity 100. After the mounting bracket 20 is installed in place, the four peripheral edges of the mounting bracket 20 are attached to the four peripheral edges of the open end of the installation cavity 100, that is, the open end of the installation cavity 100 is covered. The installation cavity 100 on the side wall of the air duct 10 has an upper inclined wall 1001 that inclines downward from top to bottom towards the inside of the air duct 10, a vertical wall 1002 extending downward from the bottom of the inclined wall, and a lower inclined wall 1003 extending downward from the bottom of the vertical wall 1002 and inclining outward towards the air duct 10.

[0027] The mounting bracket 20 includes a vertically extending mounting plate 201 and a boss 202 protruding from the side wall of the mounting plate 201 towards the inside of the placement cavity 100. The position where the boss 202 is located is opposite to the vertical wall 1002 of the placement cavity 100 in the horizontal direction. Sound collection holes 10010 for the sound in the air duct 10 to enter the placement cavity 100 are also distributed on the upper inclined wall 1001 of the air duct 10. A receiving groove 21 for placing the sound collection element 11 (i.e., the microphone) is formed on the side wall of the boss 202 facing the vertical wall 1002. The receiving groove 21 has a sound inlet 210 facing the vertical wall 1002 of the placement cavity, and an oil-proof sound-transmitting membrane 28 is covered at the sound inlet 210. A gap channel is reserved between the side wall of the boss 202 facing the vertical wall 1002 and the vertical wall 1002 of the placement cavity of the air duct 10. This gap channel is the sound collection channel 200 for the sound to enter the receiving groove 21 of the mounting bracket 20. A wind-proof sound-transmitting member 30 is also filled in the sound collection channel 200. The wind-proof sound-transmitting member 30 is arranged along the extending direction of the sound collection channel 200 and covers the sound inlet 210, which can play a role in preventing wind noise.

[0028] The lower inclined wall 1003 of the air duct 10 forms a guiding inclined surface in the oncoming flow direction of the air flow in the air duct 10, which effectively improves the problem of wind noise generated by the air flow directly hitting the lower inclined wall 1003 of the air duct 10, and further ensures the accuracy of the sound collection element 11 for collecting the target noise.

[0029] A wire passing hole 2010 for leading out the wire connected to the microphone is also formed on the mounting plate 201 of the mounting bracket 20. The protection device of this embodiment has a simple structure. The wire of the microphone can be routed from the outside of the air duct 10, which is convenient for cleaning and maintenance. In the later stage, the microphone can be regularly removed for cleaning the outer surface. In addition, the microphone is basically isolated from the outside of the oil path in the air duct 10, avoiding oil stains from depositing on the mounting bracket 20 of the microphone and the leading-out wire, and also keeping the inside of the oil path in the air duct 10 clean and tidy.

[0030] This embodiment also relates to a range hood, which includes an air duct 10 for the flue gas to pass through and an active noise reduction system arranged on the side wall of the air duct 10. The active noise reduction system includes a sound collection element 11 for collecting sound signals. The sound collection element 11 uses a microphone, and the microphone is arranged in the receiving groove 21 of the above-mentioned mounting bracket 20 and then installed on the side wall of the air duct 10 together.

[0031] On the basis of the above embodiments, other embodiments can be obtained by replacing and improving the relevant technical features. For example, the above-mentioned air duct structure is not limited to an independent box body, and can also be the fan frame or the smoke collecting hood structure of the range hood.

Claims

1. An installation structure of a sound collection device, where the sound collection device is arranged in the air duct (10) of an oil fume suction device, and it includes a sound collection element (11) for collecting sound signals, and is characterized in that: The side wall of the air duct (10) has an installation cavity (100) that is partially recessed towards the inside of the air duct (10). The installation structure of the sound collection device includes an installation frame (20) covering the open end of the installation cavity (100). The sound collection element (11) is arranged on a side wall of the installation frame (20) facing the installation cavity (100). Sound receiving holes (10010) for the sound in the air duct (10) to enter the installation cavity (100) are distributed on the wall of the installation cavity (100).

2. The installation structure of the sound collection device according to claim 1, characterized in that: The installation frame (20) includes a vertically extending installation plate (201) and a boss (202) protruding from the installation plate (201) towards the inside of the installation cavity (100). A receiving groove (21) is formed on the boss (202), and the sound collection element (11) is arranged in the receiving groove (21).

3. The mounting structure of the sound collection device according to claim 2, characterized in that: The receiving groove (21) has a sound inlet (210) communicating with the installation cavity (100), and an oil-proof sound-permeable membrane covers the sound inlet (210).

4. The mounting structure of the sound collection device according to claim 3, characterized in that: The sound inlet (210) is formed on a side surface of the boss (202) facing the bottom wall of the installation cavity (100). A gap channel (200) is formed between the above-mentioned side surface of the boss (202) and the bottom wall of the installation cavity (100), and a wind-proof sound-permeable member (30) is arranged in the gap channel (200).

5. The mounting structure of the sound collection device according to claim 4, characterized in that: The wind-proof sound-permeable member (30) is a sound-permeable member made of porous sound-absorbing material.

6. The mounting structure of the sound collection device according to any one of claims 2 to 5, characterized in that: The wall of the installation cavity (100) includes a vertical wall (1002) opposite to the boss (202) and extending vertically, an upper inclined wall (1001) gradually inclined upwards and outwards from the upper side of the vertical wall (1002) towards the outside of the air duct (10), and a lower inclined wall (1003) gradually inclined downwards and outwards from the lower side of the vertical wall (1002) towards the outside of the air duct (10).

7. The installation structure of the sound collection device according to claim 6, characterized in that: The air duct (10) extends vertically, and the air flow in the air duct (10) flows from bottom to top. The sound receiving holes (10010) are arranged on the upper inclined wall (1001).

8. The mounting structure of the sound collection device according to any one of claims 2 to 5, characterized in that: A wire passing hole (2010) for leading out a wire connected to the sound collection element (11) is also formed on the installation plate (201).

9. An oil fume suction machine, comprising a duct (10) for flue gas to pass through and a sound collection device arranged in the duct (10), characterized in that: The sound collection device is arranged on the side wall of the air duct by using the installation structure of the sound collection device according to any one of claims 1 to 8.

10. The range hood according to claim 9, characterized in that: The sound collection element (11) is a microphone.

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