CN216793292U

CN216793292U - Range hood with active noise reduction device

Info

Publication number: CN216793292U
Application number: CN202122142339.3U
Authority: CN
Inventors: 时璐璐; 翁建松; 贾翔; 茅忠群; 诸永定
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-06-21
Anticipated expiration: 2031-09-06

Abstract

The utility model relates to a range hood with an active noise reduction device, which comprises an upper box body, a lower box body and the active noise reduction device, wherein the upper box body is provided with an upper cavity, a fan system is arranged in the upper cavity, the lower box body is provided with a lower cavity, the active noise reduction device is provided with a microphone for collecting noise signals generated by the range hood, a processor for generating the noise reduction signals and at least one loudspeaker for playing the noise reduction signals, and the processor is respectively connected with the microphone and the loudspeaker; it is characterized in that at least one loudspeaker is arranged in the lower cavity. Because the loudspeaker of the active noise reduction device is arranged in the lower cavity, the noise reduction signal played by the loudspeaker can be effectively transmitted in the lower cavity under the conditions of not changing the structure of the range hood and not reducing the area of the air inlet, and the noise reduction effect of the active noise reduction device on the noise generated by the whole range hood is further improved.

Description

Range hood with active noise reduction device

Technical Field

The utility model relates to the field of range hoods, in particular to a range hood with an active noise reduction device.

Background

In the field of range hoods, a low-suction upper-discharge range hood is a common range hood type. The low-suction upper-discharge type range hood generally comprises an upper box body and a lower box body, wherein the upper box body is formed with an upper cavity, a fan system is arranged in the upper cavity, the lower box body is formed with a lower cavity, and a left guide plate and a right guide plate are arranged in the lower cavity. When the range hood works, an active noise reduction mechanism (i.e., an active noise reduction device) is usually adopted to reduce the noise generated when the range hood works, and a speaker used in the active noise reduction is usually arranged at an air inlet of the low-suction upper-discharge range hood.

However, the low-suction upper-discharge range hood adopting the active noise reduction mechanism still has some problems: in the actual active noise reduction process, the area of the air inlet has a large influence on the active noise reduction effect. After the loudspeaker is arranged at the air inlet of the low-suction upper-exhaust type range hood, the area of the air inlet is reduced due to the arrangement of the loudspeaker, the propagation space of a noise reduction signal played by the loudspeaker in the range hood is shortened, and finally a better noise reduction effect cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a range hood with an active noise reduction device aiming at the prior art. The range hood can effectively increase the propagation space of noise reduction signals played by the loudspeaker in the range hood without changing the structure of the existing low-suction upper-discharge range hood, and enhance the noise reduction effect.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a range hood with an active noise reduction device comprises:

the upper box body is provided with an upper cavity, and a fan system is arranged in the upper cavity;

the lower box body is provided with a lower cavity;

the active noise reduction device is provided with a microphone for collecting noise signals generated by the range hood, a processor for generating the noise reduction signals and at least one loudspeaker for playing the noise reduction signals, wherein the processor is respectively connected with the microphone and the loudspeaker;

it is characterized in that at least one loudspeaker is arranged in the lower cavity.

Further, in the range hood with the active noise reduction device, at least one loudspeaker positioned in the lower cavity is arranged on the guide plate.

In the range hood with the active noise reduction device, a sound absorption device is arranged between a loudspeaker arranged on a guide plate and the guide plate.

In the range hood with the active noise reduction device, a loudspeaker box is arranged on the guide plate, the loudspeaker is positioned in the loudspeaker box, and the sound absorption device is positioned between the loudspeaker box and the guide plate.

Optionally, in the range hood with the active noise reduction device, the microphone is located in the upper cavity and below the fan system; or the microphone is positioned between the lower end of the upper cavity and the upper end of the lower cavity.

Furthermore, in the range hood with the active noise reduction device, two guide plates are arranged in the lower cavity, and the loudspeaker arranged on the guide plate is positioned on the side face of the guide plate opposite to the other guide plate.

In order to directionally and accurately collect the noise generated by the fan system, the audio collection end of the microphone is arranged towards the direction of the fan system in the upper cavity in the range hood with the active noise reduction device.

In the range hood with the active noise reduction device, at least one loudspeaker is arranged on the rear wall in the lower cavity.

Furthermore, in the range hood with the active noise reduction device, the loudspeaker arranged on the rear wall in the lower cavity is positioned between the air inlet of the range hood and the upper cavity.

Furthermore, in the range hood with the active noise reduction device, the horn mouth of the loudspeaker arranged on the rear wall in the lower cavity faces the air inlet.

Compared with the prior art, the utility model has the advantages that: in the utility model discloses an among the range hood, the space of cavity under make full use of is on the guide plate of cavity or the back wall of cavity in the cavity under on the active speaker setting of device of making an uproar falls. Therefore, under the condition of not changing the structure of the range hood and not reducing the area of the air inlet, the noise reduction signal played by the loudspeaker can be effectively transmitted in the lower cavity, and the noise reduction effect of the active noise reduction device on the noise generated by the whole range hood is further improved.

Drawings

FIG. 1 is a schematic structural diagram of a range hood with an active noise reduction device according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram of the main functional components in the range hood according to the embodiment of the present invention;

FIG. 3 is a schematic view of the range hood of FIG. 1 with the dome and trim cover removed;

FIG. 4 is a front view of the range hood of FIG. 3;

fig. 5 is a schematic view showing the positional relationship between the sound absorbing device and the speaker box.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

The embodiment provides a range hood with an active noise reduction device. Specifically, referring to fig. 1 to 5, the range hood with the active noise reduction device in this embodiment includes an upper box 1, a lower box 2 and the active noise reduction device, the upper box 1 forms an upper cavity 10, a fan system 11 is disposed in the upper cavity 10, and a decoration cover 12 for covering the fan system 11 is disposed outside the upper box 1; the lower box body 2 is provided with a lower cavity 20, a guide plate 21 positioned on the left side and a guide plate 21 positioned on the right side are arranged in the lower cavity 20, and a guide cover 22 is also arranged on the lower box body 2; the active noise reduction device is provided with a microphone 31 for collecting noise signals generated by the range hood, a processor 32 for generating the noise reduction signals and three loudspeakers 33 for playing the noise reduction signals, wherein the microphone 31 is positioned in the upper cavity 10 and below the fan system 11, and an audio collection end of the microphone 31 is arranged towards the direction of the fan system in the upper cavity, so that the noise generated by the fan system can be directionally and accurately collected; the left air deflector 21 and the right air deflector 21 are both provided with a loudspeaker box 5, the two loudspeaker boxes 5 are respectively positioned on the opposite side surfaces of the left air deflector and the right air deflector, each loudspeaker box 5 is internally provided with one loudspeaker 33, the third loudspeaker 33 of the three loudspeakers 33 is arranged on the rear wall of the lower cavity 20 and is specifically positioned between the air inlet of the range hood and the upper cavity 10 (not shown in the figure), and the bell mouth of the loudspeaker 33 positioned on the rear wall of the lower cavity 20 faces the air inlet; and still be provided with sound absorbing device 4 between the guide plate 21 of each speaker box 5 and corresponding side, be provided with in sound absorbing device 4 and inhale sound absorbing materials such as sound cotton, be in same guide plate one side promptly, be provided with sound absorbing device 4 between speaker box 5 and this guide plate 21, microphone 31 is located cavity 10 and is located the below of fan system 11, and treater 32 can do independent setting or integrated to range hood's controller as required. The arrangement relationship among the microphone 31, the speaker 33, the sound absorbing device 4, the speaker box 5, and the baffle 21 is shown with reference to fig. 3 and the drawings. Wherein, the processor 32 is connected to the microphone 31 and each speaker 33, and the connection relationship among the microphone 31, the processor 32 and the speaker 33 is shown in fig. 2. In practical cases, the microphone 31 may also be disposed at a position between the lower end of the upper chamber 10 and the upper end of the lower chamber 20, as needed.

After the active noise reduction device of this embodiment starts active noise reduction, the microphone 31 sends the collected noise signal S1 generated by the range hood to the processor 32, and then the processor 32 generates the noise reduction signal S2 for canceling the noise signal S1 according to the noise signal S1, and each speaker 33 is enabled to play the noise reduction signal S2. Because the loudspeaker 33 is arranged on the guide plate 21 in the lower cavity 20 or on the rear wall in the lower cavity 20, the space of the lower cavity is fully utilized under the condition that the structure of the range hood is not changed and the area of the air inlet is not reduced, the noise reduction signal played by the loudspeaker 33 can be effectively transmitted in the lower cavity 20, and the noise reduction effect of the active noise reduction device on the noise generated by the whole range hood is further improved.

Claims

1. A range hood with an active noise reduction device comprises:

the upper box body (1) is provided with an upper cavity (10), and a fan system (11) is arranged in the upper cavity (10);

a lower box body (2) which is provided with a lower cavity (20);

the active noise reduction device is provided with a microphone (31) for collecting noise signals generated by the range hood, a processor (32) for generating the noise reduction signals and at least one loudspeaker (33) for playing the noise reduction signals, wherein the processor (32) is respectively connected with the microphone (31) and the loudspeaker (33);

characterized in that at least one loudspeaker (33) is arranged in the lower chamber (20).

2. The extractor hood with active noise reduction device according to claim 1, wherein at least one speaker (33) located in the lower cavity (20) is disposed on the baffle (21).

3. The extractor hood with active noise reduction device according to claim 2, wherein a sound absorption device (4) is disposed between the speaker (33) disposed on the air guide plate (21) and the air guide plate (21).

4. The range hood with the active noise reduction device according to claim 3, wherein the air guide plate (21) is provided with a speaker box (5), the speaker (33) is located in the speaker box (5), and the sound absorption device (4) is located between the speaker box (5) and the air guide plate (21).

5. The range hood with the active noise reduction device according to any one of claims 1 to 4, wherein the microphone (31) is located in the upper cavity (10) and below the fan system (11); or the microphone (31) is positioned between the lower end of the upper cavity (10) and the upper end of the lower cavity (20).

6. The range hood with the active noise reduction device according to any one of claims 1 to 4, wherein two baffles (21) are disposed in the lower cavity (20), and the speaker (33) disposed on the baffles is disposed on a side of the baffle (21) opposite to another baffle.

7. The range hood with the active noise reduction device according to any one of claims 1 to 4, wherein the audio collection end of the microphone (31) is disposed toward the upper cavity blower system.

8. The extractor hood with active noise reduction device according to any of claims 1 to 4, wherein at least one speaker (33) is disposed on the rear wall of the lower cavity (20).

9. The range hood with active noise reduction device according to claim 8, wherein the speaker (33) disposed on the inner rear wall of the lower cavity (20) is located between the air inlet of the range hood and the upper cavity (10).

10. The range hood with active noise reduction device according to claim 9, wherein the speaker (33) installed on the inner rear wall of the lower cavity (20) has a bell mouth facing the air inlet.